Siemens FJ63B100 Molded Case Circuit Breaker
- 100A
- 3 Pole
- Bolt-On
Siemens
FJ63B100
Molded Case Circuit Breaker
Brand
Siemens
SKU
FJ63B100
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
Siemens FJ63B100 - 100A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Similar Items
125A 3 Pole Molded Case Circuit Breaker
175A 3 Pole Molded Case Circuit Breaker
200A 3 Pole Molded Case Circuit Breaker
Description
Designed to handle commercial power distribution, the Siemens FJ63B100 provides 100 amps of reliable thermal-magnetic protection. This F-Frame bolt-on circuit breaker mounts into legacy I-T-E enclosures, SB switchboards, and modern P1, P2, or P3 panelboards. It features a fixed thermal and adjustable magnetic trip mechanism, allowing facility managers to fine-tune short-circuit responses. When upgrading infrastructure, the FXD63B100 serves as the recommended modern substitute.Specifications
| Brand | Siemens |
|---|---|
| Series | FJ6 |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 22kA @ 480VAC, 18kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | FJ63 |
|---|---|
| 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, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included |
| 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 FJ63B100 circuit breaker?
This bolt-on breaker is designed for use in Siemens P1, P2, and P3 panelboards, as well as Siemens SB switchboards. It is also backward compatible with legacy I-T-E F-Frame panelboards.
How is the trip unit configured on this FJ6 frame breaker?
It features a thermal-magnetic trip unit with fixed thermal protection for overloads and an adjustable magnetic trip setting. This allows electricians to fine-tune the instantaneous short-circuit response for better system coordination.
Is the FJ63B100 rated for direct current applications?
Yes, in addition to its AC ratings, this breaker is rated for use in DC systems up to 250VDC, providing a 10kA interrupting capacity.
Can this breaker replace older I-T-E F-Frame breakers?
Yes. Siemens acquired I-T-E and maintained the F-Frame physical dimensions. The FJ63B100 can directly replace legacy I-T-E breakers of the same frame size and specifications in existing enclosures.
What type of wire can be used with the standard lugs on this breaker?
The factory-installed lugs accept both copper and aluminum conductors ranging from 6 AWG up to 350 kcmil. Ensure proper torque is applied during installation as specified on the breaker faceplate.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
Same Day Shipping
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.