Siemens FJ63B225 Molded Case Circuit Breaker
- 225A
- 3 Pole
- Bolt-On
Quantity
Siemens FJ63B225 - 225A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Designed to protect industrial power systems, this 225-amp, 3-pole circuit breaker utilizes fixed thermal and magnetic trip elements. It provides essential defense against overloads and short circuits in commercial environments. This F-Frame unit is engineered for bolt-on installation in Siemens P1, P2, and P3 panelboards, along with SB switchboards. It serves as a functional equivalent to the FD63B225 and is replaced by the FXD63B225.Specifications
| Brand | Siemens |
|---|---|
| Part Number | FJ63B225-R |
| Series | FJ6 |
| Amperage | 225A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 22kA @ 480VAC, 18kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens P1, P2, P3 Panelboards, SB Switchboards, I-T-E F-Frame Panelboards |
| Wire Gauge | 6 AWG - 350 kcmil (Cu/Al) |
| Max Wire | 350 kcmil |
| Min Wire | 6 AWG |
| 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, Alarm Switch |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip |
Product FAQs
5 answersWhich panelboards are compatible with the FJ63B225 circuit breaker?
This F-Frame breaker is designed for bolt-on installation in Siemens P1, P2, and P3 panelboards, as well as SB switchboards and legacy I-T-E F-Frame panelboards.
Is the Siemens FJ63B225 still manufactured, or is there a direct replacement?
The FJ63B225 is a legacy F-Frame breaker. It is functionally equivalent to the FD63B225 and has been replaced by the newer FXD63B225 molded case circuit breaker.
What wire sizes are accepted by the lugs on this breaker?
The standard lugs on this 225A breaker accept 6 AWG to 350 kcmil copper or aluminum wire.
Can the FJ63B225 be used in DC voltage applications?
Yes, this thermal magnetic breaker is rated for use in DC applications up to 250VDC, with a maximum interrupting capacity of 10kA at 250VDC.
How does this breaker mount into the panel?
The FJ63B225 is a bolt-on circuit breaker, meaning it secures directly to the panelboard bus using bolted connections rather than plugging in.
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