the ft600 fuse series is designed to assist telecommunications equipment manufacturers in complying with north american overcurrent protection requirements, including telcordia gr- 1089, tia-968-a (formerly fcc part 68), and ul60950 3rd edition. the low profile and small footprint of the ft600 fuse provide a reliable, non-resettable overcurrent protection solution. the device offers low temperature-rise performance under sneak current fault events to prevent damage to circuit traces or multilayer boards. when used in conjunction with sibar thyristor devices, it provides designers with a complete overcurrent/overvoltage protection solution to help them comply with regulatory standards. this fuse offering complements the telecom resettable polyswitch device series for use in applications where intervention is desired after an overcurrent fault. benefits high density placement in multi-port system designs improved temperature rise performance over other similar smt fuse devices under sneak-current testing the ft600 in conjunction with a sibar overvoltage protection device, assists designers in meeting regulatory standards with no additional series components features low profile and small footprint the lightning robust surface-mount fuse offers overcurrent protection in case of power fault events enables the design of equipment complying with applicable telecom specifications including ul60950, tia-968-a (formerly fcc part 68), and telcordia gr-1089 low resistance applications adsl, adsl2, adsl2plus, shdsl, vdsl linecards and modems t1/e1 systems twisted-pair telecom ports requiring telcordia gr-1089, ul60950 and fcc part tia-968-a (formerly fcc part 68) compliance telecom fuses 85 12
key device selection citeria faster cooler surface sibar thyristor application specification time-to-open temperature surge protectors* customer premises equipment, it equipment ul 60950 ft600-0500 ft600-2000 tvbxxxsc-l analog modems, v.90 modems, tia-968-a ft600-1250 isdn modems, xdsl modems, adsl splitters, phone sets, fax machines, answering machines, caller id, internet appliances, pbx systems, pos terminals, wall plugs access network equipment telcordia gr-1089 ft600-1250 ft600-2000 tvbxxxsc-l remote terminals, line repeaters, multiplexers, tia-968-a cross-connects, wan equipment central office switching equipment telcordia gr-1089 ft600-1250 ft600-2000 tvbxxxsc-l analog/pots linecards, isdn linecards, xdsl modems, tia-968-a adsl/vdsl splitters, t1/e1 linecards, multiplexers, csu/dsu, servers notes: this list is not exhaustive. raychem circuit protection welcomes our customers?input for additional application ideas for ove rcurrent protection of telecom applications. * for more information on raychem circuit protection sibar thyristor surge protectors. to use this guide, follow the steps below: 1. select your equipment type from the guide below. 2. use the key device selection criteria (time-to-open, surface temperature) to determine best suitability for your application. 3. use agency specification / selection guide on the next page to select a specific part number for each application based on t he agency requirements. figure ft1 - thermal derating curve (normalized) for ft600 devices 70 80 90 100 110 120 130 -70 -50 -30 -10 10 30 50 70 90 110 130 % of current rating ambient temperature c protection application guide for telecommunications and networking devices family product lightning power cross ft600 ft600-0500 tia-968-a (formerly fcc part 68) - type a & b ul60950, 3rd ed. ?600vac, 40a ft600-1250 telcordia gr-1089 ?level 1 and 2 telcordia gr-1089 ?600 vac, 40a ft600-2000 tia-968-a ul60950 use the guide below to select ft600 devices appropriate for use in your application. the following pages contain specifications for part numbers recommended below. ft600 devices enable telecommunication equipment to meet the applicable protection requirements of these ind ustry specifications. refer to individual agency specifications for test procedures and circuit schematics. users should independentl y evaluate the suitability of, and test each product for their application. note: ft600-1250 and ft600-2000 are designed to assist equipment in complying with telcordia gr-1089 specifications. in-circuit testing is