Siemens QG330 Miniature Circuit Breaker
- 30A
- 3 Pole
- Plug-On
Quantity
Siemens QG330 - 30A 3 Pole Miniature Circuit Breaker
New
Quantity
Description
Part of the QP family, the Siemens QG330 delivers 30A of thermal-magnetic protection alongside a specialized switching neutral. This 3-pole, 120/240VAC plug-on breaker is engineered to disconnect both ungrounded conductors and the neutral wire at the same time, ensuring compliance in commercial settings. It easily installs into Siemens EQ, PL, ES, and Ultimate load centers, replacing the older MP330SN model. Rated at 10kAIC, it provides dependable common trip functionality and HACR ratings.Specifications
| Brand | Siemens |
|---|---|
| Series | QG |
| Amperage | 30A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| 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
7 answersWhich Siemens load centers accept the QG330 breaker?
The QG330 is approved for plug-in installation in Siemens EQ, PL, ES, and Ultimate Load Centers. Always verify the panel labeling for Q-frame compatibility prior to installation.
What wire sizes and materials are supported by the QG330 terminals?
The mechanical lugs accept 14 AWG to 6 AWG conductors and are rated for both copper (Cu) and aluminum (Al) wiring.
How does the LI trip function operate on this breaker?
The thermal-magnetic mechanism provides Long-Time (L) protection for sustained overloads and an Instantaneous (I) trip response to quickly clear severe short circuits.
Is it safe to install the QG330 in a non-Siemens load center?
No. Installing this breaker in a panel from another manufacturer can result in poor bus bar connections, void the UL listing, and introduce fire hazards. It must only be used in approved Siemens enclosures.
What is the purpose of the switching neutral feature on the QG330?
This breaker is required for applications where all conductors, including the neutral, must be disconnected simultaneously. The third pole safely opens the neutral circuit when the breaker trips or is manually turned off.
Can a standard 3-pole QP breaker replace the QG330?
No. While they share the same physical plug-in footprint, a standard QP breaker does not switch the neutral. The QG330 must be used when local codes require a switching neutral disconnect, such as in fuel dispensing equipment.
How is the neutral pole wired on the QG330?
The neutral pole does not connect to the energized bus bar. During installation, one side of the neutral pole is wired directly to the panel neutral bar, and the other side connects to the neutral wire of the load device.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
Same Day Shipping
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.