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

3G Electric
RFQ CartGet a QuoteSign inSign up
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 4 A, 250 V AC, 125 V DC - Time-Delay Cylindrical Fuses
LITTELFUSETime-Delay Cylindrical Fuses

LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 4 A, 250 V AC, 125 V DC

SKU 3G-OTH-26380

Brand
LITTELFUSE
Item
Fuse: Class RK5, FLNR Series, Time-Delay, 4 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 engineer
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

Technical Specifications

LITTELFUSE
Manufacturer Part Number
FLNR004
Series
FLNR
Type
FLNR Series, Time-Delay, 4 A, Non-Indicating
AC
250 V
DC
125 V
View Full Spec Sheet

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

Frequently Asked Questions

What is a Littelfuse FLNR004 fuse used for?

The Littelfuse FLNR004 is a Class RK5 time-delay fuse rated 4 A, 250 V AC / 125 V DC. It protects motors, transformers, and lighting circuits from overcurrent and short circuits. Its time-delay characteristic handles inrush currents without nuisance opening, making it ideal for industrial and commercial power distribution.

What are the specifications of the Littelfuse FLNR004 fuse?

The Littelfuse FLNR004 is a Class RK5, FLNR series, time-delay, non-indicating fuse. It is rated 4 A, 250 V AC and 125 V DC. The manufacturer part number is FLNR004. It is designed for branch-circuit protection in equipment with moderate inrush currents.

Where to buy Littelfuse FLNR004 fuses worldwide?

3G Electric supplies the Littelfuse FLNR004 fuse to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. As a global industrial sourcing partner, we provide genuine Littelfuse components with reliable lead times. Contact us for a quote and shipping options.

How to select the correct Littelfuse FLNR series fuse for an application?

To select the correct Littelfuse FLNR series fuse, match the voltage rating (250 V AC or 125 V DC) and current rating (4 A for FLNR004) to your circuit requirements. Consider the time-delay characteristic for motor or transformer starting currents. Always verify the interrupting rating and Class RK5 rejection features for proper fit in your fuse holder.

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 →

Similar products

Matched by specification & description
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 6 A, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR006). Key specifications — Series: FLNR.
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 6 A, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR006). Key specifications — Series: FLNR.
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 3 A, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR003). Key specifications — Series: FLNR.
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 3 A, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR003). Key specifications — Series: FLNR.
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 1 A, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR001). Key specifications — Series: FLNR.
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 1 A, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR001). Key specifications — Series: FLNR.
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 12 A, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR012). Key specifications — Series: FLNR.
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 12 A, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR012). Key specifications — Series: FLNR.
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 7 A, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR007). Key specifications — Series: FLNR.
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 7 A, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR007). Key specifications — Series: FLNR.
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 45 A, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR045). Key specifications — Series: FLNR.
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 45 A, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR045). Key specifications — Series: FLNR.

More from LITTELFUSE

View all LITTELFUSE parts →
LITTELFUSE Fuse: Class RK5, FLSR-ID Series, Time-Delay, 600 mA, 600 V AC, 300 V DC, Indicating (MPN FLSR.600ID). Key specifications — Series: FLSR-ID.
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLSR-ID Series, Time-Delay, 600 mA, 600 V AC, 300 V DC, Indicating (MPN FLSR.600ID). Key specifications — Series: FLSR-ID.
LITTELFUSE Fuse: Class RK5, IDSR Series, Time-Delay, 2 A, 600 V AC, 600 V DC, Indicating (MPN IDSR002). Key specifications — Series: IDSR.
LITTELFUSE
LITTELFUSE Fuse: Class RK5, IDSR Series, Time-Delay, 2 A, 600 V AC, 600 V DC, Indicating (MPN IDSR002). Key specifications — Series: IDSR.
LITTELFUSE Fuse: Class RK5, FLSR-ID Series, Time-Delay, 5 A, 600 V AC, 300 V DC, Indicating (MPN FLSR005ID). Key specifications — Series: FLSR-ID.
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLSR-ID Series, Time-Delay, 5 A, 600 V AC, 300 V DC, Indicating (MPN FLSR005ID). Key specifications — Series: FLSR-ID.
LITTELFUSE Fuse: Class RK5, FLSR-ID Series, Time-Delay, 17.5 A, 600 V AC, 300 V DC, Indicating (MPN FLSR17.5ID). Key specifications — Series: FLSR-ID.
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLSR-ID Series, Time-Delay, 17.5 A, 600 V AC, 300 V DC, Indicating (MPN FLSR17.5ID). Key specifications — Series: FLSR-ID.
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 3.5 A, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR03.5). Key specifications — Series: FLNR.
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 3.5 A, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR03.5). Key specifications — Series: FLNR.
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 6.25 A, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR6.25). Key specifications — Series: FLNR.
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 6.25 A, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR6.25). Key specifications — Series: FLNR.
LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 7 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR007). Key specifications — Series: FLSR.
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 7 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR007). Key specifications — Series: FLSR.
LITTELFUSE Fuse: Class RK5, FLSR-ID Series, Time-Delay, 3.5 A, 600 V AC, 300 V DC, Indicating (MPN FLSR03.5ID). Key specifications — Series: FLSR-ID.
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLSR-ID Series, Time-Delay, 3.5 A, 600 V AC, 300 V DC, Indicating (MPN FLSR03.5ID). Key specifications — Series: FLSR-ID.