Siemens 3VA2225-5HN42-0HH0 — 250 A SENTRON MCCB, 4-Pole, Line Protection
The Siemens 3VA2225-5HN42-0HH0 is a SENTRON molded case circuit breaker (MCCB) rated for 250 A continuous current at 40 °C, with a 4-pole configuration and a maximum breaking capacity of 187 kA at 240 VAC. It is designed for line protection in distribution panels and switchgear, carrying a 2500 A rated ultimate short-circuit breaking capacity (Icu) that drops to 4.5 kA at 690 VAC — the voltage-dependent curve governs where this breaker can be applied as the main or feeder device.
Breaking Capacity and Selectivity Planning
At 240 VAC the 3VA2225-5HN42-0HH0 interrupts 187 kA; at 415 VAC that figure is 121 kA, and at 690 VAC it drops to 4.5 kA. For a 480 VAC panel (common in North American industrial distribution), the 75.6 kA at 500 VAC is the closest published point — enough for most service-entrance applications with transformer impedances limiting fault current below that threshold. The 2500 A Icu rating at 2500 A rated current means this breaker is sized for high-fault installations where a standard 65 kA MCCB would not hold coordination.
Thermal Derating and Panel Fit
The breaker carries 250 A continuously from 40 °C through 50 °C ambient; above that it derates linearly to 213 A at 70 °C. In a sealed enclosure with multiple devices, the 48 W maximum power loss at rated load must be factored into the thermal budget. Physical dimensions are 181 mm height, 140 mm width, and 86 mm depth — a standard MCCB footprint for 4-pole frames in this class, fitting most DIN-rail or panel-mount enclosures without gland-plate conflicts.