Siemens / ITE J2B150 Molded Case Circuit Breaker
- 150A
- 2 Pole
- Bolt-On
Quantity
Siemens / ITE J2B150 - 150A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Built for commercial applications, the Siemens J2B150 is a 2-pole, 150A molded case circuit breaker from the legacy J-Frame family. It provides reliable thermal-magnetic protection for aging electrical infrastructure. This bolt-on breaker installs into classic ITE and Siemens FC-1 or S-Series panelboards. It serves as a seamless substitute for the newer JXD62B150, eliminating the need for extensive panel modifications.Specifications
| Brand | Siemens / ITE |
|---|---|
| Part Number | J2B150-R |
| Series | J |
| Amperage | 150A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 1 |
| 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
4 answersWhat panelboards are compatible with the J2B150 circuit breaker?
This legacy J-Frame breaker is designed to bolt directly into classic ITE and Siemens FC-1 and S-Series panelboards, as well as compatible switchboards.
Why use the legacy J2B150 instead of a newer substitute?
Installing the exact-fit J2B150 in older ITE or Siemens enclosures avoids the complex mounting modifications often required when retrofitting newer substitutes like the JXD62B150 or FD62B150.
How does the adjustable magnetic trip function on the J2B150?
While the thermal element provides fixed overload protection, the adjustable magnetic trip unit allows electricians to tune the instantaneous short-circuit response to match specific load requirements and coordination studies.
How is the J2B150 installed in legacy enclosures?
As a bolt-on breaker, it mounts directly to the busbar of compatible FC-1 and S-Series panelboards using standard hardware. No special adapters or retrofit kits are needed when installing it in its native enclosures.
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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?