Schneider A9A26929 — Specs, Replacement & Availability

By Abdullah Zahid
15 min read
Schneider A9A26929 Acti 9 iOF/SD+OF 2OC auxiliary contact mounted on DIN rail beside iC60 circuit breaker

Schneider A9A26929 Auxiliary Contact, Acti9, iOF/SD+OF, 2OC, AC/DC — Specifications, Compatibility, and Replacement Guide

If you are searching for the Schneider A9A26929 auxiliary contact, you are almost certainly doing one of two things: validating a legacy specification on an existing Acti 9 cabinet, or scrambling to replace a failed unit before a production line goes down. Either way, there is one fact you need upfront — the A9A26929 is discontinued, with regional end-of-service dates ranging from December 2023 to February 2024, and remaining stock is limited and depleting. This DIN rail-mounted dual changeover contact (2 C/O) provides open, closed, and fault state signaling from Acti 9 circuit breakers, RCBOs, and residual current devices to PLCs and monitoring systems, rated from 1 A at 130 VDC to 6 A at 24 VDC and up to 3 A at 415 VAC.

If you have already confirmed this is the correct part for your application, check current stock status and availability at LeadTime.ca — we ship worldwide and can verify inventory in writing before you commit to a purchase order.

Who Should Order the A9A26929 — and Who Should Not

This part is the right choice if your application meets all of the following criteria:

  • Your host device is a confirmed compatible Acti 9 model — iC60, iC60N, iC60H, iC60 RCBO, iC65, iCV40, iC40, iID, iID40, iDPN Vigi, RCA, ARA, or iSW-NA
  • Your application requires exactly two changeover (2 C/O) signal contacts — not one, not four
  • Your control voltage and current fall within rated combinations: 6 A at 24 VDC, 2 A at 48 VDC, 6 A at 240 VAC, or 3 A at 415 VAC (see full table below)
  • Your installation uses 9 mm pitch DIN rail mounting and your enclosure has space for a 9 mm wide, 90 mm tall, 73 mm deep module
  • Your wiring is 0.5–2.5 mm² flexible or 1–4 mm² rigid — within screw clamp terminal limits
  • You have confirmed in writing that a distributor has physical stock on hand with a specific ship date

If you are designing a new system, or if your current search is being driven by discontinued stock notices, do not specify the A9A26929 for new builds. The A9A26909 covers the same 100 mA to 6 A general-purpose range and offers equivalent Acti 9 compatibility. The A9A26919 is the correct choice if your application requires lower signal currents in the 2 mA to 100 mA range. Both are current-generation parts with long-term support.

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What the A9A26929 Actually Does in Your System

The Schneider A9A26929 is not a primary protection device — it is a secondary monitoring add-on that attaches to an existing Acti 9 circuit breaker or residual current device to report that device's state to an external control system. When the host breaker opens on a fault, closes under normal operation, or trips on residual current, the A9A26929 translates that mechanical state into two independent electrical signals via its 2 C/O (changeover) contact pairs. Each contact pair operates as a single-pole double-throw (SPDT) switch that can feed a PLC digital input, a monitoring relay, an alarm annunciator, or an interlock circuit.

The integral mechanical indicator on the A9A26929 provides local visual confirmation of the device state — useful in cabinets where field technicians need to verify breaker position without consulting a SCADA screen. This is a hardware-level feature with no wiring required and no additional components needed. The unit mounts on a standard DIN rail at 9 mm pitch, occupying only 9 mm of panel width, which keeps it a practical fit even in densely populated distribution boards. Its insulation voltage of 4 kV and operating temperature range of -35 to +70°C make it suitable for industrial environments where control panels face temperature variation and transient voltage exposure.

Across the Acti 9 product family, the A9A26929 has historically served as the general-purpose middle-range auxiliary contact — rated up to 6 A at 24 VDC, which covers the vast majority of PLC input card and monitoring relay requirements. Its compatibility span of 10 or more Acti 9 device families, confirmed in official Schneider datasheets, made it the default specification choice for engineers building monitoring capability into Acti 9-based distribution boards over the past decade.

