Siemens 3VA1020-3ED36-0AD0 — SENTRON MCCB, 20 A, 3-Pole, TM210 Release
The Siemens 3VA1020-3ED36-0AD0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in distribution panels. It carries a 20 A continuous rating from 40 °C through 55 °C, derating to 19 A at 60–70 °C — so in a warm enclosure you lose 1 A above 55 °C ambient. Three-pole construction, 70 mm deep × 76.2 mm wide × 130 mm tall. The 76.2 mm width is a standard 3-module DIN-rail footprint, so it slots into existing SENTRON or third-party distribution boards without re-drilling gland plates. Breaking capacity is voltage-dependent: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at both 500 V and 690 V. The 52.5 kA at 415 V covers most European 400 V industrial grids with headroom for high-fault installations.
TM210 Overcurrent Release and Auxiliary Switch Configuration
Fitted with a TM210 thermal-magnetic release — the '210' indicates the fixed thermal trip at 20 A and a magnetic short-circuit pickup that is adjustable or fixed per the TM210 variant. No undervoltage release, no voltage trip, no ground-fault monitoring on this order code. The basic switch variant is 3VA10203ED360AA0, and the auxiliary switch block carries three HQ auxiliary switches. That means you get three form-C (changeover) aux contacts for status feedback to a PLC or indication lamp — enough for a motor feeder or backup supply tie. Rated insulation voltage is 800 V, and maximum power loss is 12 W. The 12 W dissipation matters when grouping several breakers in a sealed enclosure — you need to account for the heat in the thermal derating calculation.
Lifecycle and Sourcing
Storage temperature range is -40 °C to 80 °C; operating range is -25 °C to 70 °C. The storage floor of -40 °C is typical for unheated warehouses in cold climates — the breaker can sit on a shelf through winter before installation.