CMF-RD50-10-0【PDF 1/2 页】CPTC FUSE RESETTABLE

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Sheet目录1201

[1页]2页

Features

Applications

■

Two resistance-matched PTCs in a

ceramic housing

Aids compliance with:

- ITU-T K.20/21/45

- Telcordia GR-1089-CORE

- UL 60950, 3rd Ed.

Narrow resistance tolerance

RoHS compliant*

Used as a secondary overcurrent protection

device in:

■ Customer Premise Equipment (CPE)

■ Central Office (CO)

■ Access equipment

CMF-RD Series - Telecom CPTC Resettable Fuses

Electrical Characteristics

Time

Induction

Rated

Resistance

to Trip

Voltage

Rated

Resistance

Matching

Hold

Trip

Imax @

@ Imax/

Model

Withstand

Voltage

(RN)

In Housing

Current

230 VAC

Amps

VAC

Volts

Ohms

Tolerance

Ohms

@ 25 °C

@ 40 °C

@ 25 °C

Amps

Seconds

CMF-RD50

CMF-RD50-10

600

230

±20 %

±10 %

± 0.5

0.09

0.06

0.19

3.0

< 0.1

Test Procedures And Requirements For Model CMF-RD Series

Primary

Test Protection Test Condition Requirements*

Mains Power Contact - ITU-T K.20, K.21 ....None................230 V rms, 10 ohms, 15 Min. ......................................................(Ri-Rf) / Ri < ±10 %

Power Induction - ITU-T K.20, K.21..............None................600V rms, 600 ohms, 0.2 seconds, 10 cycles, every 1 Min. ......(Ri-Rf) / Ri < ±10 %

Power Induction - ITU-T K.20, K.21..............GDT ................600 V rms, 600 ohms, 1 second, 10 cycles, every 1 Min. ..........(Ri-Rf) / Ri < ±10 %

Power Induction - ITU-T K.20, K.21..............GDT ................600 V rms, 200 ohms, 1 second, 10 cycles, every 1 Min. ..........(Ri-Rf) / Ri < ±10 %

Lightning Surge - ITU-T K.20, K.21 ......................................10/700 μ s, 25 ohms, 1.0 kV, 10 Tests, every 1 Min. ..................(Ri-Rf) / Ri < ±10 %

Lightning Surge......................................................................10/1000 μ s, 40 ohms, 1.0 kV, 30 Tests, every 3 Min. ................(Ri-Rf) / Ri < ±10 %

Overvoltage Withstand ..........................................................300 V, 3 A, 4 Hours, 1 Time ........................................................(Ri-Rf) / Ri < ±10 %

Failure Mode ..........................................................................300 V, RL=0, 60 Min. ..................................................................**

Ri = R initial

Rf = R final

** Circuit disconnected or high resistance is acceptable.

Product Dimensions

Typical Part Marking

SIDE

8.8 ± 0.2

(.346 ± .008)

FRONT

10.0 ± 0.2

(.394 ± .008)

Represents total content. Layout may vary.

MANUFACTURER'S

TRADEMARK

CERAMIC

CASE

1.5

(.059)

9.3 ± 0.2

(.366 ± .008)

1 & 3 = FRONT PINS

2 & 4 = BACK PINS

PART

IDENTIFICATION:

50M = CMF-RD50

50K = CMF-RD50-10

C50M7G

BI-WEEKLY

DATE CODE:

WEEK 13-14 = G

YEAR CODE:

7 = 2007

4.7 ± 0.1

0.75

2.0

0.35

(.185 ± .039)

0.6

(.236)

(.030)

TOP

(.079)

(.014)

BOTTOM

How to Order

CMF - RD 50 - 10 - 0

Product Designator

Style

6.0

(.236)

5.0 ± 0.2

(.197 ± .008)

8.8 ± 0.2

(.346 ± .008)

PINS 1 & 2 = 1ST CPTC

PINS 3 & 4 = 2ND CPTC

RD = Radial Dual Package

Rated Resistance (RN)

50 (50 Ohms)

Rated Resistance Tolerance

-10 = ±10 %

Blank = ±20 % (Standard)

3.5

(.138)

2.5 ± 0.1

(.098 ± .004)

5.0 ± 0.2

(.197 ± .008)

Packaging Options

- 0 = Bulk Packaging

Packaging options: BULK: 96 pcs. per plastic box

DIMENSIONS =

(INCHES)

*RoHS Directive 2002/95/EC Jan 27 2003 including Annex.

Specifications are subject to change without notice.

Customers should verify actual device performance in their specific applications.

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