Where This Part Sits in a Typical Control Architecture

The A9A26929 sits between the primary protection device and the monitoring layer of your control system, converting a mechanical breaker state into an electrical signal that logic and supervisory systems can read.

  • PLC or DCS controller — receives digital input signal from auxiliary contact, executes interlock or alarm logic
  • Monitoring relay or alarm annunciator — wired to one changeover pair for fault annunciation
  • A9A26929 auxiliary contact — mounted on DIN rail adjacent to host device; mechanically coupled; converts breaker state to two SPDT electrical outputs
  • Host Acti 9 protection device (e.g., iC60N, iID, iDPN Vigi) — primary switching and protection element; drives auxiliary contact mechanically
  • Downstream load (motor, circuit, protected equipment) — switched and protected by the host device

Typical Applications and Deployment Scenarios

Motor control centers are the most common deployment environment for the A9A26929. When an iC60N breaker protects a motor feeder, the auxiliary contact gives the PLC continuous open/closed status — enabling soft-start permissive logic, automatic restart inhibit after a trip, and remote fault annunciation without adding discrete sensors to the cabinet.

On distribution boards in manufacturing facilities and water treatment plants, the A9A26929 is wired to alarm systems to signal a residual current device trip on a critical circuit. A fault on an iID or iDPN Vigi device immediately drives the auxiliary contact, triggering an alarm in the plant SCADA system before a technician is even aware of the outage.

In machine safety interlock circuits, the A9A26929 confirms breaker closed position before the machine controller permits downstream equipment to start. This is a hardwired permissive check using the changeover contact pair — a straightforward and reliable implementation that has been standard in European and North American panel building practice for the Acti 9 era.

Legacy retrofit is now the most urgent use case. Plants running aging Acti 9 cabinets — installed 5 to 15 years ago — that experience a failed A9A26929 face a sourcing race. The part is discontinued, stock is finite, and the alternative models require compatibility verification before installation.

Application Typical Deployment
Motor control center breaker monitoring A9A26929 on iC60N feeder; one C/O pair to PLC input, one to fault lamp
Distribution board RCD trip alarm Mounted on iID or iDPN Vigi; changeover contact wired to SCADA alarm input
Machine safety interlock Breaker closed confirmation via C/O contact; hardwired to safety relay permissive input
Redundant power supply monitoring Dual C/O pairs used for two independent monitoring channels on separate control systems
Legacy cabinet retrofit Like-for-like replacement on existing Acti 9 iC40 or iC65 installation; no wiring changes if A9A26929 stock is confirmed
HVAC panel status monitoring iSW-NA or iCV40 with A9A26929 providing open/closed feedback to building management system

Purchase-Decision Specifications and Variant Comparison

Parameter Value
Contact configuration 2 C/O (two independent changeover pairs)
Rated current at 24 VDC 6 A
Rated current at 48 VDC 2 A
Rated current at 240 VAC (50/60 Hz) 6 A
Rated current at 415 VAC (50/60 Hz) 3 A
Insulation voltage 4 kV
Operating temperature -35 to +70°C
Dimensions (H x W x D) 90 mm x 9 mm x 73 mm
Terminal type / torque Screw clamp / 1 N.m maximum
DIN rail pitch 9 mm (fixed mount)

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

Model Contact Config Current Range Best Use Case Status
A9A26929 (this unit) 2 C/O 1 A @ 130 VDC to 6 A @ 24 VDC General-purpose dual signaling on legacy Acti 9 installations Discontinued — limited stock
A9A26919 2 C/O 2 mA to 100 mA (low current) Sensitive dry-contact or low-current PLC input applications Current generation
A9A26909 2 C/O 100 mA to 6 A (general range) Drop-in replacement for most A9A26929 applications Current generation — recommended for new projects

If your application requires the full 6 A at 24 VDC rating and you cannot source the A9A26929 with a confirmed ship date, the A9A26909 is the appropriate current-generation alternative — contact the team at LeadTime.ca to verify availability of both models.

Expert Verdict: Legacy Replacement or Time to Migrate?

