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  features n formerly a product n miniature thermal cutoff (tco) device n high current capacity, low impedance n overtemperature and overcurrent protection for lithium polymer and prismatic cells n controls abnormal, excessive current virtually instantaneously, up to rated limits n wide range of temperature options applications battery cell protection for: n notebook pcs n tablet pcs n smart phones aa series breaker (thermal cutoff device) * rohs directive 2002/95/ec jan. 27, 2003 including annex and rohs recast 2011/65/eu june 8, 2011. ** bourns considers a product to be halogen free if (a) the bromine (br) content is 900 ppm or less; (b) the chlorine (cl) content is 900 ppm or less; and (c) the total bromine (br) and chlorine (cl) content is 1500 ppm or less. specifcations are subject to change without notice. the device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. users should verify actual device performance in their specifc applications. *rohs compliant lead free *rohs compliant & **halogen free lead free versions are rohs compliant* ratings specifcation aa72ab0 aa77ab0 aa82ab0 aa85ab0 trip temperature 72 c 5 c 77 c 5 c 82 c 5 c 85 c 5 c reset temperature 40 c min. contact rating dc9 v / 35 a, 1000 cycles maximum breaking current dc5 v / 60 a, 100 cycles maximum voltage dc28 v / 35 a, 100 cycles maximum leakage current 200 ma max. @ 25 c resistance 2 milliohms max. agency recognition product dimensions description ul, cul file number: e215638 (ul 60730) tuv file number: r50350207 (en 60730-2-9) dimensions: mm (inches) how to order aa 77 a b 0 series designator trip temperature (5 c) ? 72 ? 77 ? 82 ? 85 arm material a = cu alloy high current type terminal type 1 = with projection b = without projection manufacturers internal code 1.22 0.05 (.048 .002) 0.2 0.01 (.008 .0004) 0.2 0.01 (.008 .0004) 0.37 0.1 (.015 .004) 0.37 0.1 (.015 .004) 0.1 (.004) 4 plcs. 0.5 (.004) dia. 4 plcs. ref. 6.95 0.1 (.274 .004) no object 2.7 0.1 (.106 .004) 2.7 0.1 (.106 .004) 0.2 (.008) max. 2.5 0.1 (.098 .004) 0.7 0.1 (.028 .004) 2.5 0.1 (.098 .004) 3.75 0.1 (.148 .004) 3.95 (.156) max. 0.7 0.1 (.028 .004) 1.8 0.1 (.071 .004) ref. 2.65 0.1 (.104 .004) ref. 0.15 (.006) r ? 5 1 21 6 m a a 8 5 a b 0 0 0
specifcations are subject to change without notice. the device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. users should verify actual device performance in their specifc applications. aa series breaker (thermal cutoff device) typical performance the above curves were derived from placing test samples in an oven at 25 , 40 , 60 and 70, increasing current fow through the sample at a rate of 0.1 a/minute and recording the current value when the sample trips. current vs. temperature curves product structure arm terminal cover plate cover base available with and without projections. projection base terminal projection bimetal disc arm ptc contact circuit diagram normal circuit circuit after opening temperature (c) current (a) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 20 30 40 50 60 70 80 aa72ab0y (low 67 c average
aa77ab0y (low 72 c average
aa82ab0y (low 77 c average
aa85ab0y (low 80 c average

specifcations are subject to change without notice. the device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. users should verify actual device performance in their specifc applications. aa series breaker (thermal cutoff device) asia-pacifc: tel: +886-2 2562-4117 ? email: asiacus@bourns.com emea: tel: +36 88 520 390 ? email: eurocus@bourns.com the americas: tel: +1-951 781-5500 ? email: americus@bourns.com www.bourns.com typical part marking wiring recommendations this is not a surface mount device for reow soldering. therefore ni ta wiring should e accomplished y either resistance or laser welding. solder connections should e avoided. standard packaging specifcations plastic bag ....................................................................................................................................................................... sfvh ,hur ......................................................................................................................................................................... sfvh outer box .................................................................................................................................... 30,000 pcs. max. (up to 10 inner boxes) x2715a aa77a10 02 date code: month (1~9, x, y, z) date year machine no. roman numeral ( i, ii, iii, etc .) or arabic numeral ( 1, 2, 3, etc. ) = okayama factory alphabet = shiga factory manufacturers trademark special specifications code terminal type manufacturers internal code (alphanumeric character) arm material (a = cu alloy) trip temperature - c (72, 77, 82, 85) series designator application temperature range ........................................... -30 ~ 100 c storage conditions 1) 7heuhdnhupvwehvwruhlwhrulldosdfndlsodvwlfedrufduwrlw whroorlfrlwlrvdpelhwwhpshudwuhrwr5lwr udlfdowhpshudwuhfdhluhfwvvlhhfhvvlhleudwlrruvrfn 2) rl vwrudhorfdwlrvhuhwhuhlvdsrvvlelolwrhhudwlfruurvlhdv vfdvurpvdoweuhhhforulhurhvohdpprlpvohrldwlr urh forulhdfhwdwhhwf 6wrudhshulrvroehrorhuwdprwvurpdwhrvlsphw
