The C104TM032C is a thermal-magnetic trip unit from the Schneider Electric ComPacT NSX100...250 line, designed for distribution applications in AC or DC networks. It mounts in a 4-pole fixed circuit breaker, occupying the neutral-left position, and provides LI protection — thermal overload (L) via an adjustable long-time pickup (Ir 0.7...1 x In) and magnetic short-circuit (I) with a fixed instantaneous pickup of 400 A.
The 32 A rating at 50 °C sets the continuous current the trip unit can carry in a 50 °C ambient — if your panel runs hotter, you must derate per the thermal curve (the unit's operating range is -25...70 °C). The LI protection curve gives you a fixed long-time delay (120...400 s at 1.5 x In, 15 s at 6 x Ir) and a fixed instantaneous threshold of 400 A, which means magnetic trips happen at about 12.5 x In — appropriate for distribution feeders where you need high inrush immunity without nuisance tripping. The adjustable Ir (0.7...1 x In) lets you dial down the thermal pickup to match a downstream load, but the magnetic Ii stays fixed, so plan coordination with downstream devices accordingly. IP40 front-face protection handles finger-safe touch, but the breaker body itself is open inside the enclosure; the IP rating applies only to the front of the mounted breaker.
The C104TM032C carries an active lifecycle status from Schneider Electric, meaning it is current-production and not subject to a last-time-buy notice. No official successor exists because none is needed — the part is in active manufacture.
What Compliance Documentation to Expect
The trip unit carries a Class II electrical shock protection rating and is built to EN/IEC 60947-2, which covers the safety and performance requirements for low-voltage switchgear. The manufacturer's standard documentation package includes a declaration of conformity to the applicable EU directives (CE) and the IEC standard. RoHS and REACH compliance declarations are available from the manufacturer's documentation portal; the part does not include earth-leakage protection (no built-in RCD function).