Axial Lead Reed Switches High Power > MRPR-20 MRPR-20 20.3mm Miniature High Voltage and High Power Reed Switch RoHS Description The MRPR-20 Reed Switch is a miniature, normally open switch with a 20.32mm long x 2.84mm diameter (0.800” x 0.112”) glass envelope, capable of high voltage and power switching of 265Vac at 50VA. The MRPR-20 has high insulation resistance of 1010 ohms minimum and contact resistance less than 100 milli-ohms. Features • Available sensitivity range 17-43 AT • Miniature normally open switch • Capable of switching 265Vac or 1.5A at up to 50W/VA • Minimum breakdown voltage 750Vdc Agency Approvals Agency Agency File Number Ampere-Turns Range E47258 17-43 AT Benefits • Zero operating power required for contact • High voltage and power switching with a miniature switch • Hermetically sealed switch contacts are not affected by and have no effect on their external environment Note: Contact Littelfuse for specific agency approval ratings. Applications Dimensions • Reed relays (suitable for switching global mains voltage) • Limit switching Dimensions in mm (inch) 0.63 (.025) DIA. REF. CL OF OVERLAP Switch Type 28.32 (1.115) REF. 2.84 (.112) MAX. 18.16 (.715) MAX. • Telecom line switching • Heavy Load Switching 20.32 (.800) MAX. Contact Form A (SPST-NO) Materials Body: Glass Leads: Tin-plated Ni-Fe wire Note: SPST-NO = Single-pole, single-throw, normally open 56.64 (2.230) NOM. Electrical Ratings Contact Rating W/VA - max. 50 Vdc - max. Vac - max. Vdc - min. 250 265 750 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 -20 to +125 -65 to +125 Voltage Current 1 3 Switching 2 Breakdown 3 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. © 2016 Littelfuse Revised: 04/26/16 Specifications are subject to change without notice. littelfuse.com Axial Lead Reed Switches High Power > MRPR-20 MRPR-20 20.3mm Miniature High Voltage and High Power 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 17-43 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 40 MRPR-20 - 17-28 35 Drop-Out (AT, L4989 Coil) 30 25 Series Max. 20 15 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. AT Range 17-43 AT 17-23 AT 17-28 AT 22-33 AT 27-33 AT 27-38 AT 32-38 AT 32-43 AT 37-43 AT Example: 17-28 AT product is MRPR-20-17-28 Note: These AT values are the before-modification values of the bare reed switch. Packaging Packaging Option Packaging Specification Bulk © 2016 Littelfuse Revised: 04/26/16 Specifications are subject to change without notice. Bulk Quantity 1000 Quantity & Packaging Code N/A Taping Width N/A littelfuse.com