Telecom Fuses

TF 600

www.schurter.com/pg0_3

Fuses

3. Use Agency Specification based on the requirement

Lighting Surge Specifications

Surges are short-duration increases in system voltage due to external events, such as lightning

Telcordia

First Level

First Level

First Level

First Level

First Level

Second Level

GR-1089

Test 1

Test 2

Test 3

Test 4

Test 5

Test 1

Surge Voltage [V]

600

1000

1000

2500

1000

6000

Surge Current [A]

100

100

100

500

25

500

Waveform [us]

10x1000

10x360

10x1000

2x10

10x360

2x10

Repetitions [each polarity]

25

25

25

10

5

1

2000.0010.xx, 0.5 A

*

*

*

*

✓

2000.0011.xx, 1.25 A

✓

✓

✓

✓

✓

✓

2000.0012.xx, 2.0 A

✓

✓

✓

✓

✓

✓

■

Equipment under test can not be damaged & must continue to operate properly

* If sufficient series resistance is used, the 0.5 A fuse may pass Test 1-4

TIA-968-A

Type A

Type A

Type B

Type B

(former FCC Part 68) Metallic

Longitudinal

Metallic

Longitudinal

Surge Voltage [V]

800

1500

1000

1500

Surge Current [A]

100

200

25

37.5

Waveform [us]

10x560

10x160

5x320

5x320

Repetitions [each polarity]

1

1

1

1

2000.0010.xx, 0.5 A

Fuse open

Fuse open

✓

✓

2000.0011.xx, 1.25 A

✓

✓

✓

✓

2000.0012.xx, 2.0 A

✓

✓

✓

✓

■

Fuse can not open during type B events

ITU-T K.20

Test

Surge Voltage [V]

1000

Surge Current [A]

67

Waveform [us]

10x700

Repetitions [each polarity]

10

2000.0010.xx, 0.5 A

26 A*

2000.0011.xx, 1.25 A

✓

2000.0012.xx, 2.0 A

✓

■

Fuse does not open during test

* If sufficient series resistance is used, the 0.5 A fuse may pass

Power Cross Specifications

A power-cross is an instance where a high-voltage circuit is inadvertently connected to a low-voltage circuit;

for example, a power line can fall onto a telephone line during a storm initiating a power-cross event.

Telcordia

First Level

First Level

First Level First Level

First Level First Level

First Level First Level First Level

GR-1089

Test 1

Test 2

Test 3

Test 4

Test 5

Test 6

Test 7

Test 8

Test 9

Voltage [Vrms]

50

100

200, 400, 600

1000

see GR-1089

600

440

600

1000

Overload Current [A]

0.33

0.17

1

1

0.5

2.2

3

5

Duration

15 min.

15 min.

60x1 s

60x1 s

60x5 s

30 s

5x2 s

1.1 s

0.5 s

2000.0010.xx, 0.5 A

2000.0011.xx, 1.25 A

✓

✓

✓

✓

✓

✓

✓

✓

✓

2000.0012.xx, 2.0 A

✓

✓

✓

✓

✓

✓

✓

✓

✓

■

Fuse not allowed to open

Telcordia

Second Level Second Level Second Level Second Level Second Level

GR-1089

Test 1

Test 2

Test 3

Test 4

Test 5

Voltage [Vrms]

120, 277

600

600

100-600

see GR-1089

Overload Current [A]

25

60

7

2.2

Duration

15 min.

5 s

5 s

15 min.

15 min.

2000.0010.xx, 0.5 A

✓

✓

✓

✓

✓

2000.0011.xx, 1.25 A

✓

✓

✓

✓

*

✓

2000.0012.xx, 2.0 A

✓

✓

✓

✓

*

✓

■

Fuse opens in a safe and controlled manner before wiring simulator fuse (MDL 2.0)

* Fuse does not open during test

ITU-T K.20

Power

Power

Induction Contact

Voltage [Vrms]

300

250

Current [A]

0.5

60

Duration

200 ms

15 min.

Repetitions

5

1

2000.0010.xx, 0.5 A ✓

✓

*

2000.0011.xx, 1.25 A ✓

✓

*

2000.0012.xx, 2.0 A ✓

✓

*

■

Fuse does not open during test

* Fuse opens during test

UL 60950

Longitudinal Longitudinal

Longitudinal

Longitudinal Longitudinal

Metallic

Metallic

Metallic

Metallic

IEC 60950

Test 1

Test 2

Test 3

Test 4

Test 5

Test 1

Test 2

Test 3

Test 4

Voltage [V]

600

600

600

200

120

600

600

600

600

Current [A]

40

7

2.2

2.2

25

40

7

2.2

2.2

Time

1.5 s

5 s

30 min.

30 min.

30 min.

1.5 s

5 s

30 min.

30 min.

2000.0010.xx, 0.5 A

✓

✓

✓

✓

✓

✓

✓

✓

✓

2000.0011.xx, 1.25 A

✓

✓

✓

*

✓

*

✓

✓

✓

✓

*

✓

*

2000.0012.xx, 2.0 A

✓

✓

✓

*

✓

*

✓

✓

✓

✓

*

✓

*

■

Fuse opens in a safe and controlled manner before wiring simulator fuse (MDL 2.0)

* Fuse does not open during test

Thespecifications,descriptionsandillustrationsindicatedinthisdocumentarebasedon

currentinformation.Allcontentissubjecttomodificationsandamendments.