Federal Pacific XM433500 Molded Case Circuit Breaker
- 500A
- 3 Pole
- Bolt-On
Quantity
Federal Pacific XM433500 - 500A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Built for demanding industrial applications, this 500A current-limiting MCCB ensures optimal protection for commercial power networks. The XM frame construction delivers consistent performance in high-capacity electrical environments. Designed as an exact replacement, it mounts into legacy Federal Pacific Fusematic panelboards and switchgear. This preserves existing infrastructure without requiring custom modifications. With a 100 kAIC rating at 480VAC, it rapidly clears severe faults.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | XM433500-R |
| Series | XM |
| Amperage | 500A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 480VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 480VAC |
| Frame Type | XM |
|---|---|
| Terminal Type | Lugs |
| For Use With | Federal Pacific Fusematic Panelboards, Federal Pacific Switchgear |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Lug Kits |
|---|---|
| Accessories | Lugs Not Included |
| Standards | UL 489 |
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, Non-Interchangeable Trip |
| Special Features | Current Limiting |
Product FAQs
6 answersWhich panelboards accept the FPE XM433500 circuit breaker?
This XM-frame breaker is specifically designed to bolt into legacy Federal Pacific Fusematic panelboards and FPE switchgear assemblies.
Is the Federal Pacific XM433500 still manufactured?
No, Federal Pacific Electric (FPE) is no longer in business. The XM433500 is an obsolete legacy breaker used primarily to maintain and service existing FPE Fusematic infrastructure.
How are the line and load connections made on the XM433500?
This breaker features a bolt-on mounting style for the line side, requiring it to be bolted directly to the busbar in compatible FPE equipment. The load side utilizes standard mechanical lugs for cable connections.
What does the LI designation mean for the XM433500 trip unit?
The LI designation indicates a thermal-magnetic trip unit that provides Long-Time (L) protection for sustained overloads and Instantaneous (I) protection for short circuits. Both the thermal and magnetic trip settings are fixed and cannot be adjusted in the field.
What is the benefit of the current-limiting design on the XM433500?
As a current-limiting breaker, it is engineered to clear high-magnitude faults extremely fast. This rapid operation significantly reduces the peak let-through current and thermal energy, protecting downstream circuits and equipment from severe damage.
Can the XM433500 handle high available fault currents?
Yes, this breaker is rated for a maximum interrupting capacity of 100kAIC at both 480VAC and 600VAC, making it highly suitable for industrial facilities with substantial available fault currents.
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