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Grey rectangular moulded case circuit breaker with three poles and terminal lugs, approximately 6.4 by 4.12 by 4.36 inches

SQUARE D

SQUARE D HDL36150 Molded Case Circuit Breaker 150A 3-Pole

SKU CH-M73F-1BHA6

A 150 A, three-pole molded case breaker rated 600 V AC and 250 V DC with a 25 kA interrupting capacity at 240 V AC, thermal-magnetic trip, fixed instantaneous setting, and line/load lug terminals

  • 150 A three-pole protection for three-phase systems
  • 25 kA interrupting capacity at 240 V AC handles high fault currents
  • Thermal-magnetic trip with fixed instantaneous setting for reliable overload and short-circuit response
  • Line and load lug terminals simplify installation on 600 V AC or 250 V DC circuits
  • Compact 6.4 × 4.12 × 4.36 in frame fits standard enclosures

SQUARE D HDL36150 Molded Case Circuit Breaker

The SQUARE D HDL36150 is a 150A three-pole molded case circuit breaker from the POWERPACT H Series. It provides standard thermal-magnetic protection for three-phase AC systems rated up to 600V AC and DC systems up to 250V DC. The unit features a 150A frame size with fixed instantaneous trip settings.

Installers needing 150A three-phase protection

This breaker suits electrical contractors and maintenance teams installing or replacing 150A three-pole protection in industrial panels or motor control centers. It is not for buyers who need adjustable instantaneous trip settings or a higher interrupting rating than 25kA at 240V AC. It also does not fit applications requiring a different frame size or pole configuration.

Line and load lug terminals included

The breaker ships with line and load lug terminals for direct cable connection. This eliminates the need to source separate terminal kits for standard installations. The free-standing mounting style allows flexible placement within compatible enclosures without additional mounting hardware.

Highlights

  • 150 A three-pole protection for three-phase systems
  • 25 kA interrupting capacity at 240 V AC handles high fault currents
  • Thermal-magnetic trip with fixed instantaneous setting for reliable overload and short-circuit response
  • Line and load lug terminals simplify installation on 600 V AC or 250 V DC circuits
  • Compact 6.4 × 4.12 × 4.36 in frame fits standard enclosures

Specifications

BrandSQUARE D

Questions about this item

What panel rating and mounting space do I need to install this 150 A, three-pole breaker?

The breaker fits a 150 A frame in a panel that accepts free-standing mounting; it measures 6.4 in high, 4.12 in wide and 4.36 in deep.

Can this 600 V AC / 250 V DC breaker protect a legacy 240 V AC panel with a 25 kA fault rating?

Yes, its 25 kA interrupting rating at 240 V AC covers that panel, and the thermal-magnetic trip operates at the same 700 A high / 900 A low settings.

How do I verify the breaker is functioning correctly after installation?

With rated current flowing, the thermal element should trip on sustained overload; a test set injecting 700 A will confirm the high instantaneous trip and 900 A the low setting.

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