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About Fuses
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Decipher key specs from your fuse’s label and cross-reference manufacturer part numbers to find a suitable replacement.
Time-Delay Midget Fuses
 |
Able to withstand current overload for a short time, these fuses will not open when exposed to harmless temporary surges, such as when starting a motor. Use them to protect equipment—they are not designed for power distribution circuits. Designed for use with Fuse Blocks for Midget Fuses.
Breakthrough Current @ Voltage—Breakthrough current at voltage, labeled on the fuse as IR, is the maximum current that a fuse can safely stop in the event of a short circuit.
Each | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Current, amp | Voltage, V AC | Breakthrough Current @ Voltage | Overall Lg. | No. of Elements | Cartridge Fuse Type | Fuse Protection Type | With Blown Fuse Indicator | Rejection-Style End | Certification | 1-9 | 10-Up | |||
Manufacturer Equivalent Fuse: ATQ, FLQ, FNQ | ||||||||||||||
13/32" Overall Diameter | ||||||||||||||
| 1/4 | 500 | 10,000 amp @ 500V AC | 1 1/2" | 1 | Ferrule | Time Delay | No | No | UL Listed, CSA Certified | 7713K24 | 000000 | 00000 | ||
| 1/2 | 500 | 10,000 amp @ 500V AC | 1 1/2" | 1 | Ferrule | Time Delay | No | No | UL Listed, CSA Certified | 7713K11 | 00000 | 0000 | ||
| 6/10 | 500 | 10,000 amp @ 500V AC | 1 1/2" | 1 | Ferrule | Time Delay | No | No | UL Listed, CSA Certified | 7713K32 | 00000 | 0000 | ||
| 8/10 | 500 | 10,000 amp @ 500V AC | 1 1/2" | 1 | Ferrule | Time Delay | No | No | UL Listed, CSA Certified | 7713K25 | 00000 | 0000 | ||
| 1 | 500 | 10,000 amp @ 500V AC | 1 1/2" | 1 | Ferrule | Time Delay | No | No | UL Listed, CSA Certified | 7713K12 | 00000 | 0000 | ||
| 1 1/2 | 500 | 10,000 amp @ 500V AC | 1 1/2" | 1 | Ferrule | Time Delay | No | No | UL Listed, CSA Certified | 7713K26 | 00000 | 0000 | ||
| 2 | 500 | 10,000 amp @ 500V AC | 1 1/2" | 1 | Ferrule | Time Delay | No | No | UL Listed, CSA Certified | 7713K13 | 00000 | 0000 | ||
| 2 1/2 | 500 | 10,000 amp @ 500V AC | 1 1/2" | 1 | Ferrule | Time Delay | No | No | UL Listed, CSA Certified | 7713K14 | 00000 | 0000 | ||
| 3 | 500 | 10,000 amp @ 500V AC | 1 1/2" | 1 | Ferrule | Time Delay | No | No | UL Listed, CSA Certified | 7713K33 | 00000 | 0000 | ||
| 3 2/10 | 500 | 10,000 amp @ 500V AC | 1 1/2" | 1 | Ferrule | Time Delay | No | No | UL Listed, CSA Certified | 7713K15 | 00000 | 0000 | ||
| 4 | 500 | 10,000 amp @ 500V AC | 1 1/2" | 1 | Ferrule | Time Delay | No | No | UL Listed, CSA Certified | 7713K16 | 00000 | 0000 | ||
| 5 | 500 | 10,000 amp @ 500V AC | 1 1/2" | 1 | Ferrule | Time Delay | No | No | UL Listed, CSA Certified | 7713K17 | 00000 | 0000 | ||
| 6 1/4 | 500 | 10,000 amp @ 500V AC | 1 1/2" | 1 | Ferrule | Time Delay | No | No | UL Listed, CSA Certified | 7713K18 | 00000 | 0000 | ||
| 7 | 500 | 10,000 amp @ 500V AC | 1 1/2" | 1 | Ferrule | Time Delay | No | No | UL Listed, CSA Certified | 7713K19 | 00000 | 0000 | ||
