Schneider A9A26924 — Acti 9 Auxiliary Contact Buying Guide

By Abdullah Zahid
15 min read
Schneider Electric A9A26924 Acti 9 iOF 1 C/O auxiliary contact module for DIN rail installation in industrial control panels

Schneider A9A26924 Acti 9 - Auxiliary Contact iOF - 1 C/O - AC/DC: Specifications, Compatibility, and Replacement Options

If you are a maintenance technician tracking down a failed signaling contact in an existing Acti 9 panel, or a panel builder confirming a BOM entry before a retrofit job, the Schneider A9A26924 is the exact part you are looking at. This is the Acti 9 iOF auxiliary contact in 1 C/O (changeover) configuration, rated from 24 VDC to 415 VAC, housed in a 9 mm wide module that clips directly onto the Acti 9 family of circuit breakers and protective devices. Before you commit to an order, there is one critical detail to flag: the A9A26924 was discontinued by Schneider Electric as of June 1, 2024, with replacement models A9A26904 and A9A26914 now recommended for new installations. For retrofit and spare parts sourcing in established panels, the A9A26924 remains relevant — but lead time and stock availability vary depending on where you source it.

If you have already confirmed this is the right part, check current pricing and availability at LeadTime.ca — ships worldwide.

Who Should Buy the A9A26924 — and Who Shouldn't

The A9A26924 is the right choice if all of the following apply to your situation:

  • Your existing panel uses an Acti 9 base device — iC60, iDPN Vigi, iID, iSW, iSW-NA, ARA, RCA, or iC40 — and you need a drop-in replacement without redesign
  • Your signaling circuit operates between 24 VDC and 415 VAC and draws no more than 6 A at low-voltage DC or 3 A at 415 VAC
  • Your enclosure has exactly 9 mm of available horizontal DIN rail space for the module
  • Your wiring conductors fall within the 0.5–4 mm² range accepted by the screw clamp terminals
  • Your control circuit requires a single changeover contact (1 C/O) — not a 2 C/O configuration

If you are specifying a new installation rather than maintaining an existing one, Schneider Electric's recommended replacement models are A9A26904 (100 mA to 6 A, wider voltage range) or A9A26914 (2 mA to 100 mA, for sensitive low-current circuits). Neither alternative requires changes to the Acti 9 base device, but both offer forward compatibility you will not get from a discontinued part.

On this page:

What the A9A26924 Actually Does in an Acti 9 System

The A9A26924 is not a circuit breaker — it is a signaling component. Its job is to give you an independent electrical contact that changes state when the Acti 9 base device it is mounted on trips, closes, or opens. That contact is completely isolated from the main load circuit, which means you can wire it to a buzzer, an LED indicator, a relay coil, or a PLC digital input without any interaction with the protected load. The iOF designation refers to this isolated open contact function — the contact reports device position without being part of the power circuit.

The 1 C/O (changeover) contact form gives you both a normally open and a normally closed terminal pair from a single module. When the base device is in its normal closed position, the normally closed path is complete. When the base device trips, the contact switches: the normally closed path opens and the normally open path closes. This makes the A9A26924 suitable for alarm signaling, interlock logic, remote shutdown coordination, and SCADA or PLC input monitoring — any application where you need a binary state signal that tracks what the circuit breaker is doing, without tapping into the load side.

At 9 mm wide, the module is designed for enclosures where every millimeter of DIN rail counts. The clip-on mounting means installation does not require tools beyond a small flathead screwdriver for the terminal screws. The screw clamp accepts conductors from 0.5 mm² to 4 mm², covering the wire gauges typical in control and signaling circuits.

Typical System Architecture: Where This Contact Sits

The A9A26924 sits between the Acti 9 circuit breaker and the downstream signaling or monitoring circuit. It has no connection to the main power conductors — it is a purely mechanical and electrical add-on that reports device state.

