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SIEMENS B335 three-pole miniature circuit breaker, grey plastic housing with toggle actuators and bolt-on lugs

SIEMENS

SIEMENS B335 Circuit Breaker 35A 3 Pole 240V AC 10kA

SKU CH-E9ZN-49YWS

A 35 A three-pole miniature circuit breaker rated 240 V AC with a 10 kA interrupting capacity for Siemens P1 panelboards

  • 35 A rating protects three-phase circuits up to 240 V
  • 10 kA interrupting capacity handles high fault currents safely
  • Bolt-on mounting fits Siemens P1 panelboards directly
  • Accepts 14–6 AWG copper or 12–6 AWG aluminium conductors
  • BL series frame rated at 125 A for consistent performance

Circuit Breaker for Three-Phase Panels

The SIEMENS B335 is a 35 A miniature circuit breaker built for three-phase 240 V AC systems. It fits Siemens P1 panelboards and uses a bolt-on mounting style for secure installation in compatible load centres. Electrical contractors and facility managers specify it for standard branch-circuit protection where a 10 kA interrupting rating meets the available fault current.

Bolt-On Mounting and Lug Terminals

The breaker mounts directly to the panel bus via a bolt-on connection, reducing the chance of loose fitment over time. A toggle actuator provides clear on-off indication and manual reset after a trip. Lug terminals accept copper conductors from 14 AWG up to 6 AWG and aluminium conductors from 12 AWG up to 6 AWG, simplifying wire preparation for the 35 A rating.

Interrupting Rating and Voltage Limits

The 10 kA AIR rating at 240 V AC defines the maximum prospective fault current the device can safely interrupt; systems with higher available fault current require a breaker with a greater rating. The unit carries no DC voltage rating, so it cannot be used on direct-current circuits. Installations needing more than three poles or a higher ampere frame must select a different device.

Highlights

  • 35 A rating protects three-phase circuits up to 240 V
  • 10 kA interrupting capacity handles high fault currents safely
  • Bolt-on mounting fits Siemens P1 panelboards directly
  • Accepts 14–6 AWG copper or 12–6 AWG aluminium conductors
  • BL series frame rated at 125 A for consistent performance

Specifications

BrandSIEMENS

Questions about this item

What interrupting rating does the 35 A BL-series breaker provide at 240 V AC?

The B335 is rated 10 kA at 240 V AC, so it will safely clear fault currents up to that level in a compatible panel.

What panel space and mounting style does this three-pole unit require?

It uses a bolt-on mounting style and occupies three pole spaces in a Siemens P1 panelboard with a 125 A frame size.

Which wire gauges can be landed on the lug terminals, and what torque step is often missed?

Copper conductors from 14 AWG to 6 AWG and aluminium from 12 AWG to 6 AWG are accepted; the step many installers forget is torquing the lug screws to the value printed on the breaker label.

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