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SIEMENS FXD63B175 molded case circuit breaker 175A 3-pole 600V AC

SIEMENS

SIEMENS FXD63B175 circuit breaker 175A 3-pole 600V AC

SKU CH-NRW5-QWQCG

A 175 A, three-pole molded case breaker rated 600 V AC with a 22 kA interrupting capacity and thermal-magnetic trip

  • 175 A thermal-magnetic trip protects three-phase circuits
  • 600 V AC rating suits industrial power distribution
  • 22 kA interrupting capacity at 600 V AC
  • FD-frame 250 A size fits standard panelboards
  • 500 V DC rating adds flexibility for mixed systems

Siemens FXD63B175 175 A Three-Pole Breaker

This Siemens FXD63B175 molded-case circuit breaker delivers 175 A thermal-magnetic protection in a three-pole, 600 V AC configuration. It carries a 22 kA interrupting rating at 600 V AC and fits Sentron panelboards or SB switchboards without lugs. The fixed instantaneous trip and 250 A frame size suit standard industrial power-distribution panels.

Industrial Panels Requiring 175 A Fixed-Trip

Electrical contractors wiring 600 V AC three-phase distribution boards will find the 175 A low and high trip settings match the feeder rating exactly. The lug terminals accept standard cable and the free-standing mount simplifies panel layout. Facilities needing adjustable trips, higher interrupting capacity, or DC-only ratings above 500 V should select a different device.

22 kA Interrupting Rating at 600 V AC

The 22 kA AIR at 600 V AC is the single figure that confirms the breaker can clear the available fault current on the intended bus. Verify the panelboard’s short-circuit rating against this value before specifying the FXD63B175 for the job.

How it compares

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Price $2,933.99
Pricier than about 96% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameSIEMENS

Questions about this item

What interrupting rating does the FXD63B175 provide at its 600 V AC rating?

The breaker delivers a maximum AIR of 22 kA at 600 V AC, limiting the fault current it can safely interrupt on a 600 V system.

What mounting style and frame size must the panel accommodate for this breaker?

It uses a free-standing mounting style on a 250 A frame, so the enclosure must accept an FD-frame device without integral lugs.

How is the thermal-magnetic trip unit set, and what mistake do installers make?

Both high and low trip settings are fixed at 175 A; the common error is attempting to adjust a non-adjustable instantaneous trip.

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