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LITTELFUSE FLSR125 Time-Delay Blade Fuse, 125 A, 600 V AC, 300 V DC - Time-Delay Blade Fuses
LITTELFUSETime-Delay Blade Fuses

LITTELFUSE FLSR125 Time-Delay Blade Fuse, 125 A, 600 V AC, 300 V DC

The LITTELFUSE FLSR125 is a Class RK5, time-delay blade fuse rated at 125 A, 600 V AC and 300 V DC. Part of the FLSR Series, this non-indicating fuse is designed for overcurrent protection in industrial circuits. 3G…

SKU 3G-OTH-27345

Also listed as: FLSR 125 · FLSR-125

Brand
LITTELFUSE
Item
FLSR125 Time-Delay Blade Fuse, 125 A, 600 V AC, 300 V DC
Category
Time-Delay Blade Fuses
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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
FLSR125
Series
FLSR
Type
FLSR Series, Time-Delay, 125 A, Non-Indicating
AC
600 V
DC
300 V

Technical Documents

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

Product Description

The LITTELFUSE FLSR125 is a Class RK5, time-delay blade fuse rated at 125 A, 600 V AC and 300 V DC. Part of the FLSR Series, this non-indicating fuse is designed for overcurrent protection in industrial circuits. 3G Electric interprets your demand and sources this genuine component across 14 industrial departments — with specialist depth in electrical controls to support your application.

Frequently Asked Questions

What is the LITTELFUSE FLSR125 fuse used for?

The LITTELFUSE FLSR125 is a Class RK5 time-delay fuse rated 125 A, 600 V AC, 300 V DC. It protects motors, transformers, and other inductive loads from short circuits and overloads in industrial control panels, HVAC equipment, and distribution systems.

What are the specifications of the LITTELFUSE FLSR125 fuse?

The LITTELFUSE FLSR125 is a Class RK5, time-delay, non-indicating fuse rated 125 A, 600 V AC, 300 V DC. It belongs to the FLSR series and is designed for high inrush applications. The manufacturer part number is FLSR125.

Where to buy the LITTELFUSE FLSR125 fuse worldwide?

3G Electric supplies the LITTELFUSE FLSR125 fuse worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time on this Class RK5 time-delay fuse.

How to select the correct LITTELFUSE FLSR125 fuse for an application?

Select the LITTELFUSE FLSR125 fuse based on continuous current (125 A), system voltage (600 V AC or 300 V DC), and inrush characteristics. The time-delay feature handles motor starting surges. 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 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
LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 225 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR225)
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 225 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR225)
LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 75 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR075)
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LITTELFUSE Fuse: Class RK5, FLSR Series, Time-Delay, 75 A, 600 V AC, 300 V DC, Non-Indicating (MPN FLSR075)
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 125 A, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR125)
LITTELFUSE
LITTELFUSE Fuse: Class RK5, FLNR Series, Time-Delay, 125 A, 250 V AC, 125 V DC, Non-Indicating (MPN FLNR125)
Class RK5 time-delay blade fuse rated 200 A, 600 V AC, and 300 V DC. Non-indicating design from the FLSR series. Provides overcurrent protection with time-delay characteristics for handling inrush currents in industrial motor circuits, transformers, and similar equipment
LITTELFUSE
Class RK5 time-delay blade fuse rated 200 A, 600 V AC, and 300 V DC. Non-indicating design from the FLSR series. Provides overcurrent protection with time-delay characteristics for handling inrush currents in industrial motor circuits, transformers, and similar equipment
The LITTELFUSE FLSR070 is a Class RK5 time-delay blade fuse rated at 70 A, 600 V AC, and 300 V DC. It is part of the FLSR series and is non-indicating. This fuse is used for overcurrent protection in industrial circuits, such as motor, transformer, and lighting applications, where time-delay characteristics help avoid nuisance tripping during inrush currents
LITTELFUSE
The LITTELFUSE FLSR070 is a Class RK5 time-delay blade fuse rated at 70 A, 600 V AC, and 300 V DC. It is part of the FLSR series and is non-indicating. This fuse is used for overcurrent protection in industrial circuits, such as motor, transformer, and lighting applications, where time-delay characteristics help avoid nuisance tripping during inrush currents
The LITTELFUSE FLSR110 is a Class RK5 time-delay blade fuse rated for 110 A at 600 V AC and 300 V DC. Part of the FLSR Series, this non-indicating fuse provides overcurrent protection for branch circuits supplying motors, transformers, and other inductive loads in industrial power distribution and control panels
LITTELFUSE
The LITTELFUSE FLSR110 is a Class RK5 time-delay blade fuse rated for 110 A at 600 V AC and 300 V DC. Part of the FLSR Series, this non-indicating fuse provides overcurrent protection for branch circuits supplying motors, transformers, and other inductive loads in industrial power distribution and control panels

