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Siemens Q330H Miniature Circuit Breaker
- 30A
- 3 Pole
- Plug-On
Siemens
Q330H
Miniature Circuit Breaker
Brand
Siemens
SKU
Q330H
Quantity
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Siemens Q330H - 30A 3 Pole Miniature Circuit Breaker
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Description
Engineered for commercial and industrial distribution, this 30A thermal-magnetic breaker delivers enhanced short-circuit protection. The plug-on design installs into Siemens EQ, PL, ES, and Ultimate load centers, offering a high-capacity upgrade for older Murray MP330 installations. With a 22kAIC rating at 240VAC, it includes Insta-Wire connections and a common trip function for reliable three-phase safety.Specifications
| Brand | Siemens |
|---|---|
| Part Number | Q330H |
| Series | QPH |
| Amperage | 30A |
| 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 | 14-6 AWG (Cu), 12-6 AWG (Al) |
| Max Wire | 6 AWG |
| Min Wire | 14 AWG (Cu), 12 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, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | Common Trip, HACR Rated, High Interrupting Capacity |
Product FAQs
6 answersWhich load centers are compatible with the Siemens Q330H circuit breaker?
This plug-on breaker is designed for use in Siemens PL, ES, EQ, and Ultimate series load centers. It is also compatible with older ITE load centers that accept Type QP breakers.
What does the "H" in the Q330H catalog number indicate?
The "H" designates a high interrupting rating. While standard QP breakers are rated at 10kAIC, the Q330H provides a 22kAIC rating for systems with higher available fault current.
How much panel space does the Q330H require?
This 3-pole breaker requires three standard 1-inch spaces in a compatible three-phase load center.
Can the Siemens Q330H replace an older ITE Q330H breaker?
Yes. Siemens acquired ITE, and the current Siemens Q330H is the direct, manufacturer-approved replacement for legacy ITE breakers with the same catalog number.
Is this breaker a suitable replacement for Murray MP330 or MP330H breakers?
Yes. Siemens acquired Murray, and Type QP breakers like the Q330H are the exact, UL-listed replacements for legacy Murray Type MP-T breakers.
Can I install the Q330H in a single-phase residential panel?
No. The Q330H is a 3-pole breaker designed exclusively for three-phase systems. It will not fit or function correctly in a standard single-phase residential load center.
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