The Schneider A9A26929 has a straightforward engineering profile: a compact, reliable dual changeover auxiliary contact with a wide compatibility span across more than 10 Acti 9 device families, a useful operating temperature range of -35 to +70°C, and an insulation voltage of 4 kV that suits industrial control environments. For the automation engineer or maintenance technician managing an existing Acti 9 cabinet, this part does exactly what it needs to do — it converts a breaker mechanical state into two independent electrical signals with a local visual indicator, and it does so within the 9 mm pitch DIN rail footprint your panel was designed around. The buyer profile this part is right for is narrow but specific: operations teams running legacy Acti 9 systems aged 5 to 15 years, retrofit integrators under service contracts that prohibit redesign, and maintenance departments where a failed unit is blocking commissioning or causing a production hold.

Where this part has real limits is everywhere outside that legacy replacement scenario. The discontinuation timeline — regional end-of-service dates from December 2023 to February 2024 — means this is not a part you can build a procurement strategy around. Stock is finite and depleting globally. If your application uses low-current control signals in the 2 mA to 100 mA range, the A9A26919 is the technically correct and currently available replacement. If your application sits in the general-purpose 100 mA to 6 A range — which covers most PLC digital inputs and standard monitoring relays — the A9A26909 is the drop-in alternative with equivalent Acti 9 compatibility and long-term support. For any new project with a 10-year or longer lifecycle expectation, specifying the A9A26929 today introduces supply risk with no engineering benefit. Migrate to the current-generation models before a future failure forces the decision under time pressure.

From a procurement standpoint, the single most important action before raising a purchase order for the A9A26929 is written confirmation from your distributor that physical stock is in hand and a specific ship date is committed — not an estimated lead time, not a sourcing promise. This is not a standard availability check; it is a non-negotiable requirement given the discontinued status. Specialist distributors maintain tighter visibility into end-of-life inventory than generalist platforms, and they can accelerate the compatibility cross-reference to current-generation alternatives when stock is absent. Check current stock status for the A9A26929 at LeadTime.ca — we ship worldwide and can confirm inventory in writing before your project timeline is committed.

For volume requirements or to discuss migration to the A9A26909 or A9A26919 for an active project, contact the LeadTime.ca team directly — we source industrial automation components globally and can advise on the fastest path to confirmed delivery.

What Engineers Need to Know Before Ordering the A9A26929

Because community forum discussions on the A9A26929 are essentially absent — auxiliary contacts are passive signal components that rarely generate troubleshooting threads — the most valuable pre-order intelligence comes from understanding the failure patterns that appear during legacy transitions, not from peer reviews. The discontinuation of the A9A26929 has created a specific category of ordering error that is worth addressing directly.

The most common mistake in this product's end-of-life phase is selecting the A9A26919 as a replacement without verifying current ratings. Buyers see that both models are 2 C/O Acti 9 auxiliary contacts and assume electrical equivalence. They are not equivalent. The A9A26919 is rated for 2 mA to 100 mA — a low-current signaling device. If your PLC input card or monitoring relay draws a signal current above 100 mA at your control voltage, the A9A26919 is the wrong part. The correct general-purpose replacement is the A9A26909, which matches the A9A26929's 100 mA to 6 A range. Calculate your actual control signal current from the receiving device's datasheet before choosing between replacement models.

A second mistake is assuming that any current Acti 9 auxiliary contact will mount correctly on any Acti 9 host device. Mechanical coupling varies across device families. The compatibility matrix confirms which host device models are listed as compatible with the A9A26929 — iC60, iC40, iC65, iCV40, iID, iID40, iDPN Vigi, RCA, ARA, iSW-NA, and the iDPN China version. If your host device is not on that list, do not order without first contacting Schneider technical support or a specialist distributor with the specific model number. A mismatch produces intermittent or absent signal output, not an obvious installation failure. When community discussion is sparse and manufacturer documentation is the primary reference, working with a distributor that can access compatibility matrices and cross-reference replacement options directly is the practical alternative to forum advice. LeadTime.ca maintains access to current Schneider technical documentation and can answer compatibility questions before the purchase order is placed.