strongly recommended. the ft600-0500, ft600-1250 and ft600-2000 are designed to meet the ul60950 power cross and fcc tia-968-a 68 lightning surge req uirements. note that type a tests allow for an overcurrent protection component to fuse open during the surge. agency specification/selection guide for ft600 devices part ampere rating voltage rating typical resistance typical i 2 t number ( a )( v )( )( a 2 s ) * ft600-0500 0.50 250 0.5 1 ft600-1250 1.25 250 0.1 16 ft600-2000 2.00 250 0.05 18 the ft600-xxxx devices are designed to carry 100% of rated current for 4 hours minimum and 250% of rated current for 1 second m inimum, 120 seconds maximum. resistance measured at 10% of rated current. *i 2 t is calculated at 10 ms or less. interrupt voltage and current ratings for ft600 devices telecom fuses 12 86
b a c figure ft2 - product dimensions figure ft2 - dimension figures for ft600 devices dimension abc part number min. max. min. max. min. max. figure ft600-0500 10.5 3.4 3.4 ft2 (0.413) (0.133) (0.133) ft600-1250 10.5 3.4 3.4 ft2 (0.413) (0.133) (0.133) ft600-2000 10.5 3.4 3.4 ft2 (0.413) (0.133) (0.133) table ft1 - dimensions for ft600 devices in millimeters (inches) figure ft3 - typical time-to-open characteristics (at 20 c) for ft600 devices ft600 a = ft600-0500 b = ft600-1250 c = ft600-2000 figure ft3 time in seconds current in amperes 87 12 0.1 0.001 0.01 0.1 1 10 100 1 10 100 1000 a b c .500a 1.25a 2a
table ft2 - physical characteristics and environmental specifications for ft600 devices* part number bag quantity tape & reel quantity standard package part marking agency recognition ft600-0500-2 2,500 10,000 500 ul, csa FT600-1250-2 2,500 10,000 1250 ul, csa ft600-2000-2 2,500 10,000 2000 ul, csa notes: the -2 designates tape and reel, the package style for this product. preheating 50 100 150 200 250 300 0 10 to 20 temperature ( c) soldering cooling 120 30 to 90 time(s) solder reflow: recommended reflow methods: ir, vapor phase oven, hot air oven devices can be cleaned using standard industry methods and solvents rework: ?if a device is removed from the board, it should be discarded and replaced by a new device figure ft5 device a b c d figures for dimensions ft600-0500 12.6 4.0 3.7 5.2 4 (0.496) (0.157) (0.145) 0.204 ft600-1250 12.6 4.0 3.7 5.2 4 (0.496) (0.157) (0.145) 0.204 ft600-2000 12.6 4.0 3.7 5.2 4 (0.496) (0.157) (0.145) 0.204 a d c b figure ft4 ft600 physical characteristics terminal material silver-plated brass* body material ceramic termination solderability per iec-60127-4 *ft600 devices use high pb content solder for internal construction. they are rohs compliant. environmental specifications test conditions solder heat withstand per mil-std-202, method 210, test condition j solvent resistance per mil-std-202f, method 215j storage temperature -40/+85 c storage humidity per mil-std-202f, method 106f * ft600 devices use high pb content solder for internal construction. they are rohs compliant. table ft3 - packaging and marking information for ft600 devices table ft4 - recommended pad layouts for ft600 devices in millimeters (inches) nominal solder reflow and rework recommendations for ft600 devices telecom fuses 12 88
part numbering system for ft600 devices warning: all information, including illustrations, is believed to be reliable. users, however, should independently evaluate the suitabi lity of each product for their application. tyco electronics corporation makes no warranties as to the accuracy or completeness of the information, and disclaims any liability regarding its use. tyco electronics? only obligations are those in the company?s stand ard terms and conditions of sale for this product, and in no case will tyco electronics be liable for any incidental, indirect, or consequential damages arising from the sale, resale, use, or misuse of the product. specifications are subject to change without notice. in a ddition, tyco electronics reserves the right to make changes without notification to buyer?to materials or processing that do not affect compliance with any applicable specification. packaging -2 :tape & reel ft -1250 -2 600 current in amperes 1250=1.25 0500=0.500 2000=2.00 voltage rating product family 89 12
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