ntc thermistors: type nhqt surface mount chip 0402 size description: a range of 0402 size surface mount ntc chip thermistors. 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 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. 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 ..................................... 4s max 0.2 0.1mm 0.5 0.15 mm 0.45 0.15mm 1.0 + 0.15 mm - 0.10 mm dimensions: code r25 w w w w b 25/85 k nhqt400b285r5 40 2850 nhqt500b285r5 50 2850 nhqt600b285r5 60 2850 nhqt101b285r5 100 2850 nhqt151b285r5 150 2850 nhqt102b330r5 1000 3300 nhqt202b410r5 2000 4100 nhqt252b410r5 2500 4100 nhqt302b410r5 3000 4100 nhqt332b410r5 3300 4100 nhqt352b410r5 3500 4100 nhqt402b410r5 4000 4100 nhqt652b410r5 6500 4100 nhqt153b380r5 15000 3800 nhqt203b380r5 20000 3800 nhqt223b380r5 22000 3800 nhqt303b400r5 30000 4000 nhqt473b400r5 47000 4000 nhqt683b400r5 68000 4000 nhqt104b425r5 100000 4250 nhqt154b425r5 150000 4250 nhqt204b425r5 200000 4250 d-nhqt-1 crown industrial estate, priorswood road 808 us highway 1 967 windfall road taunton, somerset ta2 8qy uk edison, new jersey 08817-4695 usa st. marys, pennsylvania 15857-3397 usa tel +44 (0) 1823 335200 tel +1 (732) 287 2870 tel +1 (814) 834 9140 fax +44 (0) 1823 332637 fax +1 (732) 287 8847 fax +1 (814) 781 7969 g
|
