We ship to the Philippines — door-to-door, customs and logistics handled by 3G Electric

3G Electric
RFQ CartGet a QuoteSign inSign up
LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 40 A, 600 V AC, 300 V DC - Time-Delay Cylindrical Fuses
LITTELFUSETime-Delay Cylindrical Fuses

LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 40 A, 600 V AC, 300 V DC

The LITTELFUSE FLSR040 is a Class RK5, time-delay cylindrical fuse rated at 40 A, 600 V AC and 300 V DC. As a non-indicating FLSR Series component, it provides overcurrent protection for industrial circuits. 3G…

SKU 3G-OTH-28511

Brand
LITTELFUSE
Item
Fuse: Class RK5, FLSR Series, Time-Delay, 40 A, 600 V AC, 300 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
FLSR040
Series
FLSR
Type
FLSR Series, Time-Delay, 40 A, Non-Indicating
AC
600 V
DC
300 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

Product Description

The LITTELFUSE FLSR040 is a Class RK5, time-delay cylindrical fuse rated at 40 A, 600 V AC and 300 V DC. As a non-indicating FLSR Series component, it provides overcurrent protection for industrial circuits. 3G Electric interprets your demand for genuine electrical protection, sources this exact OEM part, and supports your application across 14 industrial departments — with specialist depth in controls and power distribution.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the LITTELFUSE FLSR040 fuse used for?

The LITTELFUSE FLSR040 is a Class RK5 time-delay fuse rated 40 A, 600 V AC, 300 V DC. It protects motors, transformers, and lighting circuits against short circuits and overloads. Its time-delay characteristic allows it to withstand harmless inrush currents without nuisance opening.

What are the specifications of the LITTELFUSE FLSR040?

The LITTELFUSE FLSR040 is part of the FLSR series, a Class RK5 time-delay cylindrical fuse. It is rated 40 A, 600 V AC, 300 V DC, and is non-indicating. The manufacturer part number is FLSR040. It is designed for overcurrent protection in industrial power distribution.

Where to buy LITTELFUSE FLSR040 worldwide?

3G Electric supplies the LITTELFUSE FLSR040 fuse worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time. We source and deliver this fuse to any country.

How to select the correct LITTELFUSE FLSR040 fuse for an application?

Select the LITTELFUSE FLSR040 by matching its 40 A rating, 600 V AC or 300 V DC voltage, and Class RK5 time-delay characteristics to your circuit requirements. Ensure the fuse's interrupting rating exceeds available fault current. Consult the manufacturer's data sheet for motor or transformer protection guidelines.

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, FLSR Series, Time-Delay, 60 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR060). Key specifications — Series: FLSR.
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 60 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR060). Key specifications — Series: FLSR.
LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 45 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR045). Key specifications — Series: FLSR.
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 45 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR045). Key specifications — Series: FLSR.
LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 5.6 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR05.6). Key specifications — Series: FLSR.
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 5.6 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR05.6). Key specifications — Series: FLSR.
LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 50 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR050). Key specifications — Series: FLSR.
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 50 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR050). Key specifications — Series: FLSR.
LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 30 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR030). Key specifications — Series: FLSR.
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 30 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR030). Key specifications — Series: FLSR.
LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 35 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR035). Key specifications — Series: FLSR.
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 35 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR035). Key specifications — Series: FLSR.

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.