CMF-RD Bourns, Inc., CMF-RD Datasheet

CMF-RD

Manufacturer Part Number

CMF-RD

Description

Cmf-rd Series - Telecom Cptc Resettable Fuses

Manufacturer

Bourns, Inc.

Datasheet

1.CMF-RD.pdf (2 pages)

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Test

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 µs, 25 ohms, 1.0 kV, 10 Tests, every 1 Min. ..................(Ri-Rf) / Ri < ±10 %

Lightning Surge......................................................................10/1000 µs, 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.

Packaging options: BULK: 96 pcs. per plastic box

Electrical Characteristics

Product Dimensions

CMF-RD50

CMF-RD50-10

Test Procedures And Requirements For Model CMF-RD Series

(.236)

Model

6.0

(.236)

0.6

(.346 ± .008)

8.8 ± 0.2

SIDE

TOP

(.138)

3.5

(.030)

0.75

Withstand

Induction

Voltage

VAC

600

(.059)

(.079)

1.5

2.0

(.197 ± .008)

(.098 ± .004)

5.0 ± 0.2

2.5 ± 0.1

Voltage

Rated

Volts

230

Ohms

(.394 ± .008)

Primary

Protection

10.0 ± 0.2

Resistance

BOTTOM

FRONT

Rated

CMF-RD Series - Telecom CPTC Resettable Fuses

(RN)

(.014)

Features

0.35

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*

Tolerance

±20 %

±10 %

(.197 ± .008)

(.366 ± .008)

(.346 ± .008)

5.0 ± 0.2

9.3 ± 0.2

Test Condition

8.8 ± 0.2

Resistance

In Housing

(.185 ± .039)

Matching

4.7 ± 0.1

Ohms

± 0.5

DIMENSIONS =

1 & 3 = FRONT PINS

2 & 4 = BACK PINS

PINS 1 & 2 = 1ST CPTC

PINS 3 & 4 = 2ND CPTC

Customers should verify actual device performance in their specific applications.

Current

@ 25 °C

(INCHES)

Amps

Hold

0.09

Current

@ 40 °C

Amps

Hold

0.06

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

Represents total content. Layout may vary.

Product Designator

Style

Rated Resistance (RN)

Rated Resistance Tolerance

Packaging Options

Applications

device in:

Used as a secondary overcurrent protection

Blank = ±20 % (Standard)

Typical Part Marking

PART

IDENTIFICATION:

50M = CMF-RD50

50K = CMF-RD50-10

How to Order

RD = Radial Dual Package

50 (50 Ohms)

-10 = ±10 %

Customer Premise Equipment (CPE)

Central Office (CO)

Access equipment

- 0 = Bulk Packaging

Specifications are subject to change without notice.

CERAMIC

CASE

Current

@ 25 °C

Amps

0.19

Trip

CMF - RD 50 - 10 - 0

C5 0M 7G

230 VAC

Imax @

Amps

Requirements*

3.0

MANUFACTURER'S

TRADEMARK

BI-WEEKLY

DATE CODE:

WEEK 13-14 = G

230 VAC

Seconds

@ Imax/

YEAR CODE:

7 = 2007

to Trip

< 0.1

Time

Related parts for CMF-RD

CMF-RD Summary of contents

Page 1

... CMF-RD50-10 600 230 Test Procedures And Requirements For Model CMF-RD Series Test Mains Power Contact - ITU-T K.20, K.21 ....None................230 V rms, 10 ohms, 15 Min. ......................................................(Ri-Rf < ±10 % Power Induction - ITU-T K.20, K.21..............None................600V rms, 600 ohms, 0.2 seconds, 10 cycles, every 1 Min. ......(Ri-Rf < ±10 % Power Induction - ITU-T K.20, K.21..............GDT ................600 V rms, 600 ohms, 1 second, 10 cycles, every 1 Min. ..........(Ri-Rf < ±10 % Power Induction - ITU-T K.20, K.21..............GDT ................600 V rms, 200 ohms, 1 second, 10 cycles, every 1 Min. ..........(Ri-Rf < ...

Page 2

... Reliable Electronic Solutions CMF-RD SERIES, REV. A, 04/07 COPYRIGHT© 2007, BOURNS, INC. LITHO IN U.S.A., MF0705 03/07 Asia-Pacific: Tel: +886-2 2562-4117 • Fax: +886-2 2562-4116 Europe: Tel: +41-41 768 5555 • Fax: +41-41 768 5510 The Americas: Tel: +1-951 781-5500 • Fax: +1-951 781-5700 www.bourns.com ...

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