Wiring and Installation Overview

  • Confirm host device is powered off and locked out before mounting — verify absence of voltage with a calibrated multimeter before any wiring activity
  • Position the A9A26929 on the DIN rail immediately adjacent to the host Acti 9 device at 9 mm pitch; snap or slide until fully seated and verify there is no lateral movement
  • Strip each control signal wire to exactly 10 mm before inserting into screw clamp terminals — use the correct cable gauge (flexible 0.5–2.5 mm², rigid 1–4 mm²) and tighten to 1 N.m with a calibrated torque screwdriver
  • After wiring, restore power and manually operate the host device through open, closed, and trip states — observe the mechanical indicator on the A9A26929 and confirm the PLC or monitoring relay registers the expected signal on each state change
  • Test both changeover pairs if both are wired; document baseline operation including wired conductor gauge and torque setting on the installation record for future maintenance reference

Compatible Acti 9 Host Devices

The A9A26929 is confirmed compatible with the following Acti 9 device families per official Schneider Electric datasheets:

  • Acti 9 iC60, iC60N, iC60H — most common host device for this auxiliary contact
  • Acti 9 iC60 RCBO — residual current breaker with overcurrent protection
  • Acti 9 iC65 — higher-capacity circuit breaker variant
  • Acti 9 iCV40 — voltage-sensitive breaker
  • Acti 9 iC40 — older generation; confirmed compatible
  • Acti 9 iID, iID40 — instantaneous double-pole protective devices
  • Acti 9 iDPN Vigi — residual current monitoring device
  • Acti 9 RCA, ARA — legacy relay and interface devices
  • Acti 9 iSW-NA — selective switching interface
  • Acti 9 iDPN (China version) — regional variant; confirmed compatible

Wrong-Part Prevention Checklist Before Ordering the A9A26929

Before submitting a purchase order, verify every item on this checklist. Skipping any single step is the most common cause of delayed installations and incorrect part returns on discontinued Acti 9 accessories.

  1. Confirm the host device model (e.g., iC60N, iC60H, iC40N) is listed in the compatibility table in the datasheet
  2. Verify the control voltage matches one of the rated currents (e.g., 6 A @ 24 VDC, 3 A @ 415 VAC)
  3. Check that 2 changeover contacts (2 C/O) is the correct contact configuration needed
  4. Confirm 9 mm pitch and DIN rail mounting matches installation footprint
  5. Verify lead time and stock status with distributor — product is discontinued
  6. If replacement is required, identify the new model early (A9A26919 or A9A26909) and cross-check compatibility
  7. Check terminal type (screw clamp) and cable gauge capacity (0.5–4 mm² depending on terminal) matches field wiring

If any item on this checklist cannot be confirmed before ordering, contact the LeadTime.ca technical team — we can cross-reference compatibility, verify stock status in writing, and recommend the correct current-generation alternative if the A9A26929 is unavailable.

Frequently Asked Questions

The A9A26929 is shown as discontinued — can I still order it, and what is the realistic lead time?

The A9A26929 was discontinued on a rolling regional basis from May 2023 through October 2024, with end-of-service dates closing between December 2023 and February 2024 depending on region. Some distributor stock remains in circulation, but it is finite and unpredictable. There is no reliable lead time estimate available for this part; the only valid answer is a written stock confirmation from a distributor with physical units on hand. Do not commit a project timeline to an estimated or sourced lead time — confirm actual inventory before raising a purchase order.

Is the A9A26909 a direct drop-in replacement for the A9A26929 without rewiring the enclosure?

The A9A26909 covers the same 100 mA to 6 A general-purpose current range as the A9A26929 and shares the same 2 C/O contact configuration and Acti 9 compatibility. For the majority of installations where the A9A26929 was specified at 24 VDC or 240 VAC with standard PLC input wiring, the A9A26909 is the appropriate current-generation replacement. However, you must verify the A9A26909's rated current at your specific control voltage matches or exceeds your application requirement, and confirm mechanical compatibility with your specific host device model before installation — do not assume interchangeability without checking the replacement model's compatibility matrix.

