Holiday Operations Update: United Fuses will be closed Monday, January 19 in observance of Martin Luther King Jr. Day.
UPS will also be closed — no pickups or deliveries that day.
Operations and shipping will resume Tuesday, January 20.

Products

14560 products

14560 products

A50QS100-4 Mersen Low Voltage Fuse
500V 100A Fuse - Essential Electric Supply

A50QS100-4 Mersen Low Voltage Fuse
500V 100A Fuse - Essential Electric Supply

Cutler Hammer A50QS100-4 - Low Voltage Current-Limiting Fuse 100A (200kA AIC @ 500V)

Cutler Hammer A50QS100-4R - Class A50QS Current-Limiting Fuse 100A (200kA AIC @ 500V)

A50QS1200-4 Mersen Amp-Trap Low Voltage Fuse
500V 1200A Fuse - Essential Electric Supply

A50QS1200-4 Mersen Amp-Trap Low Voltage Fuse
500V 1200A Fuse - Essential Electric Supply

Cutler Hammer A50QS1200-4 - Class A50QS Fuse 1200A 500V (200kA AIC Rating)

A50QS125-4 Ferraz Shawmut Amp-Trap Low Voltage Fuse
500V 125A Fuse - Essential Electric Supply

A50QS125-4 Ferraz Shawmut Amp-Trap Low Voltage Fuse
500V 125A Fuse - Essential Electric Supply

Cutler Hammer A50QS125-4 - Low Voltage Current-Limiting Fuse 125A (200kA AIC @ 500V)

Cutler Hammer A50QS125-4R - Amp-Trap Current Limiting Fuse 125A (200kA AIC @ 500V)

Cutler Hammer A50QS15-1 - Current-Limiting Fuse 15A (200kA AIC @500V)

A50QS150-4 Mersen Low Voltage Fuse
500V 150A Fuse - Essential Electric Supply

A50QS150-4 Mersen Low Voltage Fuse
500V 150A Fuse - Essential Electric Supply

Cutler Hammer A50QS150-4 - Low Voltage Current-Limiting Fuse 150A (200kA AIC @ 500V)

Cutler Hammer A50QS150-4R - Amp-Trap Current-Limiting Fuse 150A (200kA AIC @ 500V)

A50QS175-4 Mersen Amp-Trap Low Voltage Fuse
500V 175A Fuse - Essential Electric Supply

A50QS175-4 Mersen Amp-Trap Low Voltage Fuse
500V 175A Fuse - Essential Electric Supply

Cutler Hammer A50QS175-4 - Current Limiting Fuse 175A (200kA AIC @ 500V)

Cutler Hammer A50QS175-4R - Class A50QS Fuse 175A (200kA AIC @ 500V)

A50QS200-4 Mersen Low Voltage Fuse
500V 200A Fuse - Essential Electric Supply

A50QS200-4 Mersen Low Voltage Fuse
500V 200A Fuse - Essential Electric Supply

Cutler Hammer A50QS200-4 - Low Voltage Fuse 200A (200kA AIC @ 500V)

Cutler Hammer A50QS200-4R - Current Limiting Fuse 200A (200kA AIC @ 500V)

A50QS225-4 Mersen Low Voltage Fuse
500V 225A Fuse - Essential Electric Supply

A50QS225-4 Mersen Low Voltage Fuse
500V 225A Fuse - Essential Electric Supply

Cutler Hammer A50QS225-4 - Low Voltage Current-Limiting Fuse 225A (200kA AIC @ 500V)

A50QS25-1 Mersen Amp-Trap Low Voltage Fuse
500V 25A Fuse - Essential Electric Supply

A50QS25-1 Mersen Amp-Trap Low Voltage Fuse
500V 25A Fuse - Essential Electric Supply

Cutler Hammer A50QS25-1 - Class A50QS Fuse 25A (200kA AIC @ 500V)

A50QS250-4 Mersen Low Voltage Fuse
500V 250A Fuse - Essential Electric Supply

A50QS250-4 Mersen Low Voltage Fuse
500V 250A Fuse - Essential Electric Supply

Cutler Hammer A50QS250-4 - Low Voltage Fuse 250A (200kA AIC @ 500V)

