---
title: Blog | Mechanical Products
description: Information on over-current and protection terminology, standards, and circuit breakers
---

[![U.S. Manufacturer of Circiut Breakers](https://www.mechprod.com/hs-fs/file-1637183307-png/Mechprod-images/circuit-breakers.png)](https://www.mechprod.com/)

Call:**630.953.4100**  |  Email: [helpme@mechprod.com](mailto:helpme@mechprod.com)

Advanced Design   -   Legendary Performance   -   Superior Circuit Protection   -   Worldwide   -   Count On It

## [Bi-Metal Snap Thermal Circuit Breakers](https://www.mechprod.com/blog-old/bid/299970/bi-metal-snap-thermal-circuit-breakers)

## [Transient Currents in DC and Single-Phase AC Inductive Circuits](https://www.mechprod.com/blog-old/bid/287293/transient-currents-in-dc-and-single-phase-ac-inductive-circuits)

## [Mechanical Products Customer Service Press Release](https://www.mechprod.com/blog-old/pressreleasecustomerserivce)

## [PRODUCT SPOTLIGHT - Series 16](https://www.mechprod.com/blog-old/new-product-release-mechanical-products-short-stop-thermal-circuit-breakers-0-1)

## [Mechanical Products Series 17 High Amp Circuit Breakers](https://www.mechprod.com/blog-old/high-amp-circuit-breakers-series-17)

## [Mechanical Products ShortStop Thermal Circuit Breakers](https://www.mechprod.com/blog-old/new-product-release-mechanical-products-short-stop-thermal-circuit-breakers-0)

## [It's Official! Mechanical Products is ISO 9001:2008 Certified](https://www.mechprod.com/blog-old/mp-iso-2015)

## [ISO 9001:2008](https://www.mechprod.com/blog-old/iso-90012008)

## [Mechanical Products Series 19 Heavy Duty Circuit Breakers](https://www.mechprod.com/blog-old/mp-new-series-19-heavy-duty-circuit-breakers)

## [The Work Truck Show - Visit Mechanical Products, Booth # 5084](https://www.mechprod.com/blog-old/bid/360454/The-Work-Truck-Show-Visit-Mechanical-Products-Booth-5084)

## [American Born, American Made: R2M Holdings' Portfolio](https://www.mechprod.com/blog-old/bid/358241/American-Born-American-Made-R2M-Holdings-Portfolio)

## [Mechanical Products NEW Series 15 Circuit Breakers](https://www.mechprod.com/blog-old/bid/331460/Mechanical-Products-NEW-Series-15-Circuit-Breakers)

## [IBEX 2014 - Visit Mechanical Products Booth 2217 for Marine Breakers](https://www.mechprod.com/blog-old/bid/348368/IBEX-2014-Visit-Mechanical-Products-Booth-2217-for-Marine-Breakers)

## [Circuit Breakers - MP New 17 Series Thermal Circuit Breakers](https://www.mechprod.com/blog-old/bid/335146/Circuit-Breakers-MP-New-17-Series-Thermal-Circuit-Breakers)

## [MECHANICAL PRODUCTS AT CONEXPO/CONAGG](https://www.mechprod.com/blog-old/bid/333026/MECHANICAL-PRODUCTS-AT-CONEXPO-CONAGG)

## [Mechanical Products UL1077 Series 12 Circuit Breakers](https://www.mechprod.com/blog-old/bid/329684/mechanical-products-new-series-12-circuit-breakers)

## [A Simplified Dynamic Arc Circuit Breaker Model](https://www.mechprod.com/blog-old/bid/324550/A-Simplified-Dynamic-Arc-Circuit-Breaker-Model)

## [Arcs in Circuit Breakers](https://www.mechprod.com/blog-old/bid/323693/arcs-in-circuit-breakers)

## [Contact Parting Dynamics in Circuit Breakers](https://www.mechprod.com/blog-old/bid/319525/Contact-Parting-Dynamics-in-Circuit-Breakers)

## [Contacts and Contact Dynamics in Circuit Breakers – Contact Resistance](https://www.mechprod.com/blog-old/bid/318509/Contacts-and-Contact-Dynamics-in-Circuit-Breakers-Contact-Resistance)

## [Delayed Response In Magnetic Circuit Breakers](https://www.mechprod.com/blog-old/bid/315896/Delayed-Response-In-Magnetic-Circuit-Breakers)

## [Eddy Currents](https://www.mechprod.com/blog-old/bid/312115/Eddy-Currents)

## [Time Response of Magnetic Circuit Breakers](https://www.mechprod.com/blog-old/bid/309222/Time-Response-of-Magnetic-Circuit-Breakers)

## [The Detection Threshold Current For Magnetic Circuit Breakers](https://www.mechprod.com/blog-old/bid/307642/The-Detection-Threshold-Current-For-Magnetic-Circuit-Breakers)

## [The Magnetic Circuit](https://www.mechprod.com/blog-old/bid/305036/The-Magnetic-Circuit)

## [Magnetic Force](https://www.mechprod.com/blog-old/bid/301839/Magnetic-Force)

## [Bi-Metal Creep Thermal Circuit Breakers](https://www.mechprod.com/blog-old/bid/297641/Bi-Metal-Creep-Thermal-Circuit-Breakers)

## [Hot Wire Thermal Circuit Breakers](https://www.mechprod.com/blog-old/bid/294569/Hot-Wire-Thermal-Circuit-Breakers)

## [General Concepts of Overcurrent Detection and Circuit Interruption](https://www.mechprod.com/blog-old/bid/292773/General-Concepts-of-Overcurrent-Detection-and-Circuit-Interruption)

## [Start-up Overcurrent Transients in Electrical Equipment](https://www.mechprod.com/blog-old/bid/289603/Start-up-Overcurrent-Transients-in-Electrical-Equipment)

