type jag micro fuse is designed for circuit protection against excessive current in portable electronic equipment, electric c ircuit around battery, etc. because the demand for high capacity batteries is increasing. wire material is adopted for fuse ele ment, and the performance against rush current is increased in spite of compact design. also, the ecology design of type jag is environmentally friendly because of complete lead - free. 1. our original construction design has excellent fusing and cutting characteristics. 2. especially, performance against rush current is excellent since wire material is used for fuse element. 3. surface temperature rise is 75 c or less when applying rated current for fusing. this gives less influence to the peripheral uni ts. 4. resistance to soldering heat: reflow or flow soldering 10 seconds at 260 c 5. our original terminal construction makes almost no occurrence of tombstone phenomenon . 6. small size of 3216 (3.2 1.6 1.6 mm) 7. suitable for automatic mounting 8. precise dimensions allows high - density mounting and symmetrical construction of terminals provide Dself - alignment. 9. complete lead - free features catalog numbers and rating n o vember , 2010 rating ordering information type jag type code rv code rated current code rated current code package type code case size 501 180 reel j a g 3 2 0 2 2 5 2 n a 5 2 internal resistance voltage drop m item category temperature range rated current rated voltage voltage drop insulation resistance (between terminals and case) 1
construction standard test body dimensions marking recommended pad dimensions glass epoxy body on one side board thickness : 1.6 mm copper layer : 3 m code space body fuse element terminal main body : glass epoxy terminal : tin plating (mm) case size case code l w t p 3216 52 3.2 0.2 1.6 0.2 1.4 0.2 0.6 0.2 name material, standard, and treatment (mm) a 1.0 b 1.6 c 1.6 (reflow) size 3216 100mm 33mm 1.5mm 5mm 2
no. item performance test method 1 temperature rise temperature rise shall not exceed 75 c . apply rated current. 2 current - carrying ca pacity shall not open within 1 hour. apply 100% of rated current. 3 clearing characteristics arc shall not be continued. marking shall be legible. breaking voltage : 32 v breaking current : 50 a 4 voltage drop voltage drop is below the value specified in catalog numbers and rating. apply rated current. 5 fusing characteristics fusing within 1 min . apply 2 0 0% of rated current. (ambient temperature : 10 ~ 30 c ) 6 insulation resistance 1000 m or more insulation resistance between terminals and case 7 e lectrode strength (bending ) no mechanical damage. resistance change after the test shall be within 20%. board supporting width : 90 mm bending speed : approx. 0.5 mm/s ec. duration : 5 s ec. bending : 3 mm 8 shear test no mechanical damage. resistance cha nge after the test shall be within 20%. applied force : 20 n (2.04 kgf) duration : 10 s ec. tool : r0.5 direction of the press : side face 9 substrate bending test no mechanical damage. resistance change after the test shall be within 20%. supporting d imension : 1.6 mm applied force : 20 n (2.04 kgf) duration : 10 s ec. tool : r0.5 direction of the press : thickness direction of product 1 0 solderability (solder wetting time) solder wetting time : within 3 sec. solder : sn C 3ag C 0.5cu temperature : 245 3 c meniscograph method 11 solderability (new uniform coating of solder) the dipping surface of the terminals shall be covered more than 95% with new solder. solder : jisz3282 h60a, h60s, h63a temperature : 230 2 c meniscograph method solder : sn C 3ag C 0.5cu temperature : 245 3 c dipping : 3 s ec. 1 2 resistance to soldering heat marking shall be legible. no mechanical damage. resistance change after the test shall be within 20%. solder : jisz3282 h60a, h60s, h63a temperature : 230 2 c dipping : 3 s ec. dipping (1 cycle) preconditioning : 100 ~ 150 c , 30 5 s ec. temperature : 26 0 3 c , 5 s ec. reflow soldering (2 cycles) preconditioning : 1 50 180 c t 90 d 30 sec. peak : 250 c holding : 230 c or higher, 30 10 sec. cooling : 3 ~ 6 c /sec or faster manual soldering temperature : 350 10 c duration : 2 ~ 3 sec measure after 1 hour left under room temperature a nd humidity. 