  • Main supply or distribution board feeds into the Acti 9 base device (e.g., iC60 or iDPN Vigi) protecting a load circuit
  • The A9A26924 clips onto the base device on the DIN rail, mechanically linked to the breaker's trip mechanism
  • The changeover contact terminals connect via 0.5–4 mm² conductors to the control or signaling circuit — buzzer, indicator lamp, relay, or PLC input
  • The signaling circuit operates independently at its own voltage (24 VDC to 415 VAC) — separate from the main load voltage
  • The PLC, SCADA system, or alarm panel receives the contact state change and triggers the appropriate response

Applications and Deployment Scenarios for the Acti 9 A9A26924

The A9A26924 is deployed wherever an Acti 9 circuit breaker or protective device needs to communicate its state to an external system without requiring the engineer to tap the main power conductors. In manufacturing plants, this typically means wiring the changeover contact to a panel-mounted indicator light so operators can see at a glance whether a protected circuit is live or tripped. In HVAC systems, the contact feeds a building automation controller input, allowing the BMS to log trip events and generate maintenance alerts automatically.

Water treatment and light industrial machine automation are frequent deployment environments because these applications combine Acti 9 switchgear with PLC-based monitoring. The 1 C/O contact provides a single digital input to the PLC — no additional signal conditioning required at standard industrial voltages. For alarm signaling, the normally closed path drives a buzzer continuously while the circuit is healthy; when the breaker trips, the normally open path energizes the alarm. Interlock logic applications use the changeover contact to coordinate equipment start and stop sequences, ensuring downstream machinery cannot start when an upstream protective device has tripped.

Application Typical Deployment
Alarm signaling Normally open contact wired to buzzer or bell; activates on breaker trip in manufacturing or HVAC panels
Remote shutdown coordination Changeover contact feeds relay or PLC output enabling remote deactivation from separate control location
Status indication Normally open contact drives LED indicator showing load status or device position in control room
Interlock logic Changeover contact in safety interlock circuit to prevent downstream equipment start when upstream breaker is tripped
SCADA and PLC monitoring Normally open contact connected to PLC digital input for telemetry and equipment state tracking in water treatment or industrial automation
Building automation Contact feeds BMS controller input for fault logging and maintenance alert generation in small commercial installations

Electrical Ratings, Dimensions, and Contact Specifications

Specification Value
Contact Form 1 C/O (Changeover)
Rated Current at 24 VDC 6 A
Rated Current at 240 VAC (50/60 Hz) 6 A
Rated Current at 415 VAC (50/60 Hz) 3 A
Rated Insulation Voltage 500 V
Impulse Withstand Voltage 4 kV
Operating Temperature Range -35 to +70 °C
Module Width 9 mm
Wire Terminal Acceptance 0.5–4 mm² (screw clamp)
Protection Degree IP20 (terminals) / IP40 (enclosure)

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

A9A26924 vs. A9A26904 vs. A9A26914: Which Model Do You Actually Need?

Model Rated Current Range Voltage Range Contact Configuration Best For Status
A9A26924 1–6 A (voltage-dependent) 24 VDC–415 VAC 1 C/O Retrofit and spare parts in existing Acti 9 panels Discontinued June 2024; stock varies by distributor
A9A26904 100 mA–6 A 24 VAC–415 VAC, 24–220 VDC 1 C/O New installations; higher current and wider voltage range In stock at most authorized distributors
A9A26914 2 mA–100 mA 24 VAC–250 VAC, 24–220 VDC 1 C/O Low-current sensitive monitoring circuits and electronics In stock; specialized use case

If your signaling load exceeds what the A9A26924 supports, or if you are specifying a new build rather than a retrofit, the A9A26904 is the manufacturer-recommended path — check current availability for all variants at LeadTime.ca.

Expert Verdict: Is the A9A26924 Still Worth Ordering?

