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Siemens BQD320 three-pole bolt-on breaker, grey toggle, compact industrial housing

SIEMENS

SIEMENS BQD320 Miniature Circuit Breaker 20A 3 Pole 480V AC

SKU CH-RVP1-YQN3V

Three-pole miniature circuit breaker rated 20 A at 480 V AC with 14 kA interrupting capacity, bolt-on mounting for Siemens P1 panelboards

  • 20 A three-pole protection for 480 V AC circuits
  • 14 kA interrupting rating handles high fault currents
  • Bolt-on mounting fits Siemens P1 panelboards directly
  • Frame rated to 100 A supports future load growth
  • Operates reliably up to 104 °F ambient temperature

SIEMENS BQD320 20A Three-Pole Breaker

The SIEMENS BQD320 is a 20 A miniature circuit breaker rated for 480 V AC three-phase systems. It belongs to the BQD series with a 100 A frame size and a 14 kA interrupting rating at 480 V AC. Designed for bolt-on mounting in Siemens P1 panelboards, it suits commercial and industrial branch-circuit protection.

Bolt-On Mounting with Lug Terminals

The breaker uses a bolt-on mounting style that secures directly to the panelboard bus, while lug terminals accept standard wire connections. A toggle actuator provides clear on/off indication and manual reset. The unit operates up to 104 °F and measures 4.5 in long, 3 in wide, and 2.7 in deep for P1 chassis compatibility.

Replaces Standard Branch Breakers in P1 Panels

This device replaces a standard branch breaker when a 20 A three-pole rating is required in a Siemens P1 load centre. The upgrade is worth it when the circuit demands 480 V AC three-phase supply and a 14 kA AIR rating. It is not for DC circuits, single-phase loads, or panels outside the P1 series.

How it compares

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Price $770.99
Pricier than about 91% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameSIEMENS

Questions about this item

What interrupting capacity does the 480 V AC rating cap at for the BQD320?

The breaker carries a maximum AIR rating of 14 kA at 480 V AC.

What panelboard series and mounting style are required for the BQD320?

It bolts onto Siemens P1 panelboards using the bolt-on mounting style.

How is the BQD320 installed and what step is commonly missed?

Bolt the unit onto the P1 panelboard bus, torque the lug terminals to spec, and verify the 3-pole toggle engages all phases.

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