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Document overview

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Technical content

Features

n Miniature Thermal Cutoff (TCO) device n Surface mount, smallest body size n Overtemperature and overcurrent protection n Controls abnormal, excessive current virtually instantaneously, up to rated limits n Wide range of temperature options n High corrosion resistance n Two height options: low profile & high force withstand

Applications

n Battery cell protection for: - Notebook PCs - Tablet PCs - Smart phones n Overtemperature protection for: - USB Type C cables (e.g. smart phone cables, notebook AC adapters) - Electronic cigarettes - Medical heaters*** SC Series Breaker (Surface Mount 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. * Excluding life-saving, life-critical or life-sustaining applications. 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. Ratings Agency Recognition

Description

UL, cUL File Number: E215638 (UL 60730) TUV File Number: R 50411018 0001~0002 (EN 60730 2-9-2010) How to Order SC 77 A A B Series Designator Trip Temperature (±5 °C)

  • 72
  • 77
  • 82
  • 85 Arm Material A = Cu Alloy, High current type Body Material A = PPS Body Thickness A = 1.07 ± 0.05 mm B = 0.94 ± 0.05 mm Specification A-TYPE SC72AAA, SC72AAB SC77AAA, SC77AAB SC82AAA, SC82AAB SC85AAA, SC85AAB 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 / 25 A, 6000 cycles Maximum Breaking Current DC5 V / 50 A, 100 cycles Maximum Voltage DC28 V / 25 A, 100 cycles Minimum Holding Voltage 3 V @ 25 °C for 1 minute Maximum Leakage Current 200 mA max. @ 25 °C Resistance 5 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) 4134 NSC 7 7 A Product Structure Circuit Diagram NORMAL CIRCUIT CIRCUIT AFTER OPENING 4.7 (.185) 4.4 +0.25/-0.05 (.173 +.010/-.002) ARM TERMINAL BASE TERMINAL COVER BIMETAL DISC ARM COVER PLATE BASE CONTACTPTC 2.8 (.110) 0.125 (.005) R 4 PLCS. 4 PLCS. 1.07 ± 0.05 (.042 ± .002) SCxxAAA 0.94 ± 0.05 (.037 ± .002) SCxxAAB 0.08 (.003) 1.71 (.067) 1.71 (.067) 0.5 (.020) 1.54 (.061) 1.49 (.059) BASE TERMINALS ARM TERMINALS 3.42 (.135) 2.3 (.091) 0.7 (.028) BASE TERMINALS ARM TERMINALS 0.7 (.028)
  • Model SCxAAB is the low profile 0.94 mm height version.
  • Model SCxAAA is designed with a reinforced cover to withstand higher forces during the USB cable manufacturing injection molding process. WARNING Cancer and Reproductive Harm - www.P65Warnings.ca.gov

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. SC Series Breaker (Surface Mount Thermal Cutoff Device) Product Dimensions DIMENSIONS: MM (INCHES) Typical Performance Current vs. Temperature Curves A-Type Temperature (°C) Current (A) 20 30 40 50 60 70 80 SC72Aɹ(Low 67 °C avg.) SC77Aɹ(Low 72 °C avg.) SC82Aɹ(Low 77 °C avg.) SC85Aɹ(Low 80 °C avg.) 4.7 (.185) 4.4 +0.25/-0.05 (.173 +.010/-.002) ARM TERMINAL BASE TERMINAL COVER BIMETAL DISC ARM COVER PLATE BASE CONTACTPTC 2.8 (.110) 0.125 (.005) R 4 PLCS. 4 PLCS. 1.07 ± 0.05 (.042 ± .002) SCxxAAA 0.94 ± 0.05 (.037 ± .002) SCxxAAB 0.08 (.003) 1.71 (.067) 1.71 (.067) 0.5 (.020) 1.54 (.061) 1.49 (.059) BASE TERMINALS ARM TERMINALS 3.42 (.135) 2.3 (.091) 0.7 (.028) BASE TERMINALS ARM TERMINALS 0.7 (.028)

