We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

3G Electric
RFQ CartGet a QuoteSign inSign up
LITTELFUSE Fuse: Class L, KLLU Series, Bolt-On Body, Time-Delay, 1.2 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, 1.2 kA, 600 V AC

The LITTELFUSE KLLU Series Class L Time-Delay Bolt-On Fuse (MPN KLLU1200X) is a 1.2 kA, 600 V AC, 300 V DC industrial fuse with a bolt-on body. It provides time-delay operation for overcurrent protection in…

SKU 3G-OTH-27405

Brand
LITTELFUSE
Item
Fuse: Class L, KLLU Series, Bolt-On Body, Time-Delay, 1.2 kA, 600 V AC
Category
Time-Delay Bolt-On Fuses
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

LITTELFUSE
Manufacturer Part Number
KLLU1200X
Series
KLLU
Type
KLLU Series, Bolt-On Body, Time-Delay, 1.2 kA
AC
600 V
DC
300 V

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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

Product Description

The LITTELFUSE KLLU Series Class L Time-Delay Bolt-On Fuse (MPN KLLU1200X) is a 1.2 kA, 600 V AC, 300 V DC industrial fuse with a bolt-on body. It provides time-delay operation for overcurrent protection in high-current applications.

Frequently Asked Questions

What is the LITTELFUSE KLLU1200X fuse used for?

The LITTELFUSE KLLU1200X is a Class L time-delay bolt-on fuse rated 1.2 kA at 600 V AC or 300 V DC. It protects industrial equipment such as switchgear, panelboards, and motor control centers from overcurrents and short circuits in high-current power distribution systems.

What are the specifications of the LITTELFUSE KLLU1200X?

The LITTELFUSE KLLU1200X is a KLLU Series Class L bolt-on fuse with time-delay operation. It is rated 1.2 kA, 600 V AC, and 300 V DC. The bolt-on body ensures secure mounting in high-current industrial applications requiring reliable overcurrent protection.

Where to buy the LITTELFUSE KLLU1200X worldwide?

3G Electric supplies the LITTELFUSE KLLU1200X fuse to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for a quote and lead time on this Class L time-delay bolt-on fuse.

How to select the correct LITTELFUSE KLLU series fuse for an application?

To select the correct LITTELFUSE KLLU series fuse, match the voltage rating (600 V AC or 300 V DC) and current rating (1.2 kA for the KLLU1200X) to your circuit requirements. Consider time-delay characteristics for motor-starting or transformer inrush. Consult a qualified engineer for coordination studies.

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.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

Compatible alternatives & equivalents

Cross-referenced by specification & description
LITTELFUSE Fuse: Class L, KLLU Series, Bolt-On Body, Time-Delay, 1.35 kA, 600 V AC, 300 V DC (MPN KLLU1350X)
LITTELFUSE
LITTELFUSE Fuse: Class L, KLLU Series, Bolt-On Body, Time-Delay, 1.35 kA, 600 V AC, 300 V DC (MPN KLLU1350X)
LITTELFUSE Fuse: Class L, KLLU Series, Bolt-On Body, Time-Delay, 1.4 kA, 600 V AC, 300 V DC (MPN KLLU1400X)
LITTELFUSE
LITTELFUSE Fuse: Class L, KLLU Series, Bolt-On Body, Time-Delay, 1.4 kA, 600 V AC, 300 V DC (MPN KLLU1400X)
LITTELFUSE Fuse: Class L, KLLU Series, Bolt-On Body, Time-Delay, 900 A, 600 V AC, 300 V DC (MPN KLLU900.X)
LITTELFUSE
LITTELFUSE Fuse: Class L, KLLU Series, Bolt-On Body, Time-Delay, 900 A, 600 V AC, 300 V DC (MPN KLLU900.X)
LITTELFUSE Fuse: Class L, KLLU Series, Bolt-On Body, Time-Delay, 1.5 kA, 600 V AC, 300 V DC (MPN KLLU1500X)
LITTELFUSE
LITTELFUSE Fuse: Class L, KLLU Series, Bolt-On Body, Time-Delay, 1.5 kA, 600 V AC, 300 V DC (MPN KLLU1500X)
LITTELFUSE Fuse: Class L, KLLU Series, Bolt-On Body, Time-Delay, 2 kA, 600 V AC, 300 V DC (MPN KLLU2000X)
LITTELFUSE
LITTELFUSE Fuse: Class L, KLLU Series, Bolt-On Body, Time-Delay, 2 kA, 600 V AC, 300 V DC (MPN KLLU2000X)
LITTELFUSE Fuse: Class L, KLLU Series, Bolt-On Body, Time-Delay, 1.8 kA, 600 V AC, 300 V DC (MPN KLLU1800X)
LITTELFUSE
LITTELFUSE Fuse: Class L, KLLU Series, Bolt-On Body, Time-Delay, 1.8 kA, 600 V AC, 300 V DC (MPN KLLU1800X)

