? 2017 littelfuse revised: 07/17/17 specifcations are subject to change without notice. drs-dth 39.7mm standard changeover reed switch description the drs-dth reed switch is a large changeover switch with a 39.67mm long x 5.33mm diameter (1.562 x 0.210) glass envelope, capable high voltage and power switching up to 500vdc at 2ma, or 0.5a up to 30w/va. the drs-dth has an insulation resistance of 10 9 ohms minimum and contact resistance of less than 125 milli-ohms. switch type contact form c (spdt-co) materials body: glass leads: tin-plated ni-fe wire axial lead reed switches features ? changeover switch ? capable of switching 500vdc or 0.5a at up to 30w ? minimum voltage breakdown 1200vdc ? available sensitivity range 50-80 at benefits ? hermetically sealed switch contacts are not affected by and have no effect on their external environment ? can be used as changeover or normally closed contact ? capable of switching european mains voltage ? zero operating power required for contact closure applications ? security ? limit switching ? industrial safety applications ? white goods applications dimensions dimensions in mm (inch) high power > drs-dth rohs electrical ratings contact rating 1 w/va - max. 30 voltage 3 switching 2 breakdown 4 vdc - max. vac - max. vdc - min. 500 350 1200 current 3 switching 2 carry adc - max. aac - max. adc - max. 0.50 0.35 3.0 resistance contact, initial insulation - max. - min. 0.125 10 9 capacitance contact pf - typ. 2.0 temperature operating storage 5 c c -20 to +125 -65 to +125 notes: 1. contact rating - product of the switching voltage and current should never exceed the wattage rating. contact littelfuse for additional load/life information. 2. when switching inductive and/or capacitive loads, the effects of transient voltages and/or currents should be considered. refer to application notes an108a and an107 for details. 3. electrical load life expectancy - contact littelfuse with voltage, current values along with type of load. 4. breakdown voltage - per mil-std-202, method 301. 5. storage temperature - long time exposure at elevated temperature may degrade solderability of the leads. 1 .83 (.072) nom. 25.40 (1 .000) nom. 1 2.45 (.490) nom. 38.1 0 - 39.67 (1 .50 0) nom. - (1 .562) max. 85.73 - 84.1 4 (3.375) nom. - (3.31 25) min. 0.25 (.010) nom. cl of o verlap 5.54 (.21 8) max. 27 .66 (1 .89) ref . 5.33 (.21 0) max. 1 .02 (.040) dia. ref . 1 .27 (.050) dia. ref . note: spdt-co = single-pole, double-throw, change over littelfuse.com preliminary
? 2017 littelfuse revised: 07/17/17 specifcations are subject to change without notice. drop-out vs. pull-in chart packaging packaging option packaging specification quantity quantity & packaging code taping width bulk bulk 1000 n/a n/a product characteristics operating characteristics operate time 1 4.5ms - max. release time 1 7.0ms - max. shock 2 11ms 1M2 sine wave 10g - max. vibration 2 50-2000 hertz 15g - max. resonant frequency hz - typ. 2.75khz - typ. part numbering system notes: 1. operate (including bounce)/release time - per eia/narm rs-421-a,diode suppressed coil (coil iv). 2. shock and vibration - per eia/narm rs-421-a and mil-std-202. 3. pull-in range - contact littelfuse for narrower at ranges available. 4. rating sensitivity - the value at which contact ratings and operating characteristics are determined. derating may be required below this value. 5. custom modifications of forming and/or cutting of reed switches are available. please contact littelfuse. axial lead reed switches high power > drs-dth drs-dth 39.7mm standard changeover reed switch drs-dth-50-80 series at range 50-55 at 50-60 at 50-80 at 55-60 at 55-65 at 65-70 at 65-80 at 70-75 at 70-80 at 75-80 at example: 50-80 at product is drs-dth-50-80 note: chart represents the range of drop-out, min to max for a given pull-in value. note: these at values are the before-modification values of the bare reed switch. magnetic characteristics pull-in range 3 ampere turns 50-80 rating sensitivity 4 ampere turns 60 test coil l4988 10 0 20 30 40 50 60 70 10 0 pull-in (l4988 coil) dr op-out (l4988 coil) 20 30 40 50 60 70 80 90 ma x. mi n. littelfuse.com preliminary
|