The A9A26924 earns its place in one specific scenario: you have an established Acti 9 panel, a failed or missing signaling contact, and a constraint — space, budget, or compatibility — that makes a drop-in replacement the most practical solution. Its 9 mm width, direct mechanical compatibility with the full Acti 9 range including iC60, iDPN Vigi, iID, iSW, iSW-NA, ARA, RCA, and iC40, and its proven operation across 24 VDC to 415 VAC make it the right answer for maintenance technicians, system integrators managing legacy installations, and panel builders working within a defined footprint. Compliance with EN/IEC 60947-5-1 and a pollution degree 3 rating mean it is not a residential-only component — it is rated for industrial environments with dust and contamination present, and tropicalization level 2 covers high-humidity and tropical climates.

Where the A9A26924 falls short is in forward-looking specification work. Schneider Electric discontinued it as of June 1, 2024, and for any new installation that does not have a legacy compatibility requirement, the A9A26904 or A9A26914 are the correct choices. The A9A26904 handles a wider voltage range on both AC and DC sides and is the natural replacement for general-purpose signaling. The A9A26914 steps down to the 2 mA to 100 mA range for sensitive monitoring circuits where the A9A26924's minimum current threshold would cause problems. If your application is not a retrofit — or if the control circuit involves sensitive electronics — specify one of those two models instead and avoid a future sourcing headache when A9A26924 stock eventually drains from the market.

From a procurement standpoint, the discontinuation changes the calculus on sourcing strategy. Lead times on discontinued Schneider Electric components are distributor-inventory-dependent, not factory-dependent — which means a specialist distributor who actively stocks legacy Acti 9 accessories is significantly more reliable than a general-purpose online retailer who lists the part number without guaranteed inventory. A specialist can also confirm in advance whether the A9A26924 or one of its replacements is the right fit for your specific base device, eliminating the compatibility risk before anything ships. If you are managing a time-sensitive repair or retrofit, that pre-shipment verification is worth more than the lowest list price. View current stock status and pricing for the A9A26924 at LeadTime.ca, where we ship to customers worldwide.

For volume pricing on multiple units or to confirm lead time before committing to a build schedule, contact the LeadTime.ca team directly — we ship worldwide and can advise on replacement model availability if A9A26924 stock does not meet your timeline.

What Engineers Need to Know Before Ordering the A9A26924

The A9A26924 sits in a product category — auxiliary contacts for compact circuit breakers — where community forum discussions are sparse by nature. This is a mature, stable component type that has been part of the Acti 9 ecosystem since the platform was established, and engineers who have used it tend not to post questions about it because the engineering is well understood. What does surface, consistently, in specialist distributor conversations is a cluster of ordering mistakes that cost buyers time and project delay. Understanding these patterns before you place your order is the practical equivalent of community intelligence for this part.

The most common sourcing error is assuming that any auxiliary contact labeled for Acti 9 will share the same contact form. The A9A26924 is a 1 C/O (changeover) module — it provides both normally open and normally closed paths from a single device. Buyers who search generically for "Acti 9 auxiliary contact" sometimes receive a 2 C/O variant or a model with a different contact arrangement, only discovering the mismatch when the panel wiring does not match what the installed module provides. The fix is simple: specify the contact form — 1 C/O — explicitly in your purchase order and confirm it with the distributor before shipment.

The second pattern involves the discontinued status. Buyers who locate the A9A26924 through a general-purpose online retailer sometimes receive a confirmation of availability that turns out to reflect a catalog listing rather than physical stock. Given that the part was discontinued in June 2024, the remaining supply is entirely distributor-held inventory. A specialist distributor with active stock visibility can tell you immediately whether units are available or whether the A9A26904 is the faster path to getting your panel operational. When the timeline for a repair is measured in hours rather than weeks, that distinction matters. Consulting a specialist before committing to a source is the step that prevents a second delay on top of the original fault.

