The Siemens SENTRON 3VA1032-4ED36-0BC0 is a 3-pole molded case circuit breaker (MCCB) rated for 32 A continuous at 40 °C, designed for line protection in distribution panels. Its interrupting capacity hits 121 kA at 240 VAC — that is the short-circuit current it can safely clear without welding contacts or rupturing the case, which matters when the available fault current at the panelboard is high. The 800 V rated insulation voltage gives headroom for 480 V and 600 V class systems.
Breaking capacity across voltages
The 3VA1032-4ED36-0BC0 carries a 75.6 kA interrupting rating at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. For a 480 V delta service (common in North American industrial panels), the 52.5 kA at 440 V is the nearest published figure and suggests ample margin for most secondary distribution applications. The 11.9 kA at 690 V is the floor — still adequate for most 600 V class motor branch circuits.
Thermal derating and panel integration
Rated current holds at 32 A from 40 °C through 50 °C, then derates to 31 A at 55–60 °C and 30 A at 65–70 °C. In a sealed enclosure with multiple breakers ganged, expect to apply the 30 A figure if internal ambient reaches 65 °C. The 76.2 mm width (3 in) and 70 mm depth (2.76 in) fit standard MCCB mounting footprints; the 130 mm height (5.12 in) is typical for this frame size. Maximum power loss is 13.1 W — negligible for thermal budgeting in a ventilated panel.
Auxiliary and release configuration
Factory-fitted with an undervoltage release (UVR) and two HQ auxiliary switches. The UVR trips the breaker when control voltage drops below a threshold — standard for emergency-stop chains or undervoltage protection on motor feeders. The two auxiliary switches provide status feedback (open/closed) to a PLC or annunciator panel. No trip indicator, no ground-fault monitoring, no communication module on this variant.