SQUARE D
SQUARE D HDL36100 Molded Case Circuit Breaker, POWERPACT H Series, 100A, 3-Pole
Three-pole molded case breaker rated 100 A at 600 V AC with 25 kA interrupting at 240 V AC and fixed thermal-magnetic trip
- 100 A three-pole protection for three-phase circuits
- 25 kA interrupting capacity at 240 V AC handles high fault currents
- Thermal-magnetic trip provides reliable overload and short-circuit response
- 150 A frame size fits standard panel mounting configurations
- Fixed instantaneous trip simplifies coordination without field adjustment
100 A 600 V AC molded-case breaker
The Square D HDL36100 is a three-pole molded-case circuit breaker rated at 100 A with a 600 V AC maximum. It belongs to the PowerPact H series and uses a thermal-magnetic trip unit with a fixed instantaneous setting. The frame size is 150 A and the breaker mounts free-standing. It is intended for three-phase AC distribution panels and similar line-protection applications.
25 kA interrupting at 240 V AC
The single figure that decides fit is the maximum AIR rating of 25 kA at 240 V AC. This interrupting capacity must meet or exceed the available fault current at the point of installation. The breaker also carries a 250 V DC rating, but the 240 V AC rating is the primary selection criterion for most panel builders. Verify system fault-current calculations before specifying this device.
Line/load lugs simplify termination
The unit ships with line/load lug terminals already fitted, so no separate lug kit is required for standard cable connections. Terminal connection type is specified as lug, and the breaker uses an ABC phase connection sequence. Physical dimensions are 6.4 in height, 4.12 in width and 4.36 in depth, which determine panel cut-out and clearance requirements. No additional accessories or software are bundled.
Highlights
- 100 A three-pole protection for three-phase circuits
- 25 kA interrupting capacity at 240 V AC handles high fault currents
- Thermal-magnetic trip provides reliable overload and short-circuit response
- 150 A frame size fits standard panel mounting configurations
- Fixed instantaneous trip simplifies coordination without field adjustment
Specifications
| Brand | SQUARE D |
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Questions about this item
How does a 100 A rating work once this breaker is installed in a panel?
It carries up to 100 A continuously per pole and opens the circuit if the load exceeds that value, using a thermal-magnetic mechanism with fixed instantaneous trip.
What does the 25 kA rating at 240 V AC actually limit?
It is the maximum interrupting capacity; the breaker can safely clear a fault current up to 25 kA at 240 V AC, but cannot be applied where available fault current exceeds that figure.
Will the 6.4 in by 4.12 in footprint fit my existing enclosure?
The unit measures 6.4 in high, 4.12 in wide and 4.36 in deep with free-standing mounting, so compare those dimensions to your enclosure cut-out and clearance.
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