Rev: 020614

littelfuse.com

1 of 2

Class RK1 – KlNR • KlsR seRies FUses

250/600 Vac • Fast-Acting • 1-600 A

ampeRe RatiNgs

1

10

40

100

250

2

12

45

110

300

3

15

50

125

350

4

20

60

150

400

5

25

70

175

450

6

30

80

200

500

8

35

90

225

600

Web Resources

Download TC Curves, CAD drawings and other technical

information: littelfuse.com/klsr

littelfuse.com/klnr

05549002

Peak Let-Thru Curve (600 V)

Ordering Information

seRies

ampeRage

Catalog NUmbeR oRdeRiNg NUmbeR

KLSR

90

KLSR090

KLSR090.V

600 V

250 V

seRies

ampeRage

Catalog NUmbeR oRdeRiNg NUmbeR

KLNR

90

KLNR090

KLNR090.V

KLSR

Description

KLSR/KLNR fuses are an economical single element design

providing the safety of an RK1 fuse.

Applications

• Resistance heaters

• Lighting circuits

• Non-inductive loads

Features/Benefits

• Extremely Current-Limiting

• Indicating and DIN mount fuse holders available

Specifications

Voltage Ratings

AC: 250 V (KLNR); 600 V (KLSR)

DC: 125 V (1 – 600 A KLNR);

250 V (1 – 30 A KLSR);

300 V (35 – 600 A KLSR).

Interrupting Ratings

AC: 200 kA rms symmetrical

DC: 20 kA

Ampere Range

1 – 600 A

Approvals

AC: Standard 248-12, Class RK1

UL Listed (File: E81895)

CSA Certified (File: LR29862)

DC: Littelfuse self-certified

Recommended Fuse Holders

LFR60 Series - LFR25 Series