features superior circuit protection overcurrent and overvoltage protection blocks surges up to rated limits high-speed performance small smt package agency recognition: applications voice / vdsl cards protection modules and dongles process control equipment test and measurement equipment general electronics tbu-ca series - tbu high-speed protectors *rohs directive 2002/95/ec jan 27, 2003 including annex. speci cations are subject to change without notice. customers should verify actual device performance in their speci c applications. general information the tbu-ca series of bourns ? tbu ? products are low capacitance single bidirectional high-speed protection components, constructed using mosfet semiconductor technology, and designed to protect against faults caused by short circuits, ac power cross, induction and lightning surges. the tbu ? high-speed protector placed in the system circuit will monitor the current with the mosfet detection circuit triggering to provide an effective barrier behind which sensitive electronics will not be exposed to large voltages or currents during surge events. the tbu ? device is provided in a surface mount dfn package and meets industry standard requirements such as rohs and pb free solder re? ow pro? les. agency approval description ul file number: e315805 absolute maximum ratings (@ t a = 25 c unless otherwise noted) symbol parameter part number value unit v imp peak impulse voltage withstand with duration less than 10 ms tbu-ca025-xxx-wh tbu-ca040-xxx-wh tbu-ca050-xxx-wh tbu-ca065-xxx-wh tbu-ca085-xxx-wh 250 400 500 650 850 v v rms continuous a.c. rms voltage tbu-ca025-xxx-wh tbu-ca040-xxx-wh tbu-ca050-xxx-wh tbu-ca065-xxx-wh tbu-ca085-xxx-wh 100 200 250 300 425 v t op operating temperature range -40 to +125 c t stg storage temperature range -65 to +150 c t jmax maximum junction temperature +125 c esd hbm esd protection per iec 61000-4-2 2 kv tbu ? device line in/ line out line out/ line in *rohs compliant a5050 e075 asia-paci? c: tel: +886-2 2562-4117 fax: +886-2 2562-4116 europe: tel: +41-41 768 5555 fax: +41-41 768 5510 the americas: tel: +1-951 781-5500 fax: +1-951 781-5700 www.bourns.com
speci cations are subject to change without notice. customers should verify actual device performance in their speci c applications. tbu-ca series - tbu high-speed protectors electrical characteristics (@ t a = 25 c unless otherwise noted) symbol parameter part number min. typ. max. unit i trigger current required for the device to go from operating state to protected state tbu-caxxx-050-wh tbu-caxxx-100-wh tbu-caxxx-200-wh tbu-caxxx-300-wh tbu-caxxx-500-wh 50 100 200 300 500 75 150 300 450 750 100 200 400 600 1000 ma r device series resistance of the tbu device v imp = 250 v i trigger (min.) = 50 ma v imp = 250 v i trigger (min.) = 100 ma v imp = 250 v i trigger (min.) = 200 ma v imp = 250 v i trigger (min.) = 300 ma v imp = 250 v i trigger (min.) = 500 ma v imp = 400 v i trigger (min.) = 50 ma v imp = 400 v i trigger (min.) = 100 ma v imp = 400 v i trigger (min.) = 200 ma v imp = 400 v i trigger (min.) = 300 ma v imp = 400 v i trigger (min.) = 500 ma v imp = 500 v i trigger (min.) = 50 ma v imp = 500 v i trigger (min.) = 100 ma v imp = 500 v i trigger (min.) = 200 ma v imp = 500 v i trigger (min.) = 300 ma v imp = 500 v i trigger (min.) = 500 ma v imp = 650 v i trigger (min.) = 50 ma v imp = 650 v i trigger (min.) = 100 ma v imp = 650 v i trigger (min.) = 200 ma v imp = 650 v i trigger (min.) = 300 ma v imp = 650 v i trigger (min.) = 500 ma v imp = 850 v i trigger (min.) = 50 ma v imp = 850 v i trigger (min.) = 100 ma v imp = 850 v i trigger (min.) = 200 ma v imp = 850 v i trigger (min.) = 300 ma v imp = 850 v i trigger (min.) = 500 ma tbu-ca025-050-wh tbu-ca025-100-wh tbu-ca025-200-wh tbu-ca025-300-wh tbu-ca025-500-wh tbu-ca040-050-wh tbu-ca040-100-wh tbu-ca040-200-wh tbu-ca040-300-wh tbu-ca040-500-wh tbu-ca050-050-wh tbu-ca050-100-wh tbu-ca050-200-wh tbu-ca050-300-wh tbu-ca050-500-wh tbu-ca065-050-wh tbu-ca065-100-wh tbu-ca065-200-wh tbu-ca065-300-wh tbu-ca065-500-wh TBU-CA085-050-WH tbu-ca085-100-wh tbu-ca085-200-wh tbu-ca085-300-wh tbu-ca085-500-wh 13.3 7.1 4.2 3.2 2.6 14.3 8.1 5.2 4.3 3.6 15.7 9.5 6.6 5.6 5.0 17.7 11.5 8.6 7.6 7.0 21.4 15.2 12.3 11.3 10.7 15.3 8.2 4.8 3.8 3.0 16.5 9.4 6.0 5.0 4.2 18.0 10.9 7.5 6.5 5.7 20.3 13.2 9.8 8.8 8.0 24.5 17.4 14.0 13.0 12.2 t block time for the device to go from normal operating state to protected state 1 s i q current through the triggered tbu ? device with 50 vdc circuit voltage 0.25 0.50 1.00 ma v reset voltage below which the triggered tbu ? device will transition to normal operating state 12 16 20 v r th(j-l) junction to package pads - fr4 using recommended pad layout 98 c/w r th(j-l) junction to package pads - fr4 using heat sink on board (6 cm 2 ) (1 in 2 ) 40 c/w
