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Schneider Electric G12T4A125 — Miniature Circuit Breakers (MCB)

Schneider Electric G12T4A125 GoPact MCCB 125, 4P, 10 kA at 4

MPNG12T4A125
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Schneider Electric GoPact MCCB 125, 4P, 125 A, TM-D trip unit, 10 kA at 415 V AC, thermal-magnetic, screw terminals, IP20.

$129.13Ref. price · indicative, final on quote
Schneider Electric G12T4A125 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

G12T4A125 — Identification
ParameterValue
Product nameGoPact MCCB 125
Product range (series)GoPact MCCB
Product/component typeCircuit breaker
Device applicationDistribution
G12T4A125 — Ratings
ParameterValue
Rated current (In)125 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
G12T4A125 — Protection
ParameterValue
Trip unit technologyThermal-magnetic
Suitability for isolationYes conforming to EN/IEC 60947-2
Electrical durability (cycles)5000 cycles at 415 V In
Mechanical durability (cycles)30000 cycles
G12T4A125 — Mechanical
ParameterValue
Mounting supportBackplate
Control typeToggle
G12T4A125 — 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
G12T4A125 — Approvals
ParameterValue
StandardsEN/IEC 60947-1 EN/IEC 60947-2 EN/IEC 60947-2 Annex H
G12T4A125 — Electrical
ParameterValue
[Icu] rated ultimate short-circuit breaking capacity10 kA Icu at 380/415 V AC 50/60 Hz conforming to EN/IEC 60947-2 20 kA Icu at 220/230 V AC 50/60 Hz conforming to EN/IEC 60947-2
[Ics] rated service short-circuit breaking capacity10 kA at 380/415 V AC 50/60 Hz conforming to EN/IEC 60947-2 20 kA at 220/230 V AC 50/60 Hz conforming to EN/IEC 60947-2
G12T4A125 — Specifications
ParameterValue
[Ir] long-time protection pick-up adjustment range0.8...1 x In
Trip unit protection functionsLI

Product details

What it is and what it does

The Schneider Electric G12T4A125 is a GoPact MCCB 125 — a 4-pole molded-case circuit breaker with a 125 A thermal-magnetic TM-D trip unit. It protects distribution circuits against overload (thermal) and short-circuit (magnetic), rated 125 A at 40 °C and breaking 10 kA at 380/415 V AC (category A, per EN/IEC 60947-2). The 10 kA SCCR means it safely interrupts faults up to that level without cascading upstream — a key number for panel coordination studies.

Mounting and integration

Mounts fixed to a backplate (not DIN rail), with front-facing screw terminals for both line and load connections. The 25 mm pole pitch matches standard busbar spacing. IP20 finger-safe protection means it's suitable for enclosed panel mounting where operators won't contact live parts during normal operation. Pollution degree 3 (IEC 60664-1) covers industrial environments with conductive dust or condensation.

Lifecycle and sourcing

Listed as current production. Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time.

Frequently asked questions

What are the key ratings for G12T4A125?

125 A rated current at 40 °C, 10 kA breaking capacity at 380/415 V AC, 4 poles, thermal-magnetic TM-D trip unit with LI protection (overload and short-circuit).

What compliance documentation does this brand provide for G12T4A125?

The breaker is certified to EN/IEC 60947-1, EN/IEC 60947-2, and EN/IEC 60947-2 Annex H. Isolation suitability is confirmed per EN/IEC 60947-2.

MPN
G12T4A125