CO LO & MP LI GE AN N T FR EE *R oH S ** HA Applications ■ Smallest body size, high current type ■ Overtemperature and overcurrent protection Battery cell protection for: ■ Notebook PCs ■ Tablet PCs ■ Smart phones ■ Mobile phones for lithium polymer and prismatic cells 1 1 5 5 NR C 7 51 2A Features ■ Controls abnormal, excessive current instantaneously B0 ■ Wide range of temperature options Komatsulite™ NR Series A-Type Breaker Ratings Model Specification Trip Temperature NR72AB0 NR77AB0 NR82AB0 NR85AB0 72 °C ± 5 °C 77 °C ± 5 °C 82 °C ± 5 °C 85 °C ± 5 °C Reset Temperature 40 °C min. Contact Rating DC12V / 25 A, 6000 cycles Maximum Breaking Current DC5V / 60 A, 100 cycles Maximum Voltage DC28V / 25 A, 100 cycles Minimum Holding Voltage 2 V @ 25 °C for 1 minute Maximum Leakage Current 200 mA max. @ 25 °C Resistance 5 milliohms max. Agency Recognition Product Dimensions 4.8 ± 0.1 (.189 ± .004) 3.2 ± 0.1 (.126 ± .004) Description 3.2 ± 0.1 (.126 ± .004) 0.1 ± 0.01 (.004 ± .0004) UL, cUL TUV 2.0 ± 0.1 (.079 ± .004) NR 77 A B 0 2.8 ± 0.1 (.110 ± .004) DIMENSIONS: MM (INCHES) Series Designator Trip Temperature (±5 °C) • 72 • 82 • 77 • 85 Arm Material A = Cu Alloy High Current Type Product Structure COVER ARM TERMINAL PROJECTION File Number: R50203147 How to Order 0.89 ± 0.05 (.035 ± .002) 2.0 ± 0.1 (.079 ± .004) File Number: E215638 BASE COVER PLATE ARM Terminal Type (with/without Projection & Terminal Length) Manufacturer’s Internal Code CONTACT PTC BIMETAL DISC PROJECTION BASE TERMINAL AVAILABLE WITH AND WITHOUT PROJECTIONS. *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. Specifications 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 specific applications. Komatsulite™ NR Series A-Type Breaker MF-NSMF Series - PTC Resettable Fuses Typical Performance Current (A) Current vs. Temperature Curves 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 20 30 40 50 NR72AB0 (Low 67 °C average) NR77AB0 (Low 72 °C average) NR82AB0 (Low 77 °C average) NR85AB0 (Low 80 °C average) 60 70 80 Temperature (°C) 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. Operation NORMAL CIRCUIT CURRENT CIRCUIT AFTER OPENING EXCESSIVE CURRENT AND/OR HEAT VERY LOW CURRENT Specifications 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 specific applications. Komatsulite™ NR Series A-Type Breaker MF-NSMF Series - PTC Resettable Fuses 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 1253A DIRECTION MARK (ALPHANUMERIC CHARACTER) DATE CODE: MONTH (1~9, X, Y, Z) DATE YEAR MACHINE NO. ROMAN NUMERAL (I, II, III, ETC.) = OKAYAMA FACTORY ARABIC NUMERAL (1, 2, 3, ETC.) = SHIGA FACTORY ** NR77AB0 MANUFACTURER’S TRADEMARK MANUFACTURER’S INTERNAL CODE TERMINAL TYPE ARM MATERIAL (A = Cu ALLOY) TRIP TEMPERATURE - °C (72, 77, 82, 85) SERIES DESIGNATOR Standard Packaging Specifications Plastic Bag.......................................................................................................................................................................1,000 pcs. (fixed) Inner Box .........................................................................................................................................................................5,000 pcs. (fixed) Outer Box ....................................................................................................................................50,000 pcs. max. (up to 10 inner boxes) Japan: Tel: +81-6 6319 2281 • Fax: +81-6 6319 2284 Asia-Pacific: Tel: +886-2 2562-4117 • Fax: +886-2 2562-4116 EMEA: Tel: +36 88 520 390 • Fax: +36 88 520 211 The Americas: Tel: +1-951 781-5500 • Fax: +1-951 781-5700 www.bourns.com/komatsulite Specifications 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 specific applications. Komatsulite™ NR Series A-Type Breaker MF-NSMF Series - PTC Resettable Fuses Caution when using Breaker Before using the breaker, please fully read the DESIGN AND HANDLING CAUTIONS stated below so that there will be no 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 be deteriorated due to breaker arm damage. 2. If used over the electrical rating, the circuit may not open safely. Please test your device for any abnormalities and confirm 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. After the breaker is mounted, affix it so that the breaker body and terminals will not move. If not affixed, breaker resistance could increase or contact open due to stress during handling or vibration/shock during transportation. 5. 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. 6. If breaker is to be resin-molded, test and evaluate 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. The breaker is not designed nor guaranteed for flow, reflow or hand-soldering applications. If such application is required, test and evaluate in your specific application to confirm that the breaker can be used. 10. When mounting and after mounting the breaker, do not apply supersonic vibration. Vibration and heat may cause the breaker resistance to increase or may cause body damage. If you apply supersonic vibration after mounting the breaker, test and evaluate in your specific application to confirm that the breaker can be used. 11. Do not use the breaker in the following abnormal 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 sulfide, ammonium, sulfide-oxidation, hydrogen chloride, and anywhere there is a possibility of generating corrosive gas such as ulfurous acid gas e) Strong static electric charge or electromagnetic wave 12. Thie breaker is not designed or tested for, and should not be used in aerospace, airplane, nuclear, military, life-sustaining medical and other related equipment. Specifications 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 specific applications. Komatsulite™ NR Series A-Type Breaker MF-NSMF Series - PTC Resettable Fuses 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 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 20 ° 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 there will be no stress as 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 close point to the breaker body by “4-point clip method” using a milliohm meter to ensure accuracy (refer to Figure 9). 6. Avoid putting stress as shown above in 3-a) to 3-g) when the jig is used for welding/additional processing. Figure 2 Figure 1 Figure 7 Figure 6 Figure 5 Figure 4 Figure 3 45 ° 45 ° 45 ° 45 ° Rod A Figure 8 Rod A Rod B Rod B Figure 9 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. milliohm meter 06/08/15 Specifications 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 specific applications.