Axial Lead Reed Switches Low Power > MDRR-DT MDRR-DT 14.7mm Miniature Changeover Reed Switch RoHS Description The MDRR-DT Reed Switch is a miniature changeover switch with a 14.73mm long x 2.54mm diameter (0.580 x 0.100) glass envelope, capable of switching 9 175Vdc at 5W. It has insulation resistance of 10 ohms minimum, and contact resistance less than 100 milli-ohms. The MDRR-DT is available in surface mount version, that is, MDSM-DT. Features Miniature SPDT changeover switch Available sensitivity range Capable of switching 175Vdc or 10-30 AT 0.25A at up to 5W Benefits Agency Approvals Hermetically sealed switch Zero operating power required for Agency Agency File Number Ampere-Turns Range contacts are not affected by and contact closure have no effect on their external Excellent for switching E47258 environment microcontroller logic level loads 10-30 AT E471070 Can be used as changeover or normally closed contact Note: Contact Littelfuse for specific agency approval ratings. Applications Dimensions Position Sensing Office Equipments Dimensions in mm (inch) Reed Relays Home Appliances F - Formed CL OF OVERLAP Industrial Controls Security 0.20 (.008) MIN. AT 1.6 FROM SEAL 28.32 REF. 0.55 (.022) MAX. (1.115) 2X0.56 REF. 2.54 MAX. 0.51 REF. Switch Type 4.57 REF. (.022) (.100) (.020) (.180) N.O. COMMON Contact Form C (SPDT-CO) 2.54 REF. (.100) N.C. 14.73 MAX. 17.78 MIN. 1.57 (.062) REF. (.580) (.700) Body: Glass Materials Leads: Tin-plated Ni-Fe wire 51.66 REF. (2.034) Note: SPDT-CO = Single-Pole, Double-Throw, Change Over U - Unformed 52.48 REF. (2.066) 0.80 REF. N.O. (.031) N.C. Electrical Ratings 1 Contact Rating W/VA - max. 5 2 Switching Vdc - max. 175 3 Voltage Vac - max. 120 4 Breakdown Vdc - min. 200 2 Switching Adc - max. 0.25 3 Current Aac - max. 0.18 Carry Adc - max. 1.50 Contact, Initial - max. 0.100 Resistance 9 Insulation - min. 10 Capacitance Contact pF - typ. 1 Operating C -40 to +125 Temperature 5 Storage 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. 2020 Littelfuse Revised: BO.12/08/20 littelfuse.com Specifications are subject to change without notice.Axial Lead Reed Switches Low Power > MDRR-DT MDRR-DT 14.7mm Miniature Changeover Reed Switch Product Characteristics Operating Characteristics 1 Operate Time 0.7ms - max. 1 Release Time 1ms - max. 2 Shock 11ms 12 sine wave 50G - max. 2 Vibration 50-2000 Hertz 30G - max. Resonant Frequency 11.0kHz - typ. Magnetic Characteristics 3 Pull-In Range Ampere Turns 10-30 4 Rating Sensitivity Ampere Turns 20 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 MDRR-DT -15-20 F 20 Max. Series 15 AT Range Min. 10-15 AT 10-20 AT 10 15-20 AT 15-25 AT 15-30 AT 5 20-25 AT 20-30 AT 0 20-35 AT 0 5 10 15 20 25 30 35 25-30 AT Pull-In (AT, L4989 Coil) Note: Chart represents the range of Drop-Out, min to max for a given Pull-In value. Version Example: F = FORMED 15-20 AT product is U = UNFORMED MDRR-DT-15-20-F or MDRR-DT-15-20-U Note: These AT values are the before-modification values of the bare reed switch. Packaging Packaging Option Packaging Specification Quantity Quantity and Packaging Code Taping Width Bulk Bulk 1000 N/A N/A 2020 Littelfuse Revised: BO.12/08/20 littelfuse.com Specifications are subject to change without notice. Drop-Out (AT, L4989 Coil)