What this MCCB carries — and what that means for a 480 V panel
The Siemens SENTRON 3VA1010-3ED42-0AF0 is a 4-pole molded case circuit breaker rated 100 A continuous at 40 °C, with a TM210 thermal-magnetic overcurrent release designed for line protection. That TM210 designation means the thermal pickup is fixed at 1.0× In and the magnetic short-circuit trip is fixed at 10× In — no adjustment dials, so it's a straight swap-in for a feeder or distribution circuit where coordination is set by the upstream breaker, not tweaked at the panel. Interrupting capacity hits 75.6 kA at 240 VAC and still delivers 52.5 kA at 415 VAC, 32 kA at 440 VAC, and 7.5 kA at 500 VAC and 690 VAC. On a 480 V distribution board that SCCR headroom clears most transformer-fed fault currents without needing a current-limiting fuse upstream — useful when you're retrofitting an existing lineup and don't want to re-do the bus bracing. Rated insulation voltage is 800 V, so it's comfortable on 480 V delta or 600 V corner-grounded systems common in mining and mill installations where the step-down transformer secondary sits at 600 V. The 70 mm depth keeps the can from hanging past the gland plate on a standard 600 mm deep enclosure.
Thermal derating and real-world current
The 100 A rating holds from 40 °C through 50 °C ambient — no derating needed in a warm panel. At 55 °C it steps down to 98 A, at 60 °C to 96 A, at 65 °C to 94 A, and at 70 °C to 91 A. That curve is the same one you'd use for a NEMA panel in a hot mill building or a MCC room without air conditioning; the breaker doesn't force a larger frame just because the ambient hits 55 °C. Maximum power loss is 25 W — negligible for enclosure heat rise calculations but worth noting if you're packing six of these in a single column and the panel has no forced ventilation.
DIN-rail integration and auxiliary switch layout
Width is 101.6 mm (4 inches) — four pole spaces on a standard DIN rail, so it occupies the same footprint as any 4-pole MCCB in the SENTRON 3VA family. The 130 mm height and 70 mm depth mean it fits inside a 200 mm tall enclosure section without crowding the wiring trough. Comes with one auxiliary switch and one trip alarm switch (HQ configuration) factory-installed. That gives you a Form C for status feedback to the PLC and a separate Form C that closes only on a trip event — no need to add a separate shunt trip or undervoltage release for remote indication. The base switch does not include undervoltage release or communication function, so if you need remote open/close or Modbus monitoring you'd order the accessory kit separately.
Lifecycle and sourcing posture
The supplied basic switch is order code 3VA10103ED420AA0 — that's the internal sub-assembly. If you're stocking spares at the component level, that's the number for the bare switch without the auxiliary block.