Federal Pacific XJL434400 Molded Case Circuit Breaker
- 400A
- 3 Pole
- Bolt-On
Quantity
Federal Pacific XJL434400 - 400A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Delivering high-capacity fault protection, the Federal Pacific XJL434400 is a 400A, 3-pole current-limiting circuit breaker. It is engineered for demanding commercial and industrial environments. Designed as an exact replacement, this bolt-on MCCB integrates seamlessly into older Federal Pacific switchgear and panelboards. It eliminates the need for complex panel modifications. The Fusematic design incorporates internal fuses, granting an exceptional 150kAIC interrupt rating at 480VAC.Specifications
| Brand | Federal Pacific |
|---|---|
| Series | XJL |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 150kA @ 240VAC, 150kA @ 480VAC, 100kA @ 600VAC |
| Frame Type | XJL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Federal Pacific Switchgear, Federal Pacific Panelboards |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release |
|---|---|
| Accessories | Current Limiting Fuses |
| Standards | UL 489 |
| Approval | UL |
| Temp Rating | 40°C |
| Construction Features | Current Limiting, Fusematic, Internal Fuses, Non-Interchangeable Trip |
| Special Features | Current Limiting (Integrally Fused) |
Product FAQs
7 answersWhat equipment is the Federal Pacific XJL434400 designed to fit?
This breaker is designed for use in legacy Federal Pacific switchgear and panelboards that are configured to accept XJL frame bolt-on breakers.
How does the trip unit on the XJL434400 operate?
It utilizes a thermal-magnetic trip mechanism. The thermal portion provides fixed long-time protection against overloads, while the magnetic portion offers adjustable instantaneous protection against short circuits.
What is the benefit of the current-limiting design on the XJL434400?
Current-limiting breakers clear faults extremely fast. This restricts the peak let-through current and energy, reducing thermal and magnetic stress on downstream electrical components during a severe short circuit.
What is the installation method for the XJL434400?
This breaker uses a bolt-on connection. It must be bolted directly to the busbars in compatible Federal Pacific panelboards or switchgear, ensuring a secure mechanical and electrical connection for 400A applications.
Is the Federal Pacific XJL434400 still actively manufactured?
No, Federal Pacific Electric is no longer in business. The XJL434400 is a legacy component sourced to maintain, repair, or expand existing FPE electrical systems without replacing the entire switchgear.
What is the FPE Fusematic product line?
The XJL434400 is part of the legacy Federal Pacific Fusematic family. These molded case circuit breakers were engineered to provide high interrupting capacities, such as 150kAIC at 480VAC, for demanding industrial applications.
Can I use the XJL434400 to replace any standard FPE breaker?
It must only be installed in Federal Pacific switchgear or panelboards specifically designed to accept XJL frame current-limiting breakers. Always verify the frame size and busbar configuration before installation.
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