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Schneider Electric G12F4A40 — Miniature Circuit Breakers (MCB)

Schneider Electric G12F4A40 GoPact MCCB 125, 40A 4P 30kA

MPNG12F4A40
Active

Schneider Electric GoPact MCCB 125, 4-pole, 40 A thermal-magnetic (TM-D) trip unit, 30 kA breaking capacity at 415 V AC, screw terminals, IP20, grey RAL 7035.

$108.39Ref. price · indicative, final on quote
Schneider Electric G12F4A40 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

G12F4A40 — Identification
ParameterValue
Product nameGoPact MCCB 125
Product range (series)GoPact MCCB
Product/component typeCircuit breaker
Device applicationDistribution
G12F4A40 — Ratings
ParameterValue
Rated current (In)40 A at 40 °C
Poles configuration4P
Rated operational voltage (Ue)415 V AC 50/60 Hz conforming to EN/IEC 60947-2
Rated insulation voltage (Ui)440 V AC conforming to EN/IEC 60947-2
Rated impulse withstand voltage (Uimp)6 kV conforming to EN/IEC 60947-2
Utilisation categoryCategory A
Overvoltage categoryIII
G12F4A40 — Protection
ParameterValue
Trip unit technologyThermal-magnetic
Suitability for isolationYes conforming to EN/IEC 60947-2
Electrical durability (cycles)8000 cycles at 415 V In
Mechanical durability (cycles)30000 cycles
G12F4A40 — Mechanical
ParameterValue
Mounting supportBackplate
Control typeToggle
G12F4A40 — Environmental
ParameterValue
Operating ambient temperature-20...55 °C
Storage ambient temperature-35...85 °C
IP degree of protectionIP20 conforming to IEC 60529
Pollution degree3 conforming to IEC 60664-1
G12F4A40 — Approvals
ParameterValue
StandardsEN/IEC 60947-1 EN/IEC 60947-2 EN/IEC 60947-2 Annex H
G12F4A40 — Electrical
ParameterValue
[Icu] rated ultimate short-circuit breaking capacity30 kA Icu at 380/415 V AC 50/60 Hz conforming to EN/IEC 60947-2 50 kA Icu at 220/230 V AC 50/60 Hz conforming to EN/IEC 60947-2
[Ics] rated service short-circuit breaking capacity15 kA at 380/415 V AC 50/60 Hz conforming to EN/IEC 60947-2 25 kA at 220/230 V AC 50/60 Hz conforming to EN/IEC 60947-2
G12F4A40 — Specifications
ParameterValue
[Ir] long-time protection pick-up adjustment range0.8...1 x In
Trip unit protection functionsLI

Product details

40 A, 4-pole, 30 kA — the GoPact MCCB 125 for distribution panels

The Schneider Electric G12F4A40 is a GoPact MCCB 125 with a 40 A TM-D trip unit, 4 poles, and 30 kA breaking capacity at 415 V AC. This is the standard thermal-magnetic curve for distribution — no electronic adjustment, no ground-fault module.

Fixed backplate mounting, screw terminals front-connected on both sides. Width 100 mm, height 130 mm, depth 60 mm. The toggle handle protrudes from the front face;

Overvoltage category III — suitable for fixed-installation distribution boards downstream of the service entrance. Electrical endurance is 8000 cycles at rated current and 415 V; mechanical endurance is 30000 cycles. Power dissipation per pole is 18.7 W at rated current.

Frequently asked questions

What trip unit does G12F4A40 use?

A TM-D thermal-magnetic trip unit with LI protection — thermal overload (L) and magnetic short-circuit (I). It is fixed, non-interchangeable, and rated 40 A at 40 °C.

MPN
G12F4A40