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Sign In Register Forgot User ID? Forgot Password?UL Class L Fuses
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UL Class L fuses protect electrical feeders and service equipment from overcurrent. These 600VAC fuses are not interchangeable with any other UL fuse class. They are current-limiting to prevent electrical damage by disconnecting circuits before they're exposed to the full magnitude and duration of an overcurrent. Class L fuses bolt onto their mountings for a secure hold that resists loosening from vibration and helps ensure proper seating to maintain contact with the circuit.
Time-Delay UL Class L Fuses, Nonindicating
Time-delay, nonindicating UL Class L fuses tolerate temporary inrush currents without opening, which prevents nuisance-blowing from motor and equipment startups. Also called slow-blow Class L fuses, they open to disconnect an electrical circuit when exposed to sustained loads and short circuits. They have no indicator for identifying a blown fuse, so they're sometimes used with an indicating fuse block or cover.
Equivalent Series: A4BQ, A4BY, KLPC, KRP-C
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Equivalent Series: A4BQ, KLPC, KRP-C
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Equivalent Series: A4BY
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Equivalent Series: A4BY, KLLU, KLPC, KLU
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Equivalent Series: A4BY, KLLU, KLPC, KLU, KTU
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Equivalent Series: KLLU
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Equivalent Series: KLPC
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Equivalent Series: KLU
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Equivalent Series: KTU
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Fast-Acting UL Class L Fuses, Nonindicating
Fast-acting, nonindicating UL Class L fuses open within seconds of being exposed to overloads and short circuits. Also called fast-blow Class L fuses, they are highly sensitive to changes in current flow and don't tolerate temporary overload currents or power surges. They have no indicator for identifying a blown fuse, so they're sometimes used with an indicating fuse block or cover.
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