1 3 solvent resistance m arking shall be legible. no mechanical damage. no significant irregularity in the appearance. dipping rinse solvent : isopropyl alcohol duration : 90 s ec. 1 4 vibration no mechanical damage. resistance change after the test shall be within 20%. frequency range : 10 ~ 55 ~ 10 hz/m in vibration amplitude : 1.5 mm duration : 2 h ours in each of xyz directions (total : 6 h ours ) 1 5 shock no mechanical damage. resistance change after the test shall be within 20%. peak value : 490 m/s 2 (50g) duration : 11 m s ec . 6 aspects 3 times (total : 18 times) 1 6 thermal shock no mechanical damage. resistance change after the test shall be within 20%. C 55 3 c : 30 m in. room temperature : 2 ~ 3 m in or less 125 2 c : 30 m in. room temperature : 2 ~ 3 m in or less repea t above step for 10 cycles 1 7 moisture resistance no mechanical damage. resistance change after the test shall be within 20%. temperature : 85 3 c humidity : 85 5% rh duration : 1000 h ours 1 8 load life no mechanical damage. resistance change after the test shall be within 20%. temperature : 85 2 c applied current : rated current 70% duration : 1000 h ours 19 moisture resistance load no mechanical damage. resistance change after the test shall be within 20%. temperature : 85 2 c humidity : 85 5% rh applied voltage : rated current 70% duration : 1000 h 2 0 stability no mechanical damage. resistance change after the test shall be within 20%. temperature : 125 2 c duration : 1000 h ours performance +1 - 0 + 5 - 0 3
jag 32 02 322na52 n=100 jag 32 02 322na52 distribution of fusing time distribution of fusing characteristics i 2 t - t char acteristics fusing characteristics 0.001 0.01 0.1 1 10 100 1000 10000 0.001 0.01 0.1 1 10 100 fusing time (sec) joule integral (a 2 s) 0.5a 0.63a 0.8a 1.0a 1.25a 1.6a 2.0a 2.5a 3.15a 4.0a 0.001 0.01 0.1 1 10 100 0.1 1 10 100 applied current (a) fusing time (sec) 0.5a 0.63a 0.8a 1.0a 1.25a 1.6a 2.0a 2.5a 3.15a 4.0a 0.0001 0.001 0.01 0.1 1 10 100 1000 0.1 1 10 100 applied current (a) fusing time (sec) 0.0001 0.001 0.01 0.1 1 10 0 50 100 150 200 250 200% rated current is applied 800% rated current is applied numbers of pcs fusing time (sec) 4
determine the rated value of the micro fuse, and select the correct circuit protection element for your circuit. if you selec t the correct circuit protection element, safe ty of your circuit can be ensured. how to determine the rated value of the circuit protection element is described below: flow for fuse selection 1. measurement of circuit values using actual device measure the circuit values, such as operating curre nt of the circuit. 2. calculation from operating current from the obtained operating current and the category temperature, calculate the minimum rated value to determine the applicable fuse. 3. calculation from overload current from the obtained ove rload current, calculate the maximum rated value to determine the applicable fuse. 4. calculation from inrush current from the inrush current, calculate the minimum rated value to determine the applicable fuse. 5. final determination of rated value from the calculation results of steps 2 through 4, determine the rated value. 6. operation check using actual device after selecting the rating, confirm if the device works properly under the pre - determined conditions. fuse selection 1. m easurement of circuit values using actual device before determining the rated value of the fuse, preliminarily measure the following using the actual device. 1 C 1 operating current using an oscilloscope or equivalents, measure the operating current of the circuit. 1 C 2 overload current using an oscilloscope or equivalents, measure the overload current that needs to break the circuit. 1 C 3 inrush current using an oscilloscope or equivalents, measure the inrush current of the circuit at power - on or power - off. i n addition, determine the number of inrush current applied. 1 C 4 category temperature measure the ambient temperature of the fuse circuit. example to select ratings of type jae effective operating current : 1.2 a effective overload curren t : 6.0 a inrush current waveform : fig. a (pulse width : 1 ms, wave height : 6.0 a) numbers to withstand inrush current : 100,000 times category temperature : 85c 2. calculation from operating current 2 C 1 measurement of operating current using an osc illoscope or equivalents, measure operating current (effective current) of the actual circuit. example : effective operating current = 1.2 a 2 C 2 derating temperature derating factor using fig. b, find the temperature derating factor correspond to the t emperature. rated derating factor rated derating factor = 0.7 8 (constant irrespective of temperature) use formula 1 to calculate the rated current of the fuse to be used for the circuit. rated current of fuse operating current/( ) ... formula 1 ex ample : category temperature = 85c, operating current = 1.2 a temperature derating factor = 0.76 (refer to fig. b.) rated derating factor = 0.7 8 (constant irrespective of temperature) calculation using formula 1 : rated current 1.2/(0.76 0.7 8 ) = 2. 