Schneider Electric A9F74102 — iC60N 1P 2A Breaker Buying Guide

By Abdullah Zahid
14 min read
Schneider Electric A9F74102 iC60N 1-pole 2A C-curve miniature circuit breaker for DIN rail panel installation

Schneider Electric A9F74102 iC60N Miniature Circuit Breaker - 1P - 2A - C Curve: Specifications, Pricing, and Buying Guide

Controls engineers and panel integrators searching for the Schneider Electric A9F74102 are typically at the final stage of a procurement decision — they have a confirmed 2A branch circuit to protect, a DIN rail panel to populate, and a need to verify that this exact part satisfies both domestic and industrial standards before committing to an order. The A9F74102 is a single-pole, 2-amp, C-curve miniature circuit breaker from the Acti9 iC60N family, rated to 400VAC with a 500VAC insulation voltage, and certified to both EN/IEC 60898-1 and EN/IEC 60947-2 — making it one of the few commodity breakers at this current rating that covers both regulatory regimes from a single SKU.

If you have already confirmed this is the correct part for your application, check current pricing and availability for the A9F74102 at LeadTime.ca — ships worldwide.

Who Should Buy the A9F74102 — and Who Shouldn't

The Schneider Electric A9F74102 is the right choice for engineers and buyers whose application meets all of the following criteria:

  • The protected circuit requires exactly 2A rated current — not 3A, not 4A, not adjustable
  • Single-phase (1P) protection is confirmed on the circuit design drawing
  • The installation requires compliance with EN/IEC 60898-1 (domestic) or EN/IEC 60947-2 (industrial), or both
  • The panel uses standard 35mm DIN rail and the 18mm (1-module) footprint fits the available space
  • Operating environment falls within -35 to +70 Celsius and pollution degree 3 is acceptable

If your circuit requires 3A or higher, order A9F74103 (3A) or the appropriate next size up in the Acti9 iC60N family. If multi-phase isolation is required, this 1P model is not the correct choice — 2P, 3P, and 4P variants exist in the same family. If B-curve (sensitive electronics) or D-curve (inductive motor loads) characteristics are needed, a different iC60N variant applies.

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Where the A9F74102 Fits in Your Distribution System

The Schneider Electric A9F74102 operates as a branch-level protection and isolation device — it sits downstream of a main or sub-main breaker and upstream of the specific load it protects, providing both automatic fault interruption and a safe manual isolation point for maintenance personnel. Its 2A rating positions it specifically for low-current branch applications: pilot power circuits, instrumentation feeds, sensor power supplies, and sub-circuits within MCC panels where individual branch isolation is required without oversizing the protection device.

It is not a main distribution device. At 2A rated current, it is designed for terminal-level branch protection, not feeder protection. Specifying it on any circuit whose design load exceeds 2A will result in nuisance tripping from the first power-on.

Typical Panel Architecture for Branch Circuit Protection

Understanding where the A9F74102 sits in the signal and power chain helps panel designers and maintenance teams visualize how it integrates without adding coordination complexity:

  • Upstream main circuit breaker or busbar — provides primary fault protection for the full distribution panel
  • Sub-distribution rail or terminal bus — distributes power to individual branch positions on DIN rail
  • Schneider Electric A9F74102 — mounted on 35mm DIN rail at 18mm width; provides 2A protection and manual isolation for one downstream branch
  • Protected load — pilot power supply, instrumentation transmitter, PLC input module power feed, emergency lighting circuit, or similar low-current device
  • VisiTrip indicator — faces the panel operator and provides immediate visual confirmation of breaker status without requiring any test equipment

Typical Applications and Deployment Scenarios for the A9F74102

The A9F74102 is most commonly found in panels where multiple low-current branch circuits require individual protection and isolation. MCC (Motor Control Center) panel builders use it to protect individual branch circuits within a motor control bucket — particularly pilot and control power circuits that feed contactors, relays, and auxiliary devices rather than the motor load itself.

In control cabinet design, the A9F74102 is a standard choice for protecting the power supply feeding a PLC input module or a 24VDC power supply where the primary AC input is a low-current branch circuit. The 2A rating matches the typical input current draw of pilot power supplies in these configurations.

