JLLN020 - 20Amp Fuse Description
JLLN020 - 20Amp Fuse
The Littelfuse JLLN020 packs a very specific set of electrical characteristics into an industrial cartridge fuse: 20 amps, Class T, fast-acting operation, and a current-limiting design. For AC applications, it is rated up to 300VAC with a 200 kA interrupting rating at 300VAC. On the DC side, it is rated up to 160VDC with a 50 kA interrupting rating at 160VDC. For maintenance, repair, or replacement work, this gives you several concrete specifications to check before installation rather than relying on appearance alone.
Key Features and Benefits
- 20A continuous current rating — Gives you a clear amperage checkpoint when matching the fuse to equipment requirements.
- Class T configuration — Intended for equipment designed around the electrical and physical requirements of a Class T fuse.
- Fast-acting (F) opening characteristic — Clearly identifies the manufacturer's specified opening behavior.
- Current-limiting design — JLLN020 is identified as part of Littelfuse's current-limiting JLLN family.
- Dual AC/DC ratings — Rated for a maximum of 300VAC and 160VDC, making it important to match the rating to the actual circuit type.
- Non-indicating design — The manufacturer specifies the JLLN020 as a non-indicating fuse.
Technical Specifications
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Manufacturer: Littelfuse
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Catalog Number: JLLN020
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Series: JLLN
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Product Type: Fuse
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Continuous Current Rating: 20A
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Fuse Class: Class T
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Opening Characteristic: Fast-Acting (F)
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Family Style: Current Limiting
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Maximum AC Voltage: 300VAC
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AC Interrupting Rating: 200,000A (200 kA) at 300VAC
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Maximum DC Voltage: 160VDC
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DC Interrupting Rating: 50,000A (50 kA) at 160VDC
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Size / Construction: Industrial Cartridge
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Indicating: No
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Mounting Method: Fuse Block / Clip / Holder
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PG Holder: LFT30030 Series
Material Compliance and Certifications
The manufacturer information provided for the JLLN020 did not include specific UL, CSA, CE, RoHS, REACH, or other material-compliance or certification details. This does not mean the fuse lacks a particular certification. If your application requires an approval or compliance standard, verify the markings and authoritative documentation for the exact JLLN020 catalog number.
Where It Works Best
The Littelfuse JLLN020 20A Class T fuse is best considered for compatible equipment that specifically requires a 20-amp, fast-acting, current-limiting Class T industrial cartridge fuse. For AC circuits, equipment requirements should align with its 300VAC maximum voltage and 200 kA interrupting rating at 300VAC. For DC applications, check against the separate 160VDC maximum voltage and 50 kA interrupting rating at 160VDC. The equipment must also accommodate the specified industrial cartridge construction and appropriate fuse block, clip, or holder arrangement.
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Specifications
- Width:0.406
- Depth:0.406
- Height:0.875
- Amperes:20
- A.I.C. Rating & Volts:200 kA @ 300 V.AC
- Type:JLLN
- Additional Notes:Cartridge Style, Non-Indicating, Very Fast-Acting, current-limiting Class T Fuse
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