Molded Case Circuit Breakers (MCCBs)
| B-Frame | H-Frame | J-Frame | L-Frame |
| 125 A | 150 A | 250 A | 600 A |
| Thermal-Magnetic Unit Mount | Thermal-Magnetic and Electronic | Thermal-Magnetic and Electronic | Electronic Unit Mount |
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| I-Line | I-Line | I-Line | I-Line |
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EZ Selectors are available to simplify selection of PowerPact molded case circuit breakers from 15A - 600A. They provide a quick and easy way to determine catalog number(s) for standard distribution applications
Overview of the MCCB Breaker Family
Useful Links
Video: How to use this EZ Selector
Overview of Breaker Ratings, Frames, and More
Frequently Asked Questions
FA87668 - Where can I get drawings and other data for circuit breakers?
FA90779 - What is the meaning of LI, LSI, and LSIG?
Or check out all our Frequently Asked Questions on our Knowledge Base and find answers to thousands of questions in seconds.
DigestPLUS Online Catalog
Section 7 - Miniature and Molded Case Circuit Breakers
Section 9 - Panelboards – includes I Line circuit breakers
Catalogs & Other Links
Cross Reference Tool - find Schneider Electric equivalents for many obsolete and competitor products.
Selecting a PowerPact Circuit Breaker
- 1. What are the number of Poles - __ 1, 2 or 3 Poles?
- 2. Define application and trip unit technology __ Electronic or Thermal Magnetic?
- 3. Desired trip unit protection functions. __ __ __ __ __ __ __ Note: Most common protection for low voltage systems is Standard LI or Long time and Instantaneous protection. Power Pact Thermal-magnetic breakers provide LI up to 250 A.
- 4. What is the Rated Current -__ Rated current for Main or Branch breaker
- 5. Volts & System -__ 240 / 480 / 600 V
- 6. Interrupting Rating -__ D, G, J, L
- o L: Long Time (Thermal) protection for overloads o S: Short Time protection for short circuits (provides coordination flexibility) o I: Instantaneous protection for short circuits non-adjustable o G: Ground fault protection
Helpful Definitions
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Trip Functionality |
Description |
Breaker Frames |
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Thermal-Magnetic |
Contain individual thermal (overload) and instantaneous (short circuit) sensing elements in each pole. |
B-, H-, J-Frame |
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Electronic Micrologic (Standard) |
Provide adjustable protection settings for greater system flexibility (LI, LSI, LSIG) |
H-, J-, L-Frame |
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Electronic Micrologic (Advanced) |
Adjustable protection setting with type A (ammeter) or E (energy) metering functions as well as communication capability. |
H-, J-, L-Frame |