In the complex world of electrical safety, the Westinghouse UL 489 AC Miniature Circuit Breaker stands out with its robust 30 amp, 2-pole configuration and C curve tripping characteristic. Designed to protect electrical circuits from damage caused by excess current, it’s an essential component in commercial and industrial power systems. While primarily used in environments vulnerable to high short-circuit currents, its functionality extends to residential setups needing precise and reliable circuit protection.
For a deeper exploration into this circuit breaker, anticipate an elaborate breakdown of its features, user feedback, comprehensive reviews, demonstration videos, competitive comparisons, and enticing purchase deals.
Westinghouse Model WMBB2C30 Miniature Circuit Breaker, featuring a 30A rating, dual pole, HACR and SWD certifications, ideal for HVAC and commercial electrical applications.
UL489 Certification for Safety: This Westinghouse circuit breaker meets the rigorous standards set by the National Electrical Code, providing reliable protection against thermal overloads and short circuits. It’s certified by Underwriters Laboratories, ensuring top-notch safety and performance for both US and Canada (UL File No. E517928).
Flexible Installation Options: Designed for versatility, this circuit breaker can be conveniently snapped onto 35mm DIN rails or mounted directly onto control panels. It’s an excellent choice for various applications, including motor control circuits, HVAC systems, and OEM equipment, facilitating standard installation processes.
Technical Specifications: The breaker is a 2 Pole, 30A device with a C Curve, capable of handling 480Y/277VAC and 125VDC. It’s rated for 10kA SCCR and is a type of AC Miniature Circuit Breaker, model number WMBB2C30 from Westinghouse. These specifications ensure it meets specific electrical requirements for efficient and safe operation.
Advanced Current Limiting Feature: The Westinghouse DIN rail breakers are engineered to interrupt current flow within the first half of the AC cycle. This quick action is more efficient compared to conventional breakers that may take 1 to 2 AC cycles to interrupt, offering enhanced protection against electrical faults.
Package Contents: Included in your purchase is one two-pole DIN rail circuit breaker. Please note, the DIN rail and installation kit are sold separately, allowing you to customize the installation to your specific setup and needs.
Discover the simplicity of installing devices with our DIN Rail compatible electronic module designed for quick mounting on a standard 35mm rail.
For added convenience and compatibility, model varieties can support up to 480Y/277 VAC and 125 VDC. The compact designs of systems measuring 108mm x 61mm x 17.5mm allow for seamless integration into various setups, providing a blend of efficiency and reliability. Whether the need is for car electronics or household appliances, there is a specific solution to meet each requirement.
Both C-Curve and D-Curve options offer enhanced adaptability for different electrical needs. Additionally, products in this range can handle up to 60A, making them suitable for a wide spectrum of usage scenarios. The larger models, such as those measuring 108mm x 61mm x 35mm and 108mm x 61mm x 52.5mm, provide robust performance while still maintaining a manageable form factor. Optimal for both residential and automotive applications, these solutions ensure durability and high performance.
The Westinghouse circuit breaker featured here is ideal for secure electrical management, certified for 277V AC and 125V DC use, ensuring safety and efficiency in various applications.
In this Video: Discover the Features of Westinghouse Miniature Circuit Breakers
Westinghouse Miniature Circuit Breakers are now available for online purchase and are fully certified for primary branch circuit protection in the U.S. and Canada.
These dual-rated AC and DC breakers are loaded with user-friendly features like captive screws, clear contact position indicators, and lockable switches.
Our breakers boast compatibility with multiple accessories and standard 35mm DIN rails, easy-to-read markings to minimize errors, and IP 20 touch-safe protection.
Emphasizing safety, reliability, and ease of installation, these Westinghouse breakers continue the legacy of a brand powering people since 1886.
Detailed Analysis of Westinghouse 30 Amp Miniature Circuit Breaker Features
Feature
Description
Amperage (30 Amp)
Good
The 30 Amp rating defines the maximum current the circuit breaker can handle without tripping. This is crucial for protecting circuits from overcurrent that can cause wiring to overheat and potentially start a fire. This rating is suitable for moderate to high current applications, making it versatile for both residential and commercial settings.
Poles (2 Pole)
Excellent
A 2-pole circuit breaker like this one is used to control and protect two phases of a circuit and is common in 240V circuits. This dual functionality is essential for ensuring complete disconnection of the circuit, enhancing safety by managing fault in either of the two lines, which is a critical feature for both safety and functionality in electrical systems.