Cutler Hammer A50QS250-4R - Class A50QS Fuse 250A (200kA AIC @ 500V)

A50QS275-4 Mersen Amp-Trap Low Voltage Fuse
500V 275A Fuse - Essential Electric Supply

A50QS275-4 Mersen Amp-Trap Low Voltage Fuse
500V 275A Fuse - Essential Electric Supply

Cutler Hammer A50QS275-4 - Low Voltage Current-Limiting Fuse 275A (200kA AIC @ 500V)

A50QS300-4 Mersen Amp-Trap Low Voltage Fuse
500V 300A Fuse - Essential Electric Supply

A50QS300-4 Mersen Amp-Trap Low Voltage Fuse
500V 300A Fuse - Essential Electric Supply

Cutler Hammer A50QS300-4 - Low Voltage Current-Limiting Fuse 300A (200kA AIC @ 500V)

Cutler Hammer A50QS300-4R - Current Limiting Fuse 300A (200kA AIC @ 500V)

A50QS325-4 Mersen Amp-Trap Low Voltage Fuse
500V 325A Fuse - Essential Electric Supply

A50QS325-4 Mersen Amp-Trap Low Voltage Fuse
500V 325A Fuse - Essential Electric Supply

Cutler Hammer A50QS325-4 - Class A50QS Fuse 325A (200kA AIC @ 500V)

A50QS35-4 Ferraz Shawmut Low Voltage Fuse
500V 35A Fuse - Essential Electric Supply

A50QS35-4 Ferraz Shawmut Low Voltage Fuse
500V 35A Fuse - Essential Electric Supply

Cutler Hammer A50QS35-4 - Low Voltage Fuse 35A (200kA AIC @ 500V)

A50QS350-4 Mersen Amp-Trap Low Voltage Fuse
500V 350A Fuse - Essential Electric Supply

A50QS350-4 Mersen Amp-Trap Low Voltage Fuse
500V 350A Fuse - Essential Electric Supply

Cutler Hammer A50QS350-4 - Amp-Trap Class A50QS Fuse 350A (200kA AIC @ 500V)

A50QS40-4 Ferraz Shawmut Amp-Trap Low Voltage Fuse
500V 40A Fuse - Essential Electric Supply

A50QS40-4 Ferraz Shawmut Amp-Trap Low Voltage Fuse
500V 40A Fuse - Essential Electric Supply

Cutler Hammer A50QS40-4 - Class A50QS Current-Limiting Fuse 40A (200kA AIC @ 500V)

A50QS400-4 Mersen Low Voltage Fuse
500V 400A Fuse - Essential Electric Supply

A50QS400-4 Mersen Low Voltage Fuse
500V 400A Fuse - Essential Electric Supply

Cutler Hammer A50QS400-4 - Class L Fuse 400A (200kA AIC @ 500V)

A50QS450-4 Mersen Amp-Trap Low Voltage Fuse
500V 450A Fuse - Essential Electric Supply

A50QS450-4 Mersen Amp-Trap Low Voltage Fuse
500V 450A Fuse - Essential Electric Supply

Cutler Hammer A50QS450-4 - Amp-Trap Class A50QS Fuse 450A (200kA AIC @ 500V)

A50QS500-4 Mersen Amp-Trap Low Voltage Fuse
500V 500A Fuse - Essential Electric Supply

A50QS500-4 Mersen Amp-Trap Low Voltage Fuse
500V 500A Fuse - Essential Electric Supply

Cutler Hammer A50QS500-4 - Current-Limiting Fuse 500A (200kA AIC @ 500V)

A50QS60-4 Mersen Low Voltage Fuse
500V 60A Fuse - Essential Electric Supply

A50QS60-4 Mersen Low Voltage Fuse
500V 60A Fuse - Essential Electric Supply

Cutler Hammer A50QS60-4 - Class J Fuse 60A 500V (200kA AIC)

