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Siemens BQD315 three-pole bolt-on breaker, grey toggle, compact frame

SIEMENS

SIEMENS BQD315 Miniature Circuit Breaker 15A 3 Pole 480V AC

SKU CH-02KN-EV80Y

Three-pole miniature breaker rated 15 A at 480 V AC with 14 kA interrupting capacity for Siemens P1 panels

  • 15 A three-pole protection for 480 V AC circuits
  • 14 kA interrupting capacity handles high fault currents
  • Bolt-on mounting fits Siemens P1 panelboards directly
  • 100 A frame size in compact 4.5 × 3 × 2.7 in housing
  • Rated for continuous operation up to 104 °F

Three-Pole 480 V AC Protection

The SIEMENS BQD315 is a 15 A miniature circuit breaker designed for three-phase panels rated up to 480 V AC. It fits Siemens P1 panelboards and provides a 14 kA interrupting rating at that voltage. The unit is suited for commercial and light-industrial circuits requiring bolt-on mounting.

Bolt-On Mounting and Lug Terminals

The breaker uses a bolt-on mounting style with lug terminal connections for secure attachment to the bus. A toggle actuator gives clear on-off indication. The frame size is 100 A within the BQD series, and the device carries no DC voltage rating.

Compact Frame and Temperature Rating

The housing measures 4.5 in long, 3 in wide and 2.7 in deep, allowing it to sit in standard panelboard cavities. Maximum operating temperature is 104 Degrees F, so ventilation in the enclosure must keep ambient conditions within that limit. Buyers needing a higher amperage frame or a different pole count will need another model.

Highlights

  • 15 A three-pole protection for 480 V AC circuits
  • 14 kA interrupting capacity handles high fault currents
  • Bolt-on mounting fits Siemens P1 panelboards directly
  • 100 A frame size in compact 4.5 × 3 × 2.7 in housing
  • Rated for continuous operation up to 104 °F

Specifications

BrandSIEMENS

Questions about this item

Will the bolt-on lug terminals on this BQD315 need periodic re-torquing?

Bolt-on lug terminals should be checked and re-torqued to Siemens specifications during routine panel maintenance to prevent loose connections.

What interrupts the 15 A rating first during a sustained overload?

The thermal trip element opens the breaker when current exceeds 15 A for a duration defined by the BQD series time-current curve.

How much heat does the breaker add inside a P1 panelboard running at full load all day?

At 15 A continuous load the device dissipates a few watts, raising local enclosure temperature but staying within the 104 °F maximum operating limit.

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