SQUARE D
SQUARE D HGA36125 Molded Case Circuit Breaker POWERPACT H 125A 3 Pole
A 125 A three-pole molded case breaker rated 65 kA at 240 V AC and 600 V AC for I-Line panelboards
- 125 A rated current protects three-phase circuits up to 600 V AC
- 65 kA interrupting rating at 240 V AC handles high fault currents
- Thermal-magnetic trip unit with fixed instantaneous action provides reliable overload and short-circuit protection
- I-Line mounting style fits directly into compatible panelboards without extra hardware
- 150 A frame size in a compact 9.73 × 4.48 × 4.8 in enclosure saves panel space
POWERPACT H 125 A Three-Pole Breaker
This molded-case circuit breaker from the POWERPACT H series carries a 125 A rating with a 600 V AC and 250 V DC voltage rating. It is built for I-Line panelboards and provides three-pole protection in commercial and industrial power distribution systems.
Lug Terminals and I-Line Mounting
The breaker terminates with lug connections and mounts directly onto an I-Line bus without additional hardware. Thermal-magnetic trip units have fixed instantaneous settings, so coordination studies must use the published 700 A high and 900 A low trip points rather than adjustable curves.
65 kA Interrupting at 240 V AC
The maximum AIR rating reaches 65 kA at 240 V AC, which defines the upper fault-current limit the device can safely clear. At the full 600 V AC rating the interrupting capacity is lower, so engineers must verify the available short-circuit current against the breaker’s published curve before specifying it.
Highlights
- 125 A rated current protects three-phase circuits up to 600 V AC
- 65 kA interrupting rating at 240 V AC handles high fault currents
- Thermal-magnetic trip unit with fixed instantaneous action provides reliable overload and short-circuit protection
- I-Line mounting style fits directly into compatible panelboards without extra hardware
- 150 A frame size in a compact 9.73 × 4.48 × 4.8 in enclosure saves panel space
Specifications
| Brand | SQUARE D |
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Questions about this item
How can I verify the breaker is operating correctly once it is installed?
Apply load and confirm the thermal-magnetic trip interrupts at the 700 A high setting or 900 A low setting as required, and check that the handle moves firmly to the tripped position.
What comes in the box and what must I source separately?
The breaker ships with factory-fitted lug terminals for I-Line panelboards; mounting hardware for the panelboard and any external accessories are not included.
Which version should I choose for a 600 V AC three-phase panel?
Select the HGA36125 — it is rated 125 A, 600 V AC, 250 V DC, 65 kA AIR at 240 V AC, and fits a 150 A HG frame in a three-pole I-Line mounting.
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