| 8 | 500 | 10,000 amp @ 500V AC | 1 1/2" | 1 | Ferrule | Time Delay | No | No | UL Listed, CSA Certified | 7713K21 | 00000 | 0000 | ||
| 10 | 500 | 10,000 amp @ 500V AC | 1 1/2" | 1 | Ferrule | Time Delay | No | No | UL Listed, CSA Certified | 7713K22 | 00000 | 0000 | ||
| 12 | 500 | 10,000 amp @ 500V AC | 1 1/2" | 1 | Ferrule | Time Delay | No | No | UL Listed, CSA Certified | 7713K27 | 00000 | 0000 | ||
| 15 | 500 | 10,000 amp @ 500V AC | 1 1/2" | 1 | Ferrule | Time Delay | No | No | UL Listed, CSA Certified | 7713K23 | 00000 | 0000 | ||
| 20 | 500 | 10,000 amp @ 500V AC | 1 1/2" | 1 | Ferrule | Time Delay | No | No | UL Listed, CSA Certified | 7713K28 | 00000 | 0000 | ||
| 25 | 500 | 10,000 amp @ 500V AC | 1 1/2" | 1 | Ferrule | Time Delay | No | No | UL Listed, CSA Certified | 7713K29 | 00000 | 0000 | ||
| 30 | 500 | 10,000 amp @ 500V AC | 1 1/2" | 1 | Ferrule | Time Delay | No | No | UL Listed, CSA Certified | 7713K31 | 00000 | 0000 | ||
Time-Delay Ceramic-Tube Fuses
 |
5mm Dia. |
Able to withstand current overload for a short time, these fuses will not open when exposed to harmless temporary surges. They can withstand temperature swings and high ambient temperatures better than glass-tube fuses. Use them with electronics, control panels, and other sensitive components. Select these fuses by their diameters. Designed for use with Fuse Blocks for Ceramic-Tube Fuses.
Breakthrough Current @ Voltage—Breakthrough current at voltage, labeled on the fuse as IR, is the maximum current that a fuse can safely stop in the event of a short circuit.
Pkg. | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Current, amp | Voltage | Breakthrough Current @ Voltage | Overall Lg., mm | No. of Elements | Fuse Protection Type | With Blown Fuse Indicator | Certification | UL File No. | Pkg. Qty. | 1-9 | 10-Up | |||
Manufacturer Equivalent Fuse: 477 | ||||||||||||||
5 mm Overall Diameter | ||||||||||||||
| 1/2 | 500V AC, 400V DC | 100 amp @ 500V AC 400 amp @ 400V DC | 20 | 1 | Time Delay | No | UL Recognized Component, CE Marked, C-UL Recognized Component | E10480 | 5 | 6986K716 | 000000 | 000000 | ||
| 8/10 | 500V AC, 400V DC | 100 amp @ 500V AC 400 amp @ 400V DC | 20 | 1 | Time Delay | No | UL Recognized Component, CE Marked, C-UL Recognized Component | E10480 | 5 | 6986K717 | 00000 | 00000 | ||
| 1 | 500V AC, 400V DC | 100 amp @ 500V AC 400 amp @ 400V DC | 20 | 1 | Time Delay | No | UL Recognized Component, CE Marked, C-UL Recognized Component | E10480 | 5 | 6986K711 | 00000 | 00000 | ||
| 2 | 500V AC, 400V DC | 100 amp @ 500V AC 400 amp @ 400V DC | 20 | 1 | Time Delay | No | UL Recognized Component, CE Marked, C-UL Recognized Component | E10480 | 5 | 6986K712 | 00000 | 00000 | ||
| 3.15 | 500V AC, 400V DC | 100 amp @ 500V AC 400 amp @ 400V DC | 20 | 1 | Time Delay | No | UL Recognized Component, CE Marked, C-UL Recognized Component | E10480 | 5 | 6986K713 | 00000 | 00000 | ||
| 4 | 500V AC, 400V DC | 100 amp @ 500V AC 400 amp @ 400V DC | 20 | 1 | Time Delay | No | UL Recognized Component, CE Marked, C-UL Recognized Component | E10480 | 5 | 6986K714 | 00000 | 00000 | ||