1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 -75 -50 -25 0 25 50 75 100 125 150 junction temperature (?) normalized trigger current 2.2 1.6 1.8 2.0 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 -75 -50 -25 0 25 50 75 100 125 150 junction temperature (?) normalized resistance tbu-ca series - tbu high-speed protectors speci cations are subject to change without notice. customers should verify actual device performance in their speci c applications. reference application the tbu ? devices are general use protectors used in a wide variety of applications. the maximum voltage rating of the tbu ? device should never be exceeded. where necessary, an ovp should be employed to limit the maximum voltage. a cost- effective protection solution combines bourns ? tbu ? protection devices with a pair of bourns ? movs. for bandwidth sensitive applications, a bourns ? gdt may be substituted for the mov. the tbu ? device, constructed using mosfet semiconductor technology, placed in the system circuit will monitor the current with the mosfet detection circuit triggering to provide an effective barrier behind which sensitive electronics are not exposed to large voltages or currents during surge events. the tbu ? device operates in approximately 1 s - once line current exceeds the tbu ? device?s trigger current itrigger. when operated, the tbu ? device restricts line current to less than 1 ma typically. when operated, the tbu ? device will block all voltages including the surge up to rated limits. after the surge, the tbu ? device resets when the voltage across the tbu ? device falls to the v reset level. the tbu ? device will automatically reset on lines which have no dc bias or have dc bias below v reset (such as unpowered signal lines). if the line has a normal dc bias above v reset , the voltage across the tbu ? device may not fall below v reset after the surge. in such cases, special care needs to be taken to ensure that the tbu ? device will reset, with software monitoring as one method used to accomplish this. bourns application engineers can provide further assistance. basic tbu operation performance graphs typical v-i characteristics (tbu-ca050-300-wh) typical trigger current vs. temperature equip. ovp ovp line line tbu tm device tbu tm device line in / line out line out / line in line out / line in line in / line out typical resistance vs. temperature power derating curve current (100 ma/div) voltage (5 v/div) i trip v reset no additional pcb cu 0.5 sq. in. additional pcb cu ambient temperature (?) 20 3.0 2.5 2.0 1.5 1.0 0.5 0.0 40 60 80 100 120 140 total max. power (w)
speci cations are subject to change without notice. customers should verify actual device performance in their speci c applications. tbu-ca series - tbu high-speed protectors product dimensions dimensions: mm (inches) recommended pad layout tbu ? high-speed protectors have a 100 % matte-tin termination ? nish. for improved thermal dissipation, the recommended layout uses pcb copper areas which extend beyond the exposed solder pad. the exposed solder pads should be de? ned by a solder mask which matches the pad layout of the tbu ? device in size and spacing. it is recommended that they should be the same dimen- sion as the tbu ? pads but if smaller solder pads are used, they should be centered on the tbu ? package terminal pads and not more than 0.10-0.12 mm (0.004-0.005 in.) smaller in overall width or length. solder pad areas should not be larger than the tbu ? pad sizes to ensure adequate clearance is maintained. the recom- mended stencil thickness is 0.10-0.12 mm (0.004-0.005 in.) with a stencil opening size 0.025 mm (0.0010 in.) less than the solder pad size. extended copper areas beyond the solder pad signi? cantly improve the junction to ambient thermal resistance, resulting in operation at lower junction temperatures with a corresponding bene? t of reliability. all pads should soldered to the pcb, includ- ing pads marked as nc or nu but no electrical connection should be made to these pads. for minimum parasitic capacitance, it is recommended that signal, ground or power signals are not routed beneath any pad. pin 1 & backside chamfer 4.00 ?0.10 (.157 ?.004) 0.00 - 0.05 (.000 - .002) 6.50 ?0.10 (.256 ?.004) 0.85 ?0.05 (.033 ?.002) 0.30 (.012) 3.40 (.134) 0.30 (.012) 1.85 (.073) 0.70 (.028) 0.70 (.028) 0.80 (.031) 1.85 (.073) c pin 1 0.25 (.010) 3 2 1 pad # pin out 1 line in/out 2 nu 3 line out/in pad designation dark grey areas show added pcb copper area for better thermal resistance.
