Features
Applications
■ Radial leaded devices
Used as a secondary overcurrent protection
device in:
■ Aids compliance with:
- ITU-T K.20/21/45
- Telcordia GR-1089-CORE
- UL 60950, 3rd Ed.
■ Narrow resistance tolerance
■ Agency recognition:
■ RoHS compliant*
■ Customer Premise Equipment (CPE)
■ Central Office (CO)
■ Access equipment
CMF-RL Series - Telecom CPTC Resettable Fuses
Electrical Characteristics
Rated
Resistance
(RN)
Induction
Voltage
Packaging
Resistance
Matching
Time to Trip
@ Imax / 220
VAC
Rated
Hold
Trip
Imax @
Model
Withstand Voltage
Current
Current
220 VAC
Ohms
Amps
Amps
Amps
Seconds
@ 25 °C
VAC
600
600
600
600
600
600
600
600
600
600
600
600
600
600
600
600
Volts
220
220
220
220
220
220
220
220
220
220
220
220
220
220
220
220
Ohms
Tolerance
20 ꢀ
10 ꢀ
20 ꢀ
20 ꢀ
20 ꢀ
10 ꢀ
10 ꢀ
10 ꢀ
20 ꢀ
10 ꢀ
20 ꢀ
10 ꢀ
20 ꢀ
10 ꢀ
20 ꢀ
10 ꢀ
@ 25 °C
@ 25 °C
@ 25 °C
@ 25 °C
CMF-RL10
10
10
25
25
35
35
35
35
50
50
50
50
55
55
55
55
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.15
0.30
3
3
≤ 0.45
≤ 0.45
≤ 0.3
CMF-RL10-10
CMF-RL25
0.15
0.30
0.100
0.060
0.075
0.075
0.075
0.075
0.065
0.065
0.050
0.050
0.065
0.065
0.050
0.050
0.200
0.150
0.150
0.150
0.150
0.150
0.150
0.150
0.100
0.100
0.150
0.150
0.100
0.100
3
CMF-RL25U
CMF-RL35
0.9
3
≤ 0.25
≤ 0.15
≤ 0.15
≤ 0.15
≤ 0.15
≤ 0.15
≤ 0.15
≤ 0.1
CMF-RL35-10
CMF-RL35A
CMF-RL35A-10
CMF-RL50
3
3
3
3
CMF-RL50-10
CMF-RL50A
CMF-RL50A-10
CMF-RL55
3
3
3
≤ 0.1
3
≤ 0.15
≤ 0.15
≤ 0.1
CMF-RL55-10
CMF-RL55A
CMF-RL55A-10
3
3
3
≤ 0.1
Operating Temperature Range: -40°C to +125 °C
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 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 ꢀ
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 ....... http://www.ul.com/ Follow link to Certifications, then UL File No., enter E307915
How to Order
Typical Part Marking
Represents total content. Layout may vary.
CMF - RL 50 __ A -10 - 0
PART
MANUFACTURER'S
TRADEMARK
Product Designator
IDENTIFICATION:
Style
10 = CMF-RL10
RL = Telecom Radial Leaded CPTC
25 = CMF-RL25
BI-WEEKLY
DATE CODE:
WEEK 13-14 = G
25U = CMF-RL25U
35 = CMF-RL35
Rated Resistance (RN)
506G
10-55 (10 Ohms - 55 Ohms)
50 = CMF-RL50
Uncoated Option
55 = CMF-RL55
YEAR CODE:
6 = 2006
U = Uncoated Part
Blank = Standard Part
Blank = Standard Size
10K = CMF-RL10-10
35K = CMF-RL35-10
50K = CMF-RL50-10
55K = CMF-RL55-10
35A = CMF-RL35A
50A = CMF-RL50A
55A = CMF-RL55A
35AK = CMF-RL35A-10
50AK = CMF-RL50A-10
55AK = CMF-RL55A-10
Size Option
A = Reduced Size
NOTE:
Rated Resistance Tolerance
UNCOATED PARTS ARE UNMARKED.
-10 = 10 ꢀ
Blank = 20 ꢀ (Standard)
Packaging Options
- 0 = Bulk Packaging - Plastic Tray
Alternative tolerances, resistances and lead lengths available on request.
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
Specifications are subject to change without notice.
The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.
Users should verify actual device performance in their specific applications.
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