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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 provides overcurrent protection for industrial circuits, motors, and transformers where high inrush currents occur
LITTELFUSE
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 provides overcurrent protection for industrial circuits, motors, and transformers where high inrush currents occur
The LITTELFUSE FLNR400 is a Class RK5, time-delay blade fuse rated at 400 A, 250 V AC and 125 V DC. It is part of the FLNR Series and is non-indicating. This fuse provides overcurrent protection for industrial motor circuits, feeders, and branch circuits, with time-delay characteristics to accommodate inrush currents
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The LITTELFUSE FLNR400 is a Class RK5, time-delay blade fuse rated at 400 A, 250 V AC and 125 V DC. It is part of the FLNR Series and is non-indicating. This fuse provides overcurrent protection for industrial motor circuits, feeders, and branch circuits, with time-delay characteristics to accommodate inrush currents
Class RK5 time-delay blade fuse rated 125 A at 600 V AC and 300 V DC. Features a visual trip indicator for quick identification of a blown fuse. Suitable for motor circuits, transformers, and branch circuits with high inrush currents
LITTELFUSE
Class RK5 time-delay blade fuse rated 125 A at 600 V AC and 300 V DC. Features a visual trip indicator for quick identification of a blown fuse. Suitable for motor circuits, transformers, and branch circuits with high inrush currents
The LITTELFUSE FLNR150 is a Class RK5, time-delay blade fuse rated 150 A, 250 V AC and 125 V DC. It is non-indicating and part of the FLNR Series. Designed for overcurrent protection, its time-delay characteristic accommodates inrush currents from motors and transformers, making it suitable for industrial motor circuits, feeders, and branch circuits
LITTELFUSE
The LITTELFUSE FLNR150 is a Class RK5, time-delay blade fuse rated 150 A, 250 V AC and 125 V DC. It is non-indicating and part of the FLNR Series. Designed for overcurrent protection, its time-delay characteristic accommodates inrush currents from motors and transformers, making it suitable for industrial motor circuits, feeders, and branch circuits
Class RK5 time-delay blade fuse rated 110 A, 600 V AC and 600 V DC. Features an indicating function for blown-fuse detection. Suitable for motor and transformer protection in industrial power distribution systems
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Class RK5 time-delay blade fuse rated 110 A, 600 V AC and 600 V DC. Features an indicating function for blown-fuse detection. Suitable for motor and transformer protection in industrial power distribution systems
Class RK5 time-delay blade fuse rated 350 A at 250 V AC or 125 V DC. Non-indicating design. Provides overcurrent protection for industrial motor circuits, transformers, and equipment with high inrush currents
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Class RK5 time-delay blade fuse rated 350 A at 250 V AC or 125 V DC. Non-indicating design. Provides overcurrent protection for industrial motor circuits, transformers, and equipment with high inrush currents
The LITTELFUSE FLSR600 is a Class RK5, time-delay blade fuse rated 600 A at 600 V AC and 300 V DC. It is part of the FLSR Series and is non-indicating. This fuse provides overcurrent protection for industrial circuits, such as motor and transformer protection in power distribution systems, where its time-delay characteristic accommodates inrush currents
LITTELFUSE
The LITTELFUSE FLSR600 is a Class RK5, time-delay blade fuse rated 600 A at 600 V AC and 300 V DC. It is part of the FLSR Series and is non-indicating. This fuse provides overcurrent protection for industrial circuits, such as motor and transformer protection in power distribution systems, where its time-delay characteristic accommodates inrush currents
Class RK5 time-delay blade fuse rated 175 A at 600 V AC and 600 V DC. Features an indicating function for visual identification of a blown fuse. Suitable for overcurrent protection in industrial circuits, including motor and transformer applications
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Class RK5 time-delay blade fuse rated 175 A at 600 V AC and 600 V DC. Features an indicating function for visual identification of a blown fuse. Suitable for overcurrent protection in industrial circuits, including motor and transformer applications