What it is and what it does
The Siemens SENTRON 3VA1010-2ED46-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for 100 A continuous current, designed for line protection in commercial and industrial distribution panels. It uses a TM210 thermal-magnetic overcurrent release — the thermal element handles overloads, the magnetic element handles short-circuits — so no external trip unit or power supply is needed. Breaking capacity varies with system voltage: 52.5 kA at 240 V, 32 kA at 415 V, 13.6 kA at 440 V, and 7.5 kA at both 500 V and 690 V. That 52.5 kA at 240 V means it can safely interrupt a fault current up to that level on a 240 V line without the arc re-striking or the breaker failing — critical for high-fault panels near transformers or large motor banks.
Thermal derating and panel fit
The breaker carries its full 100 A rating from 40 °C up to 50 °C ambient. Above that, derate linearly: 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, and 91 A at 70 °C. If your panel runs hot — say, a sealed enclosure with multiple breakers — plan for that 9 A drop at the top end rather than assuming full rating. Dimensions are 130 mm high, 101.6 mm wide, 70 mm deep — a standard 4-pole MCCB footprint that fits Siemens SENTRON distribution blocks and most DIN-rail or mounting-plate layouts. Maximum power loss is 25 W, which matters for thermal budgeting in a crowded panel.
What it does not include
This variant has no communication function (no Modbus, no PROFIBUS, no Ethernet), no undervoltage release, no ground-fault monitoring, and no trip indicator. It is a pure thermal-magnetic breaker — line in, line out, no auxiliary electronics. If you need remote tripping or ground-fault protection, you want a different 3VA variant with those options built in.