| 5 | 500V AC, 400V DC | 100 amp @ 500V AC 400 amp @ 400V DC | 20 | 1 | Time Delay | No | UL Recognized Component, CE Marked, C-UL Recognized Component | E10480 | 5 | 6986K715 | 00000 | 00000 | ||
| 6 3/10 | 500V AC, 400V DC | 100 amp @ 500V AC 400 amp @ 400V DC | 20 | 1 | Time Delay | No | UL Recognized Component, CE Marked, C-UL Recognized Component | E10480 | 5 | 6986K811 | 00000 | 00000 | ||
| 8 | 500V AC, 400V DC | 100 amp @ 500V AC 400 amp @ 400V DC | 20 | 1 | Time Delay | No | UL Recognized Component, CE Marked, C-UL Recognized Component | E10480 | 5 | 6986K812 | 00000 | 00000 | ||
| 10 | 500V AC, 400V DC | 100 amp @ 500V AC 400 amp @ 400V DC | 20 | 1 | Time Delay | No | UL Recognized Component, CE Marked, C-UL Recognized Component | E10480 | 5 | 6986K813 | 00000 | 00000 | ||
| 12 | 500V AC, 400V DC | 100 amp @ 500V AC 400 amp @ 400V DC | 20 | 1 | Time Delay | No | UL Recognized Component, CE Marked, C-UL Recognized Component | E10480 | 5 | 6986K814 | 00000 | 00000 | ||
| 16 | 500V AC, 400V DC | 100 amp @ 500V AC 400 amp @ 400V DC | 20 | 1 | Time Delay | No | UL Recognized Component, CE Marked, C-UL Recognized Component | E10480 | 5 | 6986K815 | 00000 | 00000 | ||
European Fuses
 |
These fuses can be used with equipment made in Europe.
Breakthrough Current @ Voltage—Breakthrough current at voltage, labeled on the fuse as IR, is the maximum current that a fuse can safely stop in the event of a short circuit.
Each | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Current, amp | Voltage, V AC | Breakthrough Current @ Voltage | Overall Lg., mm | No. of Elements | Fuse Protection Type | With Blown Fuse Indicator | Certification | 1-9 | 10-Up | |||
Class gL/gG | ||||||||||||
10 mm Overall Diameter | ||||||||||||
| 1 | 500 | 120,000 amp @ 500V AC | 38 | 1 | Fast Acting | No | CE Marked | 5988T11 | 000000 | 000000 | ||
| 2 | 500 | 120,000 amp @ 500V AC | 38 | 1 | Fast Acting | No | CE Marked | 5988T12 | 00000 | 00000 | ||
| 4 | 500 | 120,000 amp @ 500V AC | 38 | 1 | Fast Acting | No | CE Marked | 5988T13 | 00000 | 00000 | ||
| 6 | 500 | 120,000 amp @ 500V AC | 38 | 1 | Fast Acting | No | CE Marked | 5988T14 | 00000 | 00000 | ||
| 8 | 500 | 120,000 amp @ 500V AC | 38 | 1 | Fast Acting | No | CE Marked | 5988T15 | 00000 | 00000 | ||
| 10 | 500 | 120,000 amp @ 500V AC | 38 | 1 | Fast Acting | No | CE Marked | 5988T16 | 00000 | 00000 | ||
| 12 | 500 | 120,000 amp @ 500V AC | 38 | 1 | Fast Acting | No | CE Marked | 5988T17 | 00000 | 00000 | ||
| 16 | 500 | 120,000 amp @ 500V AC | 38 | 1 | Fast Acting | No | CE Marked | 5988T18 | 00000 | 00000 | ||
| 20 | 500 | 120,000 amp @ 500V AC | 38 | 1 | Fast Acting | No | CE Marked | 5988T19 | 00000 | 00000 | ||
| 25 | 500 | 120,000 amp @ 500V AC | 38 | 1 | Fast Acting | No | CE Marked | 5988T21 | 00000 | 00000 | ||
Fast-Acting Ceramic-Tube Fuses
 |
1/4" Dia. |
These fuses open circuits quickly when surges are detected. They can withstand temperature swings and high ambient temperatures better than glass-tube fuses. Use with electronics, control panels, and other sensitive components. Select these fuses by their diameters. Designed for use with Fuse Blocks for Ceramic-Tube Fuses.
