Siemens B2125H00S01 Molded Case Circuit Breaker
- 125A
- 2 Pole
- Bolt-On
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Siemens B2125H00S01 - 125A 2 Pole Molded Case Circuit Breaker
New
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Description
Built for advanced circuit control, the Siemens B2125H00S01 is a 2-pole, 125A BLH series molded case circuit breaker. It provides dependable thermal-magnetic protection for commercial and industrial electrical systems. This unit installs into Siemens P1, P2, P3, P4, and P5 panelboards. The bolt-on mounting style ensures a secure, vibration-resistant connection. It features a 22kAIC rating at 120/240VAC and includes a factory-installed 120VAC shunt trip for remote automated tripping.Specifications
| Brand | Siemens |
|---|---|
| Series | BLH |
| Amperage | 125A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 120/240VAC |
| Phase | 1 |
| AIC Rating | 22kA @ 240VAC, 22kA @ 120/240VAC |
| Frame Type | B |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3, P4, P5 Panelboards |
| Wire Gauge | 2-1/0 AWG (Cu), 1/0-2/0 AWG (Al) |
| Max Wire | 1/0 AWG (Cu), 2/0 AWG (Al) |
| Min Wire | 2 AWG (Cu), 1/0 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Shunt Trip 120VAC (Factory Installed) |
| Standards | CSA C22.2 No. 5, UL 489, NEMA AB 1 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
Product FAQs
7 answersWhat does the 00S01 suffix mean on this Siemens part number?
The 00S01 suffix indicates that the breaker includes a factory-installed 120VAC shunt trip. This internal accessory allows the breaker to be tripped remotely when a 120V control voltage is applied.
How does the factory-installed shunt trip operate on this breaker?
The 120VAC shunt trip allows for remote tripping of the breaker for safety or control purposes. When a 120V signal is applied to the shunt trip leads, it mechanically forces the breaker contacts open to de-energize the circuit.
Can the B2125H00S01 be installed in a standard plug-on load center?
No. This is a bolt-on breaker designed for commercial panelboards like the Siemens P1 through P5 series. It will not fit in standard plug-on residential load centers.
What temperature rating is required for the wire connected to this breaker?
Because this breaker is rated above 50 amps, UL listing requires the use of conductors rated for 75 degrees Celsius.
What is the physical width of this 2-pole breaker?
The B2125H00S01 requires two spaces in the panelboard, taking up a total width of 2 inches, or 1 inch per pole.
Is this breaker suitable for heating, air conditioning, and refrigeration equipment?
Yes, this BLH series breaker is HACR rated, making it suitable for use with heating, air conditioning, and refrigeration motor loads.
Does this breaker provide ground fault or arc fault protection?
No, the B2125H00S01 is a standard thermal-magnetic breaker providing only long-time and instantaneous overcurrent protection. It does not include GFCI or AFCI capabilities.
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