The Siemens SENTRON 3VA2063-6HL32-0KC0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current across the full ambient temperature range of 40 °C to 70 °C — no derating needed up to that ceiling. Designed for line protection, it carries a shunt trip release (STL) and two auxiliary switches HQ, making it a fit for remote-trip and status-monitoring circuits in distribution panels. Breaking capacity is the headline here: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3 kA at 690 V. Those figures mean this MCCB can safely interrupt fault currents at the listed levels without upstream cascading — critical for high-available-fault-current installations like transformer secondaries or large motor control centers. Dimensions: 105 mm wide, 181 mm tall, 86 mm deep.
What the Ratings Mean for Fit
The 63 A continuous rating is flat from 40 °C to 70 °C ambient — no thermal derating curve to calculate. That simplifies panel thermal budgeting: if the enclosure ambient stays under 70 °C, the breaker delivers its full 63 A without adjustment. The shunt trip release (STL) allows remote tripping from a safety circuit, emergency stop, or fire-alarm panel. Two auxiliary switches HQ provide status feedback — open/closed indication to a PLC or SCADA. No undervoltage release is fitted on this variant, so a loss-of-control-voltage event will not automatically trip the breaker. Maximum power loss is 5.4 W — negligible for panel heat-load calculations, but worth noting if the breaker is in a sealed, high-density enclosure with other heat sources.
Deployment Context
As a line-protection MCCB, the 3VA2063-6HL32-0KC0 is intended for main or branch feeder protection in low-voltage distribution boards, motor control centers, and industrial switchgear. The 3-pole design suits three-phase systems up to 690 V, with breaking capacity that handles high-fault-current scenarios typical of industrial transformer secondaries. Panel integration: the 105 mm width and 86 mm depth fit standard SENTRON mounting patterns. The shunt trip and auxiliary switches are pre-configured at the factory — no field assembly of accessories required.