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Miniature Circuit Breakers

The Safest Circuit Breaker in The Industry!


Product Resources

Product Features

  • 17.5mm wide per pole construction.
  • Includes both thermal and magnetic trip elements.
  • Available in multiple poles, up to 3 plus neutral. Note: Options with Neutral Poles coming soon.
  • 10kA @ 480Y/277V short circuit current rating on all constructions.
  • Operating current configurations from 0.5 to 63 Ampere.
  • Flexible for both AC and DC applications.
  • Dual trip curves: B, C & D.

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Understanding SCCR

When it comes to industrial machinery, it’s critical to ensure that electrical panels are designed and built with the proper SCCR to maintain the system, eliminate downtime and increase worker safety. The goal of this paper is to explain why it is important, and how to find the calculations needed.

Best Protection. Best Value! Same-Day Shipping Guaranteed!

Our new UL 489 & UL 1077 Miniature Circuit Breakers are the safest in the industry and offer efficient, flexible, user-friendly design and functionality.

The Perfect Range of Miniature Circuit Breakers.

Our UL 489 branch circuit breakers and UL 1077 supplementary protectors offer a wide range of pole sizes, amperage ranges, and trip curves – providing superior performance and flexible application environments.

UL 489 Branch Circuit Breakers

  • 17.5mm wide per pole construction
  • Includes both thermal and magnetic trip elements
  • Single pole, single pole + neutral, two pole, three pole, and three pole + neutral
  • Operating current configurations from 0.5 to 63 Ampere
  • Flexible for both AC and DC applications
  • Dual Trip Curves C & D

UL 1077 Supplementary Protectors

  • 17.5mm wide per pole construction
  • Includes both thermal and magnetic trip elements
  • Single pole, single pole + neutral, two pole, three pole, and three pole + neutral
  • Operating current configurations from 0.5 to 63 Ampere
  • Flexible for both AC and DC applications
  • Three trip curve options: B, C & D

Accessories

  • Snap-on accessories are easily installed without the use of tools, lowering assembly and installation costs.
  • Side mounted auxiliary contacts for remote status indication of device connection and a version with an alarm to indicate device tripped.
  • Shunt-trip module for remote tripping and undervoltage/overvoltage module for protection against voltage dips and swells.
  • Lock-off attachment when used with a padlock ensures the security necessary during maintenance activities.

Engineered to a Higher Standard - Delivering the Safest Circuit Breaker in the Industry!

c3controls’ line of Series 1100 UL 489 & UL 1077 Miniature Circuit Breakers provide reliable short circuit and overload protection for all your branch and downstream device circuit protection.

Proven

Our Series 1100 Miniature Circuit Breakers are UL Listed and Recognized, and CE marked to meet global standards requirements and are compliant to RoHS directives.

Short Circuit Current Rating

10kA @ 480Y/277V short circuit current rating on all constructions.

Visible Markings & Status Indication

High visibility labels and markings can be seen from front and side of the device for easy installation. Color-coded status window for clear visual of the breaker status (Green = Tripped, Red = ON).

Added Safety

Line and load side IP20 guarded finger-safe terminals prevent accidental contact with live parts.

Test Drive This Product

Still not sure? We offer free product samples for many of our products. No strings attached. We believe in our products and we think you will too, once you give them a try.

White Papers

A Quick Guide: UL 489 or UL 1077 in Control Panels and Equipment

When is a circuit breaker not a circuit breaker? When it’s a UL 1077 Supplementary Protector. Why? Read this short white paper “UL 489 or UL 1077 in Control Panels and Equipment – A Quick Guide” to understand the differences and when to apply one or the other.

Understanding Trip Curves

Trip Curves for circuit protection devices is one of those subjects that some people steer clear of because they find it somewhat intimidating. One of the best ways to learn something, is to teach it to others. This paper on Understanding Trip Curves is a simplified concept taking out most of the scary math, and focusing on the key information you need to know to understand why trip curves are important, how to read them, and hold an intelligent conversation.

Understanding SCCR or Short-Circuit Current Rating

How do you prevent smoke in an industrial control system? Part of that answer is a thorough understanding of how to select and apply circuit breakers. To do that, you need to understand the concept of Short Circuit Current Ratings, or SCCR. This short white paper from c3controls can help you get started down the path of Understanding SCCR.

Enhance the Value of Your Application with Miniature Circuit Breaker Accessories

A standalone Miniature Circuit Breaker is just a current dependent switch which when tripped will turn itself OFF, interrupting power in case of an overload or short circuit.

Miniature Circuit Breakers can offer much more than just current protection. Read our whitepaper to learn how the use of accessories can turn a single-purpose MCB into a multi-purpose assembly.

Media

Miniature Circuit Breakers – Overview

Our new line of Series 1100 Miniature Circuit Breakers are available in UL 489 and UL 1077 and include both thermal and magnetic trip elements for overload and short circuit protection. They are available in one, one + neutral, two, three, and three + neutral configurations with current ratings from 0.5A to 63A. UL 489 Branch Circuit Breakers provide branch circuit protection and fully meet UL 489 circuit breaker standards. UL 1077 Supplementary Protectors provide downstream device protection and fully meet UL 1077 supplementary protector standards.

Watch this video to learn more about the features and benefits of our new line of UL 489 and UL 1077 Miniature Circuit Breakers.

A Quick Guide – UL 489 or UL 1077 in Control Panels and Equipment

When to use a UL 1077 Supplementary Protector or a UL 489 Branch Circuit Breaker is a common question with machine builders. The general rule is that a UL 489 circuit breaker can protect multiple devices at one time whereas a UL 1077 supplementary protector protects one device. Watch this video to understand the differences between each.

Understanding Trip Curves

What is a trip curve? Simply put, a trip curve is a graphical representation of the expected behavior of a circuit protection device. Choosing the correct trip curve for your application provides reliable circuit protection, while limiting nuisance or false trips. Circuit protection devices come in many forms, including fuses, miniature circuit breakers, molded case circuit breakers, supplementary protectors, motor protection circuit breakers, overload relays, electronic fuses and air circuit breakers.

Watch this video to understand the concept of trip curves and how to read and understand them.

Understanding SCCR or Short-Circuit Current Rating

What is SCCR and why is it important? SCCR stands for Short-Circuit Current Rating. It is the maximum short-circuit current an electrical component can safely withstand without causing a shock or fire hazard. Exceeding the SCCR may cause catastrophic and violent equipment and component failure.

Watch this video to learn why SCCR is important and how to find the calculations needed.

Enhance your Application with Miniature Circuit Breaker Accessories

Learn how our MCB accessories can enhance your application. From Auxiliary Contacts to Lock-off attachments, a simple accessory can change your control panel for the better.