Surface Mount Reed Switches Low Power > MISM-3V1 MISM-3V1 7mm Surface Mount Reed Switch RoHS Description The MISM-3V1 surface mount reed switch is a sub-miniature, normally open switch with a 7mm long x 1.8mm diameter (0.276” x 0.071”) glass envelope, capable of switching up to 0.25 Amps. This reed switch is a surface mount version of the MITI-3V1. It has a high insulation resistance of 1012 Ohms minimum and a contact resistance of less than 100 milliohms. Features • Ultra-miniature surface mount normally open switch • Available sensitivity range 6-10 AT Agency Approvals Agency Agency File Number Ampere-Turns Range E47258 E471070 6-10AT DEMKO 14 ATEX 1393U 6-10 AT Benefits • Hermetically sealed switch contacts are not effected by and have no effect on their external environment • Zero operating power required for contact closure Dimensions • Capable of switching 170 Vdc or 0.25A up to 10W • Excellent for switching microcontroller logic level loads • Very low space requirement Applications Dimensions in mm Ø1.80 MAX (.071) • Position Sensing • Level Sensing • Meter Equipment 2x0.84±0.10 (.033±004) 7.00 MAX (.276) 2.28 MAX (.090) RECOMMENDED LAND PATTERN 2x1.12 (044) 2x3.25 (.128) 0.02 MIN (.001) 9.91±0.25 (.390±010) 8.61 (.339) Note: Land pattern is Littelfuse recommendation only. User is responsible for proper PCB design. 13.72±0.25 (.540±010) • Security • Office Equipment Switch Type 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. 170 120 175 Carry Adc - max. Aac - max. Adc - max. 0.25 0.18 0.50 Contact, Initial Insulation Ω - max. Ω - min. 0.150 1012 Capacitance Contact pF - typ. 0.3 Temperature Operating Storage 5 °C °C -40 to +125 -65 to +125 Voltage Current 1 3 Switching 2 Breakdown 3 Resistance 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 Surface Mount Reed Switches Low Power > MISM-3V1 MISM-3V1 7mm Surface Mount Reed Switch Product Characteristics Operating Characteristics Operate Time 1 0.45ms - max. Release Time 1 0.20ms - max. Shock 11ms 1∕2 sine wave 2 Vibration 150G - max. 50-2000 Hertz 2 30G - max. Resonant Frequency 18.0kHz - typ. Magnetic Characteristics Pull-In Range 3 Rating Sensitivity 4 Ampere Turns 6-10 Ampere Turns 10 Test Coil L4991 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 MITI-3V1. 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 MISM-3V1R - 6-10 15 Drop-Out (AT, L4991 Coil) 12.5 Series 10 Packaging R = Tape and Reel B = Bulk Max. 7.5 Min. 5 AT Range 6-10 AT 2.5 0 0 2.5 5 7.5 10 12.5 15 Example: 6-10 AT product is MISM-3V1R-6-10 Note: This AT value is the before-modification value of the bare reed switch. Pull-In (AT, L4991 Coil) Note: Chart represents the range of Drop-Out, min to max for a given Pull-In value. Packaging Packaging Option Tape and Reel Packaging Specification EIA-RS-481-1 © 2015 Littelfuse Specifications are subject to change without notice. Quantity 3000 Quantity and Packaging Code R Taping Width 32mm littelfuse.com Surface Mount Reed Switches Low Power > MISM-3V1 MISM-3V1 7mm Surface Mount Reed Switch TAPE DIMENSIONS mm (inch) REEL DIMENSIONS mm (inch) © 2015 Littelfuse Specifications are subject to change without notice. littelfuse.com