Surface Mount Reed Switches Low Power > MDSM-10 MDSM-10 10.2mm Sub-miniature Surface Mount Reed Switch RoHS Description The MDSM-10 Reed Switch is a sub-miniature, surface mounting, 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. This reed switch is a surface mount version of the MDSR-10. It has high insulation resistance of 10¹² ohms minimum and low contact resistance of less than 120milli-ohms. Features • Surface mounting normally • Low, stable contact resistance Agency Approvals open switch • Available sensitivity 10-25 AT • Capable of switching 200Vdc or Agency Agency File Number Ampere-Turns Range 0.5A at up to 10W E47258 10-25 AT Benefits E471070 DEMKO 14 ATEX 1393U 10-25 AT • Hermetically sealed switch • Low space requirement contacts are not affected by and • Zero operating power required for have no effect on their external contact closure environment • Excellent for switching Dimensions microcontroller logic level loads Dimensions in mm (inch) Ø1.80 1.00±0.10 (.071) MAX (.045 +/-.004) TYP Applications • Position Sensing • Security • Level Sensing • Metering 12.45±0.25 (.490±.010) 10.16 (.400)MAX 2.00 MAX Switch Type (.078) 15.62±0.10 Contact Form A (SPST-NO) (.615±.010) 2x0.00 MIN (.000) Body: Glass Materials RECOMMENDED LAND PATTERN Leads: Tin-plated Ni-Fe wire 1.30 (.051) TYP. 2.90 (.114) TYP. Note: SPST-NO = Single-pole, single-throw, normally open 11.20 (.441) Note: Land pattern is Littelfuse recommendation only. User is responsible for proper PCB design. Electrical Ratings Contact Rating 1 W/VA - max. 10 Switching 2 Vdc - max. 200 Voltage 3 Vac - max. 140 Breakdown 4 Vdc - min. 250 Switching 2 Adc - max. 0.50 Current 3 Aac - max. 0.35 Carry Adc - max. 1.00 Ω - max. 0.12 Resistance Contact, Initial Insulation Ω - min. 1012 Capacitance Contact pF - typ. 0.2 Operating °C -40 to +125 Temperature Storage 5 °C -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. © 2015 Littelfuse littelfuse.com Specifications are subject to change without notice.

Surface Mount Reed Switches Low Power > MDSM-10 MDSM-10 10.2mm Sub-miniature Surface Mount Reed Switch Product Characteristics Operating Characteristics Operate Time 1 0.5ms - max. Release Time 1 0.1ms - max. Shock 2 11ms 1∕2 sine wave 100G - max. Vibration 2 50-2000 Hertz 30G - max. Resonant Frequency 6.5kHz - typ. Magnetic Characteristics Pull-In Range 3 Ampere Turns 10-25 Rating Sensitivity 4 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. These AT values are the before modification AT of the MDSR-10. 4. Rating Sensitivity - The value at which contact ratings and operating characteristics are determined. Derating may be required below this value. Drop-Out vs. Pull-In Chart Part Numbering System 25 MDSM-10R - 10-15 Max. 20 Series oil) Packaging AT, L4989 C 15 Min. R = Tape aBn =d RBeuelkl Out ( 10 AT Range Drop- 10-25 AT E10xa-1m5p AleT: product in Bulk 10-15 AT packaging is MDSM-10B-10-15 5 15-20 AT 20-25 AT Note: 0 These AT values are the before-modification values of the bare reed switch. 0 5 10 15 20 25 30 35 Pull-In (AT, L4989 Coil) Note: Chart represents the range of Drop-Out, min to max, for a given Pull-in value of the MDSR-10 prior to modification into the MDSM-10. Additional Information Datasheet Resources Samples Packaging Packaging Option Packaging Specification Quantity Quantity and Packaging Code Taping Width Tape and Reel EIA-RS-481-1 3000 R 32mm Bulk N/A 200 B N/A ©© 22001155 LLiitttteellffuussee lliitttteellffuussee..ccoomm SSppeecciifificcaattiioonnss aarree ssuubbjjeecctt ttoo cchhaannggee wwiitthhoouutt nnoottiiccee..

Surface Mount Reed Switches Low Power > MDSM-10 MDSM-10 10.2mm Sub-miniature Surface Mount Reed Switch TAPE DIMENSIONS mm (inch) (.315) (.059 + -.0 0 0 4 ) (.079) 8,00 Ø1,50+ -0 0 ,1 0 2,00 (.069) (.157) 1,75 4,00 7.5° (.240) (.559) 6,10 14,20 (1.118) (1.260) (.670) (.830) 28,40 32,00 17,02 21,08 (.079) (.067 +- .. 00 00 26 ) Ø2,00 Ø1,70+ -0 0, ,01 5 5 (.240) (Ø.015,95 +0 -.0 0+ - 000 4, 1) 0 6,10 (0.0,4116) 7.5° 3.0° 1. ALL TAPE & SPROCKET HOLE DIMENSIONS (.10,7950) (.20,8143) 2 .A ARLEL P PEORC EKIAET-4 D81IM UENNLSEISOSN NSO ATREED ±(.004") 0,10mm (.046) (.111) 3. ALL DIMENSIONS ARE TO INSIDE OF POCKET 1,17 2,82 REEL DIMENSIONS mm (inch) (3.937±.020) (12.992+- . 0. 0 3 10 0 ) 100,0±0,50 330,00+0,25 -0,76 (.075±.016) 1,9±0.4 TYP. (1.512) 38,4 MAX. 120° TYP. (.82Ø72±1.,001±60).4 ((13.22,746 +-+ 0-0 0. 0. 2 0) 8 ) MEASURED AT HUB (.512±.008) Ø13,0±0.2 © 2015 Littelfuse littelfuse.com Specifications are subject to change without notice.

Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: L ittelfuse: MDSM-10B 15-20 MDSM-10B 10-15 MDSM-10R 10-25 MDSM-10R 15-20 MDSM-10R 20-25 MDSM-10B 20-25 MDSM-10R 10-15 MDSM-10B 10-25 MDSM-10R 20-25 AT MDSM-10R-10-15 MDSM-10R-20-25 MDSM-10B-10-15 MDSM-10R-10-25 MDSM-10B-10-25 MDSM-10B-15-20 MDSM-10R-15-20 MDSM-10B-20-25