Interrupting Rating (10kA)
Average
The interrupting rating of 10kA indicates the maximum short-circuit current that the breaker can safely interrupt. This is crucial for preventing equipment damage during extreme electrical faults. A 10kA rating is adequate for many residential and some commercial settings but might not suffice in high energy industrial environments where higher ratings are commonly required.
Voltage Rating (480Y/277V AC, 125V DC)
Good
This circuit breaker supports both AC and DC voltages up to 480Y/277V for AC and 125V for DC, which makes it highly versatile for various electrical setups and compatible with both alternating and direct current applications. This feature allows for broader application in different types of electrical systems, adapting to a wide range of voltage requirements.
Thermal Magnetic Trip
Excellent
The thermal magnetic trip feature combines two types of protection; thermal for overload protection and magnetic for short-circuit protection. This dual protection mechanism ensures that the circuit breaker quickly responds to a range of fault conditions, enhancing the safety and longevity of electrical systems by preventing potential damage from both prolonged overloads and sudden high current spikes.
Discover the versatile Westinghouse UL 489 AC miniature circuit breaker, perfect for various applications. With its 30 amp capacity, thermal magnetic trip, and non-polarized design, it ensures reliability and safety. Explore more about similar products here.
Close-up view of a Westinghouse circuit breaker showing voltage ratings and wire compatibility, mounted on a metal rail with connected red wires.
Customer Reviews Analysis: Real Insights on the Westinghouse UL 489 AC Miniature Circuit Breaker
High-Quality Construction and Reliability: Several customers praised the Westinghouse UL 489 Circuit Breaker for its durable build and reliability. Duke, who used it in his off-grid solar battery project, shared that it is “solidly built and should last a long time”. This sentiment is echoed by other users who highlighted its reliability and ability to keep projects safe.
Efficient and Safe Operation: Fed emphasized that the breaker is from a “brand name you actually know is quality”. He found no issues with its operation and noted that it keeps his projects safe. Herm, another satisfied customer, stated it “works well in my RV” and replaced hard-to-find breakers effectively.
Ideal for Specific Applications: axanthic appreciated the breaker’s performance in their van setup, using it as the main breaker for both AC and Shore connection. Although it was a bit pricier and a tight fit during installation, they found it “well built and functions very well”. They valued the added protection offered by the design.
Quality Control Issues: While most reviews are positive, some users have experienced quality control issues. Duke mentioned that the first breaker shipped to him was broken, although he was happy with its operation once he received a functional unit.
Misleading Specifications: One customer, simply named User, expressed dissatisfaction due to the breaker tripping at lower than advertised amperage. The breaker tripped at 40 amps, whereas it was rated for 60 amps. This misrepresentation of specifications could pose significant issues for specific applications.
In summary, the Westinghouse UL 489 AC Miniature Circuit Breaker is generally well-received for its durability, reliability, and performance in specific applications like off-grid projects and RVs. However, there are concerns regarding quality control and misleading specifications, which should be considered before purchasing.
The stars speak of…
Opinions about this product were divided in such a proportion among the buyers.
Five Stars: 91%
Four Stars: 0%
Three Stars: 0%
Two Stars: 0%
One Star: 9%
The most helpful positive feedback Reviewed in the United States on July 15, 2024 by Duke, and is titled “Well built breaker!”
Will use this in my off grid solar battery project, other than the fact that the first one that was shipped to me was broken I am happy with the breaker’s operation. It is solidly built and should last a long time as an extra cutoff point for when I’m doing maintenance on the system.
Customer Rating: 5
Queries & Clarifications: All You Need to Know
What voltage ratings are supported by this circuit breaker?
The Westinghouse miniature circuit breaker supports both AC and DC configurations. It handles up to 480Y/277V AC as well as 125V DC. This flexibility makes it suitable for various electrical setups.
What type of trip mechanism does this circuit breaker use?
This breaker features a thermal magnetic trip mechanism. This ensures reliable protection by combining both thermal and magnetic elements to respond to overcurrent conditions effectively.
Is the circuit breaker compatible with DIN rail mounting?
Yes, the breaker is designed for easy installation on a DIN rail. This common mounting method simplifies the setup and integration into existing systems, making it convenient for users.
How does the C-Curve characteristic affect the performance of this circuit breaker?
The C-Curve characteristic means this breaker is designed to trip at 5-10 times the rated current. It’s suitable for general-purpose protection, accommodating moderate inrush currents usually found in equipment like lighting or small motors.
What are the physical dimensions of this circuit breaker?
The dimensions of this breaker are 4.21 x 1.38 x 2.87 inches, making it compact enough to fit within various electrical panels while still providing robust circuit protection.
