Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 100 A, 600 V AC, 300 V DC - Time-Delay Blade Fuses
LITTELFUSETime-Delay Blade Fuses

LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 100 A, 600 V AC, 300 V DC

The LITTELFUSE FLSR100 is a Class RK5, time-delay blade fuse rated at 100 A, 600 V AC and 300 V DC. Part of the FLSR Series, this non-indicating fuse is designed for overcurrent protection in industrial electrical…

SKU 3G-OTH-26357

Also listed as: FLSR 100 · FLSR-100

Brand
LITTELFUSE
Item
Fuse: Class RK5, FLSR Series, Time-Delay, 100 A, 600 V AC, 300 V DC
Category
Time-Delay Blade 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 — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

LITTELFUSE
Manufacturer Part Number
FLSR100
Series
FLSR
Type
FLSR Series, Time-Delay, 100 A, Non-Indicating
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 FLSR100 is a Class RK5, time-delay blade fuse rated at 100 A, 600 V AC and 300 V DC. Part of the FLSR Series, this non-indicating fuse is designed for overcurrent protection in industrial electrical systems.

Frequently Asked Questions

What is the Littelfuse FLSR100 fuse used for?

The Littelfuse FLSR100 is a Class RK5 time-delay fuse rated 100 A, 600 V AC / 300 V DC. It protects motor circuits, transformers, and other inductive loads from overcurrent and short circuits, allowing harmless inrush currents to pass without nuisance opening.

What are the specifications of the Littelfuse FLSR100 fuse?

The Littelfuse FLSR100 is a Class RK5, FLSR Series, time-delay, non-indicating fuse. It is rated 100 A, 600 V AC, 300 V DC. The manufacturer part number is FLSR100. It is designed for branch-circuit protection of motor and transformer applications.

Where to buy Littelfuse FLSR100 fuse worldwide?

3G Electric supplies the Littelfuse FLSR100 fuse to customers worldwide. As a global industrial sourcing partner, we handle full logistics, customs clearance, and delivery to your site. Contact us for a quote and lead time on this Class RK5 time-delay fuse.

How to select the correct Littelfuse FLSR series fuse for a motor circuit?

To select the correct Littelfuse FLSR series fuse, match the continuous current rating (e.g., 100 A) to the motor full-load amps, and verify the voltage rating (600 V AC / 300 V DC) exceeds the system voltage. The time-delay characteristic handles motor startup inrush without nuisance tripping.

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 blade 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 RK5, FLSR Series, Time-Delay, 70 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR070)
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 70 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR070)
LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 75 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR075)
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 75 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR075)
LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 80 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR080)
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 80 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR080)
LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 110 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR110)
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 110 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR110)
LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 400 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR400)
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 400 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR400)
LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 90 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR090)
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 90 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR090)

More from LITTELFUSE

View all LITTELFUSE parts
LITTELFUSE Fuse: Class RK5, FLNR-ID Series, Time-Delay, 110 A, 250 V AC, 125 V DC, Indicating (MPN FLNR110ID)
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLNR-ID Series, Time-Delay, 110 A, 250 V AC, 125 V DC, Indicating (MPN FLNR110ID)
LITTELFUSE Fuse: Class RK5, FLNR-ID Series, Time-Delay, 80 A, 250 V AC, 125 V DC, Indicating (MPN FLNR080ID)
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLNR-ID Series, Time-Delay, 80 A, 250 V AC, 125 V DC, Indicating (MPN FLNR080ID)
LITTELFUSE Fuse: Class RK5, IDSR Series, Time-Delay, 90 A, 600 V AC, 600 V DC, Indicating (MPN IDSR090)
LITTELFUSE
LITTELFUSE Fuse: Class RK5, IDSR Series, Time-Delay, 90 A, 600 V AC, 600 V DC, Indicating (MPN IDSR090)
LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 350 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR350)
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 350 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR350)
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 75 A, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR075)
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 75 A, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR075)
LITTELFUSE Fuse: Class RK5, FLSR-ID Series, Time-Delay, 300 A, 600 V AC, 300 V DC, Indicating (MPN FLSR300ID)
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLSR-ID Series, Time-Delay, 300 A, 600 V AC, 300 V DC, Indicating (MPN FLSR300ID)
LITTELFUSE Fuse: Class RK5, IDSR Series, Time-Delay, 225 A, 600 V AC, 600 V DC, Indicating (MPN IDSR225)
LITTELFUSE
LITTELFUSE Fuse: Class RK5, IDSR Series, Time-Delay, 225 A, 600 V AC, 600 V DC, Indicating (MPN IDSR225)
LITTELFUSE Fuse: Class RK5, FLSR-ID Series, Time-Delay, 200 A, 600 V AC, 300 V DC, Indicating (MPN FLSR200ID)
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLSR-ID Series, Time-Delay, 200 A, 600 V AC, 300 V DC, Indicating (MPN FLSR200ID)