? 2015 littelfuse specifcations are subject to change without notice. mlrr-4 15.2mm sub-miniature close differential reed switch description the mlrr-4 reed switch is a sub-miniature, normally open switch with a 15.24mm long x 2.54mm diameter (0.600 x 0.100) glass envelope, and capable of switching 200vdc at 20w with close differential (cd) characteristics. it has high insulation resistance of 10 10 ohms minimum and contact resistance less than 100 milli-ohms. it can handle lamp loads up to 2w @ 14v with no suppression circuitry. this reed switch is also available in a surface mount version, that is, mlsm-4. agency approvals agency agency file number ampere-turns range e47258 e471070 17-38 at demko 14 atex 1393u 17-38 at switch type contact form a (spst-no) materials body: glass leads: tin plated nickel iron axial lead reed switches features ? sub-miniature normally open switch ? capable of switching 200vdc or 1.0a at up to 20w ? close differential at between pi and do value ? available sensitivity range 17-38 at ? capable of switching small incandescent lamp loads benefits ? hermetically sealed switch contacts are not affected by and have no effect on their external environment ? zero operating power required for contact closure ? excellent for switching microcontroller logic level loads and small incandesent lamp loads applications ? position sensing ? security systems ? level sensing ? light inductive loads ? office equipments ? lamp loads up to 2w @ 14v dimensions dimensions in mm electrical ratings contact rating 1 watt - max. 20 voltage 3 switching 2 breakdown 4 vdc - max. vac - max. vdc - min. 200 140 250 current 3 switching 2 carry adc - max. aac - max. adc - max. 1.0 0.7 1.0 resistance contact, initial insulation - max. - min. 0.10 10 10 capacitance contact pf - typ. 0.4 temperature operating storage 5 c c -40 to +125 -65 to +125 high power > mlrr-4 rohs note: spst-no = single-pole, single-throw, normally open 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. cl of o verlap 20.1 9 (.795) ref . 1 2.1 9 (.480) min. 1 5.24 (.60 0) max. 40.38 (1 .590) nom. ?2.66 (.1 05) max. 0.61 (0.024) dia. ref . littelfuse.com
? 2015 littelfuse specifcations are subject to change without notice. ? 2015 littelfuse 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 3000 n/a n/a product characteristics operating characteristics operate time 1 0.6ms - max. release time 1 0.2ms - max. shock 2 11ms 1M2 sine wave 100g - max. vibration 2 50-2000 hertz 30g - max. resonant frequency 6.25khz - typ. part numbering system magnetic characteristics pull-in range 3 ampere turns 17-38 rating sensitivity 4 ampere turns 20 test coil l4989 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. note: the chart represents the range of drop-out, minimum to maximum for a given pull-in value. note: this at value is the before-modification value of the bare reed switch. mlrr-4-17-23 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: 17-23 at product is mlrr-4- 17-23 axial lead reed switches high power > mlrr-4 mlrr-4 15.2mm sub-miniature close differential reed switch additional information datasheet samples resources 0 05 10 15 20 25 pull-in (a t, l4989 coil) dr op-out (a t, l4989 coil) 30 35 40 45 max. min. 50 5 10 15 20 25 30 35 40 littelfuse.com littelfuse.com
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