Siemens Q270HH Miniature Circuit Breaker
- 70A
- 2 Pole
- Plug-On
Quantity
Siemens Q270HH - 70A 2 Pole Miniature Circuit Breaker
New
Quantity
Description
Part of the Q series, the Siemens Q270HH is a 2-pole, 70-amp miniature circuit breaker built for commercial and industrial applications. It features thermal-magnetic trip technology to deliver reliable overload and short-circuit protection. This Type HQP breaker mounts into compatible Siemens load centers and panelboards. It also serves as an exact, UL-listed replacement for the discontinued Murray MP270HH. With a high interrupting rating of 65 kAIC at 120/240V, it safely clears severe faults.Specifications
| Brand | Siemens |
|---|---|
| Series | Q |
| Amperage | 70A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 65kA @ 120/240VAC |
| Frame Type | Q |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Load Centers, Panelboards |
| Wire Gauge | 4-1/0 AWG (Cu), 2-2/0 AWG (Al) |
| Max Wire | 1/0 AWG (Cu), 2/0 AWG (Al) |
| Min Wire | 4 AWG (Cu), 2 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Padlock Attachment |
|---|---|
| Standards | CSA C22.2 No. 5, HACR Rated, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | High Interrupting Capacity, HACR Rated |
Product FAQs
7 answersWhat panels are compatible with the Siemens Q270HH circuit breaker?
The Q270HH is a plug-in breaker designed for use in Siemens load centers and panelboards that accept QP-frame breakers. Always verify compatibility by checking your panel's wiring diagram or label for approved breaker types, specifically looking for the HQP designation due to its 65kAIC rating.
What does the 'HH' signify in the Q270HH catalog number?
The 'HH' suffix designates this as an HQP type breaker, which carries a high interrupting rating of 65kAIC at 240V. This is significantly higher than standard QP (10kAIC) or QPH (22kAIC) breakers, making it suitable for systems with higher available fault currents.
What wire sizes are accepted by the lugs on the Q270HH?
The lugs on this 70A breaker accept 4 AWG to 1/0 AWG copper (Cu) conductors, or 2 AWG to 2/0 AWG aluminum (Al) conductors. Always ensure conductors are sized appropriately for the 70-amp load per NEC guidelines.
Is the Siemens Q270HH HACR rated?
Yes, Siemens HQP family breakers, including the Q270HH, are HACR rated. This makes them suitable for providing overcurrent protection for heating, air conditioning, and refrigeration equipment.
Can the Siemens Q270HH replace an older ITE Q270HH breaker?
Yes. Siemens acquired ITE, and the current Siemens Q270HH is the direct, UL-listed replacement for legacy ITE HQP breakers with the exact same catalog number.
Can I use the Q270HH for a 120V single-pole circuit?
No. The Q270HH is a 2-pole, common-trip breaker designed for 240V or 120/240V circuits. It cannot be split or used to supply a single 120V load.
What type of trip mechanism does the Q270HH use?
It utilizes a thermal-magnetic trip mechanism with fixed Long-Time and Instantaneous (LI) functions. The thermal element responds to sustained overloads, while the magnetic element provides immediate tripping during short circuits.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 48 reviews.
- DTDawn T.Verified BuyerReviewingSiemens Q2150B - 150A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars10/8/26Timely
This is exactly what I was looking for! Worked perfectly, arrived promptly, no hassles.
- 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