specifcations are subject to change without notice. the device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. users should verify actual device performance in their specifc applications. aa series breaker (thermal cutoff device) caution when using breaker before using the breaker, please fully read the design and handling cautions stated below to avoid breaker performance deterioration and/or damage to the breaker body or terminal. design cautions 1. use within the electrical ratings specifed in this data sheet. if used over the rating of voltage or current, on-off life might be impacted and contact may deteriorate due to breaker arm damage. 2. if used over the electrical rating, the circuit may not open safely or operate properly. please test your device for any abnormalities and confrm that the breaker will open the circuit safely in your device. 3. mount the breaker on your device where heat is the highest in order to transfer it effectively to the breaker. 4. if the breaker is affxed with an adhesive (resin, etc.), fully test, evaluate and verify that the adhesive presents no negative effects on the breaker before proceeding. 5. after the breaker is mounted, affx it so that the breaker body and terminals will not move. if not affxed properly, breaker resistance could increase or contact could open due to stress during handling or vibration/shock during transportation. 6. mount the breaker body and terminals in a straight and fat direction. if the body and terminals are mounted in a twisted condition, breaker resistance could increase or create body damage. 7. if breaker is to be resin-molded, test and evaluate the application to determine whether the breaker can be used effectively. 8. the breaker cannot be used as a repetitive on-off thermostat. 9. the breaker is not washable. do not wash. 10. the breaker is not designed or warranted for fow, refow or hand-soldering applications. if such application is required, you will need to evaluate whether the breaker is suitable for your specifc application. 11. when mounting and after mounting the breaker, do not apply supersonic vibration. vibration and heat may cause breaker resistance to increase or may cause body damage. if you plan to apply supersonic vibration after mounting the breaker, you will need to evaluate whether the breaker is suitable for your specifc application. the breaker is not designed or warranted to withstand supersonic vibration. 12. do not use the breaker in the following environments: a) water, oil, chemicals or organic solutions b) direct sunlight, outdoor exposure, dust c) dew condensation, allowing the breaker to get wet d) salt breeze, chlorine, hydrogen sulfde, ammonium, sulfde-oxidation, hydrogen chloride, and anywhere there is a possibility of generating corrosive gas such as sulfurous acid gas e) strong static electric charge or electromagnetic wave 13. the breaker is not designed or tested for, and should not be used in, aerospace, airplane, nuclear, military, life-sustaining medical and other related applications.
11/16 specifcations are subject to change without notice. the device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. users should verify actual device performance in their specifc applications. aa series breaker (thermal cutoff device) caution when using breaker (continued) handling cautions 1. since the breaker body is composed of plastic parts, do not clamp or dent with tools as this could cause a resistance increase or body damage. 2. breaker terminals are thin copper-alloy with right angle edges. handle carefully to avoid injury to fngers. handling while wearing fnger cots and using tweezers is recommended. 3. when welding breaker terminals or mounting the breaker on a cell or pcm board, be careful to avoid placing excessive stress on the breaker body and terminals. excessive stress may cause a resistance increase or body damage. please refer to the following cautions: a) do not apply more than 10 n moment to the breaker body (refer to figure 1) b) do not apply more than 1.5 cn-m twist torque to the breaker body (refer to figure 2) c) do not apply more than 20 n bending force to the breaker body (refer to figure 3) d) do not apply more than 2.0 cn-m twist torque to the breaker terminals (refer to figure 4) e) do not apply more than 2 n force to the breaker terminals (refer to figure 5) f) do not bend terminals more than 45 at root (refer to figure 6) g) do not twist terminals more than 10 with the breaker body affxed. 4. in breaker body welding, normally there is direct welding (figure 7) and series welding (figure 8). in either case, use a suitable jig so that stress will not exceed the limits stated above. 5. pull-and-detach strength of the terminal welding should be to your own specifcation. if the welding result is controlled by resistance, measurement should be made at a close point to the breaker body by dc 4-point clip method using a milliohm meter to ensure accuracy (refer to figure 9). 6. avoid putting excessive stress as shown above in 3-a) to 3-g) when the jig is used for welding/additional processing. 7. confrm the resistance value after each time an additional process is applied. rod a rod b rod a figure 1 figure 2 figure 9 figure 3 figure 4 figure 5 figure 6 figure 7 figure 8 rod b 45 45 45 45 milliohm meter due to possible updates to safety standards and other reasons, there may be changes in specifcations for this data sheet without prior notifcation. therefore, before design-in for your application, please contact us for the most up-to-date specifcations.


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