? 2017 littelfuse revised: 07/18/17 specifcations are subject to change without notice. mvsr-20 19.7mm reed switch description the mvsr-20 reed switch is a miniature, normally open switch with a 19.69mm long x 2.66mm diameter (0.775 x 0.105) glass envelope, capable of high voltage switching of up to 1kvdc at 1ma. it has high insulation resistance of 1012 ohms minimum and contact resistance less than 100 milli-ohms. agency approvals agency agency file number ampere-turns range pending 17-38 at pending 17-38 at switch type contact form a (spst-no) materials body: glass leads: tin-plated ni-fe wire axial lead reed switches features ? miniature normally open switch ? capable of switching 1000vdc at 1ma or 0.5a up to 10w ? minimum voltage breakdown 2000 vdc ? available sensitivity range 17-38 at benefits ? hermetically sealed switch contacts are not affected by and have no effect on their external environment ? zero operating power required for contact closure applications ? reed relays (particularly suitable for high voltage breakdown applications) ? security ? limit switching ? telecoms line switching ? industrial equipment dimensions dimensions in mm (inch) high voltage > mvsr-20 rohs note: spst-no = single-pole, single-throw, normally open cl of overla p (2.235 )n om . (.775) max. 56.7 7 19.69 17.39 (.685 )m in. (1.1 17 )r ef . 28.3 7 (.105 )m ax. (.022 )d ia .r ef . 0.55 2.6 6 electrical ratings contact rating 1 w/va - max. 10 voltage 3 switching 2 breakdown 4 vdc - max. vdc - min. 1000 2000 current 3 switching 2 carry adc - max. adc - max. 0.50 1.30 resistance contact, initial insulation - max. - min. 0.100 10 12 capacitance contact pf - typ. 0.2 temperature operating storage 5 c c -75 to +125 -75 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. note: contact littelfuse for specific agency approval ratings. littelfuse.com preliminary
? 2017 littelfuse revised: 07/18/17 specifcations are subject to change without notice. magnetic characteristics pull-in range 3 ampere turns 17-38 rating sensitivity 4 ampere turns 35 test coil l4989 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 0.75ms - max. release time 1 0.30ms - max. shock 2 11ms 1M2 sine wave 100g - max. vibration 2 50-2000 hertz 30g - max. resonant frequency 3.2khz - typ. part numbering system notes: 1. operate (including bounce)/release time - per eia/narm rs-421-a,diode suppressed coil (coil ii). 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 voltage > mvsr-20 mvsr-20 19.7mm reed switch mvsr-20-22-28 series at range 17-23 at 17-28 at 22-28 at 22-33 at 27-33 at 27-38 at 32-38 at example: 22-28 at product is mvsr-20-22-28 note: chart represents the range of drop out, min to max for a given pull-in value. 5 0 10 15 20 25 30 5 0 pull-in (a t, l4989 coil) dr op-out (a t, l4989 coil) 10 15 20 25 30 35 40 ma x. mi n. note: these at values are the before-modification values of the bare reed switch. littelfuse.com preliminary
? 2017 littelfuse revised: 07/18/17 specifcations are subject to change without notice. surface mount reed switches low power > masm-14 littelfuse.com
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