Wiring and Installation Overview

  • Confirm base device is an Acti 9 family model (iC60, iDPN Vigi, iID, iSW, iSW-NA, ARA, RCA, iC40) before mounting — the module will not clip correctly onto non-Acti 9 devices regardless of apparent size similarity
  • Verify 9 mm of clear horizontal DIN rail space is available; the module height is 86 mm and depth is 73 mm, so check enclosure depth as well
  • Strip exactly 10 mm of insulation from each signaling conductor — the screw clamp terminal requires this length for a secure grip; over-stripping or under-stripping causes either insulation trapped in the clamp or insufficient conductor contact
  • Tighten each screw clamp terminal to 1 N.m; if a calibrated torque screwdriver is not available, hand-tight plus one quarter turn is the accepted field approximation
  • After wiring, verify continuity with a multimeter before restoring panel power — manually trip the base device and confirm the contact changes state; if state does not change, recheck terminal tightness and wire insertion depth before energizing

Full installation and wiring procedures are detailed in the Schneider Electric product documentation. Engineers requiring complete step-by-step procedures should refer to the official Acti 9 auxiliary contact installation guide available from Schneider Electric's technical documentation portal.

Compatible Acti 9 Base Devices

The A9A26924 is confirmed compatible with the following Acti 9 family base devices. Compatibility is both mechanical (clip-on mounting) and functional (trip mechanism linkage). Always cross-reference the device nameplate model number against this list before ordering — visual similarity between circuit breaker families is not a reliable indicator of auxiliary contact compatibility.

  • iC60 — Standard miniature circuit breaker, Acti 9 range
  • iC60 RCBO — Residual current breaker with overcurrent protection, Acti 9 range
  • iC65 — Medium circuit breaker, Acti 9 range
  • iC40 — Compact circuit breaker, Acti 9 range
  • iDPN Vigi — Differential circuit breaker, Acti 9 range
  • iID — Time-delay circuit breaker, Acti 9 range
  • iSW — Standard switch, Acti 9 range
  • iSW-NA — Selector switch variant, Acti 9 range
  • ARA — Auxiliary relay, Acti 9 range
  • RCA — Remote control accessory, Acti 9 range

Wrong-Part Prevention Checklist Before Ordering the A9A26924

Run through every item on this checklist before submitting your purchase order. Each check corresponds to a documented ordering mistake that causes panel delays, returns, and rework.

  1. Verify compatibility with your exact Acti 9 base device model (iC60, iDPN Vigi, iID, iSW-NA, ARA, RCA, iC40) — incompatible bases will not accept this contact
  2. Confirm maximum signaling current requirement does not exceed 6 A at 24 VDC or 3 A at 415 VAC
  3. Check that control voltage is within range: 24 VDC to 415 VAC supported by A9A26924
  4. Verify that 1 changeover contact (1 C/O) layout matches your signaling circuit design (do not confuse with 2 C/O or multi-contact variants)
  5. Confirm DIN rail availability and 9 mm horizontal space in control panel enclosure
  6. Check if discontinued status impacts lead time or if replacement models (A9A26904 or A9A26914) meet your requirements instead
  7. Verify wire terminal capacity: accepts 0.5–4 mm² conductors with screw clamp (do not attempt to install oversized or undersized wires)
  8. Confirm operating temperature environment is within -35 to 70 °C range during normal operation

If any item on this checklist raises a question you cannot resolve from the datasheet alone, contact the LeadTime.ca team before ordering — we can verify compatibility against your specific base device and advise on replacement model availability if needed.

Frequently Asked Questions

Is the A9A26924 a direct mechanical fit for my iC60N without any adapter or bracket?

Yes — the iC60 is listed as a confirmed compatible base device for the A9A26924. The module clips directly onto the Acti 9 iC60 without an adapter. Verify that your device label reads iC60 (Acti 9 family) rather than a visually similar model from a different product line, as the clip-on mounting points are not universal across circuit breaker families.

Can the A9A26924 be used in a DC-only control circuit, such as a 24 VDC PLC input?

Yes. The A9A26924 supports AC and DC operation across the same voltage range. At 24 VDC, the rated current is 6 A — well above the input draw of a typical PLC digital input. Verify your PLC input's source current against the contact rating; in practice, PLC digital inputs draw milliamps, placing them well within the contact's capacity at that voltage.

