The Siemens SENTRON 3VA1010-4ED42-0CH0 is a 4-pole molded case circuit breaker (MCCB) rated for line protection. It carries 100 A continuously at 40 °C ambient, derating to 91 A at 70 °C. The interrupting capacity hits 121 kA at 240 V AC, dropping to 75.6 kA at 415 V and 52.5 kA at 440 V — still substantial for most industrial distribution panels. Rated insulation voltage is 800 V, so it handles 480 V and 600 V class systems without derating on the insulation side.
Breaking capacity and selectivity
The 121 kA at 240 V is what you need for high-fault service-entrance or large sub-distribution boards where upstream transformer impedance is low. At 415 V the 75.6 kA still gives headroom for most MCC panels. The 11.9 kA at 690 V is worth noting — if your system runs 690 V (common in mining or marine), this breaker still clears faults at that voltage, though the lower kA means you verify coordination with upstream devices.
Current derating curve
Rated 100 A from 40 °C through 50 °C. At 55 °C it drops to 98 A, at 60 °C to 96 A, at 65 °C to 94 A, and at 70 °C to 91 A. If the panel ambient runs hot — say near a drive cabinet or in a non-climate-controlled enclosure — the 91 A at 70 °C is the number to size against. No derating needed up to 50 °C, which covers most ventilated indoor panels.
Built-in accessories
This variant ships with an undervoltage release (UVR) and a configuration of 2 auxiliary switches plus 1 trip alarm switch (HQ). The UVR means the breaker drops out on loss of control voltage — useful for emergency-stop circuits or undervoltage protection on motor feeders. The trip alarm switch signals a fault trip separately from manual switching, which simplifies remote monitoring. No ground-fault monitoring on this version; if GF protection is needed, you step to a different suffix.