Instrumentation panels in process industries — water treatment, pump stations, HVAC control rooms — use this breaker to protect transmitter power feeds and 4-20mA loop supply circuits. The combination of compact 18mm width and the IP20 protection rating (IP40 when housed in a modular enclosure) makes it suitable for both climate-controlled control rooms and unheated field cabinets within the -35 to +70 Celsius operating range.

UPS distribution cabinets and emergency lighting systems are additional common deployment environments. At 2A, this breaker protects auxiliary AC distribution outputs and emergency exit lighting sub-feeds where low-current individual branch protection is required by code without adding panel footprint.

Application Typical Deployment
MCC bucket branch protection Individual pilot and control power circuits within motor control center panels; replacing aging trip breakers
PLC input module power supply branch Isolated 2A circuit feeding pilot power supply in industrial control cabinet
Instrumentation circuit protection Sensor and transmitter power protection in process control panels; pump stations and water treatment
UPS distribution output branch Protecting auxiliary AC distribution in data center backup power cabinets
Emergency lighting circuit Low-current emergency exit lighting sub-feed protection in commercial building distribution panels

Technical Specifications and Purchase-Decision Data

Parameter Value Notes
Rated Current 2A Fixed; order A9F74103 (3A) or higher for larger circuits
Tripping Curve C-type General load protection; B-curve available for sensitive electronics, D-curve for inductive loads
Breaking Capacity (Domestic) 6000A at 230VAC EN/IEC 60898-1 standard; confirm with installer which standard governs your installation
Breaking Capacity (Industrial) 50kA at 220-240VAC EN/IEC 60947-2 standard; required for factory and heavy industrial installations
Insulation Voltage 500VAC Safe for both 230VAC and 400VAC systems
Maximum Operating Voltage 400VAC Verify system voltage before ordering
Width (DIN rail modules) 1 module (18mm) Compact format; saves panel space vs. 2-module breakers
Overall Dimensions 18mm W x 85mm H x 78.5mm D Standard Acti9 iC60N form factor
Operating Temperature -35 to +70 Celsius Suitable for unheated outdoor cabinets to heated control rooms
Electrical Life 10,000 cycles Full trip-and-reset cycles; 20,000 mechanical cycles without load

Full technical specifications are available on the product page at LeadTime.ca.

A9F74102 vs. Other iC60N Variants: Which Rated Current Do You Need?

All models in the following table share the same 18mm (1-module) DIN rail footprint, C-curve tripping characteristic, and dual EN/IEC 60898-1 / EN/IEC 60947-2 compliance. The only variable is rated current. Select based on your confirmed circuit design requirement — do not round up or down from the design drawing value.

Model Number Rated Current Poles Tripping Curve Primary Use
A9F74102 2A 1P C Pilot circuits, instrumentation power — this model
A9F74103 3A 1P C Light branch circuits; next size up if 2A is insufficient
A9F74104 4A 1P C General branch circuits; common in residential panels
A9F74105 6A 1P C Lighting feeders; higher capacity variant
A9F74106 10A 1P C Power circuits; typical for outlet circuits
A9F74108 16A 1P C Sub-main circuits; common panel feeder
A9F74110 20A 1P C Main circuits; upper limit for 1-pole format in this family

If your load analysis confirms anything above 2A, the A9F74102 is not the correct model — check the full Acti9 iC60N family availability at LeadTime.ca to confirm the correct variant before ordering.

For buyers also evaluating system-level alternatives from other manufacturers, the table below provides a direct comparison. These are not drop-in replacements — terminal configurations differ between brands and panel-specific compatibility must be confirmed before substitution.