1/4" Overall Diameter—1/4" dia. fuses can be used in high-current electronic circuits such as microwave ovens.
Breakthrough Current @ Voltage—Breakthrough current at voltage, labeled on the fuse as IR, is the maximum current that a fuse can safely stop in the event of a short circuit.
Pkg. | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Fuse Trade Size | Voltage | Breakthrough Current @ Voltage | Overall Lg. | No. of Elements | Fuse Protection Type | With Blown Fuse Indicator | Certification | Current, amp | Pkg. Qty. | 1-9 | 10-Up | |||
Manufacturer Equivalent Fuse: 505 | ||||||||||||||
1/4" Overall Diameter | ||||||||||||||
| 3AB | 500V AC, 500V DC | 30,000 amp @ 500V AC 20,000 amp @ 500V DC | 1 1/4" | 1 | Fast Acting | No | UL Recognized Component, C-UL Recognized Component | 16 | 5 | 71385K811 | 000000 | 000000 | ||
| 3AB | 500V AC, 500V DC | 30,000 amp @ 500V AC 20,000 amp @ 500V DC | 1 1/4" | 1 | Fast Acting | No | UL Recognized Component, C-UL Recognized Component | 20 | 5 | 71385K812 | 00000 | 00000 | ||
| 3AB | 500V AC, 500V DC | 30,000 amp @ 500V AC 20,000 amp @ 500V DC | 1 1/4" | 1 | Fast Acting | No | UL Recognized Component, C-UL Recognized Component | 25 | 5 | 71385K813 | 00000 | 00000 | ||
| 3AB | 500V AC, 500V DC | 30,000 amp @ 500V AC 20,000 amp @ 500V DC | 1 1/4" | 1 | Fast Acting | No | UL Recognized Component, C-UL Recognized Component | 30 | 5 | 71385K814 | 00000 | 00000 | ||
Fuses for Sensitive Electronics
 |  |
Ferrule Cartridge Fuse | Knife-Blade Cartridge Fuse |
With a quicker response than standard fast-acting fuses, these fuses provide the best protection for sensitive electronics.
Breakthrough Current @ Voltage—Breakthrough current at voltage, labeled on the fuse as IR, is the maximum current that a fuse can safely stop in the event of a short circuit.