speci cations are subject to change without notice. customers should verify actual device performance in their speci c applications. tbu-ca series - tbu high-speed protectors re ow pro le pro le feature pb-free assembly average ramp-up rate (tsmax to tp) 3 c/sec. max. preheat - temperature min. (tsmin) - temperature max. (tsmax) - time (tsmin to tsmax) 150 c 200 c 60-180 sec. time maintained above: - temperature (tl) - time (tl) 217 c 60-150 sec. peak/classi? cation temperature (tp) 260 c time within 5 c of actual peak temp. (tp) 20-40 sec. ramp-down rate 6 c/sec. max. time 25 c to peak temperature 8 min. max. how to order tbu - ca 085 - 500 - wh tbu ? product series ca = bi-series impulse voltage rating 025 = 250 v 040 = 400 v 050 = 500 v 065 = 650 v 085 = 850 v trigger current 050 = 50 ma 100 = 100 ma 200 = 200 ma 300 = 300 ma 500 = 500 ma hold to trip ratio suf? x w = hold to trip ratio package suf? x h = dfn package typical part marking pin 1 manufacturing date code - 1st digit indicates the year? 6-month period. - 2nd digit indicates the week number in the 6-month period. - 3rd & 4th digits indicate specific lot for the week. 6-month period codes: a = jan-jun 2009 c = jan-jun 2010 e = jan-jun 2011 b = jul-dec 2009 d = jul-dec 2010 f = jul-dec 2011 manufacturer? trademark product code - 1st digit indicates product family: a = tbu-ca series - 2nd & 3rd digits indicate impulse voltage: 25 = 250 v 40 = 400 v 50 = 500 v 65 = 650 v 85 = 850 v - 4th & 5th digits indicate trigger current: 05 = 50 ma 10 = 100 ma 20 = 200 ma 30 = 300 ma 50 = 500 ma thermal resistance vs additional pcb cu area added cu area (sq. in.) 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 120 100 80 60 40 20 0 thermal resistance (?/w)
speci cations are subject to change without notice. customers should verify actual device performance in their speci c applications. tbu-ca series - tbu high-speed protectors ?bu?is a registered trademark of bourns, inc. in the u.s., taiwan and european community. rev. 07/11 packaging speci cations b a d c n f g (measured at hub) user direction of feed k 0 b 0 p 2 d 1 center lines of cavity embossment t d p 0 top cover tape e w p a 0 dimensions: mm (inches) a b c d g n min. max. min. max. min. max. min. max. ref. ref. 326 (12.835) 330 (13.002) 1.5 (.059) 2.5 (.098) 12.8 (.504) 13.5 (.531) 20.2 (.795) - 16.5 (.650) 102 (4.016) a 0 b 0 d d 1 e f min. max. min. max. min. max. min. max. min. max. min. max. 4.3 (.169) 4.5 (.177) 6.7 (.264) 6.9 (.272) 1.5 (.059) 1.6 (.063) 1.5 (.059) - 1.65 (.065) 1.85 (.073) 7.4 (.291) 7.6 (.299) k 0 p p 0 p 2 t w min. max. min. max. min. max. min. max. min. max. min. max. 1.0 (.039) 1.2 (.047) 7.9 (.311) 8.1 (.319) 3.9 (.159) 4.1 (.161) 1.9 (.075) 2.1 (.083) 0.25 (.010) 0.35 (.014) 15.7 (.618) 16.3 (.642) quantity: 3000 pieces per reel
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