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Siemens Q320 Miniature Circuit Breaker
- 20A
- 3 Pole
- Plug-On
Siemens
Q320
Miniature Circuit Breaker
Brand
Siemens
SKU
Q320
Quantity
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Siemens Q320 - 20A 3 Pole Miniature Circuit Breaker
New
Quantity
Quantity
Siemens Q320 - 20A 3 Pole Miniature Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | Q320 |
| Series | QP |
| Amperage | 20A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | Q |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Load Centers, Siemens P1 Panelboards |
| Wire Gauge | 14-10 AWG (Cu), 12-10 AWG (Al) |
| Max Wire | 10 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 | HACR Rated, Common Trip, Insta-Wire, Reverse Feed |
Sold out
Quantity
Siemens Q320 - 20A 3 Pole Miniature Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | Q320-R |
| Series | QP |
| Amperage | 20A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | Q |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Load Centers, Siemens P1 Panelboards |
| Wire Gauge | 14-10 AWG (Cu), 12-10 AWG (Al) |
| Max Wire | 10 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 | HACR Rated, Common Trip, Insta-Wire, Reverse Feed |
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Description
Built for residential, commercial, and industrial applications, the Siemens Q320 is a 3-pole, 20-amp miniature circuit breaker. It provides reliable thermal-magnetic protection for 240V systems with a standard 10kAIC rating. This Type QP breaker mounts into Siemens load centers and P1 panelboards using a plug-on connection. It serves as a drop-in replacement for the discontinued Murray MP320. The unit features Insta-Wire technology for faster wiring and is HACR rated for HVAC equipment.Specifications
| Brand | Siemens |
|---|---|
| Part Number | Q320 |
| Series | QP |
| Amperage | 20A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | Q |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Load Centers, Siemens P1 Panelboards |
| Wire Gauge | 14-10 AWG (Cu), 12-10 AWG (Al) |
| Max Wire | 10 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 | HACR Rated, Common Trip, Insta-Wire, Reverse Feed |
Product FAQs
6 answersHow many panel spaces does the Siemens Q320 require?
This 3-pole breaker uses a standard 1-inch per pole QP frame, requiring three consecutive 1-inch spaces (3 inches total width) in a compatible load center or panelboard.
Can this replace an older ITE Q320 circuit breaker?
Yes, Siemens acquired ITE and continues to manufacture this exact QP breaker profile. The modern Siemens Q320 is the direct replacement for legacy ITE Q320 and Gould Q320 models.
Is the Q320 suitable for HVAC equipment?
Yes, this breaker is HACR rated, meaning it is certified for use with heating, air conditioning, and refrigeration equipment that requires a 3-pole 20A circuit breaker.
How does the fixed thermal-magnetic trip function protect the circuit?
The thermal element provides long-time protection by safely disconnecting the circuit during sustained overloads. The magnetic element offers an instantaneous trip response to rapidly clear severe short circuits.
Does the Q320 require time spent loosening lugs before wiring?
No, Siemens QP breakers feature Insta-Wire technology. The terminal screws arrive factory backed out, so you can immediately insert your 14 to 10 AWG copper or 12 to 10 AWG aluminum conductors.
Does this breaker bolt directly to the panel bus?
No, the Q320 is a plug-on miniature circuit breaker. It snaps securely onto the bus bar of compatible Siemens load centers and P1 panelboards without requiring any bolted mounting hardware.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
Total 5 star reviews: 1 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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1 review
- DSDavid S.Rated 5 out of 5 stars8/30/19Breakers
Great service and good prices, fast shipping. Thanks D. S.