UL Class UL Class |
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Fuse Type Fuse Type |
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![]() | Cartridge |
Cartridge Fuse Style Cartridge Fuse Style |
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Protection Type Protection Type |
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Breakthrough Current Breakthrough Current |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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Rejection-Style End Rejection-Style End |
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Blown Fuse Indicator Blown Fuse Indicator |
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Number of Elements Number of Elements |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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About Fuses
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UL Class T Fuses for Extra-Tight Spaces

Ferrule Style

Knife-Blade Style
Smaller than UL Class J fuses, these fast-acting fuses can be used in extra-tight spaces such as meters, uninterruptible power supplies, and variable-speed drives. They open circuits quickly when surges are detected. Use with Fuse Blocks for UL Class T Fuses.
Breakthrough current, also known as interrupt current, is the maximum current that a fuse can safely stop in the event of a short circuit.
For technical drawings and 3-D models, click on a part number.
Overall | Each | |||||||||
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Current, A | Voltage | Breakthrough Current | Lg. | Dia. | No. of Elements | Cartridge Fuse Style | Specifications Met | 1-9 | 10-Up | |
Manufacturer Equivalent: A3T, JJN, JLLN | ||||||||||
3 | 300V AC | 200,000 A @ 300 V AC | 7/8" | 7/16" | 1 | Ferrule | UL Listed, CSA Certified, CE Marked | 000000000 | 000000 | 000000 |
10 | 300V AC | 200,000 A @ 300 V AC | 7/8" | 7/16" | 1 | Ferrule | UL Listed, CSA Certified, CE Marked | 000000000 | 00000 | 00000 |
15 | 300V AC/160V DC | 20,000 A @ 160 V DC 200,000 A @ 300 V AC | 7/8" | 7/16" | 1 | Ferrule | UL Listed, CSA Certified, CE Marked | 000000000 | 00000 | 00000 |
20 | 300V AC/160V DC | 20,000 A @ 160 V DC 200,000 A @ 300 V AC | 7/8" | 7/16" | 1 | Ferrule | UL Listed, CSA Certified, CE Marked | 000000000 | 00000 | 00000 |
30 | 300V AC/160V DC | 20,000 A @ 160 V DC 200,000 A @ 300 V AC | 7/8" | 7/16" | 1 | Ferrule | UL Listed, CSA Certified, CE Marked | 000000000 | 00000 | 00000 |
35 | 300V AC/160V DC | 20,000 A @ 160 V DC 200,000 A @ 300 V AC | 7/8" | 9/16" | 1 | Ferrule | UL Listed, CSA Certified, CE Marked | 000000000 | 00000 | 00000 |
40 | 300V AC/160V DC | 20,000 A @ 160 V DC 200,000 A @ 300 V AC | 7/8" | 9/16" | 1 | Ferrule | UL Listed, CSA Certified, CE Marked | 000000000 | 00000 | 00000 |
50 | 300V AC/160V DC | 20,000 A @ 160 V DC 200,000 A @ 300 V AC | 7/8" | 9/16" | 1 | Ferrule | UL Listed, CSA Certified, CE Marked | 000000000 | 00000 | 00000 |
60 | 300V AC/160V DC | 20,000 A @ 160 V DC 200,000 A @ 300 V AC | 7/8" | 9/16" | 1 | Ferrule | UL Listed, CSA Certified, CE Marked | 000000000 | 00000 | 00000 |
80 | 300V AC/160V DC | 20,000 A @ 160 V DC 200,000 A @ 300 V AC | 2 3/16" | 3/4" | 1 | Knife Blade | UL Listed, CSA Certified, CE Marked | 00000000 | 00000 | 00000 |
