Federal Pacific XM433400 Molded Case Circuit Breaker
- 400A
- 3 Pole
- Bolt-On
Quantity
Federal Pacific XM433400 - 400A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Designed to protect heavy-duty electrical systems, this 400A, 3-pole molded case circuit breaker provides robust thermal-magnetic trip functions. It is engineered specifically for commercial and industrial power distribution. The bolt-on design mounts into Federal Pacific Fusematic panelboards and switchgear. It offers a seamless replacement solution for aging infrastructure. Featuring a 100kAIC rating at 480VAC, the current-limiting technology restricts let-through energy during faults.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | XM433400-R |
| Series | XM |
| Amperage | 400A |
| 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 enclosures are compatible with the XM433400 circuit breaker?
This breaker is engineered specifically for installation in legacy Federal Pacific Fusematic panelboards and Federal Pacific switchgear.
Are the thermal and magnetic trip elements adjustable on this breaker?
No, the XM433400 features a non-interchangeable thermal-magnetic trip unit with fixed long-time and fixed instantaneous (LI) functions.
Is the Federal Pacific XM433400 still in active production?
Federal Pacific Electric (FPE) is no longer in business, making the XM series an obsolete legacy product. It is sourced primarily to maintain and service existing FPE Fusematic infrastructure without requiring a complete panel retrofit.
Can I interchange FPE XM frame and XJL frame circuit breakers?
No. While both belong to the Federal Pacific Fusematic line, they have different physical dimensions. A 3-pole XM frame is significantly taller and wider than an XJL frame, meaning they will not align with the same mounting hardware or bus spacing.
What does the current-limiting designation mean for the XM433400?
As a current-limiting breaker, it is designed to clear high-level faults rapidly, restricting the let-through energy and peak let-through current. This provides enhanced protection for downstream circuits and equipment during a short circuit.
How does the XM433400 connect to the panelboard bus?
It utilizes a standard bolt-on connection to secure directly to the busbars in compatible FPE Fusematic switchgear. Ensure all connections are properly torqued to manufacturer specifications during installation.
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