AA77AB0

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*oe3<br>sg ye<br>:<br>AA85AB051216M<br>0 0<br>**----- End of picture text -----**<br>


**Features** n Formerly a                                    product™ n Miniature Thermal Cutoff (TCO) device KOMATSULITE 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 

This series is currently available but not recommended for new A designs. The AC Series may be a possible replacement; see ~~oe~~ Product Obsolescence Memo. ~~— OB~~ 

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AA Series Breaker (Thermal Cutoff Device)<br>BOURNS  [i<br>**----- End of picture text -----**<br>


## ~~**Ratings**~~ 

|**Specification**|**AA72AB0**|**AA77AB0**|**AA82AB0**|**AA85AB0**|
|---|---|---|---|---|
|**Specification**<br>TripTemperature|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 BreakingCurrent|DC5 V / 60 A,100 cycles||||
|Maximum Voltage|DC28 V / 35 A,100 cycles||||
|Minimum HoldingVoltage|3.5 V @ 25 °C for 1 minute||||
|Maximum Leakage Current|200 mA max. @ 25 °C||||
|Resistance|2 milliohms max.||||



Mini-breaker TCOs reset when the following conditions are met: 

- The ambient temperature has dropped by 10 °C below the minimum trip temperature, and 

- Power to the TCO has been cycled (off/on) 

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Agency Recognition<br>NO OBJECT Description<br>2.7 ± 0.1 6.95 ± 0.1 File Number: E215638<br>(.106 ± .004) 0.2 (.274 ± .004) (.106 ± .004)2.7 ± 0.1 UL, cUL (UL 60730)<br>(.008)  [MAX.] File Number: R50350207<br>TUV<br>Ee ES (EN 60730-2-9)<br>How to Order<br>AA  77  A  B  0<br>0.7 ± 0.1 0.7 ± 0.1<br>2.5 ± 0.1 (.028 ± .004) (.028 ± .004)2.5 ± 0.1 Series Designator<br>(.098 ± .004) (.098 ± .004) Trip Temperature (±5 °C) • 72<br>i _ 3.75 ± 0.1 i MAX. 3.95 • 77<br>(.148 ± .004) (.156) • 82<br>0.2 ± 0.01 0.2 ± 0.01 • 85<br>(.008 ± .0004) (.008 ± .0004) Arm Material<br>A = Cu Alloy High Current Type<br>Terminal Type<br>0.1 1 = With Projection<br>0.37 ± 0.1 4 PLCS.<br>(.004) B = Without Projection<br>(.015 ± .004)<br>ee 1.22 ± 0.05 (.015 ± .004)0.37 ± 0.1 Manufacturer’s Internal Code<br>(.048 ± .002)<br>0.5<br>REF.<br>(.004)<br>7 DIA. . 5 —<br>4 PLCS.<br>SINE R (.006)0.15 1.8 ± 0.1 2.65 ± 0.1 DIMENSIONS: MM<br>| (.071 ± .004)  — (.104 ± .004) (INCHES) —<br>REF. REF.<br>**----- End of picture text -----**<br>


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Product Dimensions<br>**----- End of picture text -----**<br>


Terminal modifications including bending and extending are available upon request. 

## **WARNING  Cancer and Reproductive Harm -** www.P65Warnings.ca.gov 

- RoHS Directive 2015/863, Mar 31, 2015 and Annex. 

- ** 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. 

- Specifications are subject to change without notice. 

Users should verify actual device performance in their specific applications. 

The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. 

## **Applications** 

Battery cell protection for: 

n Notebook PCs 

n Tablet PCs 

n Smart phones 

## **AA Series Breaker (Thermal Cutoff Device)** 

## ~~**Typical Performance**~~ 

## **Current vs. Temperature Curves** 

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28<br>27<br>26 AA72AB0 (Low 67 °C average)<br>25<br>24 AA77AB0 (Low 72 °C average)<br>23<br>22 AA82AB0 (Low 77 °C average)<br>21<br>20 AA85AB0 (Low 80 °C average)<br>19<br>18<br>17<br>16<br>15<br>14<br>13<br>12<br>11<br>10<br>9<br>8<br>7<br>6<br>5<br>4<br>3<br>2<br>1<br>0<br>20 30 40 50 60 70 80<br>Temperature (°C)<br>Current (A)<br>**----- End of picture text -----**<br>


The above curves were derived from placing test samples in an oven at 25 ℃, 40 ℃, 60 ℃ and 70℃, increasing current flow through the sample at a rate of 0.1 A/minute and recording the current value when the sample trips. 

