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LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 450 A, 250 V AC, 125 V DC - Time-Delay Blade Fuses
LITTELFUSETime-Delay Blade Fuses

LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 450 A, 250 V AC, 125 V DC

The LITTELFUSE FLNR450 is a Class RK5, time-delay blade fuse rated at 450 A, 250 V AC and 125 V DC. Part of the FLNR Series, this non-indicating fuse is designed for overcurrent protection in industrial electrical…

SKU 3G-OTH-27438

Also listed as: FLNR 450 · FLNR-450

Brand
LITTELFUSE
Item
Fuse: Class RK5, FLNR Series, Time-Delay, 450 A, 250 V AC, 125 V DC
Category
Time-Delay Blade Fuses
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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
FLNR450
Series
FLNR
Type
FLNR Series, Time-Delay, 450 A, Non-Indicating
AC
250 V
DC
125 V

Technical Documents

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

Product Description

The LITTELFUSE FLNR450 is a Class RK5, time-delay blade fuse rated at 450 A, 250 V AC and 125 V DC. Part of the FLNR Series, this non-indicating fuse is designed for overcurrent protection in industrial electrical systems.

Frequently Asked Questions

What is the LITTELFUSE FLNR450 fuse used for?

The LITTELFUSE FLNR450 is a Class RK5, time-delay fuse rated 450 A at 250 V AC or 125 V DC. It protects industrial circuits, motors, and transformers from overloads and short circuits, especially where high inrush currents occur. Its non-indicating design suits applications where visual blown-fuse indication is not required.

What are the specifications of the LITTELFUSE FLNR450 fuse?

The LITTELFUSE FLNR450 is a Class RK5, time-delay blade fuse rated 450 A, 250 V AC, and 125 V DC. It is part of the FLNR Series, non-indicating, with manufacturer part number FLNR450. This fuse provides overload and short-circuit protection for industrial equipment requiring a high interrupting rating.

Where to buy the LITTELFUSE FLNR450 fuse worldwide?

You can source the LITTELFUSE FLNR450 fuse worldwide through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time; we supply genuine LITTELFUSE components for industrial applications.

How to select the correct LITTELFUSE FLNR450 fuse for an application?

To select the LITTELFUSE FLNR450, verify your circuit's voltage (250 V AC or 125 V DC max) and continuous current (450 A). Ensure the Class RK5 time-delay characteristic matches your motor or transformer inrush. Confirm the fuse holder or disconnect switch accepts FLNR Series blade dimensions. 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 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
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