Siemens Q25000S01 Miniature Circuit Breaker
- 50A
- 2 Pole
- Plug-On
Quantity
Siemens Q25000S01 - 50A 2 Pole Miniature Circuit Breaker
New
Quantity
Description
Tailored for commercial facilities, this 50-amp breaker combines standard overcurrent defense with advanced control capabilities. The thermal-magnetic core provides reliable trip functions. Designed for compatibility, the unit mounts into Siemens load centers and P1 panelboards. It serves as an effective substitute for the MP25000S01 in older systems. The standout feature is its factory-installed 120VAC shunt trip mechanism, permitting remote opening of the contacts for emergency shutdowns.Specifications
| Brand | Siemens |
|---|---|
| Series | Q |
| Amperage | 50A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | Q |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Load Centers, Siemens P1 Panelboards |
| Wire Gauge | 8-6 AWG (Cu), 8-4 AWG (Al) |
| Max Wire | 6 AWG (Cu), 4 AWG (Al) |
| Min Wire | 8 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Padlock Attachment |
|---|---|
| Accessories | Shunt Trip 120VAC (Factory Installed) |
| Standards | UL 489, CSA C22.2 No. 5, HACR Rated |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Common Trip |
Product FAQs
8 answersWhat does the "00S01" suffix indicate on the Siemens Q25000S01 circuit breaker?
The "00S01" suffix designates that this breaker includes a factory-installed 120VAC shunt trip mechanism. This allows the breaker to be tripped remotely for emergency shutdowns or control applications.
How is the 120VAC shunt trip wired on this breaker?
The factory-installed shunt trip features its own control wires that exit the breaker housing. These must be connected to a momentary normally open switch or relay and a 120VAC control power source to remotely open the breaker contacts.
Does the shunt trip on the Q25000S01 have an internal clearing contact?
Yes. The factory-installed shunt trip includes an internal series contact that automatically opens the control circuit when the breaker trips, preventing the coil from drawing power after the contacts open.
Which electrical panels are compatible with the Siemens Q25000S01 breaker?
This Type QP plug-on breaker is designed for use in Siemens load centers and Siemens P1 panelboards that accept 2-pole Q-frame breakers.
Can the Siemens Q25000S01 replace an older Murray MP25000S01 breaker?
Yes. Siemens has phased out the Murray brand, and Type QP breakers like the Q25000S01 are the manufacturer-approved replacements for older Murray Type MP-T breakers, including the MP25000S01.
What size wire is required for the load terminals on the Q25000S01?
The load lugs accept 8 to 6 AWG copper wire or 8 to 4 AWG aluminum wire. Always torque the terminals to the manufacturer specifications printed on the breaker label.
What is the temperature rating requirement for conductors connected to this 50A breaker?
Because this is a 50A breaker, it is UL listed for use with 75 degree Celsius rated copper or aluminum conductors.
Is the Siemens Q25000S01 HACR rated for HVAC applications?
Yes, Siemens Type QP breakers are HACR rated, making this 50A breaker suitable for protecting heating, air conditioning, and refrigeration equipment that requires a 50-amp circuit.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 47 reviews.
- CGCrocefissa G.Verified BuyerReviewingSiemens Q115 - 15A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/18/26Quick delivery and great price.
The circuit breakers are at a great cost.
- JBJason B.Verified BuyerReviewingSiemens Q2150B - 150A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/18/26Great experience
The product was exactly what I needed and it arrived on time.
- DQDon Q.Verified BuyerReviewingSiemens Q3100 - 100A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/14/26Siemens breaker
Great customer experience, great prices and fast shipping... Definitely will be buying her again.
- CSChristopher S.Verified BuyerRated 5 out of 5 stars8/12/26Siemens 60
Perfect new condition
- GSGeorge S.Verified BuyerReviewingSiemens Q2150B - 150A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars3/4/26Great service
Every time I call or go online you have the parts I'm looking for.