TeleLink Fuse TeleLink Fuse The TeleLink Surface Mount (SM) surge resistant fuse offers circuit protection without requiring a series resistor. When used in conjunction with the SIDACtor Transient Voltage Suppressor (TVS), the TeleLink SM fuse and the SIDACtor TVS provide a complete regulatory-compliant solution for standards such as GR 1089, TIA/EIA-IS-968, UL 60950, and ITU K.20 and K.21 (formerly known as FCC Part 68). No series resistor is required for the F1250T and F1251T to comply with these standards. Contact factory for enhanced K.20 and K.21 details. Surge Ratings TeleLink SM Fuse IPP 2x10 s Amps IPP 10x160 s Amps IPP 10x560 s Amps IPP 10x1000 s Amps F0500T not rated 75 45 35 F1250T 500 160 115 100 F1251T 500 160 115 100 Interrupting Values TeleLink SM Fuse Voltage Rating Current Rating I2t Measured at DC Rated Voltage Voltage, Current MIN TYP MAX F0500T 250 V 500 mA 1.3 A2s 600 V, 40 A 1 ms 2 ms 60 ms F1250T 250 V 1.25 A 22.2 A2s 600 V, 60 A * 1 ms 2 ms 60 ms F1251T 250 V 2A 30 A2s 600 V, 60 A * 1 ms 2 ms 60 ms Interrupting Rating * Interrupt test characterized at 50 to 70 phase angle. Phase angles approximating 90 may result in damage to the body of the fuse. Notes: * The TeleLink SM fuse is designed to carry 100% of its rated current for four hours and 250% of its rated current for one second minimum and 120 seconds maximum. Typical time is four to 10 seconds. For optimal performance, an operating current of 80% or less is recommended. * I2t is a non-repetitive RMS surge current rating for a period of 16.7 ms. Resistance Ratings DC Cold Resistance TeleLink SM Fuse Typical Voltage Drop @ Rated Current MIN MAX F0500T 0.471 V 0.420 0.640 F1250T 0.205 V 0.107 0.150 F1251T 0.110 V 0.050 0.100 Notes: * Typical inductance 4 H up to 500 MHz. * Resistance changes 0.5% for every C. * Resistance is measured at 10% rated current. http://www.teccor.com +1 972-580-7777 2 - 66 (c) 2002 Teccor Electronics SIDACtor(R) Data Book and Design Guide TeleLink Fuse Qualification Data The F1250T and F1251T meet the following test conditions per GR 1089 without additional series resistance. However, in-circuit test verification is required. Note that considerable heating may occur during Test 4 of the Second Level AC Power Fault Test. Surge Voltage Volts Wave-form s Surge Current Amps Repetitions Each Polarity 1 600 10x1000 100 25 2 1000 10x360 100 25 3 1000 10x1000 100 25 4 2500 2x10 500 10 5 1000 10x360 25 5 Test Second Level Lightning Surge Test Test Surge Voltage Volts Wave-form s Surge Current Amps Repetitions Each Polarity 1 5000 2x10 500 1 First Level AC Power Fault Test Test Applied Voltage, 60 Hz VRMS Short Circuit Current Amps 1 50 0.33 15 min 2 100 0.17 15 min 3 200, 400, 600 1 at 600 V 60 applications, 1 s each 4 1000 1 60 applications, 1 s each Duration 5 * * 60 applications, 5 s each 6 600 0.5 30 s each 7 600 2.2 2 s each 8 600 3 1 s each 9 1000 5 0.5 s each * Test 5 simulates a high impedance induction fault. For specific information, please contact Teccor Electronics. Second Level AC Power Fault Test for Non-Customer Premises Equipment Test Applied Voltage, 60 Hz VRMS Short Circuit Current Amps Duration 1 120, 277 30 30 min 2 600 60 5s 3 600 7 5s 4 100-600 2.2 at 600 V 30 min Notes: * Power fault tests equal or exceed the requirements of UL 60950 3rd edition. * Test 4 is intended to produce a maximum heating effect. Temperature readings can exceed 150 C. * Test 2 may be dependent on the closing angle of the voltage source. Fuse is characterized at 50 to 70. Closing angles approximating 90 may result in damage to the body of the fuse. * Use caution when routing internal traces adjacent to the F1250T and F1251T. (c) 2002 Teccor Electronics SIDACtor(R) Data Book and Design Guide 2 - 67 http://www.teccor.com +1 972-580-7777 Data Sheets First Level Lightning Surge Test TeleLink Fuse 1000 800 700 600 500 400 300 200 100 90 80 70 60 50 40 30 20 Time in seconds F0500T F1250T F1251T 10 9 8 7 6 5 4 3 2 1 .9 .8 .7 .6 .5 .4 .3 .2 .1 .09 .08 .07 .06 .05 .04 .03 .02 .01 .1 .2 .3 .4 .5 .6 .7 .8 .9 1 2 3 4 5 6 7 8 9 10 20 30 40 50 60 70 80 90 100 Current in Amperes Time Current Curve http://www.teccor.com +1 972-580-7777 2 - 68 (c) 2002 Teccor Electronics SIDACtor(R) Data Book and Design Guide TeleLink Fuse Temperature Derating Curve Operating temperature is -55 C to +125 C with proper correction factor applied. 150 140 130 Data Sheets Percent of Rating 120 110 100 90 80 70 60 Effect on Current Rating 50 40 30 -55 -60 -40 -20 0 20 40 60 80 100 125 Ambient C Chart of Correction Factor Maximum Temperature Rise TeleLink Fuse Temperature Reading F0500T 75 C (167 F) * F1250T 75 C (167 F) * F1251T 75 C (167 F) * * Higher currents and PCB layout designs can affect this parameter. Notes: * Readings are measured at rated current after temperature stabilizes * The F1250T meets the requirements of UL 248-14. However, board layout, board trace widths, and ambient temperature values can cause higher than expected rises in temperature. During UL testing, the typical recorded heat rise for the F1250T at 2.2 A was 120 C. Package Symbolization Marking F0500T FU F FT F F1250T F1251T Manufactured in Taiwan U T JU J JT J U T NU N NT N (c) 2002 Teccor Electronics SIDACtor(R) Data Book and Design Guide Manufactured in USA 2 - 69 U T http://www.teccor.com +1 972-580-7777