Siemens REF3B015 EF3B015 - 15A 3 Pole Molded Case Circuit Breaker
- 15A
- 3 Pole
- Bolt-On
Siemens
REF3B015
EF3B015 - 15A 3 Pole Molded Case Circuit Breaker
Brand
Siemens
SKU
REF3B015
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Siemens EF3B015 - 15A 3 Pole Molded Case Circuit Breaker
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Description
Built for commercial distribution, the Siemens REF3B015 is a 15A, 3-pole molded case circuit breaker from the legacy E-Frame family. It utilizes non-interchangeable thermal-magnetic trip technology to safeguard circuits against overloads and short circuits. This bolt-on breaker integrates into older Siemens and ITE switchboards. It replaces the original EF3B015 and can be substituted by the ED63B015. The unit is rated 18kAIC at 240VAC and 14kAIC at 480VAC, complete with load side lugs.Specifications
| Brand | Siemens |
|---|---|
| Part Number | REF3B015-R |
| Series | EF |
| Amperage | 15A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 18kA @ 240VAC, 14kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens / ITE Panelboards, Switchboards |
| 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, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | UL 489, CSA C22.2 No. 5 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip |
Product FAQs
6 answersWhich panelboards accept the EF3B015 circuit breaker?
This bolt-on E-frame breaker is designed for installation in legacy Siemens and ITE panelboards, as well as compatible switchboards.
What is the modern replacement for the obsolete EF3B015?
The EF3B015 is a legacy E-frame breaker. For a modern 15A, 3-pole, 600VAC equivalent, the Siemens ED63B015 is the direct replacement.
How is the EF3B015 connected to the panelboard?
It features a bolt-on mounting style for the line side, which fastens directly to the panelboard bus. The load side includes standard lug terminals.
What wire gauges are compatible with the EF3B015 load lugs?
The load side lugs accept 14 to 10 AWG copper conductors or 12 to 10 AWG aluminum conductors.
Is the EF3B015 suitable for direct current systems?
Yes, in addition to its AC ratings, this breaker is rated for 250VDC applications with a 10kA interrupting capacity.
How does the trip mechanism function on the EF3B015?
It utilizes a fixed thermal-magnetic trip unit providing long-time and instantaneous (LI) protection. The trip unit is non-interchangeable.
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