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 12 resistance of 10 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 Available sensitivity range 6-10 AT Agency Approvals Agency Agency File Number Ampere-Turns Range Benefits Excellent for switching Hermetically sealed switch E47258 6 - 20AT microcontroller logic level loads contacts are not effected by and E471070 Very low space requirement have no effect on their external environment DEMKO 14 ATEX 1393U 6 - 20 AT Zero operating power required for contact closure Dimensions Applications Dimensions in mm Position Sensing Security 1.80 MAX 2x0.840.10 (.071) Level Sensing Office Equipment (.033004) Meter Equipment 7.00 MAX RECOMMENDED LAND PATTERN 2x1.12 (044) (.276) Switch Type 2x3.25 (.128) 2.28 MAX (.090) Contact Form A (SPST-NO) 8.61 0.02 MIN (.339) (.001) Body: Glass Materials 9.910.25 Leads: Tin-plated Ni-Fe wire (.390010) Note: Land pattern is Littelfuse recommendation 13.720.25 Note: SPST-NO = Single-pole, single-throw, normally open only. User is responsible for proper PCB design. (.540010) Electrical Ratings 1 Contact Rating W/VA - max. 10 2 Switching Vdc - max. 170 3 Voltage Vac - max. 120 4 Breakdown Vdc - min. 175 2 Switching Adc - max. 0.25 3 Current Aac - max. 0.18 Carry Adc - max. 0.50 Contact, Initial - max. 0.150 Resistance 12 Insulation - min. 10 Capacitance Contact pF - typ. 0.3 Operating C -40 to +125 Temperature 5 C -65 to +125 Storage 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 1 Operate Time 0.45ms - max. 1 Release Time 0.20ms - max. 2 Shock 11ms 12 sine wave 150G - max. 2 Vibration 50-2000 Hertz 30G - max. Resonant Frequency 10.0kHz - typ. Magnetic Characteristics 3 Pull-In Range Ampere Turns 6-10, 10-15, 15-20 4 Rating Sensitivity 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. Series 12.5 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 02.5 57.5 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)