What this MCCB delivers for your panel
The Siemens SENTRON 3VA2225-5JP32-0DH0 is a 3-pole molded case circuit breaker rated for 250 A continuous current at 40 °C, with an ETU550 electronic trip unit for adjustable protection curves. It breaks up to 187 kA at 240 V, so it handles high-fault-current service-entrance and distribution applications where upstream coordination demands a high interrupting rating. The 800 V rated insulation voltage (Ui) gives headroom for 480 V and 600 V class systems without derating the insulation path. The ETU550 trip unit supports LSIG protection (long-time, short-time, instantaneous, ground-fault) with adjustable pickups and time delays — typical for feeder breakers protecting transformers, busways, or large motor control centers. The undervoltage release (UVR) is built in, so a loss of control voltage trips the breaker open, which is standard for emergency-stop and safety isolation circuits.
Breaking capacity across voltage levels
Interrupting ratings climb as voltage drops: 187 kA at 240 V, 121 kA at both 415 V and 440 V, 79 kA at 500 V, and 5.1 kA at 690 V. That 5.1 kA at 690 V is the weak point — if your system runs 690 V with fault current above that, this breaker won't clear it safely. For standard 480Y/277 V distribution, the 121 kA at 440 V is the relevant benchmark, and it gives ample margin for most industrial service-entrance panels.
Thermal derating and ambient limits
The breaker holds 250 A from 40 °C through 50 °C without derating. At 55 °C it drops to 238 A, at 60 °C to 225 A, at 65 °C to 213 A, and at 70 °C to 200 A. If your panel ambient runs 55 °C or higher, factor the reduced continuous current into your load schedule. The operating temperature range spans -25 °C to 70 °C, with storage from -40 °C to 80 °C.
Auxiliary and communication options
Factory-fitted with 2 auxiliary switches plus 1 trip alarm switch (HQ type), so you get remote status indication without adding modules. The communication function is present, meaning it can integrate with a BMS or SCADA via the SENTRON communication platform. The integrated auxiliary trip (order code 3VA9608-0BB25) and the basic switch (3VA2225-5JP32-0AA0) are the subcomponents if you ever need to replace the internal switching mechanism.
Physical fit and panel integration
Dimensions: 181 mm high, 105 mm wide, 86 mm deep. That 105 mm width is standard for a 3-pole SENTRON 3VA2 frame — it fits the same mounting footprint as other 3VA2 250 A breakers. The 86 mm depth means it clears most 200 mm deep enclosures with room for rear-connected bus bars or cable lugs. Trip indicator is visible through the front cover, so a quick glance tells you if it's tripped without opening the door.