Siemens QG220 Miniature Circuit Breaker
- 20A
- 2 Pole
- Plug-On
Siemens
QG220
Miniature Circuit Breaker
Brand
Siemens
SKU
QG220
Quantity
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Siemens QG220 - 20A 2 Pole Miniature Circuit Breaker
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Description
Designed for specialized applications, the Siemens QG220 provides 20A of thermal-magnetic protection with a switching neutral mechanism. This 2-pole, 120VAC plug-on breaker simultaneously disconnects the hot and neutral conductors, making it ideal for gas dispensers and commercial installations. It installs into Siemens EQ, PL, ES, and Ultimate load centers, serving as an exact replacement for the MP220SN. It delivers a 10kAIC rating and features a reliable common trip function.Specifications
| Brand | Siemens |
|---|---|
| Series | QG |
| Amperage | 20A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120VAC |
| Frame Type | Q |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens EQ, PL, ES, Ultimate Load Centers |
| Wire Gauge | 14-6 AWG (Cu/Al) |
| Max Wire | 6 AWG |
| Min Wire | 14 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, UL |
| Temp Rating | 40C |
| Construction Features | Switching Neutral, Common Trip, HACR Rated |
| Special Features | Switching Neutral |
Product FAQs
6 answersWhat is the primary application for the Siemens QG220 circuit breaker?
The QG220 features a switching neutral mechanism that simultaneously disconnects both the hot and neutral conductors. This specialized function makes it ideal for gas dispensers, fuel pumps, and specific commercial installations requiring complete circuit isolation.
Can the Siemens QG220 replace a Murray MP220SN breaker?
Yes, the Siemens QG220 is the direct, exact replacement for the obsolete Murray MP220SN switching neutral circuit breaker. It fits the same load centers and provides identical thermal-magnetic protection.
How many panel spaces does the QG220 require in a compatible Siemens load center?
Although it protects a single 120V circuit, the QG220 requires two full panel spaces in Siemens EQ, PL, ES, or Ultimate load centers to accommodate the switching neutral mechanism.
How does the switching neutral function on the QG220 operate?
The switching neutral mechanism ensures that both the hot and neutral conductors are disconnected simultaneously when the breaker trips or is manually turned off. This provides complete circuit isolation, which is a critical safety requirement for equipment like fuel dispensers.
How is the neutral pole wired on the QG220 switching neutral breaker?
The neutral pole of the QG220 does not connect directly to the load center bus bar. Instead, one side of the neutral pole is wired to the panel neutral bar, and the other side connects to the neutral wire of the device being powered.
Is the QG220 considered a Type BG circuit breaker?
Yes, the QG220 is classified by Siemens as a Type BG miniature circuit breaker. This designation indicates its specialized switching neutral design, distinguishing it from standard Type QP breakers.
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