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LITTELFUSE FLNR040ID Class RK5 Time-Delay Indicating Fuse - Time-Delay Cylindrical Fuses
LITTELFUSETime-Delay Cylindrical Fuses

LITTELFUSE FLNR040ID Class RK5 Time-Delay Indicating Fuse

The LITTELFUSE FLNR-ID Series FLNR040ID is a Class RK5, time-delay cylindrical fuse rated at 40 A, 250 V AC and 125 V DC, with an indicating feature. 3G Electric interprets your demand for overcurrent protection and…

SKU 3G-OTH-27955

Brand
LITTELFUSE
Item
FLNR040ID Class RK5 Time-Delay Indicating Fuse
Category
Time-Delay Cylindrical 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
FLNR040ID
Series
FLNR-ID
Type
FLNR-ID Series, Time-Delay, 40 A, 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 FLNR-ID Series FLNR040ID is a Class RK5, time-delay cylindrical fuse rated at 40 A, 250 V AC and 125 V DC, with an indicating feature. 3G Electric interprets your demand for overcurrent protection and sources this genuine industrial fuse across 14 departments — with specialist depth in electrical controls to ensure the right solution.

Frequently Asked Questions

What is the LITTELFUSE FLNR040ID fuse used for?

The LITTELFUSE FLNR040ID is a Class RK5 time-delay fuse used for motor and transformer protection in industrial power distribution. Its 40 A rating and 250 V AC / 125 V DC capacity make it suitable for branch circuits and equipment requiring overload and short-circuit protection.

What are the specifications of the LITTELFUSE FLNR040ID?

The LITTELFUSE FLNR040ID is a Class RK5, time-delay fuse rated 40 A, 250 V AC, and 125 V DC. It belongs to the FLNR-ID series and features an indicating function for blown-fuse detection. The manufacturer part number is FLNR040ID.

Where to buy the LITTELFUSE FLNR040ID worldwide?

3G Electric supplies the LITTELFUSE FLNR040ID 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 on this Class RK5 time-delay fuse.

How to select the correct LITTELFUSE FLNR-ID fuse for an application?

Select the LITTELFUSE FLNR-ID fuse by matching voltage (250 V AC or 125 V DC) and current rating (40 A for FLNR040ID) to your circuit requirements. Time-delay fuses are ideal for motor starts; verify the Class RK5 rejection feature fits your fuse holder. 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 cylindrical 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, FLNR-ID Series, Time-Delay, 45 A, 250 V AC, 125 V DC, Indicating (MPN FLNR045ID)
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LITTELFUSE Fuse: Class RK5, FLNR-ID Series, Time-Delay, 45 A, 250 V AC, 125 V DC, Indicating (MPN FLNR045ID)
LITTELFUSE Fuse: Class RK5, FLNR-ID Series, Time-Delay, 60 A, 250 V AC, 125 V DC, Indicating (MPN FLNR060ID)
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LITTELFUSE Fuse: Class RK5, FLNR-ID Series, Time-Delay, 60 A, 250 V AC, 125 V DC, Indicating (MPN FLNR060ID)
LITTELFUSE Fuse: Class RK5, FLNR-ID Series, Time-Delay, 35 A, 250 V AC, 125 V DC, Indicating (MPN FLNR035ID)
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LITTELFUSE Fuse: Class RK5, FLNR-ID Series, Time-Delay, 35 A, 250 V AC, 125 V DC, Indicating (MPN FLNR035ID)
LITTELFUSE Fuse: Class RK5, FLNR-ID Series, Time-Delay, 50 A, 250 V AC, 125 V DC, Indicating (MPN FLNR050ID)
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LITTELFUSE Fuse: Class RK5, FLNR-ID Series, Time-Delay, 50 A, 250 V AC, 125 V DC, Indicating (MPN FLNR050ID)
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 40 A, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR040)
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LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 40 A, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR040)
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 10 A, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR010)
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LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 10 A, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR010)

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