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

LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 4.5 A, 250 V AC, 125 V DC - Time-Delay Cylindrical Fuses
LITTELFUSETime-Delay Cylindrical Fuses

LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 4.5 A, 250 V AC, 125 V DC

The LITTELFUSE FLNR Series FLNR04.5T is a Class RK5, time-delay cylindrical fuse rated at 4.5 A, 250 V AC and 125 V DC. This non-indicating fuse is designed for overcurrent protection in industrial electrical…

SKU 3G-OTH-28537

Also listed as: FLNR045T · FLNR04 5T · FLNR04-5T

Brand
LITTELFUSE
Item
Fuse: Class RK5, FLNR Series, Time-Delay, 4.5 A, 250 V AC, 125 V DC
Category
Time-Delay Cylindrical 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
FLNR04.5T
Series
FLNR
Type
FLNR Series, Time-Delay, 4.5 A, Non-Indicating
AC
250 V
DC
125 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 FLNR Series FLNR04.5T is a Class RK5, time-delay cylindrical fuse rated at 4.5 A, 250 V AC and 125 V DC. This non-indicating fuse is designed for overcurrent protection in industrial electrical systems. 3G Electric interprets your demand and sources this genuine component across 14 industrial departments, with specialist depth in controls to support your application.

Frequently Asked Questions

What is the LITTELFUSE FLNR04.5T fuse used for?

The LITTELFUSE FLNR04.5T is a Class RK5 time-delay fuse rated 4.5 A, 250 V AC / 125 V DC. It protects motors, transformers, and lighting circuits from overloads and short circuits. Its time-delay characteristic allows harmless temporary inrush currents without nuisance opening.

What are the specifications of the LITTELFUSE FLNR04.5T?

The LITTELFUSE FLNR04.5T is a Class RK5, FLNR Series, time-delay, non-indicating fuse. It is rated 4.5 A, 250 V AC and 125 V DC. The manufacturer part number is FLNR04.5T. It is designed for cylindrical fuse holders and provides branch-circuit protection.

Where to buy the LITTELFUSE FLNR04.5T worldwide?

3G Electric supplies the LITTELFUSE FLNR04.5T fuse worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time. We source and deliver this FLNR Series fuse to any country.

How to select the correct LITTELFUSE FLNR series fuse?

To select the correct LITTELFUSE FLNR series fuse, match the voltage rating (250 V AC or 125 V DC) and current rating (e.g., 4.5 A) to your circuit requirements. Ensure the fuse is Class RK5 for branch-circuit protection. Verify the time-delay characteristic suits motor or transformer starting currents.

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 cylindrical 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, FLNR Series, Time-Delay, 1.4 A, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR01.4T)
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 1.4 A, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR01.4T)
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 5.6 A, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR05.6T)
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 5.6 A, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR05.6T)
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 400 mA, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR.400T)
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 400 mA, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR.400T)
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 125 mA, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR.125T)
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 125 mA, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR.125T)
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 300 mA, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR.300T)
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 300 mA, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR.300T)
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 250 mA, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR.250T)
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 250 mA, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR.250T)

More from LITTELFUSE

View all LITTELFUSE parts
LITTELFUSE FUSE 250V TIME DELAY MIDGET.100A: FLM Series, Midget, Time-Delay, 100 mA, 250 V AC (MPN FLM.100)
LITTELFUSE
LITTELFUSE FUSE 250V TIME DELAY MIDGET.100A: FLM Series, Midget, Time-Delay, 100 mA, 250 V AC (MPN FLM.100)
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 40 A, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR040)
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 40 A, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR040)
LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 10 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR010)
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 10 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR010)
LITTELFUSE Fuse: Class RK5, FLSR-ID Series, Time-Delay, 8 A, 600 V AC, 300 V DC, Indicating (MPN FLSR008ID)
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLSR-ID Series, Time-Delay, 8 A, 600 V AC, 300 V DC, Indicating (MPN FLSR008ID)
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 12 A, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR012)
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 12 A, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR012)
LITTELFUSE Fuse: Class RK5, FLSR-ID Series, Time-Delay, 45 A, 600 V AC, 300 V DC, Indicating (MPN FLSR045ID)
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLSR-ID Series, Time-Delay, 45 A, 600 V AC, 300 V DC, Indicating (MPN FLSR045ID)
LITTELFUSE Fuse: Class RK5, FLSR-ID Series, Time-Delay, 60 A, 600 V AC, 300 V DC, Indicating (MPN FLSR060ID)
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLSR-ID Series, Time-Delay, 60 A, 600 V AC, 300 V DC, Indicating (MPN FLSR060ID)
LITTELFUSE Fuse: FLQ Series, Midget, Time-Delay, 10 A, 500 V AC, 300 V DC, 13/32 in x 1 1/2 in (MPN FLQ010)
LITTELFUSE
LITTELFUSE Fuse: FLQ Series, Midget, Time-Delay, 10 A, 500 V AC, 300 V DC, 13/32 in x 1 1/2 in (MPN FLQ010)