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Schneider Electric C103MG040 — Miniature Circuit Breakers (MCB)

C103MG040 Trip Unit TM40G ComPacT NSX, 40 A, 3P

MPNC103MG040
Active

Schneider Electric ComPacT NSX series, TM-G trip unit C103MG040, thermal-magnetic, 40 A, 3 poles 3D, 690 V AC / 750 V DC, EN/IEC 60947-2.

$86.27Ref. price · indicative, final on quote
Schneider Electric C103MG040 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

C103MG040 — Identification
ParameterValue
Product rangeComPacT
Product range (series)ComPacT NSX100...250 ComPacT NSX100...250 DC
Product/component typeTrip unit
Device applicationGenerator
C103MG040 — Ratings
ParameterValue
Poles configuration3P
Rated operational voltage (Ue)690 V AC 50/60 Hz 750 V DC
Network type (AC/DC)AC DC
Network frequency50/60 Hz
C103MG040 — Protection
ParameterValue
Trip unit technologyThermal-magnetic
Earth-leakage protectionWithout
C103MG040 — Environmental
ParameterValue
Operating ambient temperature-25...70 °C
Storage ambient temperature-50...85 °C
IP degree of protectionIP40 conforming to IEC 60529
Pollution degree3 conforming to IEC 60947-1
C103MG040 — Approvals
ParameterValue
StandardsEN/IEC 60947-2
C103MG040 — Specifications
ParameterValue
[Ir] long-time protection pick-up adjustment range0.7...1 x In
Trip unit protection functionsLI

Product details

TM-G trip unit for generator protection

The C103MG040 is a TM-G thermal-magnetic trip unit from the ComPacT NSX100...250 family, rated 40 A at 40 °C. It protects three poles (3D) in a fixed-mount breaker. The TM-G curve is tuned for generator applications — the long-time pickup is adjustable 0.7–1 x In, and the instantaneous pickup is fixed at 80 A (2 x In for this 40 A rating). That fixed magnetic threshold means it rides through generator inrush without nuisance tripping, but verify coordination with downstream loads.

Voltage and standard compliance

Conforms to EN/IEC 60947-2 for low-voltage switchgear. IP40 front face protection.

Frequently asked questions

What is C103MG040's listed range and standards?

The C103MG040 belongs to the ComPacT NSX100...250 range and conforms to EN/IEC 60947-2.

How do I get current pricing and availability for C103MG040?

Submit an RFQ through this listing. Pricing and stock levels are confirmed at quote time through independent distribution channels.

What is the closest alternative to C103MG040 in this family?

Within the ComPacT NSX100...250 range, other TM-G trip units differ only by rating (e.g., 25 A, 50 A). The C103MG040 is the 40 A variant; no pin-compatible drop-in exists outside the TM-G family without changing the breaker frame.

MPN
C103MG040