63 communication bus varistor the can bus and flexray varistor is a zinc oxide (zno) based ceramic semiconductor device with non- linear voltage-current characteristics (bi-directional) similar to back-to-back zener diodes and an emc capacitor in parallel (see equivalent circuit model). they have the added advantage of greater current and energy handling capabilities as well as emi/rfi attenuation. devices are fabricated by a ceramic sintering process that yields a structure of conductive zno grains surrounded by electrically insulating barriers, creating varistor like behavior. how to order can style can = can bus flx = flexray 0001 case size 0001 = 0603 discrete 0002 = 0405 2-element 0004 = 0612 4-element 0005 = 0402 discrete p termination p = ni/sn alloy (plated) d packaging code (reel size) d = 7" reel (1,000 pcs.) r = 7" reel (4,000 pcs.) t = 13" reel (10,000 pcs.) w = 7" reel (10,000 pcs.) 0402 and 0201 only general description performance characteristics avx part no. v w (dc) v w (ac) v b i l e t i p cap. case size elements can0001_ _ 18 14 120 2 0.015 4 22 0603 1 can0002_ _ 18 14 70 2 0.015 4 22 0405 2 can0004_ _ 18 14 100 2 0.015 4 22 0612 4 can0005_ _ 18 14 33 2 0.015 4 37 0402 1 flx0005_ _ 18 14 26 5 0.020 4 17 0402 1 termination finish code packaging code v w (dc) dc working voltage (v) v w (ac) ac working voltage (v) v b typical breakdown voltage (v @ 1ma dc ) v c clamping voltage (v @ i vc ) i vc test current for v c (a, 8x20s) i l maximum leakage current at the working voltage (a) e t transient energy rating (j, 10x1000s) i p peak current rating (a, 8x20s) cap maximum capacitance (pf) @ 1 mhz and 0.5vrms temp range -55oc to +125oc lead-free compatible component equivalent circuit model discrete mlv model pcb trace to device requiring protection r v c r p r on l p solder pad where: r v = voltage variable resistance (per vi curve) r p 10 12 c = defined by voltage rating and energy level r on = turn on resistance l p = parallel body inductance 0 1 10 100 1000 10000 frequency (mhz) 10.0 0.0 -10.0 -20.0 -30.0 -40.0 -50.0 insertion loss (db) can0001 can0005 flx0005 10000 1000 100 10 10 100 1000 10000 pulse duration ( s) peak power (w) typical pulse rating curve
communication bus varistor solder pad dimensions mm (inches) 0402 discrete 0603 discrete 0405 array 0612 array length 1.00 0.10 (0.040 0.004) 1.60 0.15 (0.063 0.006) 1.00 0.15 (0.039 0.006) 1.60 0.20 (0.063 0.008) width 0.50 0.10 (0.020 0.004) 0.80 0.15 (0.032 0.006) 1.37 0.15 (0.054 0.006) 3.20 0.20 (0.126 0.008) thickness 0.60 max. (0.024 max.) 0.90 max. (0.035 max.) 0.66 max. (0.026 max.) 1.22 max. (0.048 max.) term band width 0.25 0.15 (0.010 0.006) 0.35 0.15 (0.014 0.006) 0.36 0.10 (0.014 0.004) 0.41 0.10 (0.016 0.010) a b c d e c a b a b 0405 array 0402/0603 discrete 0612 array a b c d e abcde 0402 discrete 0.61 0.51 1.70 CC (0.024) (0.020) (0.067) 0603 discrete 0.89 0.76 2.54 CC (0.035) (0.030) (0.100) 0405 array 0.46 0.74 0.12 0.38 0.64 (0.018) (0.029) (0047) (0.015) (0.025) 0612 array 0.89 1.65 2.54 0.46 0.76 (0.035) (0.065) (0.100) (0.018) (0.030) physical dimensions mm (inches) 64 application avx can bus and flexray varistors offer significant advantages in general areas of a typical can or flexray network as shown on the right. some of the advantages over diodes include: ? space savings ? higher esd capability @ 25kv contact ? higher in rush current (4a) 8 x 20s ? fit rate 0.1 failures (per billion hours) flexray tm can powertrain body control module/can gateway instrument cluster smart junction box dash board node hvac door module wheel node wheel node wheel node wheel node x-by-wire master 0402, 0603 0405 0612 discrete array array
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