Siemens Q290HH Miniature Circuit Breaker
- 90A
- 2 Pole
- Plug-On
Quantity
Siemens Q290HH - 90A 2 Pole Miniature Circuit Breaker
New
Quantity
Description
Rated for 65 kAIC at 120/240V, the Siemens Q290HH is a high-performance 90A, two-pole miniature circuit breaker designed for demanding residential and commercial systems. This plug-on unit installs into standard Siemens load centers and serves as a direct substitute for the discontinued MP290KM. Utilizing proven thermal-magnetic trip technology, it provides reliable long-time and instantaneous protection. The breaker is HACR rated for HVAC equipment and features a common trip mechanism.Specifications
| Brand | Siemens |
|---|---|
| Part Number | Q290HH |
| Series | Q |
| Amperage | 90A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 65kA @ 120/240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens Load Centers |
| Wire Gauge | 4-1/0 AWG (Cu), 2-1/0 AWG (Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 4 AWG (Cu), 2 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Padlock Attachment |
|---|---|
| Standards | CSA C22.2 No. 5, HACR Rated, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Extra High Interrupting Capacity, Common Trip |
Product FAQs
6 answersWhich load centers are compatible with the Q290HH circuit breaker?
This plug-in breaker is designed for use in Siemens PL and ES series load centers. It is also compatible with legacy enclosures that accept Type HQP, QPH, or QP breakers. Always verify compatibility with the wiring diagram on your specific panel.
What is the difference between Siemens Type QP, QPH, and HQP breakers?
The primary difference is the interrupting rating. Type QP is rated at 10kAIC, QPH is rated at 22kAIC, and HQP (like the Q290HH) is rated at 65kAIC. All three types share the same physical dimensions and plug-in mounting style.
When is a 65kAIC breaker like the Q290HH required?
A 65,000 AIC (Ampere Interrupting Capacity) rating is required when the calculated available fault current at the panel exceeds standard 10kAIC or 22kAIC thresholds. This typically occurs in commercial applications or when the service entrance is located in close proximity to a utility transformer.
How much panel space does the Q290HH require for installation?
As a 2-pole Type HQP breaker, it requires two standard 1-inch spaces (2 inches total) on the bus bar of a compatible load center.
How does the thermal-magnetic trip unit in the Q290HH function?
The thermal-magnetic mechanism provides two types of protection. A thermal bimetal element responds to sustained overloads by heating and tripping the breaker, while a magnetic electromagnet provides an instantaneous trip response to severe short circuits.
Can the Q290HH be used to replace older ITE breakers?
Yes, Siemens manufactures the Q290HH as a direct replacement for legacy Siemens and ITE 90A Type HQP breakers. It maintains the exact plug-in configuration and high-interrupting capacity required for those older panels.
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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.