Siemens / ITE J3B225 Molded Case Circuit Breaker
- 225A
- 3 Pole
- Bolt-On
Quantity
Siemens / ITE J3B225 - 225A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Part of the legacy J-frame series, this 225-amp molded case circuit breaker provides reliable thermal-magnetic protection for commercial and industrial applications. It features a bolt-on mounting style designed specifically for older ITE and Siemens FC-1 or S-Series panelboards and switchboards. Rated for up to 600VAC with a 25kA interrupting capacity at 240V, it offers a seamless drop-in solution. For modern upgrades, this unit is officially replaced by the newer JXD63B225 model.Specifications
| Brand | Siemens / ITE |
|---|---|
| Part Number | J3B225-R |
| Series | J |
| Amperage | 225A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | J |
|---|---|
| Terminal Type | Lugs |
| For Use With | ITE/Siemens Panelboards (FC-1, S-Series), Switchboards |
| Wire Gauge | 4 AWG - 300 kcmil (Cu/Al) |
| Max Wire | 300 kcmil |
| Min Wire | 4 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. 5.1, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40°C |
| Construction Features | Quick-Make/Quick-Break, Trip-Free Mechanism |
Product FAQs
7 answersWhich panelboards accept the J3B225 circuit breaker?
This bolt-on J-frame breaker is designed specifically for legacy ITE and Siemens FC-1 and S-Series panelboards, as well as compatible switchboards.
What does the LI trip function indicate on this breaker?
The LI designation means the thermal-magnetic trip unit features fixed Long-Time protection for overloads and adjustable Instantaneous protection for short circuits. The adjustable magnetic dial allows electricians to tune the short-circuit response to avoid nuisance tripping from motor inrush currents.
What are the lug wire size limits for the J3B225?
The factory lugs accept 4 AWG to 300 kcmil copper or aluminum conductors. When terminating aluminum wire, always use an approved oxide-inhibiting joint compound to prevent corrosion and ensure a secure connection.
Is the ITE J3B225 a current production model?
No, the J3B225 is a legacy J-frame molded case circuit breaker. It is typically sourced as a direct replacement to maintain or expand existing FC-1 or S-Series panelboards without requiring a full panel upgrade.
Is the J3B225 rated for DC voltage systems?
Yes, in addition to its AC ratings, the J3B225 is rated for up to 250V DC with a 10kA interrupting capacity. This allows it to be used in industrial DC control panels or battery backup systems.
How is the J3B225 installed in a panelboard?
It features a bolt-on mounting style. The breaker terminals bolt directly to the panelboard busbars, providing a secure, low-resistance connection suitable for 225A continuous loads.
What are the AC interrupting ratings for the J3B225?
The breaker provides a 25kAIC rating at 240V AC, 18kAIC at 480V AC, and 14kAIC at 600V AC. Always verify the available fault current at the installation point to ensure these ratings meet your system requirements.
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Reviews
Review summary
Customers rate this product 4.5 out of 5 based on 2 reviews.
- CSCHARLES S.Verified BuyerRated 5 out of 5 stars10/15/26SALES REP
SQD IS A GREAT PRODUCT
- MCMARK C.Verified BuyerReviewingITE/Siemens J20M Control RelayI recommend this productRated 4 out of 5 stars2/4/26it control relay but it was just the coil for the relay. do you have a J20A40 CONTACTS?
it control relay but it was just the coil for the relay. do you have a J20A40 CONTACTS?