JLLS250 - 250Amp Fuse Description
JLLS250 - 250Amp Fuse
The JLLS250 is a 250-amp Class T fast-acting fuse designed for your demanding electrical applications where high interrupting capacity, current limitation, and a compact fuse configuration matter. Rated up to 600VAC and 300VDC, the JLLS250 delivers a 200 kA AC interrupting rating and a 20 kA interrupting rating at 300VDC. For maintenance professionals replacing an existing JLLS250—or engineers working with equipment that specifically calls for a 250A, 600V Class T fuse—this model provides clearly defined electrical characteristics in a space-efficient package.
Key Features and Benefits
- 250A continuous current rating for equipment and circuits engineered for 250-amp Class T protection.
- Rated for systems up to 600VAC and 300VDC.
- Fast-acting (F) opening characteristic operates without an intentional time delay.
- The current-limiting design helps restrict the amount of fault current passing through the circuit during applicable overcurrent events.
- Class T fuse configuration combines high interrupting capacity with a compact physical format.
- Knife-blade/bolt-in construction provides the required mechanical configuration for compatible mounting hardware.
- Non-indicating fuse for applications that do not require a visual blown-fuse indicator.
- Installs using the appropriate fuse block, clip, or holder.
Technical Specifications
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Catalog Number: JLLS250
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Series: JLLS
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Product Type: Class T Fuse
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Continuous Current Rating: 250A
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Maximum AC Voltage: 600VAC
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Maximum DC Voltage: 300VDC
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AC Interrupting Rating: 200 kA
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DC Interrupting Rating: 20 kA at 300VDC
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Opening Characteristic: Fast-Acting (F)
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Fuse Class: Class T
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Family Style: Current Limiting
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Construction / Size: Knife-Blade / Bolt-In
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Indicating: No
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Mounting Method: Fuse Block / Clip / Holder
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Specified Holder Series: LFT60400 Series
Material Compliance and Certifications
The JLLS250 is part of the JLLS family of Class T, fast-acting, current-limiting fuses. The supplied product specifications clearly establish its fuse class, electrical ratings, opening characteristic, mounting configuration, and interrupting capacities.
Where It Works Best
The JLLS250 250A Class T fuse is best suited to commercial and industrial electrical equipment specifically designed around 250A Class T overcurrent protection. It can be a practical fit for compatible power distribution equipment, disconnects, panels, industrial electrical systems, and other applications that require a fast-acting, current-limiting fuse rated up to 600VAC.
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Littelfuse® is a registered trademark of Littelfuse, Inc. Products sold are surplus, used, or refurbished and are NOT supplied by Littelfuse, Inc. or its affiliates.
Specifications
- Width:1.593
- Depth:1.593
- Height:3.625
- Amperes:250
- A.I.C. Rating & Volts:200 kA @ 600 V.AC
- Type:JLLS
- Additional Notes:Knife-blade Style, Non-Indicating, Very Fast-Acting, current-limiting Class T Fuse
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You may return unused items within 30 days of delivery for a full refund.
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