100 | 300V AC/160V DC | 20,000 A @ 160 V DC 200,000 A @ 300 V AC | 2 3/16" | 3/4" | 1 | Knife Blade | UL Listed, CSA Certified, CE Marked | 00000000 | 00000 | 00000 |
150 | 300V AC/160V DC | 20,000 A @ 160 V DC 200,000 A @ 300 V AC | 2 7/16" | 7/8" | 1 | Knife Blade | UL Listed, CSA Certified, CE Marked | 00000000 | 00000 | 00000 |
200 | 300V AC/160V DC | 20,000 A @ 160 V DC 200,000 A @ 300 V AC | 2 7/16" | 7/8" | 1 | Knife Blade | UL Listed, CSA Certified, CE Marked | 00000000 | 00000 | 00000 |
300 | 300V AC/160V DC | 20,000 A @ 160 V DC 200,000 A @ 300 V AC | 2 3/4" | 1" | 1 | Knife Blade | UL Listed, CSA Certified, CE Marked | 00000000 | 000000 | 000000 |
400 | 300V AC/160V DC | 20,000 A @ 160 V DC 200,000 A @ 300 V AC | 2 3/4" | 1" | 1 | Knife Blade | UL Listed, CSA Certified, CE Marked | 00000000 | 00000 | 00000 |
Manufacturer Equivalent: A6T, JJS, JLLS | ||||||||||
3 | 600V AC | 200,000 A @ 600 V AC | 1 1/2" | 9/16" | 1 | Ferrule | UL Listed, CSA Certified, CE Marked | 000000000 | 00000 | 00000 |
10 | 600V AC | 200,000 A @ 600 V AC | 1 1/2" | 9/16" | 1 | Ferrule | UL Listed, CSA Certified, CE Marked | 000000000 | 00000 | 00000 |
15 | 600V AC | 200,000 A @ 600 V AC | 1 1/2" | 9/16" | 1 | Ferrule | UL Listed, CSA Certified, CE Marked | 000000000 | 00000 | 00000 |
20 | 600V AC | 200,000 A @ 600 V AC | 1 1/2" | 9/16" | 1 | Ferrule | UL Listed, CSA Certified, CE Marked | 000000000 | 00000 | 00000 |
25 | 600V AC | 200,000 A @ 600 V AC | 1 1/2" | 9/16" | 1 | Ferrule | UL Listed, CSA Certified, CE Marked | 000000000 | 00000 | 00000 |
30 | 600V AC | 200,000 A @ 600 V AC | 1 1/2" | 9/16" | 1 | Ferrule | UL Listed, CSA Certified, CE Marked | 000000000 | 00000 | 00000 |
35 | 600V AC | 200,000 A @ 600 V AC | 1 9/16" | 13/16" | 1 | Ferrule | UL Listed, CSA Certified, CE Marked | 000000000 | 00000 | 00000 |
40 | 600V AC | 200,000 A @ 600 V AC | 1 9/16" | 13/16" | 1 | Ferrule | UL Listed, CSA Certified, CE Marked | 000000000 | 00000 | 00000 |
45 | 600V AC | 200,000 A @ 600 V AC | 1 9/16" | 13/16" | 1 | Ferrule | UL Listed, CSA Certified, CE Marked | 000000000 | 00000 | 00000 |
50 | 600V AC | 200,000 A @ 600 V AC | 1 9/16" | 13/16" | 1 | Ferrule | UL Listed, CSA Certified, CE Marked | 000000000 | 00000 | 00000 |
60 | 600V AC | 200,000 A @ 600 V AC | 1 9/16" | 13/16" | 1 | Ferrule | UL Listed, CSA Certified, CE Marked | 000000000 | 00000 | 00000 |
70 | 600V AC | 200,000 A @ 600 V AC | 2 15/16" | 3/4" | 1 | Knife Blade | UL Listed, CSA Certified, CE Marked | 000000000 | 00000 | 00000 |
80 | 600V AC | 200,000 A @ 600 V AC | 2 15/16" | 3/4" | 1 | Knife Blade | UL Listed, CSA Certified, CE Marked | 000000000 | 00000 | 00000 |
90 | 600V AC | 200,000 A @ 600 V AC | 2 15/16" | 3/4" | 1 | Knife Blade | UL Listed, CSA Certified, CE Marked | 000000000 | 00000 | 00000 |
100 | 600V AC | 200,000 A @ 600 V AC | 2 15/16" | 3/4" | 1 | Knife Blade | UL Listed, CSA Certified, CE Marked | 00000000 | 00000 | 00000 |
125 | 600V AC | 200,000 A @ 600 V AC | 3 1/4" | 7/8" | 1 | Knife Blade | UL Listed, CSA Certified, CE Marked | 00000000 | 00000 | 00000 |
200 | 600V AC | 200,000 A @ 600 V AC | 3 1/4" | 7/8" | 1 | Knife Blade | UL Listed, CSA Certified, CE Marked | 00000000 | 00000 | 00000 |
400 | 600V AC | 200,000 A @ 600 V AC | 3 5/8" | 1" | 1 | Knife Blade | UL Listed, CSA Certified, CE Marked | 00000000 | 000000 | 000000 |