z302 bv 20088 vishay draloric www.vishay.com 98 document number 21020 revision 17-feb-05 for technical questions, contact ww1resistors@vishay .com features can operate as both a normal resistor and as a fuse . fuses when overloaded by more than 100 times the rated power ceramic core non flammable cement coating mainly designed to customer requirements ordering information axial cemented, fusible, wirewound resistors z302 15r 5% bv 20088 model resistance value tolerance packaging ? % standard electrical specifications model power standard nominal temperature maximum maximum permissible fusing rating tolerance resistance 1) coefficient peak peak l 2 x t value 3) l 2 x t value 3) p 40 c (max) (typical) (typical) energy 2) power 2) @ 40 c@ 40 c w (max) % ? ppm/ c ws (max) w (max) a 2 s (min) a 2 s (min) z302 bv 20088 3 10 15 100 to 180 1.07 1875 0.07 0.27 5 notes: 1) ambient temperature = 23 c 2) ambient temperature = 40 c 3) ambient temperature = 100 c characteristics of fusible resistors fusible resistors are capable of acting as both a regular resistor and as a fuse when abnormal current comes in. since the two functions are performed by only one component the cost is lower. the z302 bv 20088 fuses when overloaded at more than 100 times the rated power. in line-powered devices, these fusible resistors can be used to act as a fuse when malfunction occurs and line voltage drops across the resistor. to prevent flames or explosion when fusing, the device has an inflammable construction with high dielectric strength. after fu sing the resistance value will be more than 100k ohm to realize sufficient circuit break. the components are mainly designed specif ically to customer requirements. applications for fusible resistors power supplies energy saving lamps battery charges
www.vishay.com 99 z302 bv 20088 vishay draloric document number 21020 revision 17-feb-05 for technical questions, contact ww1resistors@vishay .com dimensions axial cemented wirewound resistors model dimensions in millimeters [inches] abc d min weight (g) z302 bv 20088 13 4.8 0.8 53 1 0.8 [0.512] [0.189] [0.31 [2.087 0.039] typical performance test test results load life, 12,000 hours 3 % ? r vibration 1 % ? r shock 1 % ? r resistance to solering heat 1 % ? r derating 120 100 80 60 40 20 0 -55 50 150 250 350 ambient temperature in c rated power in % temperature rise in c temperature rise 300 200 100 0 0 1 2 3 4 5 z302 power in w 40 a d min b c 10 ? 10 ? 10 ? 10 ? 1 10 100 1000 100 10 1 10000 pulse performance for single square pulses @ 40 c pulse power [w] pulse duration time ti [s] p 40 =3w i imp max = 25 x i 40
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