Reed Switches Datasheet Axial Lead Reed Switches 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 10 insulation resistance of 10 ohms minimum and contact resistance less than 100 milli-ohms. Features & Benefits Miniature normally open Approved to EN 60079-0 and switch EN 60079-15. Capable of switching 265Vac Hermetically sealed switch or 1.5A at up to 50W/VA contacts are not affected by and have no effect on their Minimum breakdown voltage external environment 750Vdc Zero operating power Available sensitivity range required 17-43 AT for contact UL Recognized to UL 121201, Agency Approvals High voltage and power UL 60079-0, UL 60079-15, switching with a miniature C22.2 No. 213-17, C22.2 Agency Agency File Number Ampere-Turns Range switch No. 60079-0 and C22.2 No. 60079-15. E47258, E471070 17-43 AT Note: Contact Littelfuse for specific agency approval ratings. Applications Dimensions Reed relays (suitable for Dimensions in mm (inch) Telecom line switching switching global mains 0.63 Heavy Load Switching (.025) DIA. REF. voltage) CL OF OVERLAP 28.32 Limit switching (1.115) REF. 2.84 (.112) MAX. Switch Type Contact Form A (SPST-NO) 18.16 20.32 Body: Glass Materials (.715) MIN. (.800) MAX. Leads: Tin-plated Ni-Fe wire 56.64 Note: SPST-NO = Single-pole, single-throw, normally open (2.230) NOM. Electrical Ratings 1 Contact Rating W/VA - max. 50 2 Switching Vdc - max. 250 3 Voltage Vac - max. 265 4 Breakdown Vdc - min. 750 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 -20 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. 2021 Littelfuse, Inc. 1 Specifications are subject to change without notice. Revised: GD. 09/22/21Reed Switches Datasheet Axial Lead Reed Switches MRPR-20 20.3mm Miniature High Voltage and High Power 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 17-43 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 40 MRPR-20 - 17-28 35 30 25 Max. Series 20 AT Range 15 17-43 AT Example: Min. 17-23 AT 17-28 AT product is 10 17-28 AT MRPR-20-17-28 22-33 AT 5 27-33 AT 0 27-38 AT 05 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. Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width Bulk Bulk 1000 N/A N/A Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at www.littelfuse.com/disclaimer-electronics. 2021 Littelfuse, Inc. 2 Specifications are subject to change without notice. Revised: GD. 09/22/21 Drop-Out (AT, L4989 Coil)