*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.
CMF-RQ Series - Telecom CPTC Resettable Fuses
Time
Induction Rated Resistance to Trip
Voltage Rated Resistance Matching Hold Hold Trip Imax @ @ Imax/
Model Withstand Voltage (RN) In Housing Current Current Current 230 VAC 230 VAC
Amps Amps Amps
VAC Volts Ohms Tolerance Ohms @ 25 °C @ 40 °C @ 25 °C Amps Seconds
CMF-RQ50 600 230 50 ±20 % ± 0.5 0.09 0.06 0.19 3.0 < 0.1
CMF-RQ50-10 600 230 50 ±10 % ± 0.5 0.09 0.06 0.19 3.0 < 0.1
Electrical Characteristics
Features
■ Four 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*
Applications
Used as a secondary overcurrent protection
device in:
■ Customer Premise Equipment (CPE)
■ Central Office (CO)
■ Access equipment
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 %
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.
Test Procedures And Requirements For Model CMF-RQ Series
