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LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 400 A, 600 V AC, 300 V DC - Time-Delay Blade Fuses
LITTELFUSETime-Delay Blade Fuses

LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 400 A, 600 V AC, 300 V DC

The LITTELFUSE FLSR400 is a Class RK5, time-delay blade fuse rated at 400 A, 600 V AC and 300 V DC. Part of the FLSR Series, this non-indicating fuse is designed for overcurrent protection in industrial power…

SKU 3G-OTH-27172

Also listed as: FLSR 400 · FLSR-400

Brand
LITTELFUSE
Item
Fuse: Class RK5, FLSR Series, Time-Delay, 400 A, 600 V AC, 300 V DC
Category
Time-Delay Blade Fuses
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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
FLSR400
Series
FLSR
Type
FLSR Series, Time-Delay, 400 A, Non-Indicating
AC
600 V
DC
300 V

Technical Documents

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

Product Description

The LITTELFUSE FLSR400 is a Class RK5, time-delay blade fuse rated at 400 A, 600 V AC and 300 V DC. Part of the FLSR Series, this non-indicating fuse is designed for overcurrent protection in industrial power distribution systems. 3G Electric interprets your demand and sources this genuine LITTELFUSE component across 14 industrial departments, with specialist expertise in electrical controls to support your application.

Frequently Asked Questions

What is the LITTELFUSE FLSR400 fuse used for?

The LITTELFUSE FLSR400 is a Class RK5 time-delay fuse rated 400 A at 600 V AC or 300 V DC. It protects motors, transformers, and other inductive loads from short circuits and overloads in industrial power distribution, motor control centers, and panelboards.

What are the specifications of the LITTELFUSE FLSR400?

The LITTELFUSE FLSR400 is a Class RK5, time-delay, non-indicating fuse from the FLSR series. It is rated 400 A, 600 V AC, 300 V DC. The manufacturer part number is FLSR400. It is designed for high-current industrial protection applications.

Where to buy LITTELFUSE FLSR400 worldwide?

You can source the LITTELFUSE FLSR400 fuse through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time on this item.

How to select the correct LITTELFUSE FLSR400 fuse for an application?

Select the LITTELFUSE FLSR400 fuse by matching its 400 A rating and 600 V AC / 300 V DC voltage to your circuit requirements. Ensure the Class RK5 time-delay characteristic suits motor or transformer starting currents. Always consult the manufacturer's data sheet for coordination and interrupting rating.

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.

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Compatible alternatives & equivalents

Cross-referenced by specification & description
LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 600 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR600)
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LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 600 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR600)
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LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 200 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR200)
LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 75 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR075)
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LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 75 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR075)

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LITTELFUSE Fuse: Class RK5, FLSR-ID Series, Time-Delay, 300 A, 600 V AC, 300 V DC, Indicating (MPN FLSR300ID)
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