## [Transients in Three-Phase AC Circuits](https://www.mechprod.com/blog-old/bid/288547/transients-in-three-phase-ac-circuits)

## [Electrical Circuit Overcurrent Clearing Times](https://www.mechprod.com/blog-old/bid/284388/Electrical-Circuit-Overcurrent-Clearing-Times)

## [Physics of Electrical Current Interruption](https://www.mechprod.com/blog-old/bid/283180/physics-of-electrical-current-interruption)

## [Overcurrent Protection and Overcurrent Protection Devices](https://www.mechprod.com/blog-old/bid/282266/overcurrent-protection-and-overcurrent-protection-devices)

## [Mechanical Products for Buyers](https://www.mechprod.com/blog-old/bid/272458/Mechanical-Products-for-Buyers)

## [Industrial Floor Care Circuit Breakers](https://www.mechprod.com/blog-old/bid/272394/Industrial-Floor-Care-Circuit-Breakers)

## [Circuit Breaker & Supplementary Protector - Contact Resistance](https://www.mechprod.com/blog-old/bid/256204/Circuit-Breaker-Supplementary-Protector-Contact-Resistance)

## [Looking for a Cooper Bussmann Series 174 Flat-Pak Circuit Breaker?](https://www.mechprod.com/blog-old/bid/253372/Looking-for-a-Cooper-Bussmann-Series-174-Flat-Pak-Circuit-Breaker)

## [Circuit Breaker & Supplementary Protector Contact Mechanisms and Arc Physics](https://www.mechprod.com/blog-old/bid/248919/Circuit-Breaker-Supplementary-Protector-Contact-Mechanisms-and-Arc-Physics)

## [U.S. Circuit Protection Regulatory Agency - Underwriters Laboratories (UL): An Overview](https://www.mechprod.com/blog-old/bid/247761/U-S-Circuit-Protection-Regulatory-Agency-Underwriters-Laboratories-UL-An-Overview)

## [Thermal Overcurrent Protection Devices - Electromechanical Circuit Breakers (UL1077 & UL489)](https://www.mechprod.com/blog-old/bid/238843/Thermal-Overcurrent-Protection-Devices-Electromechanical-Circuit-Breakers-UL1077-UL489)

## [A Selection Methodology for Overcurrent Protection Devices – Fuses and Electromechanical Circuit Breakers (UL1077 & UL489)](https://www.mechprod.com/blog-old/bid/222849/A-Selection-Methodology-for-Overcurrent-Protection-Devices-Fuses-and-Electromechanical-Circuit-Breakers-UL1077-UL489)

## [Low Voltage Overcurrent Protection Devices – Fuses and Electromechanical (UL1077 & UL489 Circuit Breakers)](https://www.mechprod.com/blog-old/bid/222848/low-voltage-overcurrent-protection-devices-fuses-and-electromechanical-ul1077-ul489-circuit-breakers)

## [UL Circuit Breaker versus Supplementary Protector Standards – UL489 v UL1077](https://www.mechprod.com/blog-old/bid/222846/UL-Circuit-Breaker-versus-Supplementary-Protector-Standards-UL489-v-UL1077)

## [UL 1077 Overcurrent Terminology: Ambient Temperature Correction Factor](https://www.mechprod.com/blog-old/bid/222841/ul-1077-overcurrent-terminology-ambient-temperature-correction-factor)

## [UL 1077 Overcurrent Terminology: Overload Rating](https://www.mechprod.com/blog-old/bid/222834/UL-1077-Overcurrent-Terminology-Overload-Rating)

## [UL 1077 Overcurrent Terminology: Trip-Free & Trip-Free, Cycling](https://www.mechprod.com/blog-old/bid/222831/UL-1077-Overcurrent-Terminology-Trip-Free-Trip-Free-Cycling)

## [UL 1077 Overcurrent Terminology](https://www.mechprod.com/blog-old/bid/222827/UL-1077-Overcurrent-Terminology)

## [Differences in UL1077 Short Circuit (SC) Performance Ratings](https://www.mechprod.com/blog-old/bid/222822/differences-in-ul1077-short-circuit-sc-performance-ratings)

## [Differences in UL1077 Overload (OL) Performance Ratings](https://www.mechprod.com/blog-old/bid/222820/Differences-in-UL1077-Overload-OL-Performance-Ratings)

## [Differences in UL1077 Tripping Current (TC) Performance Ratings](https://www.mechprod.com/blog-old/bid/222819/Differences-in-UL1077-Tripping-Current-TC-Performance-Ratings)

## [Critical Qualification Differences in UL1077 Devices](https://www.mechprod.com/blog-old/bid/222817/Critical-Qualification-Differences-in-UL1077-Devices)

## [Circuit Breakers vs. Supplementary Protectors](https://www.mechprod.com/blog-old/bid/222697/Circuit-Breakers-vs-Supplementary-Protectors)

[All posts](https://www.mechprod.com/blog-old/all)

### Follow us!

<https://www.instagram.com/mp_circuit_breakers/><https://www.facebook.com/255072361223049><https://www.linkedin.com/company/991054><https://twitter.com/mechproducts>

### Subscribe by Email

### Latest Posts

### Posts by Month

- [May 2012 (4)](https://www.mechprod.com/blog-old/archive/2012/05)
- [July 2012 (3)](https://www.mechprod.com/blog-old/archive/2012/07)
- [April 2013 (3)](https://www.mechprod.com/blog-old/archive/2013/04)

**Mechanical Products**

**Count on MP for your thermal circuit breaker needs**

Tel: 630.953.4100  |  Fax: 630.953.4110  |  Email: [helpme@mechprod.com](mailto:helpme@mechprod.com)  
**www.mechprod.com**