Where is this circuit breaker manufactured?
This Westinghouse miniature circuit breaker is manufactured in India. The quality control processes adhere to international standards, ensuring dependable performance and safety.
Is this product UL Listed?
Yes, the breaker is UL Listed, which means it has been tested and meets the safety standards set by Underwriters Laboratories. This certification provides assurance of the product’s reliability and safety.
Explore the safety-oriented design of the Westinghouse circuit breaker, featuring IP20 touch-safe terminals and a range of safety features ensuring reliable and secure operations in electrical installations.Explore the durable Westinghouse Branch Circuit Protective Device featuring a mechanical life of 20,000 cycles and electrical life of 6,000 cycles, designed for optimal performance with copper wires. UL certified for safety and reliability.This image provides precise measurements of an electrical circuit breaker, essential for fitting and technical assessments.
Additional information
Style
2 Pole, 30A, C Curve, 2 Pole, 1A, C Curve, 2 Pole, 2A, C Curve, 2 Pole, 3A, C Curve, 2 Pole, 4A, C Curve, 2 Pole, 5A, C Curve, 2 Pole, 6A, C Curve
Product Dimensions
4.21 x 1.38 x 2.87 inches; 9.14 ounces
Item model number
30 Amp C-Curve
Date First Available
December 2, 2022
Manufacturer
Westinghouse
ASIN
B0BNWDXGC9
Country of Origin
India
Best Sellers Rank
#136,642 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #82 in Miniature Circuit Breakers
6 reviews for Westinghouse 30A 2-Pole Mini Circuit Breaker, C Curve, 10kA, 480Y/277V AC, 125V DC, DIN Rail, UL 489
Rated 5 out of 5
Blair Weiss –
I needed a circuit breaker for a project, the brand name sold me.
I needed a single phase 220v circuit breaker for a project. There are plenty out here on Amazon… but this is electricity in a building that I don’t always occupy. I went with a name I recognized, pure and simple.
Variation: Style: 2 Pole, C Curve / Reviewed in the United States on September 5, 2024
Rated 5 out of 5
Duke –
Well built breaker!
Will use this in my off grid solar battery project, other than the fact that the first one that was shipped to me was broken I am happy with the breaker’s operation. It is solidly built and should last a long time as an extra cutoff point for when I’m doing maintenance on the system.
Reviewed in the United States on July 15, 2024
Rated 1 out of 5
User –
Trips at 40 amps
Trips at 40 ampa
Variation: Style: 2 Pole, 60A, C Curve / Reviewed in the United States on May 11, 2024
Rated 5 out of 5
Fed –
Gets the job done
A brand name you actually know is quality. No issues works great and keeps my projects safe!
Variation: Style: 2 Pole, 60A, C Curve / Reviewed in the United States on February 29, 2024
Rated 5 out of 5
Herm –
Replaces hard to find breakers
Working well in my RV.
Reviewed in the United States on September 27, 2023
Rated 5 out of 5
axanthic –
Mini Breaker for Our Van
Bought this as our main breaker in our van. Looks well built and functions very well, one is for our AC and another for Shore connection breaker. A little pricey compare for others but it’s worth it. Like from another review this is much taller coz of the plastic that divide on top and bottom where the wires go. I see that as added protection yet it did gave me hard time during install, tight fit on the box.
Variation: Style: 2 Pole, 30A, C Curve / Reviewed in the United States on May 19, 2023
Blair Weiss –
I needed a circuit breaker for a project, the brand name sold me.
I needed a single phase 220v circuit breaker for a project. There are plenty out here on Amazon… but this is electricity in a building that I don’t always occupy. I went with a name I recognized, pure and simple.
Duke –
Well built breaker!
Will use this in my off grid solar battery project, other than the fact that the first one that was shipped to me was broken I am happy with the breaker’s operation. It is solidly built and should last a long time as an extra cutoff point for when I’m doing maintenance on the system.
User –
Trips at 40 amps
Trips at 40 ampa
Fed –
Gets the job done
A brand name you actually know is quality. No issues works great and keeps my projects safe!
Herm –
Replaces hard to find breakers
Working well in my RV.
axanthic –
Mini Breaker for Our Van
Bought this as our main breaker in our van. Looks well built and functions very well, one is for our AC and another for Shore connection breaker. A little pricey compare for others but it’s worth it. Like from another review this is much taller coz of the plastic that divide on top and bottom where the wires go. I see that as added protection yet it did gave me hard time during install, tight fit on the box.