Siemens BQD250 Molded Case Circuit Breaker

This breaker is designed for direct bolt-on installation in Siemens P1, P2, P3, P4, and P5 lighting and distribution panelboards. In standard P1 to P3 configurations, the breaker tabs bolt directly to the panel bus without requiring a separate twin mounting strap kit.

Although they share the same internal trip components and electrical ratings, they have different physical mounting configurations. The BQD250 is a bolt-on breaker for panelboards, while the CQD250 is designed for independent DIN rail mounting within OEM equipment or custom control enclosures.

Yes, this thermal magnetic breaker is rated for 125/250V DC applications with a 14kA interrupt capacity. This dual rating makes it suitable for specific industrial DC control panels, battery backup grids, and transit systems.

Yes, this 50A breaker is HACR rated. It is fully approved by UL for use with heating, air conditioning, and refrigeration equipment that requires dedicated overcurrent protection.

The breaker features standard mechanical load lugs that accept 8-1 AWG copper or 6-1/0 AWG aluminum wire. The line side features bolt-on connection tabs designed specifically for fastening directly to a Siemens panelboard bus.

Yes, Siemens BQD frame circuit breakers are UL listed for reverse feed applications. This capability allows the breaker to be used as a back-fed main breaker or in backup power tie-ins where power flows from the load side to the line side.

Yes, the BQD frame supports aftermarket handle blocking devices and padlock attachments. Using an accessory like the Siemens BQDHBD allows facility managers and electricians to securely lock the breaker in the OFF position during maintenance procedures.

Terminal shields are optional accessories that slide over the load lugs. They are typically deployed in specialized enclosures or open-front industrial panels where secondary touch-safe covers are required to prevent accidental contact with live wire terminations.