Current, amp | Voltage, V AC | Breakthrough Current @ Voltage | Overall Lg. | No. of Elements | Cartridge Fuse Type | Fuse Protection Type | With Blown Fuse Indicator | Rejection-Style End | Certification | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Manufacturer Equivalent Fuse: A50QS, FWH, L50S | |||||||||||||
9/16" Overall Diameter | |||||||||||||
| 10 | 500 | 200,000 amp @ 500V AC | 2" | 1 | Ferrule | Fast Acting | No | No | UL Recognized Component | 74475K311 | 000000 | ||
| 20 | 500 | 200,000 amp @ 500V AC | 2" | 1 | Ferrule | Fast Acting | No | No | UL Recognized Component | 74475K312 | 00000 | ||
| 30 | 500 | 200,000 amp @ 500V AC | 2" | 1 | Ferrule | Fast Acting | No | No | UL Recognized Component | 74475K313 | 00000 | ||
13/16" Overall Diameter | |||||||||||||
| 40 | 500 | 200,000 amp @ 500V AC | 3 3/16" | 1 | Knife Blade | Fast Acting | No | No | UL Recognized Component | 74475K321 | 00000 | ||
| 50 | 500 | 200,000 amp @ 500V AC | 3 3/16" | 1 | Knife Blade | Fast Acting | No | No | UL Recognized Component | 74475K322 | 00000 | ||
| 60 | 500 | 200,000 amp @ 500V AC | 3 3/16" | 1 | Knife Blade | Fast Acting | No | No | UL Recognized Component | 74475K323 | 00000 | ||
15/16" Overall Diameter | |||||||||||||
| 80 | 500 | 200,000 amp @ 500V AC | 3 5/8" | 1 | Knife Blade | Fast Acting | No | No | UL Recognized Component | 74475K341 | 00000 | ||
| 100 | 500 | 200,000 amp @ 500V AC | 3 5/8" | 1 | Knife Blade | Fast Acting | No | No | UL Recognized Component | 74475K342 | 00000 | ||
1 3/16" Overall Diameter | |||||||||||||
| 125 | 500 | 200,000 amp @ 500V AC | 3 5/8" | 1 | Knife Blade | Fast Acting | No | No | UL Recognized Component | 74475K344 | 000000 | ||
| 150 | 500 | 200,000 amp @ 500V AC | 3 5/8" | 1 | Knife Blade | Fast Acting | No | No | UL Recognized Component | 74475K345 | 000000 | ||
| 200 | 500 | 200,000 amp @ 500V AC | 3 5/8" | 1 | Knife Blade | Fast Acting | No | No | UL Recognized Component | 74475K343 | 000000 | ||
1 1/2" Overall Diameter | |||||||||||||
| 300 | 500 | 200,000 amp @ 500V AC | 4 5/16" | 1 | Knife Blade | Fast Acting | No | No | UL Recognized Component | 74475K351 | 000000 | ||
| 400 | 500 | 200,000 amp @ 500V AC | 4 5/16" | 1 | Knife Blade | Fast Acting | No | No | UL Recognized Component | 74475K352 | 000000 | ||
2" Overall Diameter | |||||||||||||
| 600 | 500 | 200,000 amp @ 500V AC | 4 5/16" | 1 | Knife Blade | Fast Acting | No | No | UL Recognized Component | 74475K353 | 000000 | ||
European Milk Bottle Fuses
 |  |
Style A | Style B |
 |  |
Style C | Style D |
Each | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Style | Current, amp | Voltage, V AC | Breakthrough Current @ Voltage | Overall Lg., mm | Tip Dia., mm | No. of Elements | Fuse Protection Type | With Blown Fuse Indicator | 1-4 | 5-Up | |||
Class gL | |||||||||||||
21.5 mm Overall Diameter | |||||||||||||
| A | 2 | 500 | 100,000 amp @ 500V AC | 50 | 6 | 1 | Fast Acting | No | 6981K31 | 000000 | 000000 | ||
| A | 4 | 500 | 100,000 amp @ 500V AC | 50 | 6 | 1 | Fast Acting | No | 6981K32 | 00000 | 00000 | ||
