Schneider Electric A9Z61425 Acti9 iID 4P 25 A 30 mA B-SI RCCB

A9Z61425: Acti9 iID 4P 25 A 30 mA type B-SI RCCB

The A9Z61425 is a Schneider Electric Acti9 iID residual current circuit breaker with 4 poles, a rated current of 25 A, a sensitivity of 30 mA and an earth-leakage protection class of type B-SI (Super Immunised). Type B covers smooth DC residual current as well as the waveforms of types A and AC, which is why this reference is listed by the datasheet for photovoltaic, three-phase speed drive and lift applications. Seven Star LLC supplies the A9Z61425 in Oman and the GCC as an independent supplier based in Muscat.

The reference is not decoded by the datasheet, so rely on the parameters on this page: 4P, 25 A, 30 mA, 400 V AC at 50 Hz and type B-SI. It is wider than the single-phase A9R devices, at 72 mm for 8 modules of 9 mm, and deeper at 73 mm.

Indicators and operation of the A9Z61425

The front carries the toggle with ON/OFF indication, a contact position indicator, a green LED showing that voltage is present and a trip indicator. The LED matters because a type B device needs supply to monitor smooth DC leakage in its electronics, while the tripping itself is listed as voltage independent. The datasheet does not describe the exact behaviour on loss of supply, so consult the manufacturer instructions for that.

The front also has a regular-test button. Press it after commissioning and then at the interval your maintenance plan sets; the toggle must be reset by hand after a trip.

Why type B-SI matters for the A9Z61425

Standard RCCBs of type AC and type A do not reliably detect smooth DC residual current. Equipment such as three-phase variable speed drives, photovoltaic inverters and lift controllers can produce that kind of fault current, and a DC component can also magnetise the core of a lower-class device and blind it to ordinary AC faults. The datasheet therefore lists this unit for photovoltaic, 3P speed drive and lift use, with type B-SI protection.

The SI marking means Super Immunised. The datasheet lists an 8/20 µs impulse withstand of 3 kA, tested to EN/IEC 61008-1, and an overvoltage category of IV. Those values relate to resistance against surge-induced nuisance tripping, though the manufacturer’s own test report is the place to confirm anything beyond what the datasheet states.

Technical specifications of the A9Z61425

Selection checklist for the A9Z61425

• Supply: 400 V AC, 50 Hz, three phases and neutral.
• Load current: not above 25 A through the device, with a short-circuit device upstream.
• Fault waveform: type B-SI for loads that can generate smooth DC residual current, such as drives and PV inverters.
• Sensitivity: 30 mA for the role of the stage, personal, fire-risk or upstream discrimination.
• Space: 8 modules, 72 mm of rail, 73 mm deep.
• Terminals: double terminals, with a screw shield supplied.

Ratings and environment of the A9Z61425

The datasheet lists 25 A rated current, 500 V insulation voltage, 6 kV impulse withstand, pollution degree 3 and 20000 mechanical and 15000 electrical cycles. Operating temperature is -25 to 60 °C and storage is -40 to 85 °C, with operation up to 2000 m altitude. Protection is IP20 on the device, IP40 in a modular enclosure and IK05 against impact.

Photovoltaic and drive panels in Oman often run hot, so allow spacing from inverters, chokes and large contactors. The listed 60 °C is an ambient figure for the device, and the air inside a closed board can be well above room temperature.

Typical uses of the A9Z61425 in Oman and the GCC

In the region this unit is a candidate for desalination auxiliaries, workshop machinery boards and variable speed drives on pumps and fans, where plain type A protection may not cover the DC content of the fault. Solar plants, pumping stations and buildings with lifts are the obvious fits. The final choice of RCD type is normally set by the equipment manufacturer and the project specification, so confirm it before ordering.

Sensitivity and discrimination: 30 mA on the A9Z61425

With 30 mA and no delay, the A9Z61425 acts as a final-stage device for personal protection.

The table below places the A9Z61425 among the seven type B-SI references in this range. The 30 mA devices suit the protection of people, the 300 mA instantaneous devices suit fire-risk protection, and the 300 mA S devices are the upstream partners that allow discrimination.

Information to send with an RFQ for the A9Z61425

• Exact reference A9Z61425 and the quantity needed.
• Application, for example PV, drive or lift, and the equipment manufacturer’s RCD requirement.
• Supply voltage and earthing system.
• Upstream protective device and its rating.
• Whether discrimination with 30 mA stages below is required.
• Delivery location and timeline.

Before ordering, check that the board enclosure, busbar arrangement and neighbouring devices leave enough room for heat to escape, since crowded boards in hot rooms run closer to their limits than the rated ambient suggests.

Keep a record of the installed ratings on the board schedule and note the supply voltage at commissioning, because later extensions and fault investigations depend on knowing exactly what protects each circuit.

Documents and quotation

The Schneider Electric datasheet for the A9Z61425 is attached on this page and holds the full specification summarised above. It is dated 8 Nov 2026 as printed on the manufacturer’s document.

Send us the reference A9Z61425, quantity and delivery location and Seven Star LLC will reply to your request. We supply as an independent supplier based in Muscat and do not act for the manufacturer.