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Schneider Electric A9Z25240 — Residual Current Breakers (RCCB/RCBO)

Schneider Electric A9Z25240 Acti9 iID RCCB, 40 A, 300 mA, Ty

MPNA9Z25240
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Schneider Electric Acti9 iID, residual current circuit breaker (RCCB), 2P, 40 A, 300 mA, Type A, selective, 10 kA, DIN rail.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

A9Z25240 — Residual Current Protection
ParameterValue
Earth-leakage sensitivity (IΔn)300 mA
Earth-leakage protection class / typeType A
Earth-leakage trip time delaySelective
Residual-current tripping technologyVoltage independent
A9Z25240 — Electrical Ratings
ParameterValue
Rated current (In)40 A
Rated operational voltage (Ue)220...240 V AC 50/60 Hz
Poles description2P
Neutral pole positionLeft
Network typeAC
Network frequency50/60 Hz
Rated insulation voltage (Ui)500 V AC 50/60 Hz
Rated impulse withstand voltage (Uimp)6 kV
Electrical durabilityAC-1: 15000 cycles
Mechanical durability (operating cycles)20000 cycles
A9Z25240 — Identification
ParameterValue
Product nameActi9 iID
Product / component typeResidual current circuit breaker (RCCB)
Product range / familyActi9
Device short nameiID
A9Z25240 — Mechanical
ParameterValue
Mounting supportDIN rail
Mounting modeClip-on
Control typeToggle
Width in 9 mm modules4
Terminal connectionsDouble terminal front 1...35 mm² rigid Double terminal front 1...25 mm² flexible Double terminal front 1...25 mm² flexible with ferrule Double terminal back 1...25 mm² rigid Double terminal back 1...16 mm² flexible Double terminal back 1...16 mm² flexible with ferrule
Wire stripping length14 mm for top or bottom connection
Terminal tightening torque3.5 N.m top or bottom
Width36 mm
Height91 mm
Depth73 mm
A9Z25240 — Environmental
ParameterValue
Operating ambient temperature-25...60 °C
Storage ambient temperature-40...85 °C
IP degree of protectionIP20 conforming to IEC 60529 IP40 (modular enclosure) conforming to IEC 60529
Pollution degree3
A9Z25240 — Approvals
ParameterValue
StandardsEN/IEC 61008-1 EN/IEC 61008-2-1

Product details

Rated 40 A continuous with a 300 mA earth-leakage sensitivity, Type A protection means it catches sinusoidal AC faults plus pulsating DC faults, which covers most modern electronics and variable-speed drives. The selective time delay is the key fit detail: it holds through short-duration earth faults so the downstream RCCB trips first, keeping the upstream supply live for the rest of the board. That coordination matters when you're feeding multiple sub-distribution boards off one main RCCB.

Neutral on the left. IP20 body, IP40 inside a modular enclosure — fine for dry indoor panels, not for washdown. Tightening torque 3.5 N.m top or bottom.

Rated impulse withstand voltage 6 kV, conditional short-circuit current 10 kA.

Frequently asked questions

What is the difference between Type A and Type AC RCCBs, and why does this one specify Type A?

Type A detects both sinusoidal AC residual currents and pulsating DC residual currents, while Type AC detects only sinusoidal AC. Type A is required where loads like variable-speed drives, switching power supplies, or LED drivers can generate pulsating DC fault currents that a Type AC device would miss. The A9Z25240 is Type A, so it covers those modern loads.

What does 'selective' time delay mean for coordination?

Selective means the RCCB is intentionally delayed — typically 40–150 ms — so that a downstream RCCB or RCBO trips on a fault before this one does. This keeps the upstream supply live for the rest of the distribution board, limiting the outage to the affected sub-circuit. It's the standard choice for the incoming or main RCCB position in a multi-board installation.

Where can I buy A9Z25240?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commitment.

MPN
A9Z25240