Skip to main content
Log in
Schneider Electric G12F3A40 — Miniature Circuit Breakers (MCB)

Schneider Electric G12F3A40 GoPact MCCB 125, 40 A, 3P, TM-D,

MPNG12F3A40
Active

Schneider Electric GoPact MCCB 125, 3-pole, 40 A, TM-D thermal-magnetic trip unit, 30 kA breaking capacity at 415 V AC, fixed mount, screw terminals, IP20.

$85.64Ref. price · indicative, final on quote
Schneider Electric G12F3A40 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

G12F3A40 — Identification
ParameterValue
Product nameGoPact MCCB 125
Product range (series)GoPact MCCB
Product/component typeCircuit breaker
Device applicationDistribution
G12F3A40 — Ratings
ParameterValue
Rated current (In)40 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
G12F3A40 — 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
G12F3A40 — Mechanical
ParameterValue
Mounting supportBackplate
Control typeToggle
G12F3A40 — 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
G12F3A40 — Approvals
ParameterValue
StandardsEN/IEC 60947-1 EN/IEC 60947-2 EN/IEC 60947-2 Annex H
G12F3A40 — 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
G12F3A40 — Specifications
ParameterValue
[Ir] long-time protection pick-up adjustment range0.8...1 x In
Trip unit protection functionsLI

Product details

The G12F3A40 is a 3-pole GoPact MCCB 125 with a TM-D thermal-magnetic trip unit rated 40 A at 40 °C. The LI protection curve (thermal for overload, magnetic for short-circuit) is the standard for cable and busbar protection in distribution applications. Rated operational voltage is 415 V AC 50/60 Hz, with an insulation voltage of 440 V AC, both conforming to EN/IEC 60947-2. The utilisation category A means it is not intended for motor switching under load — it is a distribution breaker, not a motor starter protector.

Fixed mount on a backplate, with front-connect screw terminals on both line and load sides. The 25 mm connection pitch matches standard busbar systems. IP20 finger-safe protection on the front.

Frequently asked questions

Where can I buy G12F3A40 and how do I get a price?

The G12F3A40 is sourced to order against an RFQ through independent distribution. Submit a request for quote to confirm current availability and pricing.

What is the breaking capacity of G12F3A40?

The G12F3A40 has a breaking capacity of 30 kA at 380/415 V AC (performance level F), conforming to EN/IEC 60947-2.

What compliance standards does G12F3A40 meet?

The G12F3A40 conforms to EN/IEC 60947-1, EN/IEC 60947-2, and EN/IEC 60947-2 Annex H. It is suitable for isolation per EN/IEC 60947-2 and carries IP20 protection per IEC 60529.

MPN
G12F3A40