Littelfuse KLLU series Catalog Page

POWR-GARD® Fuse Datasheet

UL Class L

KLLU SERIES FUSES

600 VAC • Time-Delay • 601-4000 Amperes

Specifications

Voltage Ratings: AC: 600 V
DC: 300 V

Interrupting Ratings: AC: 200 kA
DC: 20 k A

Ampere Range: 601–4000 A
Approvals: Standard 248-10, Class L

UL Listed (File No. E81895)
CSA Certified (File No. LR29862)
DC: Littelfuse self-certified

Ordering Information

AMPERE RAT INGS

601 750 1000 1400 1800 3000
650 800 1200 1500 2000 3500
700 900 1350 1600 2500 4000

Description

KLLU series fuses meet or exceed UL requirements for
UL Class L fuses. The KLLU series offers an economical
alternative to KLPC POWR-PRO
peak let through current.

®

fuse with a slightly higher

Applications

• Service switches

• Switchboard mains and feeders

• Motor control center mains

• Large motor branch circuits

• Circuit breaker protection

Features/Benefits

• Current-Limiting

• Easily coordinated with other system components

• 200 kA AC Interrupting Rating

SERIES AMPER AGE CATALOG N UMBE R SYS TEM NUMBER

KLLU 601 KLLU601 KL LU 60 1.X

Web Resources

TC Curves, downloadable CAD drawings and other technical
information: www.littelfuse.com/kllu

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©June 2011 Littelfusewww.littelfuse.com

POWR-GARD® Fuse Datasheet

UL Class L

CLASS L CURRENT-LIMITING EFFECTS

Current-Limiting Effects of KLLU (600 V) Fuses

SHORT-CIRCUIT

CURRENT*

5,000

10,000

15,000

20,000

25,000

30,000

35,000

40,000

50,000

60,000

APPA REN T RMS S YMMETRICA L CURRENT FOR VARIOUS F USE R ATINGS

80 0 A 120 0 A 1600 A 2000 A 3000 A 4000 A

5,000 5,000 5,000 5,000 5,000 5,000

10,000 10,000 10,000 10,000 10,000 10,000

11,900 15,000 15,000 15,000 15,000 15,000

13,000 18,500 20,000 20,000 20,000 20,000

14,000 20,000 25,000 25,000 25,000 25,000

14,500 21,000 26,500 30,000 30,000 30,000

15,000 22,000 28,500 34,000 35,000 35,000

16,000 23,000 30,000 35,000 37,000 40,000

17,000 24,000 32,000 38,000 39,000 44,000

18,000 26,000 34,000 42,000 43,000 50,000

80,000

100,000

150,000

200,000

*Prospective RMS Sym met ri cal Amperes Shor t-Circuit Current

Note: Data derived from Pe ak Let-Thru Curves

19,000 28,000 36,000 44,000 46,000 54,500

21,000 30,000 38,000 46,000 48,000 57,500

24,000 35,000 44,000 50,000 51,000 68,000

26,000 38,000 48,000 53,000 60,000 74,000

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©June 2011 Littelfusewww.littelfuse.com