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Schneider Electric G12T3A50 — Miniature Circuit Breakers (MCB)

Schneider Electric G12T3A50 GoPact MCCB 125, 50 A, 3P, TM-D

MPNG12T3A50
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Schneider Electric GoPact MCCB 125, G12T3A50, 3P, 50 A at 40 °C, TM-D thermal-magnetic trip unit, 10 kA at 415 V AC, fixed mount, screw terminals, IP20.

$84.01Ref. price · indicative, final on quote
Schneider Electric G12T3A50 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

G12T3A50 — Identification
ParameterValue
Product nameGoPact MCCB 125
Product range (series)GoPact MCCB
Product/component typeCircuit breaker
Device applicationDistribution
G12T3A50 — Ratings
ParameterValue
Rated current (In)50 A at 40 °C
Poles configuration3P
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
G12T3A50 — 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
G12T3A50 — Mechanical
ParameterValue
Mounting supportBackplate
Control typeToggle
G12T3A50 — 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
G12T3A50 — Approvals
ParameterValue
StandardsEN/IEC 60947-1 EN/IEC 60947-2 EN/IEC 60947-2 Annex H
G12T3A50 — 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
G12T3A50 — Specifications
ParameterValue
[Ir] long-time protection pick-up adjustment range0.8...1 x In
Trip unit protection functionsLI

Product details

The Schneider Electric G12T3A50 is a GoPact MCCB 125 moulded-case circuit breaker, 3-pole, with a TM-D thermal-magnetic trip unit rated at 50 A at 40 °C. Rated operational voltage is 415 V AC at 50/60 Hz, with a breaking capacity of 10 kA at 380/415 V AC (performance level T).

Connection pitch is 25 mm, so it fits standard busbar systems. Dimensions: 75 mm wide, 130 mm high, 60 mm deep. The enclosure is grey (RAL 7035), IP20 finger-safe for the front face — once installed in a panel, the enclosure door provides the required IP rating.

Electrical endurance is 8,000 cycles at rated current and 415 V; mechanical endurance is 30,000 cycles. Power dissipation per pole is 18.7 W at rated load — factor that into your panel thermal budget if you're ganging multiple breakers.

Frequently asked questions

What is the breaking capacity of G12T3A50?

10 kA at 380/415 V AC, performance level T. That is the maximum fault current it can safely interrupt at those voltages.

What protection functions does the TM-D trip unit provide?

LI protection: thermal for overload (L) and magnetic for short-circuit (I). It is a fixed-trip thermal-magnetic unit — no interchangeable rating plugs.

Where can I buy G12T3A50 and get current pricing?

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 price and lead time.

What compliance documentation does Schneider provide for G12T3A50?

The breaker is certified to EN/IEC 60947-1, EN/IEC 60947-2, and EN/IEC 60947-2 Annex H. It is suitable for isolation per the same standard. RoHS and REACH declarations are standard for the GoPact range.

MPN
G12T3A50