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Siemens / ITE EF2B150 Molded Case Circuit Breaker
- 150A
- 2 Pole
- Unit Mount
Siemens / ITE
EF2B150
Molded Case Circuit Breaker
Brand
Siemens / ITE
SKU
EF2B150
Quantity
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Siemens / ITE EF2B150 - 150A 2 Pole Molded Case Circuit Breaker
Re-Certified
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Description
A drop-in replacement for commercial systems, the Siemens EF2B150 is a 2-pole, 150A molded case circuit breaker. It provides reliable long-time and instantaneous (LI) protection for 600VAC applications. This legacy E-frame breaker mounts into older ITE and Siemens panelboards. Utilizing this exact match avoids the costly panel modifications required when upgrading to the newer FXD62B150 replacement frame. Rated 14 kAIC at 480VAC, it features fixed thermal-magnetic trip units.Specifications
| Brand | Siemens / ITE |
|---|---|
| Part Number | EF2B150-R |
| Series | EF |
| Amperage | 150A |
| Poles | 2 |
| Mounting Style | Unit Mount |
| Voltage | 600VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 18kA @ 240VAC, 14kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | EF |
|---|---|
| Terminal Type | Lugs |
| For Use With | ITE / Siemens Panelboards |
| 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, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip |
Product FAQs
5 answersWhat panelboards are compatible with the EF2B150 circuit breaker?
The EF2B150 is a legacy E-frame breaker designed for unit mounting in older ITE and Siemens distribution panelboards. Using this exact match avoids the costly panel modifications often required when upgrading to newer replacement frames like the FXD62B150.
Can the EF2B150 be used in DC electrical systems?
Yes, this breaker is rated for up to 250VDC with a 10kA interrupting capacity. This makes it suitable for specific industrial DC control circuits or battery applications requiring a 150A disconnect.
How does the EF2B150 mount into the panelboard?
This is a bolt-on, unit-mount circuit breaker. It is designed to be bolted directly to the bus or mounting pan in compatible ITE and Siemens panelboards, rather than snapping or plugging into place.
Is the EF2B150 still in active production?
No, the EF2B150 is a legacy E-frame breaker originally manufactured by ITE and later by Siemens. While out of active production, exact replacements are still sourced to maintain existing panelboards without requiring retrofits for newer frame types.
Are the trip settings on the EF2B150 adjustable?
No, this breaker features a non-interchangeable thermal-magnetic trip unit. Both the long-time and instantaneous (LI) trip functions are fixed and cannot be adjusted in the field.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 2 reviews.
Total 5 star reviews: 2 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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Rating
2 reviews
- VGVictor G.Verified BuyerRated 5 out of 5 stars11/6/25Breakers fit my needs
I wish I would of shopped this I found exact breaker for 400.00 cheaper
- RFRobert F.ReviewingSiemens EF3A100 - 100A 3 Pole Motor Circuit ProtectorI recommend this productRated 5 out of 5 stars7/25/22Fast order and service for a part in good condition
Fast order and service for a part in good condition.