Surface Mount Reed Switches Low Power MISM-7

Surface Mount Reed Switches Low Power > MISM-7 MISM-7 7mm Surface Mount Reed Switch RoHS Description The MISM-7 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-7. It has a high insulation resistance of 1012 Ohms minimum and a contact resistance of less than 100 milliohms. Features • Ultra-miniature surface mount • Capable of switching 170 Vdc or normally open switch 0.25A up to 10W Agency Approvals • Available sensitivity range 6-10 AT Agency Agency File Number Ampere-Turns Range Benefits E47258 • Hermetically sealed switch • Excellent for switching E471070 6 - 20AT contacts are not effected by and microcontroller logic level loads have no effect on their external • Very low space requirement DEMKO 14 ATEX 1393U 6 - 20 AT environment • Zero operating power required for contact closure Dimensions Dimensions in mm Applications Ø1.80 MAX • Position Sensing • Security 2x0.84±0.10 (.071) (.033±004) • Level Sensing • Office Equipment • Meter Equipment 7.00 MAX RECOMMENDED LAND PATTERN (.276) 2x1.12 (044) 2x3.25 (.128) Switch Type 2.28 MAX (.090) Contact Form A (SPST-NO) 0.02 MIN 8.61 (.001) (.339) Body: Glass 9.91±0.25 Materials Leads: Tin-plated Ni-Fe wire (.390±010) 13.72±0.25 Note: Land pattern is Littelfuse recommendation Note: SPST-NO = Single-pole, single-throw, normally open (.540±010) only. User is responsible for proper PCB design. Electrical Ratings Contact Rating 1 W/VA - max. 10 Switching 2 Vdc - max. 170 Voltage 3 Vac - max. 120 Breakdown 4 Vdc - min. 175 Switching 2 Adc - max. 0.25 Current 3 Aac - max. 0.18 Carry Adc - max. 0.50 Resistance Contact, Initial Ω - max. 0.150 Insulation Ω - min. 1012 Capacitance Contact pF - typ. 0.3 Temperature Operating °C -40 to +125 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 Revised: 11/02/15 littelfuse.com Specifications are subject to change without notice.

Surface Mount Reed Switches Low Power > MISM-7 MISM-7 7mm Surface Mount Reed Switch Product Characteristics Operating Characteristics Operate Time 1 0.45ms - max. Release Time 1 0.20ms - max. Shock 2 11ms 1∕2 sine wave 150G - max. Vibration 2 50-2000 Hertz 30G - max. Resonant Frequency 10.0kHz - typ. Magnetic Characteristics Pull-In Range 3 Ampere Turns 6-10, 10-15, 15-20 Rating Sensitivity 4 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 20 Max. MISM-7 R - 6-10 17.5 15 Min. 12.5 Series Packaging 10 R = Tape and Reel B = Bulk 7.5 AT Range 6-10 AT Example: 5 10-15 AT 6-10 AT product is 15-20 AT MISM-7R-6-10 2.5 Note: These AT values are the before-modification values of the bare reed switch. 0 0 2.5 5 7.5 10 12.5 15 17.5 20 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 Packaging Specification Quantity Quantity and Packaging Code Taping Width Tape and Reel EIA-RS-481-1 3000 R 32mm © 2015 Littelfuse Revised: 11/02/15 littelfuse.com Specifications are subject to change without notice. Drop-Out (AT, L4991 Coil)

Surface Mount Reed Switches Low Power > MISM-7 MISM-7 7mm Surface Mount Reed Switch TAPE DIMENSIONS mm (inch) REEL DIMENSIONS mm (inch) © 2015 Littelfuse Revised: 11/02/15 littelfuse.com Specifications are subject to change without notice.