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LITTELFUSE Fuse: Class L, KLLU Series, Bolt-On Body, Time-Delay, 4 kA, 600 V AC - Time-Delay Bolt-On Fuses
LITTELFUSETime-Delay Bolt-On Fuses

LITTELFUSE Fuse: Class L, KLLU Series, Bolt-On Body, Time-Delay, 4 kA, 600 V AC

The LITTELFUSE KLLU Series Class L Time-Delay Bolt-On Fuse (MPN KLLU4000X) is a 4 kA, 600 V AC, 300 V DC industrial fuse with a bolt-on body. This time-delay fuse is designed for overcurrent protection in…

SKU 3G-OTH-27769

Brand
LITTELFUSE
Item
Fuse: Class L, KLLU Series, Bolt-On Body, Time-Delay, 4 kA, 600 V AC
Category
Time-Delay Bolt-On Fuses
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Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

LITTELFUSE
Manufacturer Part Number
KLLU4000X
Series
KLLU
Type
KLLU Series, Bolt-On Body, Time-Delay, 4 kA
AC
600 V
DC
300 V

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LITTELFUSE Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The LITTELFUSE KLLU Series Class L Time-Delay Bolt-On Fuse (MPN KLLU4000X) is a 4 kA, 600 V AC, 300 V DC industrial fuse with a bolt-on body. This time-delay fuse is designed for overcurrent protection in high-current applications.

Frequently Asked Questions

What is the LITTELFUSE KLLU4000X fuse used for?

The LITTELFUSE KLLU4000X is a Class L time-delay bolt-on fuse rated 4 kA, 600 V AC, 300 V DC. It provides overcurrent protection in high-current industrial applications such as switchboards, panelboards, and motor control centers where high interrupting capacity is required.

What are the specifications of the LITTELFUSE KLLU4000X?

The LITTELFUSE KLLU4000X is a KLLU Series Class L fuse with a bolt-on body, time-delay characteristic, 4 kA rating, 600 V AC, and 300 V DC. The manufacturer part number is KLLU4000X. It is designed for high-current overcurrent protection in industrial circuits.

Where to buy the LITTELFUSE KLLU4000X worldwide?

3G Electric supplies the LITTELFUSE KLLU4000X fuse to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your location. Contact us for pricing and lead time on this Class L time-delay bolt-on fuse.

How to select the correct LITTELFUSE KLLU4000X fuse for an application?

To select the LITTELFUSE KLLU4000X, verify your circuit voltage does not exceed 600 V AC or 300 V DC and that the continuous current is within the 4 kA rating. Ensure the bolt-on mounting matches your fuse holder. Consult a qualified engineer for coordination with upstream protection devices.

Used in

Common applications for LITTELFUSE
Power electronics protection — Littelfuse PSR Series semiconductor fuses for IGBT and diode protection in variable frequency drives.
Solar photovoltaic systems — Littelfuse SPF Series fast-acting fuses for string overcurrent protection in PV arrays.
Automotive electrical systems — Littelfuse MIDI® 498 Series bolt-on fuses for battery and alternator protection in vehicles.
Industrial control panels — Littelfuse KLKD Series midget fuses for branch circuit protection in control transformers and relays.
Motor control centers — Littelfuse BLF Series fast-acting fuses for short-circuit protection of motor starters and contactors.

LITTELFUSE Products

3G Electric supplies LITTELFUSE time-delay bolt-on fuses. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Compatible alternatives & equivalents

Cross-referenced by specification & description
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