SENTRON 3VA1010-4ED32-0AH0 — 100 A MCCB for Line Protection
The Siemens SENTRON 3VA1010-4ED32-0AH0 is a 3-pole molded case circuit breaker rated for 100 A continuous current at 40 °C, designed for line protection in distribution panels and industrial switchboards. Its interrupting capacity reaches 121 kA at 240 VAC and 75.6 kA at 415 VAC, giving it the headroom to clear high-fault conditions without cascading upstream — a key spec for low-voltage main or feeder duty where available fault current is high. The TM210 thermal-magnetic release provides fixed thermal and magnetic trip settings, tuned for overload and short-circuit protection on cable and busbar runs.
Thermal Derating and Operating Envelope
The breaker holds its full 100 A rating up to 50 °C ambient, then derates linearly: 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, and 91 A at 70 °C. That curve matters when the MCCB lives in a crowded, warm enclosure — the actual continuous current you can count on at 60 °C is 96 A, not the nameplate 100 A. Operating temperature range spans -25 °C to 70 °C; storage range is -40 °C to 80 °C. Maximum power loss is 25 W.
Mounting and Auxiliary Configuration
The 3VA1010-4ED32-0AH0 measures 130 mm high, 76.2 mm wide, and 70 mm deep — a standard 3-pole MCCB footprint that fits SENTRON distribution panels and most DIN-rail or screw-mount enclosures. It ships with a factory-fitted auxiliary switch block: 2 auxiliary switches plus 1 trip alarm switch (HQ configuration), providing status feedback for PLC or SCADA without requiring a separate add-on module. Rated insulation voltage is 800 V, and the breaker carries no undervoltage release, no ground-fault monitoring, and no communication module — it's a straight line-protection device, not a multifunction power breaker.