MCCB for distribution panels — 32 A, 3-pole, line protection
The Siemens 3VA1032-2ED36-0DA0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection duty, carrying a continuous current Iu of 32 A across three poles. It's built for panelboard or enclosure mounting — the 70 mm depth and 76.2 mm width fit standard distribution cutouts, and the IP40 front rating keeps dust out of the operator face. The TM210 thermal-magnetic release handles overload and short-circuit protection without electronic adjustment — a fixed-trip design that simplifies specification for straightforward line-feeder or submain protection. No auxiliary contacts, no communication module, no ground-fault monitoring: this is a clean, no-frills MCCB for basic overcurrent protection where you don't need remote status or adjustable curves. Breaking capacity climbs with lower system voltage: 52.5 kA at 240 V, 32 kA at 415 V, 13.6 kA at 440 V, and 7.5 kA at 690 V. At 415 V — common in industrial distribution — that 32 kA SCCR gives headroom for most low-voltage switchgear lineups without cascading upstream. The 800 V rated insulation voltage (Ui) confirms the internal creepage and clearance are sized for 690 V systems.
Thermal derating — what the 32 A means at panel ambient
The 32 A rating holds flat from 40 °C through 50 °C — no derating needed in a typical ventilated panel. At 55 °C it drops to 30.72 A, at 60 °C to 30.08 A, at 65 °C to 29.44 A, and at 70 °C to 28.8 A. If the breaker sits in a sealed enclosure or near heat sources, check the ambient at the breaker inlet; the TM210 release's thermal element responds to self-heating plus ambient, so a 55 °C panel means you lose about 1.3 A of headroom. Operating range spans -25 °C to 70 °C; storage from -40 °C to 80 °C. The undervoltage release (UVR) is included as standard — part of the auxiliary release design — so the breaker can be tripped remotely on loss of control voltage. The integrated auxiliary trip accessory is order code 3VA9608-0BB25 if you need to add a shunt trip later.
Lifecycle and sourcing
The latching endurance is rated at 15,000 operations — typical for an MCCB in distribution duty where it operates infrequently (a few cycles per year for maintenance switching). That's not a motor-starting contactor rating; if your application cycles the breaker weekly, consider a contactor in series.