Siemens Q21520CTNC 15/20/15A Triplex Miniature Circuit Breaker
- 15/20/15A
- 4 Pole
- Plug-On
Siemens
Q21520CTNC
15/20/15A Triplex Miniature Circuit Breaker
Brand
Siemens
SKU
Q21520CTNC
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
Siemens Q21520CTNC - 15/20/15A Triplex Miniature Circuit Breaker
New
Quantity
Similar Items
20A Triplex Miniature Circuit Breaker
15A Triplex Miniature Circuit Breaker
15/40A Triplex Miniature Circuit Breaker
Description
Engineered for residential applications, the Siemens Q21520CTNC is a 4-pole triplex breaker that provides two 15A single-pole circuits and one 20A double-pole circuit. This space-saving configuration allows you to expand capacity in older, fully populated panels. Designed without a rejection clip, this Non-CTL plug-on breaker mounts into pre-1968 Siemens load centers. It serves as an exact replacement for the discontinued MP21520CTNC model.Specifications
| Brand | Siemens |
|---|---|
| Series | QT |
| Amperage | 15/20/15A |
| Poles | 4 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | Q |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Load Centers (Non-CTL / Pre-1968) |
| Wire Gauge | 14-6 AWG (Cu), 12-6 AWG (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 |
| Special Classification | Triplex |
|---|---|
| Available Options | Padlock Attachment |
| Accessories | Non-CTL (No Rejection Clip) |
| Standards | HACR Rated, SWD Rated (15A Poles), UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
Product FAQs
5 answersWhat load centers are compatible with the Siemens Q21520CTNC quad breaker?
This Type QT Non-CTL breaker is designed for older Siemens and ITE load centers built before 1968 that lack a Circuit Total Limiting (CTL) rejection feature. Always verify your panel label to ensure it accepts Type QT Non-CTL breakers.
How are the circuits configured on the Q21520CTNC quad breaker?
This quad breaker provides two independent 1-pole 15A circuits on the outer sections for 120V loads, and one common-trip 2-pole 20A circuit on the inner section for 240V loads.
How much panel space does the Q21520CTNC require?
This quad breaker occupies two standard 1-inch spaces in a compatible load center, providing four poles of protection in a compact 2-inch wide footprint.
Can the Q21520CTNC be installed in a modern Siemens CTL load center?
No. This is a Non-CTL breaker without a rejection clip. Modern panels require CTL breakers to prevent exceeding the maximum number of allowed circuits. Using a Non-CTL breaker in a CTL panel violates electrical codes.
What does the NC designation in the Q21520CTNC part number indicate?
The NC stands for Non-CTL (Circuit Total Limiting). This indicates the breaker does not have a rejection clip and is intended only for older, pre-1968 panels that do not restrict the number of tandem or quad breakers.
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.