808 us highway 1 edison, new jersey 08817-4695 usa tel +1 (732) 287 2870 fax +1 (732) 287 8847 crown industrial estate, priorswood rd taunton, somerset ta2 8qy uk tel +44 (0)1823 335200 fax +44 (0)1823 332637 967 windfall road st marys, pennsylvania 15857-3397 usa tel +1 (814) 834 9140 fax +1 (814) 781 7969 ntc thermistors: type nhqm surface mount chip 0805 size description: a range of 0805 size surface mount ntc chip thermistors. dimensions: features: ? palladium silver electrodes with nickel barrier and solder plating ? intended for temperature measurement, control and compensation ? excellent solderabilty without tombstoning ? suitable for standard soldering techniques ? glass-coated ceramic between electrodes for improved stability resistance tolerance at 25c .................. 5% ........... (for 10% replace r5 by r10 in code) tolerance on b value .......................... 200 k minimum temperature ............................ -40c maximum temperature .......................... 125c dissipation factor ............................. 1. 5mw/k time constant ..................................... 5s max data: soldering recommendations: maximum storage time in closed package....1 year maximum storage time exposed to ambient conditions of i5c - 30c, 15% - 70% rh ...30 days drying prior to soldering: not to exceed 48h at 80c ............................................ or 16h at 100c .............................................. or 8h at 125c flux type .......................................... r or rma flow soldering conditions: preheat temperature .................... 80 - 150c max rate of change of temperature ....... 2.5c/s max solder temperature ......................... 265c max dwell time ........................................ 10s cooling in ambient or air flow of ............... 5m/s reflow soldering conditions: method ........................ infrared, hot gas, vapor max rate of change preheat temperature . 2.5c/s max temp ............................................ 225c max time above 200c ............................. 30s max radiant flux (0. 1 to 100w ) ........ 5w/cm 2 max hot air temperature ........... 275c at 4 m/s max vapor temperature .......................... 215c max rate of cooling .............................. 2.5c/s cleaning: ultrasonic cleaning in methanol or isopropanol not exceeding 40 khz for 5 minutes or aqueous clean- ing not exceeding 70c for 7 minutes, is recom- mended. 0.4 0.2mm 1.25 0.2mm 1.2 mm max 2.0 0.2mm code r25 w w w w b 25/85 k nhqm400b280r5 40 2800 nhqm800b280r5 80 2800 nhqm101b280r5 100 2800 nhqm221b310r5 220 3100 nhqm471b325r5 470 3250 nhqm501b325r5 500 3250 nhqm801b325r5 800 3250 nhqm102b325r5 1000 3250 nhqm152b345r5 1500 3450 nhqm202b410r5 2000 4100 nhqm252b410r5 2500 4100 nhqm272b410r5 2700 4100 nhqm302b410r5 3000 4100 nhqm472b355r5 4700 3550 nhqm502b355r5 5000 3550 nhqm682b375r5 6800 3750 nhqm103b375r5 10000 3750 nhqm153b400r5 15000 4000 nhqm20b4003r5 20000 4000 nhqm223b400r5 22000 4000 nhqm273b400r5 27000 4000 nhqm303b400r5 30000 4000 nhqm333b400r5 33000 4000 nhqm473b415r5 47000 4150 nhqm503b415r5 50000 4150 nhqm104b425r5 100000 4250 nhqm154b425r5 150000 4250 nhqm304b425r5 300000 4250 nhqm474b435r5 470000 4350 nhqm504b435r5 500000 4350 data sheet d-nhqm-4 g
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