Product Rated Current Poles Breaking Capacity Standards Notes
Schneider Electric A9F74102 2A 1P 6000A / 50kA EN 60898-1 / EN 60947-2 This model; compact 18mm modular format, dual-standard certified
ABB S201-C2 2A 1P 6000A / 50kA EN 60898-1 / EN 60947-2 Similar electrical specifications; different panel form factor and terminal configuration
Siemens 5SX21 C2 2A 1P 6000A EN 60898-1 only Domestic standard only; no industrial 50kA variant — not suitable for EN 60947-2 installations
Legrand DX3 2A 1P 2A 1P 4500A EN 60898-1 Lower breaking capacity; push-in terminals; budget option for domestic-only installations
Eaton FAZ-C2 2A 1P 6000A / 50kA EN 60898-1 / EN 60947-2 Comparable breaking capacity; different rail interface — confirm panel compatibility before specifying

Expert Verdict: Is the A9F74102 Worth Specifying?

The Schneider Electric A9F74102 earns its place as a standard component in panel builders' inventory through a combination of factors that matter at specification time, not just at purchase time. The dual certification to both EN/IEC 60898-1 (domestic, 6000A breaking capacity) and EN/IEC 60947-2 (industrial, 50kA breaking capacity) from a single SKU eliminates the inventory and design overhead of maintaining separate part numbers for products sold into different regulatory markets. For OEM panel manufacturers shipping to multiple regions, that is a real supply chain simplification, not a marketing claim. The 10,000-cycle electrical life — which at a typical nuisance trip rate of 1-2 times per year for pilot circuits equates to decades of service before replacement — and the VisiTrip visual fault indicator that satisfies EN 61439-1 isolation verification requirements without a multimeter are both verifiable, datasheet-confirmed differentiators. At 18mm (1 module) width, it also delivers panel density that older switch-disconnector formats cannot match, giving MCC and distribution panel designers measurable footprint savings per bay.

Where the A9F74102 has real limits: it is a 2A, 1P, C-curve device and nothing else. If your circuit design calls for 3A, the A9F74103 is the correct model — there is no adjustment range, no field-configurable current setting, and no margin for rounding. If your protected load is a sensitive electronic instrument that requires B-curve tripping, or a motor-heavy circuit that requires D-curve, you need a different iC60N variant regardless of current rating. And if the installation is a three-phase circuit requiring full three-conductor isolation, a 3P breaker is required — not three individual 1P units. The A9F74102 is also not the lowest-cost option in the market if your installation is domestic-standard-only; single-standard alternatives (such as the Legrand DX3 at 4500A breaking capacity) exist at lower price points and are adequate where EN 60947-2 industrial compliance is not required.

From a procurement standpoint, the A9F74102 is a widely stocked commodity item with typical lead times of one to three business days from major electrical distributors. For emergency replacement in a production environment, that availability profile is a genuine operational asset. Ordering through a specialist automation distributor rather than a general retail channel adds a layer of technical verification before shipment — catching wrong-current or wrong-curve orders before they reach the panel — and provides cross-reference capability if your design drawing model number does not match what is currently in stock. For volume panel build schedules, bulk pricing and supply consistency are available through established distributor relationships. Check current pricing and stock status for the A9F74102 at LeadTime.ca — orders ship worldwide.

For volume pricing, lead time confirmation ahead of a panel build schedule, or technical cross-reference assistance, contact the LeadTime.ca team directly — we ship worldwide and respond to quote requests promptly.

What Engineers Need to Know Before Ordering the A9F74102

Because the A9F74102 is a commodity OEM component selected primarily by panel integrators and electrical engineers rather than end-user technicians, it generates little public forum discussion — buyers at this level know what they need and order accordingly. That professional familiarity with the product category, however, is also where ordering errors tend to occur: an engineer who has installed hundreds of miniature circuit breakers can still pull the wrong catalog number from memory or select the wrong current rating when working under time pressure on a panel build schedule.

The most consequential errors with this specific model involve current rating confusion and pole count mismatches. A 2A breaker installed on a 5A or 10A circuit will trip immediately under normal load — and the resulting troubleshooting investigation can consume hours of maintenance time before the wrong breaker rating is identified as the cause. Conversely, a 3A or higher breaker installed where a 2A was specified creates an over-protection condition that may allow sustained overload current to damage downstream equipment before the breaker reacts. Neither failure mode is obvious at installation — both look like an equipment fault until the breaker rating is checked against the design drawing.

