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Siemens Q350H Miniature Circuit Breaker
- 50A
- 3 Pole
- Plug-On
Siemens
Q350H
Miniature Circuit Breaker
Brand
Siemens
SKU
Q350H
Quantity
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Siemens Q350H - 50A 3 Pole Miniature Circuit Breaker
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Description
Part of the QPH series, the Siemens Q350H is a 3-pole, 50A miniature circuit breaker built for robust electrical protection. It utilizes thermal-magnetic trip technology to defend against overloads and short circuits in commercial or residential settings. This unit mounts into Siemens EQ, PL, ES, and Ultimate load centers. It is also an exact replacement for discontinued Murray MP350 breakers. With a 22kAIC rating at 240V, it safely handles higher fault currents and features Insta-Wire.Specifications
| Brand | Siemens |
|---|---|
| Part Number | Q350H |
| Series | QPH |
| Amperage | 50A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 22kA @ 240VAC |
| Frame Type | Q |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Load Centers, EQ, PL, ES, Ultimate Load Centers |
| Wire Gauge | 8-6 AWG (Cu), 8-4 AWG (Al) |
| Max Wire | 4 AWG |
| Min Wire | 8 AWG |
| 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, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Common Trip, High Interrupting Capacity |
Product FAQs
4 answersWhat is the difference between the Siemens Q350 and the Q350H?
The "H" in the Q350H catalog number designates a high-interrupting-capacity version of the standard QP breaker. The standard Q350 is rated for 10 kAIC, whereas the Q350H is rated for 22 kAIC at 240V. This allows it to be installed in electrical systems with higher available fault currents.
Can the Siemens Q350H replace a discontinued Murray circuit breaker?
Yes. Siemens has phased out the Murray brand and officially cross-lists the QPH series as the UL-listed replacement for legacy Murray MP-HT breakers. The Q350H serves as a direct, code-compliant substitute for the Murray MP350 or MP350H.
Is the Q350H breaker HACR rated?
Yes, the Siemens Q350H carries an HACR rating. It is certified for use with heating, air conditioning, and refrigeration motor loads, ensuring it can handle the inrush currents typical of HVAC equipment without nuisance tripping.
What type of panels accept the Q350H circuit breaker?
The Q350H is a 1-inch per pole plug-on breaker designed for Siemens PL, ES, EQ, and Ultimate load centers. Because Siemens acquired ITE and Murray, this breaker is also the UL-listed replacement for older ITE EQ-P and Murray load centers requiring full-size QP or QPH breakers.
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