SENTRON 3VA2225-8HL32-0KH0 — 250 A MCCB for Line Protection
The Siemens SENTRON 3VA2225-8HL32-0KH0 is a 3-pole molded case circuit breaker (MCCB) rated for 250 A continuous current, designed for line protection in distribution panels. Its interrupting capacity reaches 440 kA at 240 V, 330 kA at 415 V and 440 V, 220 kA at 500 V, and 52.5 kA at 690 V — meaning it can safely clear faults up to those levels without upstream cascading, a critical spec for high-fault installations like transformer secondaries or large motor control centers.
Thermal Derating and Panel Fit
The breaker holds its full 250 A rating up to 50 °C ambient, then derates linearly to 213 A at 70 °C — the operating maximum. This means in a warm enclosure (say 55 °C inside a packed panel), the usable current drops to 241 A, so size the upstream conductor and load accordingly. The 86 mm depth, 105 mm width, and 181 mm height fit standard MCCB mounting footprints; the 3-pole block occupies roughly the same DIN-rail or backplate space as other SENTRON 3VA frames.
Auxiliary and Release Configuration
This variant ships with 2 auxiliary switches plus 1 trip alarm switch (HQ designation), and a shunt trip release (STL) for remote tripping. No undervoltage release is fitted, and no ground-fault monitoring module is included — those are separate add-on options. The basic switch assembly is order code 3VA2225-8HL32-0AA0. A voltage trigger and trip indicator are present on the front face for local status indication.
Environmental and Power Loss
Maximum power dissipation is 48 W at rated load — factor that into enclosure thermal calculations. Storage range spans -40 °C to 80 °C; operating range is -25 °C to 70 °C. No communication function or other measurement function is built in; this is a straight line-protection breaker.