Skip to main content
Log in
Schneider Electric G12F3F40 — Miniature Circuit Breakers (MCB)

Schneider Electric G12F3F40 GoPact MCCB 125, 40 A, 30 kA, 3P

MPNG12F3F40
Active

Schneider Electric GoPact MCCB 125, 3-pole, 40 A at 40 °C, TM-D thermal-magnetic trip unit, 30 kA breaking capacity at 380/415 V AC, IP20, screw terminals, grey (RAL 7035).

$80.28Ref. price · indicative, final on quote
Schneider Electric G12F3F40 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

G12F3F40 — Identification
ParameterValue
Product nameGoPact MCCB 125
Product range (series)GoPact MCCB
Product/component typeCircuit breaker
Device applicationDistribution
G12F3F40 — 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
G12F3F40 — 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
G12F3F40 — Mechanical
ParameterValue
Mounting supportBackplate
Control typeToggle
G12F3F40 — 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
G12F3F40 — Approvals
ParameterValue
StandardsEN/IEC 60947-1 EN/IEC 60947-2 EN/IEC 60947-2 Annex H
G12F3F40 — 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
G12F3F40 — Specifications
ParameterValue
[Ir] long-time protection pick-up adjustment range1 x In
Trip unit protection functionsLI

Product details

The Schneider Electric G12F3F40 is a GoPact MCCB 125 molded-case circuit breaker, rated 40 A at 40 °C with a TM-D thermal-magnetic trip unit providing LI protection — thermal for overload (L) and magnetic for short-circuit (I). Its 30 kA breaking capacity at 380/415 V AC (performance level F) means it can safely interrupt fault currents up to that level on a 415 V distribution bus without upstream cascading. Fixed-mount, backplate installation, screw terminals front-connected both sides — standard for panel integration.

Mounting and connections — panel integration notes

Fixed mounting on a backplate, accepts horizontal or vertical orientation. Connection pitch 25 mm. IP20 finger-safe terminals. Width 75 mm, depth 60 mm, height 130 mm. Colour grey (RAL 7035) — matches standard industrial panel aesthetics.

Frequently asked questions

What is G12F3F40's breaking capacity?

30 kA at 380/415 V AC (performance level F). This is the maximum short-circuit current it can safely interrupt at that voltage.

What trip unit does G12F3F40 use?

A TM-D thermal-magnetic trip unit with LI protection: thermal element for overload (L), magnetic element for short-circuit (I). Fixed rating at 40 A at 40 °C.

What standards does G12F3F40 comply with?

EN/IEC 60947-1, EN/IEC 60947-2, and EN/IEC 60947-2 Annex H for selective coordination. Also conforms to IEC 60664-1 for pollution degree 3 and IEC 60529 for IP20.

MPN
G12F3F40