The breaking capacity distinction — 6000A under EN/IEC 60898-1 (domestic) versus 50kA under EN/IEC 60947-2 (industrial) — is a second area where specialist distributor advice delivers real value. The A9F74102 carries both certifications, so the specification alone does not tell you which standard governs your installation. A qualified electrician or facility engineer needs to confirm which regulatory regime applies to your panel location before the specification is finalized. When that determination is uncertain, contacting a specialist distributor for pre-order technical verification is a lower-cost step than replacing incorrectly specified breakers after a panel audit.

DIN Rail Installation and Wiring Overview

The following is an installation overview for planning purposes. Always follow Schneider Electric's official installation documentation and comply with local electrical codes and lockout/tagout procedures before working on energized panels.

  • The A9F74102 mounts on a standard 35mm DIN rail using a snap-on hook mechanism; the 18mm (1-module) width must be verified against available panel space before installation
  • De-energize and verify zero voltage on the panel before mounting; confirm the breaker is fully seated by applying downward pressure after snapping onto rail — movement indicates improper seating
  • Line (incoming) conductor connects to the top terminal; load (outgoing) conductor connects to the bottom terminal — follow markings on the breaker body and tighten to manufacturer-specified torque
  • After wiring, confirm the VisiSafe green indicator is visible when the handle is switched to ON — this confirms physical contact closure without requiring a multimeter
  • Test the manual trip function before applying load; if VisiTrip indicator shows a fault condition immediately after installation, isolate the circuit and verify downstream wiring for short circuits before re-energizing

Compatible Accessories and System Expansion

The A9F74102 is part of the Acti9 iC60N modular family, which supports a range of accessories for enhanced functionality in distribution panels. The following accessories are documented as compatible within the Acti9 system:

  • Modular housing enclosures — provide IP40 protection level for the breaker in dusty or contaminated environments where IP20 is insufficient
  • Auxiliary contacts and alarm contacts — add remote trip indication or status monitoring capability to the breaker position without replacing the breaker itself
  • Motor mechanisms — enable remote ON/OFF switching of the breaker handle for automated or remotely controlled isolation applications
  • Voltage release accessories — allow the breaker to be tripped remotely by a control signal (undervoltage release) for safety interlock applications
  • DIN rail busbar connectors — support comb-type busbar connections for multi-pole or multi-breaker configurations on a shared distribution busbar within the same Acti9 panel layout

Wrong-Part Prevention Checklist Before Ordering the A9F74102

Verify all six of the following checks against your circuit design drawing and panel specification before completing your order. If any check fails, identify the correct model before purchasing.

  1. Pole count verification: Confirm single-phase (1P) protection is needed; do not substitute with 2P or 3P if three-phase isolation is required
  2. Rated current match: This model is rated 2A - if the circuit requires 3A or higher, order A9F74103 (3A) or next size up; if lower is required, no smaller standard option exists
  3. Tripping curve confirmation: C-curve (standard load protection) is correct for residential and general commercial; B-curve models exist for sensitive electronics, D-curve for inductive loads
  4. Voltage compatibility check: Rated for 230VAC to 400VAC systems with 500VAC insulation - verify your system voltage matches before order
  5. Enclosure temperature environment: Verify operating range -35 to 70 Celsius fits your cabinet location (outdoor cabinets, heated control rooms, unheated structures)
  6. Breaking capacity standard selection: Confirm whether your installation follows domestic standard (6000A @ 230VAC) or industrial standard (50kA @ 220-240VAC); both are certified on this model

If any of the above checks raises a question you cannot resolve from your design documentation, contact the LeadTime.ca team before ordering — our technical team can help verify the correct part number against your application requirements before shipment.

Frequently Asked Questions

Can the A9F74102 be used on a 400VAC system, or is it rated for 230VAC only?

The A9F74102 is rated for systems up to 400VAC, with a 500VAC insulation voltage providing the required safety margin. The 6000A breaking capacity applies at 230VAC under EN/IEC 60898-1; the 50kA industrial breaking capacity applies at 220-240VAC under EN/IEC 60947-2. Confirm with your facility engineer which voltage class and which standard governs your specific panel before specifying.