More from LITTELFUSE

View all LITTELFUSE parts →
LITTELFUSE Fuse: Class L, KLPC Series, Bolt-On Body, Time-Delay, 800 A, 600 V AC, 480 V DC (MPN KLPC800.X)
LITTELFUSE
LITTELFUSE Fuse: Class L, KLPC Series, Bolt-On Body, Time-Delay, 800 A, 600 V AC, 480 V DC (MPN KLPC800.X)
LITTELFUSE Fuse: Class L, KLLU Series, Bolt-On Body, Time-Delay, 700 A, 600 V AC, 300 V DC (MPN KLLU700.X)
LITTELFUSE
LITTELFUSE Fuse: Class L, KLLU Series, Bolt-On Body, Time-Delay, 700 A, 600 V AC, 300 V DC (MPN KLLU700.X)
LITTELFUSE Fuse: Class L, KLLU Series, Bolt-On Body, Time-Delay, 4 kA, 600 V AC, 300 V DC (MPN KLLU4000X)
LITTELFUSE
LITTELFUSE Fuse: Class L, KLLU Series, Bolt-On Body, Time-Delay, 4 kA, 600 V AC, 300 V DC (MPN KLLU4000X)
LITTELFUSE Fuse: Class L, KLPC Series, Bolt-On Body, Time-Delay, 350 A, 600 V AC, 480 V DC (MPN KLPC350.X)
LITTELFUSE
LITTELFUSE Fuse: Class L, KLPC Series, Bolt-On Body, Time-Delay, 350 A, 600 V AC, 480 V DC (MPN KLPC350.X)
LITTELFUSE Fuse: Class L, KLPC Series, Bolt-On Body, Time-Delay, 450 A, 600 V AC, 480 V DC (MPN KLPC450.X)
LITTELFUSE
LITTELFUSE Fuse: Class L, KLPC Series, Bolt-On Body, Time-Delay, 450 A, 600 V AC, 480 V DC (MPN KLPC450.X)
LITTELFUSE Fuse: Class L, KLLU Series, Bolt-On Body, Time-Delay, 1 kA, 600 V AC, 300 V DC (MPN KLLU1000X)
LITTELFUSE
LITTELFUSE Fuse: Class L, KLLU Series, Bolt-On Body, Time-Delay, 1 kA, 600 V AC, 300 V DC (MPN KLLU1000X)
LITTELFUSE Fuse: Class L, KLPC Series, Bolt-On Body, Time-Delay, 2 kA, 600 V AC, 480 V DC (MPN KLPC2000X)
LITTELFUSE
LITTELFUSE Fuse: Class L, KLPC Series, Bolt-On Body, Time-Delay, 2 kA, 600 V AC, 480 V DC (MPN KLPC2000X)
LITTELFUSE Fuse: Class L, KLPC Series, Bolt-On Body, Time-Delay, 1.9 kA, 600 V AC, 480 V DC (MPN KLPC1900X)
LITTELFUSE
LITTELFUSE Fuse: Class L, KLPC Series, Bolt-On Body, Time-Delay, 1.9 kA, 600 V AC, 480 V DC (MPN KLPC1900X)