Littelfuse.com

Rev: 012413

2 of 3

Class T – JllN / Jlls series FUses

shorT

CirCUiT

CUrreNT*

appareNT rms symmeTriCal CUrreNT For

varioUs FUse raTiNgs

30 a 60 a 100 a 200 a 400 a 600 a 800 a 1200 a

5,000

750

1,225 1,400

2,850

4,600

5,000

5,000

5,000

10,000

945

1,525

1,700

3,600

6,000

8,500

9,400 10,000

15,000

1,050 1,700 2,000

4,050

6,600

9,750 10,500 13,000

20,000

1,150 1,900 2,200

4,450

7,250 10,500 11,000 14,750

25,000 1,300 2,050 2,400

4,800

8,000 11,500 12,500 15,500

30,000 1,375 2,150 2,450

5,000

8,250 12,000 13,750 16,500

35,000 1,400 2,250 2,600

5,100

8,500 13,000 14,000 17,000

40,000 1,425 2,400 2,800

5,200

8,700 14,000 14,750 18,000

50,000 1,600 2,450 2,900

6,000

9,500 14,500 16,000 20,000

60,000 1,650 2,625 3,100

6,250 10,000 15,500 17,300 21,000

80,000 1,825 2,800 3,400

7,000 11,000 17,000 18,750 23,000

100,000 2,000 3,100 3,700

7,250 12,000 18,000 20,000 25,000

150,000 2,250 3,400 4,300

8,500 13,000 21,000 23,000 28,500

200,000 2,450 3,800 4,600

9,000 15,000 23,000 25,000 31,000

*Prospective RMS Symmetrical Amperes Short-Circuit Current

Note: Data Derived from Peak Let-Thru Curves

shorT

CirCUiT

CUrreNT*

appareNT rms symmeTriCal CUrreNT For

varioUs FUse raTiNgs

30 a 60 a 100 a 200 a 400 a 600 a 800 a 1200 a

5,000

700

775

1,100

1,650

3,500

4,000

5,000

5,000

10,000

900

1,000 1,400

2,100

4,400

5,100

6,750

8,250

15,000

1,000 1,100 1,600

2,400

5,000

5,900

7,750 10,000

20,000

1,100 1,250 1,800

2,700

5,500

6,500

8,750 11,000

25,000

1,230 1,300 1,950

2,900

6,000

7,000

9,500 12,000

30,000

1,300 1,475 2,050

3,100

6,400

7,500 10,000 12,500

35,000

1,330 1,575 2,150

3,300

6,750

7,750 10,500 13,500

40,000

1,430 1,600 2,300

3,500

7,000

8,000 11,000 14,000

50,000

1,500 1,750 2,400

3,700

7,500

8,750 12,000 15,000

60,000

1,700 1,900 2,700

4,000

8,000

9,500 12,500 16,000

80,000

1,850 2,100 2,800

4,400

9,000 10,500 14,000 17,500

100,000 2,000 2,250 3,150

4,800

9,750 11,500 15,000 18,500

150,000 2,300 2,600 3,600

5,500 11,000 13,000 17,500 22,000

200,000 2,600 2,800 3,900

6,000 12,000 14,500 19,500 24,000

*Prospective RMS Symmetrical Amperes Short-Circuit Current

Note: Data Derived from Peak Let-Thru Curves

100

200

300

400

600

800

1000

2000

3000

4000

6000

8000

10000

20000

30000

40000

60000

80000

100000

200000

300000

400000

600000

800000

1000000

1200A

800A

600A

400A

200A

100A

60A

30A

AVAILABLE FAULT CURRENT

SYMMETRICAL R. M. S. AMPERES

100

200

300

400

600

800

1000

2000

3000

4000

6000

8000

10000

20000

30000

40000

60000

80000

100000

200000

300000

400000

600000

800000

1000000

800A

600A

400A

200A

100A

60A

30A

AVAILABLE FAULT CURRENT

SYMMETRICAL R. M. S. AMPERES

JLLS

JLLN

100

200

300

400

600

800

1000

2000

3000

4000

6000

8000

10000

20000

30000

40000

60000

80000

100000

200000

300000

400000

600000

800000

1000000

1200A

800A

600A

400A

200A

100A

60A

30A

AVAILABLE FAULT CURRENT

SYMMETRICAL R. M. S. AMPERES

100

200

300

400

600

800

1000

2000

3000

4000

6000

8000

10000

20000

30000

40000

60000

80000

100000

200000

300000

400000

600000

800000

1000000

800A

600A

400A

200A

100A

60A

30A

AVAILABLE FAULT CURRENT

SYMMETRICAL R. M. S. AMPERES

JLLS

JLLN

Peak Let-Thru Curve and Current-Limiting Effects of JLLN (300 V) Fuses

Peak Let-Thru Curve and Current-Limiting Effects of JLLS (600 V) Fuses