Siemens 3VA1220-5GF42-0AH0 — 200 A 4-Pole MCCB with TM240 Release
The Siemens 3VA1220-5GF42-0AH0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection, carrying a fixed 200 A rating across all four poles. Its TM240 thermal-magnetic release provides overload and short-circuit protection without an undervoltage release or ground-fault monitoring module built in. The interrupting capacity reaches 187 kA at 240 V and 121 kA at 415 V, so it handles high-fault utility feeds or transformer secondaries without cascading upstream.
Thermal Derating and Panel Fit
Full 200 A rating holds from 40 °C up to 50 °C ambient — no derating needed in a typical 40 °C panel. At 55 °C it drops to 194 A, then 188 A at 60 °C, 182 A at 65 °C, and 176 A at 70 °C. The 70 mm depth and 140 mm width fit standard MCCB panel cutouts; the 158 mm height clears most distribution board covers. Maximum power loss of 42 W means ventilation is advisable in a sealed enclosure with other heat sources.
Interrupting Capacity Across Voltage Tiers
The interrupting ratings span the common voltage levels: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, 30 kA at 500 V, and 17 kA at 690 V. The 800 V rated insulation voltage supports 690 V line-to-line systems. For a 480 V panel, the 75.6 kA at 440 V figure is the applicable limit — check that against your available fault current.
Auxiliary Switching and Trip Indication
Comes with 2 auxiliary switches plus 1 trip alarm switch (HQ type) factory-fitted. The trip indicator gives a visible flag when the breaker has opened on a fault. No communication function or voltage-triggered shunt trip is included — this is a straightforward thermal-magnetic breaker for hardwired distribution.
Lifecycle and Sourcing
Lifecycle status is current production. Standard catalog item in the SENTRON 3VA series, sourced through independent distribution.