Littelfuse Class RK1 Fuses
LLSRK_ID Series
Littelfuse’s RK1 fuses are extremely current limiting, they reduce or eliminate damage to circuits and equipment under short-circuit conditions.
Amperage range (A): 1/10 – 600A
Voltage ratings (Vac): 250V, 600V
Voltage ratings (Vdc): 125V, 300V
Features:
- POWR-PRO performance
- Indication available
- Dual-element design
- Extremely current limiting
- IEC type 2 “No Damage” protection to IEC an NEMA type motor starters
- Indicating and DIN mount fuse holders available
Applications:
- All general purpose circuits
- Motors
- Transformers
- Safety upgrades
LLSRK Series
The LLSRK series features POWR-PRO performance and IEC Type 2 “No Damage” protection to IEC and NEMA type motor starters.
Amperage range (A): 1/10 – 600A
Voltage ratings (Vac): 250V, 600V
Voltage ratings (Vdc): 125V, 300V
Features:
- POWR-PRO performance
- Indication available
- Dual-element design
- Extremely current limiting
- IEC Type 2 “No Damage” protection to IEC and NEMA type motor starters
- Indicating and DIN mount fuse holders available
Applications:
- All general purpose circuits
- Motors
- Transformers
- Safety upgrades
KLSR Series
Littelfuse’s KLSR fuses are a cost-effective single element design providing the safety of an RK1 fuse.
Amperage range (A): 1 - 600A
Voltage ratings (Vac): 250V, 600V
Voltage ratings (Vdc): 125V, 250V, 300V
Features:
- Extremely current limiting
- Indicating and DIN mount fuse holders
Applications:
- Resistance heaters
- Lighting circuits
- Non-inductive loads
KLNR Series
Littelfuse’s KLSR/KLNR fuses are a cost-effective single element design providing the safety of an RK1 fuse.
Amperage range (A): 1/10 – 600A
Voltage ratings (Vac): 250V, 600V
Voltage ratings (Vdc): 125V, 300V
Features:
- Extremely current limiting
- Indicating and DIN mount fuse holders available
Applications:
- Resistance heaters
- Lighting circuits
- Non-inductive loads
For further information on Littelfuse’s Class RK1 Fuses please call our team today on: 01444 243 452 or email: .(JavaScript must be enabled to view this email address).

Littelfuse
Littelfuse is a global manufacturer of leading technologies in circuit protection, power control, and sensing. Littelfuse products are found in automotive and commercial vehicles, industrial applications, data and telecommunications, medical devices, consumer electronics, and appliances. They partner with customers to design, manufacture, and deliver innovative, high-quality solutions, for a safer, greener, and increasingly connected world—everywhere, every day.
Further information:
You can find further information on Littelfuse using the following links:
Tel: 01444 243 452
Fax: 01444 870 722
Email: enquiries@gdrectifiers.co.uk
