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Sign In Register Forgot User ID? Forgot Password?UL Class RK1 Fuses
354 products
UL Class RK1 fuses are more current-limiting than RK5 fuses to react more quickly to overcurrent. These fuses are the same size as Class H and K fuses, but have a rejection feature that prevents an accidental downgrade from a current-limiting system. Their modified terminals ensure a match with the rejection clips in Class R fuse holders that prevent the installation of fuses with a lower interrupting capacity. They're typically used in newer equipment, but can also be used with a Class H fuse holder to upgrade older installations from Class H or K fuses for improved overcurrent protection. These fuses are current-limiting to prevent electrical damage by disconnecting circuits before they're exposed to the full magnitude and duration of an overcurrent.
Time-Delay UL Class RK1 Fuses, Nonindicating
Time-delay, nonindicating UL Class RK1 fuses tolerate temporary inrush currents without opening, which prevents nuisance-blowing from motor and equipment startups. Also called slow-blow Class RK1 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: A2D-R, LENRK, LLNRK, LPN-RK
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Equivalent Series: A2D-R, LLNRK, LPN-RK-SP
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Equivalent Series: A2D-R, LLNRK-ID, LPN-RK-SPI
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Equivalent Series: A6D-R, LESRK, LLSRK, LPS-RK
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Equivalent Series: A6D-R, LLSRK, LPS-RK-SP
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Equivalent Series: A6D-R, LLSRK-ID, LPS-RK-SPI
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Time-Delay UL Class RK1 Fuses, Indicating
Time-delay, indicating UL Class RK1 fuses tolerate temporary inrush currents without opening, which prevents nuisance-blowing from motor and equipment startups. Also called slow-blow Class RK1 fuses, they open to disconnect an electrical circuit when exposed to sustained loads and short circuits. They have a visual indicator to make it easier to identify blown fuses for replacement.
Equivalent Series: A2D-R, LLNRK-ID, LPN-RK-SPI
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Equivalent Series: A6D-R, LLSRK-ID, LPS-RK-SPI
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Fast-Acting UL Class RK1 Fuses, Nonindicating
Fast-acting, nonindicating UL Class RK1 fuses open within seconds of being exposed to overloads and short circuits. Also called fast-blow Class RK1 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.
Equivalent Series: A2K-R, KLRN, KTN-R
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Equivalent Series: A2K-R, KLRN, KWN-R
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Equivalent Series: A6K-R, KLSR, KTS-R
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