Axial Lead Reed Switches Low Power > MDSR-10 MDSR-10 10.2mm Sub-miniature Reed Switch RoHS Description The MDSR-10 Reed Switch is a sub-miniature, normally open switch with a 10.16mm long x 1.80mm diameter (0.400” x 0.071”) glass envelope, capable of switching 200Vdc at 10W. It has high insulation resistance of 10¹² ohms minimum and low contact resistance of less than 120 milli-ohms. This reed switch is also available in a surface mount version, that is, MDSM-10. Features • Sub-miniature normally open switch • Capable of switching 200Vdc or 0.5A at up to 10W Agency Approvals Agency Agency File Number Ampere-Turns Range E47258 E471070 10-25 AT DEMKO 14 ATEX 1393U 10-25 AT Benefits • Hermetically sealed switch contacts are not affected by and have no effect on their external environment • Low space requirement Dimensions • 1012 Ohms insulation resistance • Available sensitivity range 10-25 AT • Zero operating power required for contact • Excellent for switching microcontroller logic level loads Applications Dimensions in mm (inch) 20.19 (.795) REF. CL OF OVERLAP 1.80 (.071) MAX. 0.43 (.017) DIA. REF. • Reed Relays (particularly suited to ATE type applications) • Security Systems • Limit Switching • Office Equipments Switch Type 14.39 (.595) MIN. 10.16 (.400) MAX. 40.38 (1.590) NOM. Contact Form A (SPST-NO) Materials Body: Glass Leads: Tin-plated Ni-Fe wire Note: SPST-NO = Single-pole, single-throw, normally open Electrical Ratings Contact Rating W/VA - max. 10 Vdc - max. Vac - max. Vdc - min. 200 140 250 Carry Adc - max. Aac - max. Adc - max. 0.50 0.35 1.00 Resistance Contact, Initial Insulation Ω - max. Ω - min. 0.120 1012 Capacitance Contact pF - typ. 0.2 Temperature Operating Storage 5 °C °C -40 to +125 -65 to +125 Voltage Current 1 3 Switching 2 Breakdown 3 Switching 4 2 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. © 2015 Littelfuse Specifications are subject to change without notice. littelfuse.com Axial Lead Reed Switches Low Power > MDSR-10 MDSR-10 10.2mm Sub-miniature Reed Switch Product Characteristics Operating Characteristics Operate Time 1 0.5ms - max. Release Time 1 0.1ms - max. Shock 2 Vibration 11ms 1∕2 sine wave 100G - max. 50-2000 Hertz 30G - max. 2 Resonant Frequency 8.5kHz - typ. Magnetic Characteristics Pull-In Range 3 Rating Sensitivity 4 Ampere Turns 10-25 Ampere Turns 15 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. Drop-Out vs. Pull-In Chart Part Numbering System 25 MDSR-10-10-15 Max. Drop-Out (AT, L4989 Coil) 20 Series 15 AT Range 10-25 AT 10-15 AT 15-20 AT 20-25 AT Min. 10 5 Example: 10-15 AT product is MDSR-10-10-15 Note: These AT values are the before-modification values of the bare reed switch. 0 0 5 10 15 20 25 30 35 Additional Information Pull-In (AT, L4989 Coil) Note: Chart represents the range of Drop-Out, min to max for a given Pull-In value. Datasheet Packaging Packaging Option Packaging Specification Bulk © 2015 Littelfuse Specifications are subject to change without notice. Bulk Quantity 1000 Resources Quantity & Packaging Code N/A Samples Taping Width N/A littelfuse.com