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Product Structure Circuit Diagram<br>CIRCUIT<br>ARM  ARM COVER  COVER BASE  NORMAL CIRCUIT AFTER OPENING<br>TERMINAL   PLATE TERMINAL<br>PROJECTION PTC BASE<br>BIMETAL  CONTACT<br>DISC  PROJECTION<br>AVAILABLE WITH AND WITHOUT PROJECTIONS.<br>**----- End of picture text -----**<br>


Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. 

The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. 

## **AA Series Breaker (Thermal Cutoff Device)** 

## ~~**Wiring Recommendations**~~ 

This is not a surface mount device for reflow soldering. Therefore, Ni tab wiring should be accomplished by either resistance or laser welding. Solder connections should be avoided. 

## ~~**Typical Part Marking**~~ 

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DATE CODE:<br>MONTH (1~9, X, Y, Z)<br>DATE<br>YEAR<br>MACHINE NO.<br>ROMAN NUMERAL (I, II, III, ETC.) or<br>       X2715A ARABIC NUMERAL (1, 2, 3, ETC.) = OKAYAMA FACTORY<br>AA77A10 ALPHABET = SHIGA FACTORY<br>          02<br>SERIES DESIGNATOR MANUFACTURER’S TRADEMARK<br>TRIP TEMPERATURE - °C SPECIAL SPECIFICATIONS CODE<br>(72, 77, 82, 85)<br>TERMINAL TYPE<br>ARM MATERIAL<br>(A = Cu ALLOY)<br>MANUFACTURER’S<br>INTERNAL CODE<br>(ALPHANUMERIC CHARACTER)<br>**----- End of picture text -----**<br>


## ~~**Standard Packaging Specifcations**~~ 

Plastic Bag.......................................................................................................................................................................1,000 pcs. (fixed) Inner Box .........................................................................................................................................................................3,000 pcs. (fixed) Outer Box ....................................................................................................................................30,000 pcs. max. (up to 10 inner boxes) 

## ~~**Storage Conditions**~~ 

~~**Application Temperature Range Storage Conditions**~~ ........................................... -30 ~ 100 °C 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 such as from salt breeze, chlorine, hudrogen sulfide, ammonium, sulfide-oxidation, hydrogen chloride, acetate, etc. 3)  Storage period should be no longer than 24 months from date of shipment. 

Tel: +886-2 2562-4117 • Email: asiacus@bourns.com **Asia-Pacific: EMEA:** Tel: +36 88 885 877 • Email: eurocus@bourns.com **The Americas:** Tel: +1-951 781-5500 • Email: americus@bourns.com **www.bourns.com** 

Specifications are subject to change without notice. 

Users should verify actual device performance in their specific applications. 

The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. 

## **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 specified 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 specified in this data sheet, the circuit may not open safely or operate properly. Please test your device for any abnormalities and confirm that the breaker will open the circuit safely in your device. Any use over the maximum electrical rating is at the sole risk of the user. 

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 affixed 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, affix it so that the breaker body and terminals will not move. If not affixed 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 flat 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 flow, reflow or hand-soldering applications. If such application is required, you will need to evaluate whether the breaker is suitable for your specific 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 specific 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 sulfide, ammonium, sulfide-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-saving, life-critical or life-sustaining medical and other related applications where failure or malfunction may result in personal injury, death or severe property or environmental damage. 

Specifications are subject to change without notice. 

Users should verify actual device performance in their specific applications. 

The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. 

## **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 fingers. Handling while wearing finger 

   - 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 affixed. 

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 specification. 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. Confirm the resistance value after each time an additional process is applied. 

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Figure 1 Figure 2 Figure 3 Figure 4<br>Rod A<br>Rod B<br>Figure 5 Figure 6 Figure 7 Figure 8<br>Rod A<br>45 ° 45 °<br>45 ° 45 °<br>Rod B<br>Figure 9 Due to possible updates to safety standards and other reasons, there may be changes in<br>specifications for this data sheet without prior notification. Therefore, before design-in for<br>your application, please contact us for the most up-to-date specifications.<br>milliohm meter<br>**----- End of picture text -----**<br>


REV. 02/23 

Specifications are subject to change without notice. 

Users should verify actual device performance in their specific applications. 

The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.