0 2 a the above calculation result shows that the fuse with rated current of 2. 02 a or more should be selected for this circuit. type jag, with rated current of 2.5 a or more can be selected. determination of rated value and selection of micro fuse (type jag) fig. a : inrush current waveform fig. b 6.0a 1ms 5 0 20 40 60 80 100 120 -50 -25 0 25 50 75 100 125 temperature (
3. calculation from overload current 3 C 1 measurement of ov erload current using oscilloscope or equivalents, measure the overload current that needs to break the circuit. example : effective overload current = 6.0 a 3 C 2 calculation from overload current determine the rated current so that the overload current can be 2.0 times larger than the rated current. use formula 2 to calculate the rated current of the fuse. rated current of fuse overload current/2.0 ... formula 2 example : overload current = 6.0 a use formula 2 to calculate the rated current. rated curre nt 6.0/2.0 = 3.0 a the above calculation result shows that the fuse with rated current of 3.0 a or less should be selected for this circuit. type jag, with rated current of 2.5 a or less can be selected. 4. calculation from inrush current 4 C 1 measur ement of inrush current waveform using an oscilloscope or equivalent, measure the waveform of the inrush current of the actual circuit. 4 C 2 creation of approximate waveform generally, the waveform of inrush current is complicated. for this reason, creat e the approximate waveform of inrush current as shown on fig. c to simplify calculation. 4 C 3 calculation of ? 2 t of inrush current calculate ? 2 t (joule integral) of the approximate waveform. the formula for this calculation depends on the approximate waveform. refer to table a. example : pulse applied = 1 ms, peak value = 6.0 a approximate waveform = triangular w ave since the approximate waveform is a triangular wave, use the following formula for calculation. ? 2 t of rush current = 1/3 ? m 2 t ... formula 3 ( ? m : peak value, t : pulse applying time) use formula 3 to calculate i 2 t of the rush current: ? 2 t = 1/3 6 6 0.001 = 0.012 (a 2 s) follow ing formula is generally used for calculation of ? 2 t as i(t) equal to current. 2 t 0 ? ? 2 t dt name waveform ? 2 t name waveform ? 2 t sine wave (1 cycle ) trapezoidal wave sine wave (half cycle) various wave 1 triangular wave various wave 2 rectangular wave charge/ discharge waveform joule - integral values for each waveform fig. c : inrush current waveform red line : actual measurement waveform black line : approximate waveform 6.0a 1ms table a 1 3 ? ? m 2 t 1 + ? ? m 2 (t 2 - t 1 ) + ? ? m 2 (t 3 - t 2 ) 1 3 ? m t 0 1 2 t ? m 0 0 t ? ? m 0 t ? ? m 0 - t ? i ( t ) = ? m e - t/ ? ? m 0.368 ? m ? 2 1 t 1 +{ ? 1 ? 2 + ( ? 1 - ? 2 ) 2 } (t 2 - t 1 )+ ? 2 2 (t 3 - t 2 ) 1 3 1 3 1 3 1 3 ? ? m 2 t ? ? m 2 t 1 2 ? ? m 2 t 1 2 ? ? m 2 t t 2 t 3 ? m 0 t 1 t ? 2 0 ? 1 t 2 0 t 1 t 3 ? 2 ? 1 ? ? m 2 t 1 2 ? 1 ? 2 t + ( ? 1 - ? 2 ) 2 t 1 3 6
4 C 4 search of load ratio set up the number of cycles to withstand. (generally 100,000 times) obtain the load ratio from pulse resistance characterist ics. (fig. d) example : 100,000 times is required against inrush current applied. the load ratio is 20% or less from fig. d. 4 C 5 calculation from joule integral and load ratio use formula 4 to calculate the standar d i 2 t for the fuse to be used. standard , 2 t of fuse > ( , 2 t of inrush current/load ratio) .......... ..........formula 4 example : , 2 t of pulse = 0.012 a 2 s, pulse applied = 1 ms, required load ratio = 20% from formula 4, standard , 2 t of fuse > 0.012/0.2 = 0.06 (a 2 s) the standard , 2 t of the fuse should be 0.06 (a 2 s) or more. since the rush pulse applied is 1 ms, obtain the intersection of 1 ms (horizontal axis) and 0.06 a 2 s (vertical axis) from fig. e (refer to the arrow shown in fig.e). select a fus e whose curve is above the intersection. type jag, with rated current of 0.8 a or more should be selected. 