250R120-R3 datasheet(1/7 Pages) LITTELFUSE

部件名	250R120-R3

功能描述	Fast time - to - trip Access equipment Lan/Wan equipment

PDF	7 Pages

Scroll/Zoom	100%

制造商	LITTELFUSE [Littelfuse]

网页	http://www.littelfuse.com

标志

1 / 7 page

97

Revised: August 31, 2011

POLY-FUSE® Resettable PTCs

250R Series

Radial Leaded > 250R Series

Speciﬁcations are subject to change without notice.

Please refer to www.littelfuse.com/series/250R.html for current information.

The 250R Series is designed to protect against short

duration high voltage fault currents (power cross or power

induction surge) typically found in telecom applications

(250Vrms). The series can be used to help telecom

networking equipment meet the protection requirements

speciﬁed in ITU K.20 and K.21.

Electrical Characteristics

Part Number

I

hold

(A)

I

trip

(A)

V

max

V

int / Vop

I

max

(A)

P

d

typ.

(W)

MaximumTime

ToTrip

Resistance

Agency

Approvals

Current

(A)

Time

(Sec.)

R

min

(Ω)

R

typ

(Ω)

R

1max

(Ω)

250R080

0.08

0.16

250/60

3

1

0.35

3

14

22

33

XX

250R080T

0.08

0.16

250/60

3

1

0.35

3

15

22

33

XX

250R120

0.12

0.24

250/60

3

1

1.5

4

8

16

XX

250R120-RA

0.12

0.24

250/60

3

1

1.0

7

9

16

XX

250R120-RC

0.12

0.24

250/60

3

1

0.85

5.4

7.5

14

XX

250R120-RF

0.12

0.24

250/60

3

1

0.7

6

10.5

16

XX

250R120-R1

0.12

0.24

250/60

3

1

0.8

6

9

16

XX

250R120-R2

0.12

0.24

250/60

3

1

0.7

8

10.5

16

XX

250R120-R3

0.12

0.24

250/60

3

1

8

10

16

XX

250R120T

0.12

0.24

250/60

3

1

1.2

7

12

16

XX

250R145

0.145

0.29

250/60

3

1

2.5

3

6

14

XX

250R145-RA

0.145

0.29

250/60

3

1

5

3

5.5

12

XX

250R145-RB

0.145

0.29

250/60

3

1

2.5

4.5

6

14

XX

250R145T

0.145

0.29

250/60

3

1

2.0

5.4

7.5

14

XX

250R180

0.18

0.65

250/60

10

1.8

1

21

0.8

2.2

4

XX

250R180T

0.18

0.65

250/60

10

1.8

1

20

1.4

3.9

4.5

XX

Items with T at end of part number = pre-tripped device. See Part Ordering Number System section of this data sheet for additional information.

Description

Features

Applications

range, 60VDC operating

voltage

resistance ranges available

Equipment (CPE)

telecom centers

250R Series

Agency Approvals

AGENCY

AGENCY FILE NUMBER

E183209

R50120008

I

hold

I

trip

V

int

V

op= The device regular operation voltage

I

)

P

d

R

min = Minimum resistance of device in initial (un-soldered) state.

R

typ = Typical resistance of device in initial (un-soldered) state.

R

Caution: Operation beyond the speciﬁed rating may result in damage and possible arcing

and ﬂame.

类似零件编号 - 250R120-R3

制造商	部件名	数据表	功能描述
Littelfuse	250R120-R3	378Kb / 6P	POLYFUSE Resettable PTCs Radial Leaded
	250R120-R3	619Kb / 7P	POLY-FUSE짰 Resettable PTCs Radial Leaded > 250R Series
	250R120-R3	267Kb / 7P	POLYFUSE짰 Resettable PTCs
	250R120-R3	619Kb / 7P	POLY-FUSE Resettable PTCs
	250R120-R3	729Kb / 7P	The 250R Series is designed to protect against short duration high voltage fault currents

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