| A | 6 | 500 | 100,000 amp @ 500V AC | 50 | 6 | 1 | Fast Acting | No | 6981K33 | 00000 | 00000 | ||
| A | 10 | 500 | 100,000 amp @ 500V AC | 50 | 8 | 1 | Fast Acting | No | 6981K34 | 00000 | 00000 | ||
| A | 16 | 500 | 100,000 amp @ 500V AC | 50 | 10 | 1 | Fast Acting | No | 6981K35 | 00000 | 00000 | ||
| A | 20 | 500 | 100,000 amp @ 500V AC | 50 | 12 | 1 | Fast Acting | No | 6981K36 | 00000 | 00000 | ||
| B | 25 | 500 | 100,000 amp @ 500V AC | 50 | 14 | 1 | Fast Acting | No | 6981K37 | 00000 | 00000 | ||
27 mm Overall Diameter | |||||||||||||
| B | 35 | 500 | 100,000 amp @ 500V AC | 50 | 16 | 1 | Fast Acting | No | 6981K41 | 00000 | 00000 | ||
| B | 50 | 500 | 100,000 amp @ 500V AC | 50 | 18 | 1 | Fast Acting | No | 6981K42 | 00000 | 00000 | ||
| B | 63 | 500 | 100,000 amp @ 500V AC | 50 | 20 | 1 | Fast Acting | No | 6981K43 | 00000 | 00000 | ||
Class gL/gG | |||||||||||||
21.5 mm Overall Diameter | |||||||||||||
| C | 2 | 500 | 75,000 amp @ 500V AC | 50 | 6 | 1 | Fast Acting | Yes | 6981K81 | 0000 | 0000 | ||
| C | 4 | 500 | 75,000 amp @ 500V AC | 50 | 6 | 1 | Fast Acting | Yes | 6981K82 | 0000 | 0000 | ||
| C | 6 | 500 | 75,000 amp @ 500V AC | 50 | 6 | 1 | Fast Acting | Yes | 6981K83 | 0000 | 0000 | ||
| C | 10 | 500 | 75,000 amp @ 500V AC | 50 | 8 | 1 | Fast Acting | Yes | 6981K84 | 0000 | 0000 | ||
| C | 16 | 500 | 75,000 amp @ 500V AC | 50 | 10 | 1 | Fast Acting | Yes | 6981K85 | 0000 | 0000 | ||
| C | 20 | 500 | 75,000 amp @ 500V AC | 50 | 12 | 1 | Fast Acting | Yes | 6981K86 | 0000 | 0000 | ||
| D | 25 | 500 | 75,000 amp @ 500V AC | 50 | 14 | 1 | Fast Acting | Yes | 6981K87 | 0000 | 0000 | ||
27 mm Overall Diameter | |||||||||||||
| D | 35 | 500 | 75,000 amp @ 500V AC | 50 | 16 | 1 | Fast Acting | Yes | 6981K91 | 00000 | 00000 | ||
| D | 50 | 500 | 75,000 amp @ 500V AC | 50 | 18 | 1 | Fast Acting | Yes | 6981K92 | 00000 | 00000 | ||
| D | 63 | 500 | 75,000 amp @ 500V AC | 50 | 20 | 1 | Fast Acting | Yes | 6981K93 | 00000 | 00000 | ||
UL Class CC Time-Delay Midget Fuses for Transformers
 |
Designed to handle high inrush currents and the initial current cycle unique to transformers, these fuses provide comparable performance with a smaller footprint than standard size fuses. Use them to protect power distribution branch circuits. They’re for use with Fuse Blocks for UL Class CC Fuses.
Breakthrough Current @ Voltage—Breakthrough current at voltage, labeled on the fuse as IR, is the maximum current that a fuse can safely stop in the event of a short circuit.
Each | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Current, amp | Fuse UL Class | Voltage, V AC | Breakthrough Current @ Voltage | Overall Lg. | No. of Elements | Cartridge Fuse Type | Fuse Protection Type | With Blown Fuse Indicator | Rejection-Style End | Certification | 1-9 | 10-Up | |||
Manufacturer Equivalent Fuse: ATQ, FLQ, FNQ | |||||||||||||||
13/32" Overall Diameter | |||||||||||||||
| 1 4/10 | CC | 500 | 10,000 amp @ 500V AC | 1 1/2" | 1 | Ferrule | Time Delay | No | No | UL Listed | 7714K722 | 000000 | 000000 | ||
