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Zinsco Q243015 Molded Case Circuit Breaker
- 15A
- 3 Pole
- Plug-On
Zinsco
Q243015
Molded Case Circuit Breaker
Brand
Zinsco
SKU
Q243015
Quantity
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Zinsco Q243015 - 15A 3 Pole Molded Case Circuit Breaker
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Description
Legacy electrical systems demand precise component matching for continued operation. This 15-amp, three-pole device provides reliable overcurrent protection for commercial applications utilizing classic Zinsco enclosures. It serves as a seamless plug-on replacement for original installations and acts as an alternative to the UBIZ315. The unit mounts into existing panelboards without modifications. Featuring proven thermal-magnetic protection, it incorporates the proprietary Magnetrip design.Specifications
| Brand | Zinsco |
|---|---|
| Part Number | Q243015-R |
| Series | Q |
| Amperage | 15A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Zinsco Load Centers |
| Wire Gauge | 14-8 AWG (Cu/Al) |
| Max Wire | 8 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Accessories | Lugs Not Included |
|---|---|
| Standards | UL 489 |
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | Common Trip |
Product FAQs
6 answersWhich load centers accept the Q243015 circuit breaker?
This breaker is specifically designed for legacy Zinsco panelboards and load centers that require Type Q plug-on breakers. It will not fit in modern panels from other manufacturers.
What is the Connecticut Electric cross-reference for the Zinsco Q243015?
The Connecticut Electric UBIZ315 serves as a direct, newly manufactured replacement for the original Zinsco Q243015. It features the same physical dimensions and plug-on connection for legacy Zinsco enclosures.
How does the Q series breaker connect to the panel busbar?
The Q243015 utilizes a plug-on mounting design that clips directly onto the busbar of compatible Zinsco load centers. It uses the proprietary Magnetrip connection style, which requires no additional mounting hardware.
What should be inspected in the panel before installing a replacement Zinsco breaker?
Before installing the Q243015, thoroughly inspect the panel's busbar for any signs of pitting, arcing, or thermal damage. Legacy Zinsco load centers are known for connection degradation, so a clean and secure busbar connection is essential for safe operation.
What wire types and sizes are supported by the Q243015 terminals?
The breaker lugs are rated for both copper (Cu) and aluminum (Al) conductors. They accept wire sizes ranging from 14 AWG to 8 AWG, allowing flexibility for various branch circuit installations.
What applications typically require the 3-pole configuration of the Q243015?
This 3-pole breaker is used in three-phase electrical systems to protect equipment such as small commercial motors, HVAC units, or light industrial machinery that requires a 240VAC three-phase power supply.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 47 reviews.
Reviews Summary
Generated by AI from 91 most recent customer reviews
Last updated 8/1/25
Customers say these circuit breakers arrive quickly and match their specifications perfectly. Many reviews mention success finding hard-to-locate specialty breakers through this supplier. Common feedback includes praise for the accurate product descriptions, reliable shipping, and competitive pricing. While some note occasional stock limitations, users consistently report the breakers fit and function as intended.
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Rating
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.