5. final determination of rated value determine the rated current of the micro fuse. the rated current should meet all the calculation results. ex ample : 2.5a meets the all requirement. 6. operation check using actual device after selecting the rating, confirm if the device works properly under the pre - determined conditions. pulse resistance characteristics joule integral vs. fusing time fig. d fig. e 0.001 0.01 0.1 1 10 100 1000 10000 0.0001 0.001 0.01 0.1 1 10 100 fusing time (sec) joule integral (a 2 s) 0.5a 0.63a 0.8a 1.0a 1.25a 1.6a 2.0a 2.5a 3.15a 4.0a 1 10 100 1000 10000 100000 1000000 0 10 20 30 40 50 60 70 80 90 100 load ratio (%) number of pulse resistance (cycle) 7
please feel free to ask our sales department for more information on the micro fuse. overseas sales dep. 5-3,3-chome,sennari-cho,toyonaka-shi,osaka 561-8558,japan tel : 06-6332-0883 fax : 06-6332-0920 head office 5-3,3-chome,sennari-cho,toyonaka-shi,osaka 561-8558,japan tel : 06-6332-0871 fax : 06-6331-1386 url http://w w w .ncc-matsuo.co.jp/ r matsuo matsuo electric co., ltd. specifications on this catalog are subject to change without prior notice. please inquire of our sales department to confirm specifications prior to use. application notes for micro fuse 1. circuit design 5. caution during usage micro fuse should be designated only after confirming (1) micro fuse with electricity should never be touched. micro operating conditions and the micro fuse performance fuse with electricity may cause burning due to the micro characteristics. fuse high temperature. also, in case of touching micro when determining the rated current, be sure to observe the fuse without electricity, please check the safety following items : temperature of micro fuse. (1) micro fuse should always be operated below the rated (2) protective eyeglasses should always be worn when current (the value considered in the temperature derating performing fusing tests. however, there is a fear that micro rate) and voltage specifications.according to item 2,2-2 in fuse will explode during test. during fusing tests, please page 5. cover particles not to fly outward from the board or testing (2) micro fuse should always be operated below the rated fixture. caution is necessary during usage at all times. voltage. (3) micro fuse should be selected with correct rated value to 6. environmental conditions be fused at overload current. (1) micro fuse should not be operated in acid or alkali corrosive (4) when micro fuse are used in inrush current applications, atmosphere. please confirm sufficiently inrush resistance of micro fuse. (2) micro fuse should not be vibrated, shocked, or pressed (5) please do not apply the current exceeding the breaking excessively. current to micro fuse. (3) micro fuse should not be operated in a flammable or (6) use micro fuse under the condition of category explosive atmosphere. temperature. (4) after mounting micro fuse on a board, covering fuses with (7) micro fuse should not be used in the primary power source. resin may affect to the electric characteristics of the micro fuse. please be sure to evaluate it in advance. micro fuse should be selected by determining the operating conditions that will occur after final assembly, or 7. emergency estimating potential abnormalities through cycle testing. in case of fire, smoking, or offensive odor during operation, please cut off the power in the circuit or pull the plug out. 2. assembly and mounting during the entire assembly process, observe micro fuse 8. storage body temperature and the heating time specified in the (1) micro fuse should be stored at room temperature (-10c ~ performance table. in addition, observe the following items : +40c) without direct sunlight but not in corrosive atmosphere (1) mounting and adjusting with soldering irons are not such as h 2 s products or devices in the market. samples are provided ultrasonic cleaning is not recommended for micro fuse. for a particular purpose such as configuration, confirmation this may cause damage to the micro fuse such as broken of electrical characteristics, etc. terminals which results in electrical characteristics effects, etc. depending on the conditions. if ultrasonic cleaning process must be used, please evaluate the effects sufficiently before use. 8
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