Schneider Electric A9N26948 Acti9 MX + OF shunt trip release

A9N26948: Acti9 MX + OF shunt trip release with a changeover (C/O) contact, 12–24 V

The A9N26948 is a Schneider Electric Acti9 MX + OF shunt trip release with a changeover (C/O) contact, an 18 mm side-mounted module that trips a compatible Acti9 breaker remotely when its coil is energised. Its control voltage is 12–24 V AC 50/60 Hz and 12–24 V DC. Seven Star LLC supplies the A9N26948 in Oman and the GCC as an independent supplier based in Muscat.

This unit is an accessory, not a breaker: it only works when mounted on a compatible Acti9 device, and it makes remote opening possible for emergency stop circuits, fire-alarm shutdown, process interlocks and monitored feeders. The OF part of the name is an additional C/O signalling contact, so the same module both trips the breaker and reports its state.

Technical specifications of the A9N26948

Breaker compatibility of the A9N26948

The datasheet lists these Acti9 ranges as compatible: iDPN, C120, C40, C60H-DC, C60NA-DC, C60PV-DC, DPN Vigi, DT40, DT60, ID C40, IDc, ITG40, ID, DPN. The C120 range is among them, which includes the A9N18346 and similar C120 breakers, but always check the exact breaker reference and its mounting side before you order. The module is fixed-mounted, takes the comb busbar at the top and mounts on the side of the breaker so that the pair occupies the breaker width plus 18 mm of rail.

Compatibility lists in a datasheet name the breaker families, not every pole count or rating, so confirm with the breaker datasheet that the shunt trip can be added on the chosen frame.

MX references to compare with the A9N26948

Related references in the same accessory family:

Wiring, testing and maintenance of the A9N26948

Connect the control wires to the bottom terminals: the datasheet lists one 2.5 mm² flexible conductor, with 9 mm stripping and 1 N.m torque. Make sure the supply type matches the coil: an AC coil must not be driven from a DC rail, and the polarity convention of DC control circuits should be checked against the wiring diagram supplied with the product.

After commissioning, test the trip by applying the control voltage once and confirming that the breaker opens and the indicator shows; repeat at each annual maintenance round. Check also that the C/O contact changes state and the PLC or alarm reads it. A shunt trip that never operates gives no feedback until it is needed, so a periodic test is the only way to know it works. Keep the coil circuit fuse or breaker rated per the manufacturer’s data.

Selection checklist and RFQ details for the A9N26948

Check these before ordering.

• Control voltage: 12–24 V AC 50/60 Hz and 12–24 V DC must match the signal supply.
• Auxiliary contact: required, with 1 C/O.
• Breaker: the exact reference must be listed as compatible.
• Mounting: one 18 mm slot to the side of the breaker.
• Signal source: relay, PLC output, push button or fire panel.

With your enquiry, send:

• Part number A9N26948 and quantity.
• The breaker reference it will be fitted to.
• Control supply type and voltage.
• Delivery location and date.

Where the A9N26948 is used in Oman and the GCC

Shunt trips are used in emergency stop and fire-alarm shutdown schemes of buildings and industrial plants, for remote isolation of feeders to pumps and chillers, and for load shedding on generator-backed boards. The OF version is also useful where a BMS or SCADA needs to know that the feeder was tripped by command and not by a fault. The temperature range of -25–50 °C suits indoor panels; on rooftop or plant-room boards in the Gulf the heat near the top of an enclosure can exceed that range, so mount the module away from heat sources.

What the A9N26948 does inside a breaker assembly

A shunt trip is a coil that sits beside a circuit breaker and, when energised by a command signal, releases the breaker mechanism. It does not protect the circuit by itself and it does not close the breaker again; the breaker handle must be reset manually afterwards. For this unit the coil is specified for 12–24 V AC 50/60 Hz and 12–24 V DC, so it follows the supply of the control circuit that triggers it. Because the control voltage is only 12–24 V, the trip can come directly from low-voltage PLC outputs, battery systems or SELV supplies without an interposing relay.

The C/O contact changes state when the module trips, so it can be wired to an alarm or a PLC input; the datasheet gives no contact rating for this low-voltage version, so use it only on low-energy signal circuits and confirm the rating with the manufacturer.

Documents and quotation

The manufacturer’s product datasheet for the A9N26948 is attached on this page for reference; it is the document to use when you verify ratings, dimensions and approvals against your own design. It lists the control voltage and compatibility for this exact reference.

To receive a quotation, send the part number A9N26948 with quantity and delivery location in Oman or the GCC. Seven Star LLC replies with availability and lead time as an independent supplier based in Muscat.