Siemens J3B150 Molded Case Circuit Breaker
- 150A
- 3 Pole
- Bolt-On
Quantity
Siemens J3B150 - 150A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Built for commercial and industrial power distribution, the Siemens J3B150 is a 3-pole, 150A legacy J-Frame MCCB. It features fixed thermal and adjustable magnetic trip settings. This bolt-on unit installs into Siemens P4 and P5 panelboards, switchboards, and motor control centers. It is replaced by the FXD63B150, which requires an FD frame mounting kit. It is rated for 25kAIC at 240VAC and 14kAIC at 600VAC. The breaker is HACR rated and includes line and load lugs.Specifications
| Brand | Siemens |
|---|---|
| Part Number | J3B150-R |
| Series | J |
| Amperage | 150A |
| 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 | Siemens P4, P5 Panelboards, Switchboards, Motor Control Centers |
| 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, Padlock Attachment, Motor Operator, Rotary Handle |
|---|---|
| Accessories | Line and Load Lugs Included |
| Standards | CSA C22.2 No. 5, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated |
Product FAQs
6 answersWhich panelboards are compatible with the Siemens J3B150 circuit breaker?
The J3B150 is designed for use in Siemens P4 and P5 panelboards, switchboards, and motor control centers. It is also a direct fit for legacy ITE FC-1 panelboards.
What is the adjustable magnetic trip range for the J3B150?
This J-frame breaker features a fixed thermal and adjustable magnetic trip unit. The instantaneous magnetic trip can be adjusted from 750A to 1600A.
What wire sizes are accepted by the lugs on the J3B150 breaker?
The factory lugs accept copper or aluminum conductors ranging from 4 AWG to 300 kcmil.
Are the Siemens J3B150 and ITE J3B150-R the same breaker?
Yes. Siemens acquired ITE, and this legacy J-frame molded case circuit breaker is commonly listed under both brands. J3B150-R is a recognized alternate catalog number for this exact unit.
Can the J3B150 be used in DC electrical systems?
Yes, this thermal magnetic breaker is rated for DC applications up to 250VDC, providing an interrupting capacity of 10kA at that voltage.
How does the J3B150 mount into the panelboard?
This is a bolt-on circuit breaker that secures directly to the panelboard bus using bolted connections, ensuring a secure and reliable contact for commercial and industrial applications.
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Reviews
Review summary
Customers rate this product 4.0 out of 5 based on 1 review.
- 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?