Molded Case Circuit Breaker for Line Protection
The SENTRON 3VA2225-6JQ32-0HL0 is a 3-pole molded case circuit breaker (MCCB) designed for line protection, carrying a continuous current rating of 250 A at 40 °C and maintaining that rating through 50 °C, then derating to 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, and 200 A at 70 °C. This thermal performance means the breaker can be installed in a warm enclosure without forced cooling and still hold its full 250 A rating up to 50 °C — a practical advantage for densely packed panels where ambient temperatures climb. Breaking capacity is rated at 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 4.5 kA at 690 V. The steep drop at 690 V reflects the arc-extinction limits of the 3-pole design at higher line-to-line voltages; for 690 V applications, verify the available fault current stays under 4.5 kA. The breaker ships with a shunt trip release (STL) and an auxiliary switch block configured as 2 auxiliary switches plus 1 trip alarm switch plus 1 electrical alarm switch (HQ designation). A voltage trigger is present, and a trip indicator provides local visual status. Communication function is built in, supporting integration with higher-level monitoring or control systems.
Dimensions and Panel Fit
Physical footprint: 181 mm height, 105 mm width, 86 mm depth. The 105 mm width is standard for a 3-pole MCCB in this frame size, so it drops into existing SENTRON 3VA panel cutouts without re-spacing. Depth of 86 mm leaves clearance behind the gland plate for wiring and the shunt trip harness.
Electrical and Environmental Ratings
Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. Maximum power loss at rated current is 48 W — this heat must be factored into enclosure thermal calculations, especially when the breaker is mounted alongside other dissipating devices in a sealed cabinet. The adjustable thermal-magnetic trip unit is set at the factory with an initial value of 50 A and a full-scale value of 250 A. The breaker is designed for line protection, not motor or generator protection — the trip curve and coordination characteristics are optimized for feeder and distribution circuits.