Wadsworth B3020NI 30/20A Tandem Miniature Circuit Breaker
- 30/20A
- 1 Pole
- Plug-On
Wadsworth
B3020NI
30/20A Tandem Miniature Circuit Breaker
Brand
Wadsworth
SKU
B3020NI
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Wadsworth B3020NI - 30/20A Tandem Miniature Circuit Breaker
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Description
Built to maximize panel space, this 30/20A twin breaker delivers two separate circuits from a single mounting position. The plug-on design installs into classic Wadsworth load centers, offering a seamless fit for legacy infrastructure. This original equipment model is frequently replaced by the UBIA3020NI. Featuring a 10kAIC interrupt rating at 120VAC, this HACR-rated device utilizes fixed thermal-magnetic trip mechanisms to safeguard against overloads.Specifications
| Brand | Wadsworth |
|---|---|
| Series | B |
| Amperage | 30/20A |
| Poles | 1 |
| Mounting Style | Plug-On |
| Voltage | 120VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120VAC |
| Frame Type | A-NI |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | Wadsworth 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 |
| Special Classification | Tandem |
|---|---|
| Standards | UL 489 |
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Tandem, Class CTL |
Product FAQs
6 answersWhich electrical panels accept the Wadsworth B3020NI tandem breaker?
The B3020NI is a plug-on breaker engineered specifically for legacy Wadsworth Type A load centers. It will not seat correctly or safely in panels from other manufacturers.
What is the modern replacement for the obsolete Wadsworth B3020NI?
Because original Wadsworth equipment is no longer manufactured, electricians often use the Connecticut Electric UBIA3020NI as a direct, code-compliant aftermarket replacement for this 30/20A tandem breaker.
How many panel spaces does the B3020NI require?
As a tandem breaker, it delivers two independent circuits, one 30A and one 20A, while occupying only a single one-inch pole space in the load center.
What does the NI designation mean on the B3020NI breaker?
The NI suffix stands for Non-Interchangeable. This indicates a Class CTL (Circuit Total Limiting) configuration, which prevents the breaker from being installed in panel slots not designed to accept tandem breakers.
What type of wiring is compatible with the B3020NI terminals?
The box lug terminals are rated for both copper and aluminum conductors (Cu/Al), accepting wire gauges from 14 AWG up to 6 AWG.
Is the Wadsworth B3020NI suitable for HVAC applications?
Yes, this thermal-magnetic breaker is HACR rated, meaning it is approved for use with heating, air conditioning, and refrigeration equipment requiring 30A or 20A overcurrent protection.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 106 reviews.
Reviews Summary
Generated by AI from 95 most recent customer reviews
Last updated 3/6/26
Customers say these electrical breakers and components work as expected and arrive quickly. Many reviews mention fast shipping, competitive pricing, and reliable products that fit perfectly. Users find the website easy to navigate and appreciate the wide selection of in-stock items. Common feedback includes satisfaction with timely delivery and professional customer service. While most praise the quality and value, one customer received used breakers instead of new ones as ordered. Overall, reviewers consistently highlight the combination of good prices, fast service, and dependable electrical components.
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106 reviews
- BCBruce C.Verified BuyerReviewingSquare D B28.0 Overload Heater ElementI recommend this productRated 5 out of 5 stars9/9/26Very happy
Product arrived on time and with a great price ..very happy
- BLBOOSTIX L.Verified BuyerReviewingSiemens B230H - 30A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/9/26Fast shipping
thank you for fast ship
- BLBrian L.Verified BuyerReviewingSiemens B220H - 20A 2 Pole Miniature Circuit BreakerI recommend this productRated 4 out of 5 stars9/4/26a
a
- HLHOMETIGO L.Verified BuyerReviewingSiemens B220 - 20A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/12/26Siemens B220 - good breaker
Great!
- JHJamee H.Verified BuyerRated 1 out of 5 stars7/17/26Customer service
I ordered breakers from this company. They were fast and prompt on the initial order. I ended up returning part of the order as I did not need those breakers. To say the very least I am not satisfied with the return process. They do not respond to emails and will not return a phone call. I'm still waiting on the partial refund for these items as their restocking fee is ridiculously high. Please make sure you are buying what you need from this company as the return process is painful ,frustrating and costly.