What is the practical difference between the 6000A and 50kA breaking capacities listed for this model?

Both values describe the same physical breaker — they reflect which certification standard is being applied. The 6000A figure is the breaking capacity under EN/IEC 60898-1 (domestic installations such as residential panels and light commercial). The 50kA figure applies under EN/IEC 60947-2 (industrial installations such as factory MCCs and heavy process panels). Your electrician or panel manufacturer will know which standard your installation is governed by; you do not need two different breakers to cover both.

Is the A9F74102 a direct mechanical replacement for a 2A breaker from a different manufacturer?

Not necessarily. While the electrical ratings may be comparable between brands at 2A C-curve, terminal configurations and DIN rail clip geometries differ between manufacturers. The ABB S201-C2, Siemens 5SX21 C2, and Eaton FAZ-C2 are system-level alternatives with similar specifications but different physical interfaces. Confirm with your panel manufacturer or integrator before substituting brands in an existing panel.

How many electrical cycles does the A9F74102 support before replacement is required?

Schneider Electric specifies 10,000 electrical cycles (full trip-and-reset cycles) for the A9F74102, and 20,000 mechanical cycles (manual on-off without load). For a pilot circuit or instrumentation branch that trips once or twice per year under fault conditions, the 10,000-cycle rating represents several decades of service life before scheduled replacement is warranted.

What does the VisiTrip indicator look like when the breaker has tripped, and how do I reset it?

When the A9F74102 trips on fault, the VisiTrip indicator changes its visual appearance at the front face of the breaker — providing immediate identification of the tripped position during a panel walkdown without requiring test equipment. To reset, first clear the downstream fault condition, then manually move the handle to the OFF position and then back to ON. If the breaker trips again immediately, the downstream fault has not been fully cleared.

Does the A9F74102 require an external fuse or upstream protection device in addition to its own protection?

No. The A9F74102 provides its own short-circuit and overload protection and does not require an external fuse in series. Installing an additional upstream fuse in series on the same branch circuit can disrupt proper protection coordination. If sub-branch protection is needed downstream of this breaker, install a lower-rated breaker at the sub-branch level rather than adding a fuse at the same level.

Why Order the A9F74102 from LeadTime.ca

  • Global shipping — LeadTime.ca ships worldwide, including to Canada and international destinations, with no geographic restriction on orders
  • Specialist sourcing — technical team can cross-reference model numbers and verify correct variant before shipment, reducing wrong-part returns on commodity breaker orders
  • Volume pricing available — contact for current pricing on multi-unit panel build quantities
  • Responsive quoting — suitable for both single-unit MRO replacement orders and scheduled OEM panel build supply

A9F74102 At-a-Glance Summary

  • Rated current: 2A — fixed; no adjustment; order A9F74103 for 3A circuits
  • Pole configuration: 1P — single-phase circuits only; 3P required for three-phase isolation
  • Tripping curve: C-type — general load protection; B-curve and D-curve variants available in iC60N family
  • Breaking capacity: 6000A at 230VAC (EN/IEC 60898-1) and 50kA at 220-240VAC (EN/IEC 60947-2) — both certified on this single SKU
  • Insulation voltage: 500VAC — suitable for 230VAC and 400VAC systems
  • Width: 18mm (1 DIN module) — mounts on standard 35mm DIN rail
  • Overall dimensions: 18mm W x 85mm H x 78.5mm D; weight 0.215kg
  • Operating temperature: -35 to +70 Celsius; storage: -40 to +85 Celsius
  • Electrical life: 10,000 cycles; mechanical life: 20,000 cycles
  • VisiTrip fault indicator and VisiSafe isolation confirmation — meets EN 61439-1 visual isolation verification requirement
  • Pollution degree 3 and overvoltage category IV — suitable for industrial environments with conductive contamination
  • Compliance: EN/IEC 60898-1, EN/IEC 60947-2, RoHS/REACH — dual-standard coverage from a single SKU simplifies multi-market panel design

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