Siemens Q21530CTNC 15/30A Triplex Miniature Circuit Breaker
- 15/30A
- 2 Pole
- Plug-On
Quantity
Siemens Q21530CTNC - 15/30A Triplex Miniature Circuit Breaker
New
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Description
Designed specifically for older distribution systems, this 15/30A Non-CTL triplex breaker provides essential protection. It allows electricians to add circuits to panels that lack modern rejection clip designs. The plug-on unit installs into legacy Siemens load centers that accept Non-CTL breakers. It fits three circuits into a standard two-pole footprint. Operating with a 10kAIC rating, the breaker features a common trip on the center poles. It is HACR rated for heating and cooling equipment.Specifications
| Brand | Siemens |
|---|---|
| Series | Q |
| Amperage | 15/30A |
| Poles | 2 |
| 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) |
| 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 |
| Standards | HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
Product FAQs
7 answersWhat panels are compatible with the Siemens Q21530CTNC circuit breaker?
This Non-CTL triplex breaker is designed for legacy Siemens load centers that accept Type QT breakers without rejection clips. It is typically used in older distribution systems manufactured before 1968 or specific non-CTL panels. Always verify your panel's labeling for Type QT compatibility.
What does the NC in the Q21530CTNC catalog number mean?
The NC stands for Non-CTL (Circuit Total Limiting). This means the breaker lacks a rejection clip and is intended for use in older panels that do not have CTL rejection features. It cannot be installed in modern CTL-rated load centers that require rejection clips.
How many panel spaces does the Q21530CTNC require?
This quad circuit breaker requires two standard one-inch panel spaces. It provides two 15-amp single-pole circuits and one 30-amp double-pole circuit within that compact footprint.
What is the circuit configuration of this triplex breaker?
The Q21530CTNC features two 15-amp single-pole outer circuits for 120V loads and one 30-amp double-pole inner circuit with a common trip for 240V loads.
Does the 30-amp 240V circuit feature a common trip?
Yes, the center 30-amp double-pole circuit features a common trip mechanism. If one leg of the 240V circuit experiences an overload or short circuit, both poles will trip simultaneously to safely disconnect power to the connected equipment.
Can I use this breaker to replace a standard 2-pole breaker to add more circuits?
Yes, if your legacy panel accepts Non-CTL Type QT breakers, this unit can replace a standard two-pole breaker. It maintains a 30-amp 240V circuit while adding two independent 15-amp 120V circuits in the same two-space footprint.
Is the Q21530CTNC suitable for HVAC equipment?
Yes, this breaker is HACR rated, meaning it is approved for use with heating, air conditioning, and refrigeration equipment that requires this specific certification.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 47 reviews.
- CGCrocefissa G.Verified BuyerReviewingSiemens Q115 - 15A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/18/26Quick delivery and great price.
The circuit breakers are at a great cost.
- JBJason B.Verified BuyerReviewingSiemens Q2150B - 150A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/18/26Great experience
The product was exactly what I needed and it arrived on time.
- DQDon Q.Verified BuyerReviewingSiemens Q3100 - 100A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/14/26Siemens breaker
Great customer experience, great prices and fast shipping... Definitely will be buying her again.
- CSChristopher S.Verified BuyerRated 5 out of 5 stars8/12/26Siemens 60
Perfect new condition
- GSGeorge S.Verified BuyerReviewingSiemens Q2150B - 150A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars3/4/26Great service
Every time I call or go online you have the parts I'm looking for.