Features Applications
n Radial leaded devices Used as a secondary overcurrent protection
device in:
n Aids compliance with:
- ITU-T K.20/21/45 n Customer Premise Equipment (CPE)
- Telcordia GR-1089-CORE
n Central Office (CO)
- UL 60950, 3rd Ed.
n Access equipment
n Narrow resistance tolerance
n Agency recognition:
n RoHS compliant*
CMF-RL Series - Telecom CPTC Resettable Fuses
Electrical Characteristics
Rated
Induction Packaging Time to Trip
Resistance
Voltage Rated Resistance Hold Trip Imax @ @ Imax / 220
Model
Withstand Voltage (RN) Matching Current Current 220 VAC VAC
Ohms Amps Amps Amps Seconds
VAC Volts Ohms Tolerance @ 25 C @ 25 C @ 25 C @ 25 C @ 25 C
CMF-RL10 600 220 10 20 % 0.5 0.15 0.30 3 0.45
CMF-RL10-10 600 220 10 10 % 0.5 0.15 0.30 3 0.45
CMF-RL25** 600 220 25 20 % 0.5 0.100 0.200 3 0.3
CMF-RL25U** 600 220 25 20 % 0.5 0.060 0.150 0.9 0.25
CMF-RL35 600 220 35 20 % 0.5 0.075 0.150 3 0.15
CMF-RL35-10 600 220 35 10 % 0.5 0.075 0.150 3 0.15
CMF-RL35A 600 220 35 10 % 0.5 0.075 0.150 3 0.15
CMF-RL35A-10 600 220 35 10 % 0.5 0.075 0.150 3 0.15
CMF-RL50 600 220 50 20 % 0.5 0.065 0.150 3 0.15
CMF-RL50-10 600 220 50 10 % 0.5 0.065 0.150 3 0.15
CMF-RL50A 600 220 50 20 % 0.5 0.050 0.100 3 0.1
CMF-RL50A-10 600 220 50 10 % 0.5 0.050 0.100 3 0.1
CMF-RL55 600 220 55 20 % 0.5 0.065 0.150 3 0.15
CMF-RL55-10 600 220 55 10 % 0.5 0.065 0.150 3 0.15
CMF-RL55A 600 220 55 20 % 0.5 0.050 0.100 3 0.1
CMF-RL55A-10 600 220 55 10 % 0.5 0.050 0.100 3 0.1
Operating Temperature Range: -40C to +125 C
** UL recognition pending
Test Procedures And Requirements For Model CMF-RL 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 s, 25 ohms, 1.0 kV, 10 Tests, every 1 Min. .................(Ri-Rf) / Ri < 10 %
Lightning Surge ................................................................... 10/1000 s, 40 ohms, 1.0 kV, 30 Tests, every 3 Min. ...............(Ri-Rf) / Ri < 10 %
Ri = R initial Rf = R final
Test Model Test Condition Passing Criteria
UL 1950 ..........................................CMF-RL50***............... 600 V / 2.2 A for 30 minutes. .............................No charring cheesecloth indicator
600 V / 7 A for 5 seconds
600 V / 40 A for 1.5 seconds
***For other models, please contact Bourns.
UL File Number ........................................... E307915 ....... CMF-RL Series - Telecom CPTC Resettable Fuses
How to Order
Typical Part Marking
Represents total content. Layout may vary.
CMF - RL 50 __ A -10 - 0
PART MANUFACTURER'S Product Designator
IDENTIFICATION:
TRADEMARK
Style
10 = CMF-RL10
RL = Telecom Radial Leaded CPTC
25 = CMF-RL25
BI-WEEKLY
25U = CMF-RL25U
506G Rated Resistance (RN)
DATE CODE:
35 = CMF-RL35
10-55 (10 Ohms - 55 Ohms)
WEEK 13-14 = G
50 = CMF-RL50
Uncoated Option
55 = CMF-RL55
YEAR CODE:
10K = CMF-RL10-10 U = Uncoated Part Blank = Standard Part
6 = 2006
35K = CMF-RL35-10
Size Option
50K = CMF-RL50-10
A = Reduced Size Blank = Standard Size
55K = CMF-RL55-10
35A = CMF-RL35A NOTE:
Rated Resistance Tolerance
50A = CMF-RL50A UNCOATED PARTS ARE UNMARKED.
-10 = 10 % Blank = 20 % (Standard)
55A = CMF-RL55A
Packaging Options
35AK = CMF-RL35A-10
- 0 = Bulk Packaging - Plastic Tray
50AK = CMF-RL50A-10
55AK = CMF-RL55A-10
Alternative tolerances, resistances and lead lengths available on request.
Product Dimensions
A B C D E F Characteristics
Model
Max. Max. Max. Nom. Nom. Nom. Material Style
9.5 4.5 13.5 3.5 0.6 0.05 5.0 0.2
CMF-RL10 Sn/Cu 1
(0.374) (0.177) (0.531) (0.138) (0.024 0.002) (0.197 0.008)
9.8 5.0 13.5 3.0 - 3.5 0.6 0.05 5.0 0.3
CMF-RL25 Sn/Cu 1
(0.386) (0.197) (0.531) (0.118 - 0.138) (0.024 0.002) (0.197 0.012)
5.2 3.5 5.2 3.8 0.6 0.05 5.0 0.2
CMF-RL25U Sn/Cu 2
(0.205) (0.138) (0.205) (0.150) (0.024 0.002) (0.197 0.008)
9.8 5.0 13.5 3.0 - 3.5 0.6 0.05 5.08 0.3
CMF-RL35 Sn/Cu 1
(0.386) (0.197) (0.531) (0.118 - 0.138) (0.024 0.002) (0.200 0.012)
7.5 5.6 13.0 3.5 0.6 0.05 5.0 0.2
CMF-RL35A Sn/Cu 1
(0.295) (0.220) (0.512) (0.138) (0.024 0.002) (0.197 0.008)
9.8 5.0 13.5 3.0 - 3.5 0.6 0.05 5.08 0.3
CMF-RL50 Sn/Cu 1
(0.386) (0.197) (0.531) (0.118 - 0.138) (0.024 0.002) (0.200 0.012)
7.5 5.6 13.0 3.5 0.6 0.05 5.0 0.2
CMF-RL50A Sn/Cu 1
(0.295) (0.220) (0.512) (0.138) (0.024 0.002) (0.197 0.008)
9.8 5.0 13.5 3.0 - 3.5 0.6 0.05 5.08 0.3
CMF-RL55 Sn/Cu 1
(0.386) (0.197) (0.531) (0.118 - 0.138) (0.024 0.002) (0.200 0.012)
7.5 5.6 13.0 3.5 0.6 0.05 5.0 0.2
CMF-RL55A Sn/Cu 1
(0.295) (0.220) (0.512) (0.138) (0.024 0.002) (0.197 0.008)
Packaging:
MM
DIMENSIONS:
BULK: CMF-RL25U & CMF-RL50A = 700 pcs. per bag; all other models = 600 pcs. per tray. (INCHES)
Style 1 Style 2 Style 3
A B A
B A
B
C
C
C
D
D
E
D E
E
F
F
F
CMF-RL SERIES, REV. U, 06/18
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this www.bourns.com/docs/legal/disclaimer.pdfdocument, and at .