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features 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 ac 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. users should verify actual device performance in their specifc applications. the products described herein and this document are subject to specifc legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf . *rohs compliant lead free *rohs compliant & **halogen free lead free versions are rohs compliant* ratings specifcation AC72ABD ac77abd ac82abd ac85abd ac90abd trip temperature 72 c 5 c 77 c 5 c 82 c 5 c 85 c 5 c 90 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 minimum holding voltage 3.5 v @ 25 c for 1 minute maximum leakage current 200 ma max. @ 25 c resistance 2 milliohms max. (1 ~ 1.5 milliohms typical) agency recognition product dimensions description ul, cul file number: e215638 vol. 2 (ul 60730) tuv file number: r 50394595 0001 (en 60730-2-9) dimensions: mm (inches) how to order ac 77 a b d series designator trip temperature (5 c) ? 72 ? 77 ? 82 ? 85 ? 90 arm material a = cu alloy high current type terminal type 1 = with projection b = without projection manufacturers internal code d = black body color 0.45 (.018) dia. 4 plcs. ref. 6.95 0.1 (.274 .004) no object 2.7 0.1 (.106 .004) 2.7 0.1 (.106 .004) 0.25 (.010) max. 0.7 0.1 (.028 .004) 2.5 0.1 (.098 .004) 1.2 0.1 (.047 .004) 2.5 0.1 (.098 .004) 3.75 0.1 (.148 .004) 3.95 (.156) max. 0.7 0.1 (.028 .004) 1.6 0.1 (.063 .004) ref. 3.0 0.1 (.118 .004) ref. 0.3 (.012) r 1.10 0.05 (.043 .002) 0.15 0.01 (.006 .0004) 0.15 0.01 (.006 .0004) 0.3 0.1 (.012 .004) 0.3 0.1 (.012 .004) 0.1 (.004) 4 plcs. x 1 7 1 7 k a c 9 0 a b d 0 0 a d a d mini-breaker tcos reset when the following conditions are met: ? the ambient temperature has dropped by 10 c below the minimum trip temperature ? power to the tco has been cycled (off/on) environmental specifcations moisture sensitivity level ......................... 1 esd classifcation (hbm) ....................... 3b
specifcations are subject to change without notice. users should verify actual device performance in their specifc applications. the products described herein and this document are subject to specifc legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf . ac series breaker (thermal cutoff device) typical performance the above curves were derived from placing test samples in an oven at 25 , 40 , 60 and so on, 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 temperature (c) current (a) 0 5 10 15 20 25 30 35 40 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 AC72ABDy (low 67 c average
ac77abdy (low 72 c average
ac82abdy (low 77 c average
ac85abdy (low 80 c average
ac90abdy (low 85 c average
arm terminal cover plate contact cover arm base terminal base available with and without projections. projection bimetal disc ptc projection
specifcations are subject to change without notice. users should verify actual device performance in their specifc applications. the products described herein and this document are subject to specifc legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf . ac 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 circuit diagram normal circuit circuit after opening 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 be avoided. standard packaging specifcations plastic bag ....................................................................................................................................................................... sfvh ,hu%r ......................................................................................................................................................................... sfvh outer box .................................................................................................................................... 30,000 pcs. max. (up to 10 inner boxes) x2717a ac77abd 02 date code: month (1~9, x, y, z) day year machine no. roman numeral ( i, ii, iii, etc .) or arabic numeral ( 1, 2, 3, etc. ) = okayama factory alphabet = shiga factory manufacturers trademark special code (d = black body color) terminal type manufacturers internal code (alphanumeric character) arm material (a = cu alloy) trip temperature - c (72, 77, 82, 85, 90) series designator application temperature range ........................................... -30 ~ 100 c storage conditions 1) the breaker must be stored in the original packaging (plastic bag or carton) with the following conditions: ambient temperature of -10 to +40 c, rh <75 % with no radical temperature change, direct sunshine, excessive vibration or shock. 2) avoid storage locations where there is a possibility of generating corrosive gas vfdvurpvdoweuhhhforulhurhvohdpprlpvohrldwlr hydrogen chloride, acetate, etc. 3) storage period should be no longer than 24 months from date of shipment.
specifcations are subject to change without notice. users should verify actual device performance in their specifc applications. the products described herein and this document are subject to specifc legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf . ac 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 maximum electrical rating specifed in this data sheet, 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.), before proceeding fully test, evaluate and verify that the adhesive presents no negative effects on the breaker. 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 ef fectively. 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, chemical or organic solutions b) direct sunlight, outdoor exposure, dust c) dew condensation, where the breaker could 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.
rev. 06/18 specifcations are subject to change without notice. users should verify actual device performance in their specifc applications. the products described herein and this document are subject to specifc legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf . ac 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 0.6 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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product also can and do vary in diferent applications and actual performance may vary over time. users should always verify the actual performance of the bourns ? product in their specifc devices and applications, and make their own independent judgments regarding the amount of additional test margin to design into their device or application to compensate for diferences between laboratory and real world conditions. unless bourns has explicitly designated an individual bourns ? product as meeting the requirements of a particular industry standard (e.g., iso/ts 16949) or a particular qualifcation (e.g., ul listed or recognized), bourns is not responsible for any failure of an individual bourns ? product to meet the requirements of such industry standard or particular qualifcation. users of bourns ? products are responsible for ensuring compliance with safety-related requirements and standards applicable to their devices or applications. bourns ? products are not recommended, authorized or intended for use in nuclear, lifesaving, life-critical or life-sustaining applications, nor in any other applications where failure or malfunction may result in personal injury, death, or severe property or environmental damage. unless expressly and specifcally approved in writing by two authorized bourns representatives on a case-by-case basis, use of any bourns ? 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products may not, without prior authorization from bourns and/or the u.s. government, be resold, transferred, or re-exported to any party not eligible to receive u.s. commodities, software, and technical data. to the maximum extent permitted by applicable law, bourns disclaims (i) any and all liability for special, punitive, consequential, incidental or indirect damages or lost revenues or lost profts, and (ii) any and all implied warranties, including implied warranties of ftness for particular purpose, non-infringement and merchantability. for your convenience, copies of this legal disclaimer notice with german, spanish, japanese, traditional chinese and simplifed chinese bilingual versions are available at: web page: http://www.bourns.com/legal/disclaimers-terms-and-policies pdf: http://www.bourns.com/docs/legal/disclaimer.pdf c1753 05/17/18

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