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Siemens Q2150BH Molded Case Circuit Breaker
- 150A
- 2 Pole
- Plug-On
Siemens
Q2150BH
Molded Case Circuit Breaker
Brand
Siemens
SKU
Q2150BH
Quantity
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Siemens Q2150BH - 150A 2 Pole Molded Case Circuit Breaker
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Description
Built for residential and commercial applications, the Siemens Q2150BH provides 150 amps of reliable circuit protection. This two-pole molded case circuit breaker features a 22 kAIC interrupt rating at 120/240VAC and utilizes a fixed thermal-magnetic trip unit for long-time and instantaneous defense. It mounts into compatible Siemens load centers and meter combinations, requiring four panel spaces for installation. The unit serves as an exact substitute for the legacy MPD2150RH breaker.Specifications
| Brand | Siemens |
|---|---|
| Part Number | Q2150BH |
| Series | Q |
| Amperage | 150A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 22kA @ 120/240VAC |
| Frame Type | Q |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Load Centers, Meter Combos |
| Wire Gauge | 1/0 AWG - 3/0 AWG (Cu/Al) |
| Max Wire | 3/0 AWG |
| Min Wire | 1/0 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | High Interrupting Capacity, Common Trip, HACR Rated, Main Breaker |
Product FAQs
7 answersHow many panel spaces does the Siemens Q2150BH require?
Due to its 150A capacity and physical footprint, the Q2150BH requires four standard panel spaces for installation in compatible Siemens load centers and meter combinations.
Which legacy circuit breaker does the Siemens Q2150BH replace?
This unit serves as an exact substitute for the legacy Murray MPD2150RH circuit breaker.
What wire sizes are accepted by the lugs on the Q2150BH?
The included load side lugs accept 1/0 AWG to 3/0 AWG copper or aluminum conductors. Ensure proper torque specifications are followed during installation to prevent terminal overheating.
Is the Q2150BH compatible with non-Siemens electrical panels?
No. The Q2150BH is designed and UL listed exclusively for use in compatible Siemens load centers and meter combinations. Installing it in other panel brands violates UL listings and compromises safety.
What does the 22kAIC rating on the Q2150BH indicate?
While standard residential breakers often feature a 10kAIC rating, the 22kAIC rating on this unit means it can safely interrupt up to 22,000 amps of fault current. This higher capacity is often required for commercial applications or homes located close to utility transformers.
Does the Q2150BH feature an adjustable trip setting?
No, this breaker utilizes a fixed thermal magnetic trip unit. It provides factory-calibrated long-time and instantaneous protection and cannot be manually adjusted in the field.
Is the Q2150BH suitable for use with HVAC equipment?
Yes, this breaker is HACR rated, meaning it is certified for use with heating, air conditioning, and refrigeration equipment that requires dedicated circuit protection.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 47 reviews.
Reviews Summary
Generated by AI from 91 most recent customer reviews
Last updated 8/1/25
Customers say these circuit breakers arrive quickly and match their specifications perfectly. Many reviews mention success finding hard-to-locate specialty breakers through this supplier. Common feedback includes praise for the accurate product descriptions, reliable shipping, and competitive pricing. While some note occasional stock limitations, users consistently report the breakers fit and function as intended.
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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.