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Siemens EF3B015 Molded Case Circuit Breaker
- 15A
- 3 Pole
- Bolt-On
Siemens
EF3B015
Molded Case Circuit Breaker
Brand
Siemens
SKU
EF3B015
Quantity
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Siemens EF3B015 - 15A 3 Pole Molded Case Circuit Breaker
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Description
Designed for heavy-duty applications, this 15-amp Siemens MCCB delivers thermal magnetic protection across three phases. The E-Frame breaker is engineered to handle commercial circuits against overloads and short circuits. Featuring a secure bolt-on mounting style, it fits into legacy I-T-E panelboards and modern Siemens P-series load centers. Facility managers can use this unit to replace aging EF3B015 breakers. It provides a 14kAIC interrupt rating at 480V and is HACR rated.Specifications
| Brand | Siemens |
|---|---|
| Part Number | EF3B015-R |
| Series | EF |
| Amperage | 15A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 18kA @ 240VAC, 14kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | EF |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3 Panelboards, Legacy I-T-E Panelboards |
| Wire Gauge | 14-10 AWG (Cu), 12-10 AWG (Al) |
| Max Wire | 10 AWG |
| Min Wire | 14 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, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Lugs |
| Standards | NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip |
Product FAQs
6 answersWhat panelboards are compatible with the EF3B015?
This bolt-on breaker is designed for installation in Siemens P1, P2, and P3 panelboards, as well as legacy I-T-E panelboards.
Does the EF3B015 require specific mounting hardware?
Yes, installing this E-frame breaker in Siemens P-series or legacy I-T-E panelboards requires the appropriate strap kit or twin mounting kit specific to the panelboard type.
Is the Siemens EF3B015 interchangeable with the I-T-E EF3B015?
Yes. Siemens acquired I-T-E and continued manufacturing the EF frame under the Siemens brand. The breakers share the same physical dimensions and electrical characteristics.
What is the modern replacement for the discontinued EF frame?
The Siemens ED frame is the modern standard replacement for the obsolete EF frame series. Depending on the existing panelboard, retrofit adapter hardware may be required to match the legacy footprint.
Are the thermal and magnetic trip settings adjustable on the EF3B015?
No, the EF3B015 features a fixed thermal and fixed magnetic trip unit. The Long-Time and Instantaneous trip functions cannot be field-adjusted.
What safety precautions are required when replacing an EF3B015?
De-energize and lock out the panelboard before removing or installing the breaker. Verify that the panelboard enclosure is rated for EF frame standard depth devices and ensure all bolt-on connections are properly torqued to manufacturer specifications.
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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.