My signaling load is a 10 A solenoid valve coil — will the A9A26924 handle it?

No. The maximum rated current for the A9A26924 is 6 A at 24 VDC and 3 A at 415 VAC. A 10 A inductive load exceeds the contact rating at any supported voltage, and operating beyond this limit causes contact degradation, welding, or failure to respond to trip events. For loads exceeding 6 A, use an intermediate relay to buffer the contact output, or specify the A9A26904, which shares the same 6 A maximum but offers the improved voltage range and current floor suited to new designs.

How do I distinguish between the normally open and normally closed terminals on the A9A26924?

Terminal identification follows the 1 C/O changeover contact diagram in the Schneider Electric product datasheet. The common (C), normally open (NO), and normally closed (NC) terminals are labeled on the module body. Before energizing, confirm your circuit is connected to the correct terminal pair using a multimeter in continuity mode — with the base device in closed position, the NC path should show continuity and the NO path should show open circuit.

Since the A9A26924 is discontinued, will I face compatibility issues with the A9A26904 replacement?

The A9A26904 is compatible with the same Acti 9 base devices and shares the 1 C/O contact form, so it is a functional replacement in most existing panel layouts. The key difference is the current and voltage range: the A9A26904 accepts loads from 100 mA to 6 A across 24 VAC to 415 VAC and 24–220 VDC, giving it broader flexibility than the A9A26924. Verify that your signaling circuit's current falls within the A9A26904's rated range before substituting, particularly at the low end if you have a very low-current monitoring circuit.

What does the IP20 / IP40 rating mean for panel installation planning?

IP20 applies to the screw clamp terminals — they are protected against solid objects larger than 12 mm but are not finger-safe in the traditional sense, so the terminals must be installed inside a suitable enclosure. IP40 applies to the module body when installed within that enclosure, meaning the housing is protected against solid objects larger than 1 mm. This rating profile is standard for DIN rail auxiliary contact modules and is appropriate for installation in closed control panel enclosures as intended by the Acti 9 system design.

Why Order the A9A26924 Through LeadTime.ca

  • Global shipping — LeadTime.ca ships the A9A26924 and its replacement models worldwide, not limited to any single country or region
  • Legacy component sourcing — specialist focus means active stocking of discontinued and hard-to-find Acti 9 accessories, not just current catalog items
  • Compatibility verification before shipment — technical staff can confirm your base device against the Acti 9 compatibility list before your order ships, eliminating the most common ordering mistake
  • Replacement model advisory — if A9A26924 stock does not meet your lead time requirement, we can immediately advise on A9A26904 or A9A26914 as drop-in alternatives
  • Volume and project pricing — contact for current pricing on multi-unit orders or project BOMs

At-a-Glance Summary: Schneider A9A26924

  • Official product name: Acti 9 - Auxiliary contact iOF - 1 C/O - AC/DC
  • Contact form: 1 C/O (changeover) — provides both normally open and normally closed paths from a single 9 mm module
  • Rated current: 6 A at 24 VDC and 240 VAC; 3 A at 415 VAC
  • Operating voltage range: 24 VDC to 415 VAC
  • Rated insulation voltage: 500 V; impulse withstand: 4 kV
  • Operating temperature: -35 to +70 °C; storage: -40 to +85 °C
  • Module dimensions: 9 mm wide × 86 mm high × 73 mm deep; weight 32 g
  • Terminal wire acceptance: 0.5–4 mm² screw clamp; strip length 10 mm; torque 1 N.m
  • Protection: IP20 terminals / IP40 enclosure; pollution degree 3; tropicalization level 2
  • Standards: EN/IEC 60947-5-1
  • Compatible base devices: iC60, iC60 RCBO, iC65, iC40, iDPN Vigi, iID, iSW, iSW-NA, ARA, RCA (Acti 9 family only)
  • Product status: Discontinued June 1, 2024 — replacement models A9A26904 and A9A26914 recommended for new installations

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