A50QS600-4 Mersen Low Voltage Fuse
500V 600A Fuse - Essential Electric Supply

A50QS600-4 Mersen Low Voltage Fuse
500V 600A Fuse - Essential Electric Supply

Cutler Hammer A50QS600-4 - Low Voltage Current-Limiting Fuse 600A (200kA AIC @ 500V)

A50QS70-4 Mersen Low Voltage Fuse
500V 70A Fuse - Essential Electric Supply

A50QS70-4 Mersen Low Voltage Fuse
500V 70A Fuse - Essential Electric Supply

Cutler Hammer A50QS70-4 - Class J Time-Delay Fuse 70A (200kA AIC @ 500V)

A50QS700-4 Mersen Low Voltage Fuse
500V 700A Fuse - Essential Electric Supply

A50QS700-4 Mersen Low Voltage Fuse
500V 700A Fuse - Essential Electric Supply

Cutler Hammer A50QS700-4 - Low Voltage Current-Limiting Fuse 700A (200kA AIC @ 500V)

A50QS80-4 Mersen Low Voltage Fuse
500V 80A Fuse - Essential Electric Supply

A50QS80-4 Mersen Low Voltage Fuse
500V 80A Fuse - Essential Electric Supply

Cutler Hammer A50QS80-4 - Low Voltage Fuse 80A 500V (200kA AIC)

Cutler Hammer A50QS80-4R - Class A50QS Fuse 80A (200kA AIC @ 500V)

A50QS800-4 Mersen Low Voltage Fuse
500V 800A Fuse - Essential Electric Supply

A50QS800-4 Mersen Low Voltage Fuse
500V 800A Fuse - Essential Electric Supply

Cutler Hammer A50QS800-4 - Low Voltage Current-Limiting Fuse 800A (200kA AIC @ 500V)

A50QS90-4 Mersen Amp-Trap Low Voltage Fuse
500V 90A Fuse - Essential Electric Supply

A50QS90-4 Mersen Amp-Trap Low Voltage Fuse
500V 90A Fuse - Essential Electric Supply

Cutler Hammer A50QS90-4 - Low Voltage Current-Limiting Fuse 90A (200kA AIC @ 500V)

A50QS900-4 Mersen Amp-Trap Low Voltage Fuse
500V 900A Fuse - Essential Electric Supply

A50QS900-4 Mersen Amp-Trap Low Voltage Fuse
500V 900A Fuse - Essential Electric Supply

Cutler Hammer A50QS900-4 - Class A50QS Current-Limiting Fuse 900A (200kA AIC @ 500V)

Cutler Hammer A550X100E-1 - Medium Voltage Fuse 100A (5500V, 63kA AIC)

A550X10E-1 Ferraz Shawmut||Mersen CS-3 Series Medium Voltage - Essential Electric Supply

Cutler Hammer A550X10E-1 - Medium Voltage Fuse 10A 5500V (63kA AIC, Class E)

Cutler Hammer A550X150E-1 - Medium Voltage Fuse 150A (5500V, 63kA AIC)

Cutler Hammer A550X15E-1 - Medium Voltage Fuse 15A (63kA AIC @ 5.5kV)

A550X200E-1 Ferraz Shawmut||Mersen CS-3 Series Medium Voltage - Essential Electric Supply

Cutler Hammer A550X200E-1 - Medium Voltage Fuse 200A (5500V, 63kA AIC)

1 … 113 114 115 116 117 … 364

Recently viewed

Same-day Shipping Available

Same-day Delivery Availabile

24/7 Customer Support

Subscribe today to hear first about our sales

United Fuses is here to ensure you get the right part, delivered on time, to keep your operations running smoothly and efficiently!

Get in touch

Disclaimer: United Fuses supplies new, used, surplus, and re-certified products. We are not affiliated with, authorized by, or officially representing any of the brands we offer. While most products from United Fuses include our own 2-year warranty, they do not come with the original manufacturer’s warranty. All trademarks, brand names, and logos are the property of their respective owners. This website is not endorsed, sponsored, or approved by any manufacturer or tradename mentioned. Copying, reproducing, linking, framing, scraping, spidering, automated bots, or transferring website content to other platforms or networked systems for any purpose is strictly prohibited.

© 2026 United Fuses Powered by Shopify

Products