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 to 200Vdc at 50W. The MRPR-3 has high insulation resistance of 1010 ohms minimum and contact resistance less than 100 milli-ohms. Features • Miniature normally open switch • Switch contacts capable of switching 200Vdc or 1.5A at up to 50W. Agency Approvals Benefits Agency File Number Ampere-Turns Range E47258 E471070 22-43 AT • Hermetically sealed switch contacts are not affected by and have no effect on their external environment DEMKO 14 ATEX 1393U 22-43 AT Applications Agency • Limit Switching • Telephone Line Switching • Office Equipments Dimensions Dimensions in mm (inch) 0.63 (.025) DIA. REF. CL OF OVERLAP • Zero operating power required for contact • Power switching with a miniature switch • Heavy Load Switching • Light Inductive Loads Switch Type 28.32 (1.115) REF. 2.84 (.112) MAX. 13.16 (.715) MAX. • Available sensitivity range 22-43 AT Contact Form A (SPST-NO) Materials Body: Glass Leads: Tin-plated Ni-Fe wire Note: SPST-NO = Single-pole, single-throw, normally open 19.69 (.775) MAX. 56.64 (2.230) NOM. Electrical Ratings Contact Rating W/VA - max. 50 Vdc - max. Vac - max. Vdc - min. 200 140 300 Carry Adc - max. Aac - max. Adc - max. 1.5 1.1 3.0 Contact, Initial Insulation Ω - max. Ω - min. 0.100 1010 Capacitance Contact pF - typ. 0.2 Temperature Operating Storage 5 °C °C -40 to +125 -65 to +125 Voltage 3 Current 3 1 Switching 2 Breakdown 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 Axial Lead Reed Switches Low Power > MRPR-3 MRPR-3 19.7mm Miniature Reed Switch Product Characteristics Operating Characteristics Operate Time 1 0.75ms - max. Release Time 1 0.3ms - max. Shock 2 Vibration 11ms 1∕2 sine wave 100G - max. 50-2000 Hertz 30G - max. 2 Resonant Frequency 2.1kHz - typ. Magnetic Characteristics Pull-In Range 3 Rating Sensitivity 4 Ampere Turns 22-43 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 MRPR-3-22-28 25 Max. Drop-Out (AT, L4989 Coil) 20 15 Series Min. 10 5 0 0 5 10 15 20 25 30 35 40 45 50 Pull-In (AT, L4989 Coil) Note: Chart represents the range of Drop-Out, min to max for a given Pull-In value. Example: 22-28 AT product is MRPR-3-22-28 Note: These AT values are the before-modification values of the bare reed switch. Additional Information Datasheet AT Range 22-28 AT 22-33 AT 27-33 AT 27-38 AT 32-38 AT 32-43 AT 37-43 AT Samples Resources Packaging Packaging Option Packaging Specification Bulk © 2015 Littelfuse Specifications are subject to change without notice. Bulk Quantity 1000 Quantity & Packaging Code N/A Taping Width N/A littelfuse.com