What is the difference between the A9A26929 and the A9A26919, and how do I choose?

Both are 2 C/O Acti 9 auxiliary contacts, but their current ratings are fundamentally different. The A9A26919 is a low-current device rated for 2 mA to 100 mA — appropriate for sensitive dry-contact or solid-state PLC inputs operating at very low signal currents. The A9A26929 (and its replacement A9A26909) covers 100 mA to 6 A, which is the range required by conventional PLC digital input cards and standard monitoring relays. Selecting the A9A26919 for an application that draws more than 100 mA of signal current will result in a contact that cannot reliably carry the load. Calculate your actual control signal current from the receiving device's datasheet before choosing between these models.

What does the mechanical indicator on the A9A26929 show, and how do I read a fault condition?

The integral mechanical indicator provides a local visual display of the host Acti 9 device's state — it moves to reflect whether the host device is open, closed, or has tripped on a fault condition. Reading it requires no wiring or external power; it is a direct mechanical linkage from the host device through the auxiliary contact. During commissioning, manually operate the host device through its full range of states and observe that the indicator moves correspondingly at each position. If the indicator does not move when the host device changes state, the mechanical coupling between the auxiliary contact and the host device has not been fully engaged — recheck alignment and seating before concluding there is a fault.

Can I use two A9A26929 units on a single host device to get four changeover contacts?

The brief does not confirm multi-unit stacking capability for this specific model. Contact Schneider Electric technical support or consult the host device installation manual to determine whether the specific host device model supports more than one auxiliary contact accessory simultaneously. Do not assume stacking compatibility without manufacturer confirmation — mechanical coupling points vary across Acti 9 device families.

What happens if I exceed the 1 N.m terminal torque during installation?

The screw clamp terminals on the A9A26929 are rated to a maximum tightening torque of 1 N.m. Exceeding this value risks stripping the terminal screw or cracking the terminal block housing, which can result in intermittent contact failure or complete open-circuit of the wired signal. Use a calibrated torque screwdriver set to exactly 1 N.m — not a standard flat-blade screwdriver tightened by feel. If a terminal is damaged during installation, do not attempt field repair; the unit must be replaced, and given the discontinued status of the A9A26929, this makes correct first-installation torque more critical than on a readily available part.

Why Source the A9A26929 Through LeadTime.ca

  • Global shipping — LeadTime.ca fulfills orders worldwide, not limited to any single region or country
  • Written stock verification — for discontinued and end-of-life parts like the A9A26929, we confirm physical inventory and specific ship dates before purchase orders are committed
  • Replacement guidance — if the A9A26929 is unavailable, our team can cross-reference the A9A26909 and A9A26919 against your application parameters and confirm compatibility before you order a different variant
  • Access to technical documentation — compatibility matrices, terminal specifications, and datasheet cross-references are available through our team, not just through manufacturer websites
  • Volume and project pricing — contact us for current pricing on multi-unit requirements or active project builds

A9A26929 At-a-Glance Summary

  • Official product name: Auxiliary contact, Acti9, iOF/SD+OF, 2OC, AC/DC
  • Contact configuration: 2 C/O (two independent changeover pairs)
  • Rated current: 6 A at 24 VDC (maximum); 3 A at 415 VAC; 1 A at 130 VDC (minimum)
  • Insulation voltage: 4 kV
  • Dimensions: 90 mm H x 9 mm W x 73 mm D; weight 43 g
  • Operating temperature: -35 to +70°C; storage to +85°C
  • Terminal: screw clamp; wire strip 10 mm; torque 1 N.m maximum; flexible 0.5–2.5 mm², rigid 1–4 mm²
  • Compatible with 10+ Acti 9 device families including iC60, iC40, iC65, iID, iDPN Vigi, and iSW-NA
  • Discontinuation status: confirmed across multiple regions; end-of-service December 2023 to February 2024
  • Recommended current-generation replacements: A9A26909 (general-purpose range) and A9A26919 (low-current signaling)
  • Standards: EN/IEC 60947-5-1 compliant; RoHS compliant; Tropicalisation 2 rating at 95% relative humidity at 55°C

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