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. SC Series Breaker (Surface Mount Thermal Cutoff Device) Surface Mount Recommendations The Model SC Series breaker is designed for reflow and hand soldering. It is not designed or warranted for flow soldering. The following conditions must be adhered to: Reflow Soldering: The recommended reflow soldering conditions are as follows: Process breaker in a reflow furnace using the profile shown above three times, followed by positioning the breaker in ambient temperature of +25 °C for 8 hours. Time (Seconds) Temperature (°C) 120 150 180 210 240 270 06 0 120 180 240 300 360 TEMPERATURE 150 ~ 180 °C ≤ 220 °C 245 °C _ TIME 100 ~ 150 Seconds 20 ~ 40 Seconds Peak Do not expose the breaker to temperatures exceeding +260 °C. Recommended Reflow Profile Recommended Land Pattern Recommended Mask Thickness: 0.12 mm / (.005 in.) Recommended Solder Particle Size: 30 µm Mounting Cautions In order to protect the housing and mechanical parts inside from deformation, prevent excessive load at the time of part absorption / part deployment and mounting. A part absorption nozzle more than 2 mm in diameter with a 3 N (5 N max.) mounting load is recommended. Any shock to the product by the nozzle during the mounting procedure may have a negative impact on the function of the breaker. DIMENSIONS: MM (INCHES) 4.7 (.185) 4.4 +0.25/-0.05 (.173 +.010/-.002) ARM TERMINAL BASE TERMINAL COVER BIMETAL DISC ARM COVER PLATE BASE CONTACTPTC 2.8 (.110) 0.125 (.005) R 4 PLCS. 4 PLCS. 1.07 ± 0.05 (.042 ± .002) SCxxAAA 0.94 ± 0.05 (.037 ± .002) SCxxAAB 0.08 (.003) 1.71 (.067) 1.71 (.067) 0.5 (.020) 1.54 (.061) 1.49 (.059) BASE TERMINALS ARM TERMINALS 3.42 (.135) 2.3 (.091) 0.7 (.028) BASE TERMINALS ARM TERMINALS 0.7 (.028)

Standard Packaging Specifications Part name, part number, quantity, lot number, safety approval mark (UL, etc.), company name (Bourns KK) and any other items required by the customer 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. SC Series Breaker (Surface Mount Thermal Cutoff Device) REEL CARRIER TAPE DIMENSIONS: MM (INCHES) 13.5 ± 1.0 (.531 ± .039) 17.5 ± 1.0 (.689 ± .039) 21.0 ± 0.8 (.827 ± .031) 1.0 (.039)R 13.0 ± 0.2 (.512 ± .008) DIA. DIA. CENTER HOLE ENLARGEMENT 2.0 ± 0.5 (.079 ± .020) 2.0 (.079) 2.8 (.110) 2.0 (.079) 13.0 ± 0.2 (.512 ± .008) 80.0 ± 1.0 (3.150 ± .039) DIA. 330.0 ± 2.0 (12.992 ± .079) DIA. 10.0 (.394) DIA. 90.0 (3.543) DIA. 35 ° 5.0 (.197)R 0.2 0.4 0.6 0.8 NOTES: 1) The corner and ridge radiuses (R) of inside cavity are 0.3 mm / (.012 in.) max. 2) Cumulative tolerance of 10 pitches of the sprocket hole is ±0.2 mm / (.008 in.). 3) Measuring of cavity positioning is based on cavity center in accordance with JIS/IEC standard. DIA. 1.50 +0.1/-0 (.059 +.004/-.000) 1.75 (.069) 5.5 (.217) 12.00 +0.2/-0.1 (.472 +.008/-.004) 2.00 (.079) 4.00 (.157) 8.00 (.315) 3.15 (.124) 0.3 ± 0.05 (.012 ± .002) 5.05 (.199) 1.2 +0.2/-0.1 (.047 +.008/-.004) 1.5 +0.2/-0.1 (.059 +.008/-.004) TOLERANCES: 0.1 UNLESS OTHERWISE NOTED (.004)

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. SC Series Breaker (Surface Mount Thermal Cutoff Device) Application Temperature Range Storage Conditions 1) The breaker must be stored in the standard packaging 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, hydrogen sulfide, ammonium, sulfide-oxidation, hydrogen chloride, acetate, etc. 3) Storage period should be no longer than 24 months from date of shipment. 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 9018N SC **AAB SERIES DESIGNATOR MANUFACTURER’S INTERNAL CODE (ALPHANUMERIC CHARACTER) TRIP TEMPERATURE - °C (72, 77, 82, 85) ARM MATERIAL (A = Cu ALLOY HIGH CURRENT TYPE) THICKNESS RESIN TYPE (A = PPS) Environmental Specifications

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. SC Series Breaker (Surface Mount 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 before proceeding. 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. If breaker is to be resin-molded, test and evaluate the application to determine whether the breaker can be used effectively. 7. The breaker cannot be used as a repetitive ON-OFF thermostat. 8. The breaker is not washable. Do not wash. 9. Do not let a solder iron touch the breaker body. 10. Do not attach solder to the breaker body. 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, acetate 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. SC Series Breaker (Surface Mount 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. When 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 5 N (AAB) or 10 N (AAA) moment to the breaker body (refer to Figure 1) b) Do not apply more than 1.5 cN-m (AAB) or 3 cN-m (AAA) twist torque to the breaker body (refer to Figure 2) c) Do not apply more than 15 N (AAB) or 30 N (AAA) bending force to the breaker body (refer to Figure 3) Due to possible updates to safety standards and other reasons, there may be changes in specifications for this data sheet without prior notification. Therefore, before design-in for your application, please contact us for the most up-to-date specifications. Asia-Pacific: Tel: +886-2 2562-4117 Email: asiacus@bourns.com Europe: Tel: +36 88 520 390 Email: eurocus@bourns.com The Americas: Tel: +1-951 781-5500 Email: americus@bourns.com www.bourns.com Figure 1 Figure 2 Figure 3

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