Axial Lead Reed Switches Low Power > MRPR-3 MRPR-3 19.7mm Miniature Reed Switch RoHS Description The MRPR-3 Reed Switch is a miniature, normally open switch with a 19.69mm long x 2.84mm diameter (0.770 x .112) glass envelope, capable of switching up 10 to 200Vdc at 50W. The MRPR-3 has high insulation resistance of 10 ohms minimum and contact resistance less than 100 milli-ohms. Features Available sensitivity range Miniature normally open switch 22-43 AT Switch contacts capable of switching 200Vdc or 1.5A at up to 50W. Agency Approvals Benefits Hermetically sealed switch Zero operating power required Agency Agency File Number Ampere-Turns Range contacts are not affected by and for contact have no effect on their external Power switching with a E47258 environment miniature switch 22-43 AT E471070 Applications DEMKO 14 ATEX 1393U 22-43 AT Limit Switching Heavy Load Switching Telephone Line Switching Light Inductive Loads Office Equipments Dimensions Dimensions in mm (inch) 0.63 (.025) DIA. REF. Switch Type CL OF OVERLAP 28.32 (1.115) REF. Contact Form A (SPST-NO) 2.84 (.112) MAX. Body: Glass Materials Leads: Tin-plated Ni-Fe wire Note: SPST-NO = Single-pole, single-throw, normally open 13.16 19.69 (.715) MAX. (.775) MAX. 56.64 (2.230) NOM. Electrical Ratings 1 Contact Rating W/VA - max. 50 2 Switching Vdc - max. 200 3 Voltage Vac - max. 140 4 Breakdown Vdc - min. 300 2 Switching Adc - max. 1.5 3 Current Aac - max. 1.1 Carry Adc - max. 3.0 Contact, Initial - max. 0.100 Resistance 10 Insulation - min. 10 Capacitance Contact pF - typ. 0.2 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 2015 Littelfuse littelfuse.com Specifications are subject to change without notice.Axial Lead Reed Switches Low Power > MRPR-3 MRPR-3 19.7mm Miniature Reed Switch Product Characteristics Operating Characteristics 1 Operate Time 0.75ms - max. 1 Release Time 0.3ms - max. 2 Shock 11ms 12 sine wave 100G - max. 2 Vibration 50-2000 Hertz 30G - max. Resonant Frequency 2.1kHz - typ. Magnetic Characteristics 3 Pull-In Range Ampere Turns 22-43 4 Rating Sensitivity Ampere Turns 22 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 MRPR-3-22-28 Max. 20 15 Min. Series 10 AT Range 22-28 AT Example: 5 22-33 AT 22-28 AT product is 27-33 AT MRPR-3-22-28 27-38 AT 0 0 5 10 15 20 25 30 35 40 45 50 32-38 AT Pull-In (AT, L4989 Coil) 32-43 AT Note: Chart represents the range of Drop-Out, min to max for a given Pull-In value. 37-43 AT Note: These AT values are the before-modification values of the bare reed switch. Additional Information Datasheet Resources Samples Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width Bulk Bulk 1000 N/A N/A 2015 Littelfuse 2015 Littelfuse littelfuse.comlittelfuse.com Specifications are subject to change without notice.Specifications are subject to change without notice. Drop-Out (AT, L4989 Coil)