Molded Case Circuit Breaker for Line Protection
The SENTRON 3VA1150-5EF36-0AG0 is a 3-pole molded case circuit breaker (MCCB) designed for line protection, rated 50 A at 40 °C with a TM240 thermal-magnetic overcurrent release. Its interrupting capacity reaches 187 kA at 240 V, dropping to 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 500 V and 690 V — figures that define its fault-clearing capability in a distribution panel.
Ratings and What They Mean for Your Panel
Rated 50 A continuously at 40 °C, the breaker derates to 45 A at 70 °C — a 10% drop that matters when the MCCB sits in a crowded enclosure with other heat sources. The 800 V rated insulation voltage (Ui) supports 480/600 V class systems with headroom. The TM240 release means the thermal element is calibrated for a 240 A frame; the magnetic trip setting is fixed within that frame. This is a line-protection device, not a motor-protective breaker — no adjustable magnetic pickup for inrush. At 14.6 W maximum power loss, the heat dissipated into the panel is modest for a 50 A MCCB — roughly equivalent to a small relay coil — but verify the enclosure's thermal budget if multiple breakers are ganged.
Panel Integration and Footprint
Dimensions are 70 mm deep, 76.2 mm wide, 130 mm tall — a compact 3-pole MCCB footprint that fits standard panel-mount cutouts. The 76.2 mm width (3 inches) matches the typical 3-pole MCCB pitch for busbar and lug spacing.
Compliance Documentation
As a SENTRON-series MCCB, this breaker carries the manufacturer's standard compliance documentation package — typically including RoHS, REACH, and IEC/UL certifications for the 3VA platform. Specific cert numbers are verified against the nameplate at receipt.