80 A MCCB with TM210 Release — Line Protection for Distribution Panels
The Siemens 3VA1080-4ED32-0BH0 is a SENTRON molded case circuit breaker (MCCB) rated for 80 A continuous current (Iu) with a TM210 thermal-magnetic release, configured for line protection in three-phase distribution. The 80 A rating holds flat from 40 °C through 50 °C, then derates to 76.8 A at 55 °C, 75.2 A at 60 °C, 73.6 A at 65 °C, and 72 A at 70 °C — meaning the breaker delivers full rated current in most ventilated enclosures but needs a 5–10 % headroom margin if the panel ambient runs above 50 °C. Breaking capacity reaches 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V — figures that place it in the high-interrupting category for 400 V-class distribution, suitable for transformer-fed main feeders or large motor control centers where fault currents exceed 50 kA.
Fit and Integration — Panel Dimensions and Auxiliary Wiring
The 3VA1080-4ED32-0BH0 measures 130 mm high, 76.2 mm wide, and 70 mm deep — a standard 3-pole MCCB footprint that bolts into SENTRON distribution blocks or panel-mount chassis without special adapters. IP40 on the front face protects against tool entry in enclosed switchboards; the breaker is not rated for washdown or outdoor exposure. It ships with 2 auxiliary switches plus 1 trip alarm switch (HQ type), wired via the integrated terminal block. The undervoltage release (UVR) is factory-fitted as standard — design code confirms the UVR is built in, not a field-add option. For installations needing a separate shunt trip or auxiliary release, the factory accessory order code is 3VA9608-0BB11.
TM210 Release and Protection Characteristics
The TM210 overcurrent release is a thermal-magnetic design — the thermal element handles overloads (inverse time curve), the magnetic element handles short-circuits (instantaneous pickup at roughly 10× Iu). No electronic adjustment, no communication module, no phase-failure detection. This is a straightforward line-protection breaker for fixed-setting distribution; if you need adjustable long-time or short-time delays, step up to the electronic release variants in the 3VA series. Rated insulation voltage (Ui) is 800 V, giving headroom for 690 V systems. Mechanical endurance is 15,000 operations — typical for a distribution MCCB not cycled daily. Storage range spans -40 °C to 80 °C; operating ambient is -25 °C to 70 °C.