Federal Pacific HM632300 Molded Case Circuit Breaker
- 300A
- 3 Pole
- Bolt-On
Quantity
Federal Pacific HM632300 - 300A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Part of the legacy HM series, the Federal Pacific HM632300 is a 3-pole, 300A molded case circuit breaker for commercial and industrial distribution. This bolt-on MCCB installs into existing Federal Pacific switchgear. It serves as an exact replacement for the discontinued NM632300, keeping facilities operational without costly panel upgrades. Rated for 600VAC with a 35kAIC capacity at 240V, it features an interchangeable trip design and includes load-side lugs.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | HM632300-R |
| Series | HM |
| Amperage | 300A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 600VAC |
| Phase | 3 |
| AIC Rating | 35kA @ 240VAC, 22kA @ 480VAC, 22kA @ 600VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Federal Pacific Switchgear / Panelboards |
| Wire Gauge | 1/0 AWG - 600 kcmil |
| Max Wire | 600 kcmil |
| Min Wire | 1/0 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Undervoltage Release, Auxiliary Switch |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40°C |
| Construction Features | Interchangeable Trip |
Product FAQs
6 answersWhat equipment is the Federal Pacific HM632300 designed to fit?
The HM632300 is a bolt-on molded case circuit breaker designed specifically for legacy Federal Pacific switchgear and panelboards configured for H-frame breakers.
What wire sizes are accepted by the load side lugs on the HM632300?
The factory lugs on this 300-amp breaker accommodate wire sizes ranging from 1/0 AWG up to 600 kcmil. Always verify that your conductor material and insulation temperature ratings align with the breaker and enclosure specifications.
How does the trip unit on the HM632300 operate?
It utilizes a thermal-magnetic trip unit with Long-Time and Instantaneous (LI) functions. The thermal element provides fixed overload protection at 300 amps, while the magnetic element is adjustable, allowing installers to set the instantaneous short-circuit pickup level for motor inrush or selective coordination.
Are there direct cross-references for the Federal Pacific HM632300?
Yes. After acquiring Federal Pacific's molded case breaker line, Challenger manufactured this exact H-frame breaker under the same HM632300 catalog number. Both versions are physically and electrically identical for use in legacy FPE panelboards.
Is the HM632300 part of the Federal Pacific Stab-Lok series?
No. The HM632300 is an industrial-grade, bolt-on molded case circuit breaker from the H-frame family. It is designed for commercial and industrial switchgear, completely separate from the residential Stab-Lok plug-on design.
How is the HM632300 secured inside the panelboard?
This is a bolt-on circuit breaker. It requires bolted connections to the panelboard busbars, providing a secure, vibration-resistant connection suitable for industrial environments compared to standard plug-on designs.
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