Axial Lead Reed Switches Low Power > MRPR-8 MRPR-8 20.3mm Miniature High Voltage Reed Switch RoHS Description The MRPR-8 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-8 has high insulation resistance of 1010 ohms minimum and contact resistance less than 100 milli-ohms. Features * Available sensitivity range 22-43 AT * Miniature normally open switch * Capable of switching 265Vac or 1.0A at up to 50W/VA * Minimum voltage breakdown 750Vdc Benefits Agency Approvals Agency Agency File Number Ampere-Turns Range E47258 E471070 22-43 AT DEMKO 14 ATEX 1393U 22-43 AT * Zero operating power required for contact * Hermetically sealed switch contacts are not affected by and have no effect on their external environment Applications * Reed relays (suitable for switching European mains voltage) * Limit switching Dimensions 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. * Telecoms line switching * White goods applications * European mains voltage 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. 1.0 0.7 2.5 Resistance Contact, Initial Insulation - max. - 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 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. (c) 2015 Littelfuse Specifications are subject to change without notice. littelfuse.com Axial Lead Reed Switches Low Power > MRPR-8 MRPR-8 20.3mm Miniature High Voltage Reed Switch Product Characteristics Operating Characteristics Operate Time 1 0.75ms - max. Release Time 1 0.3ms - max. Shock 2 Vibration 11ms 12 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 40 MRPR-8-22-28 35 Drop-Out (AT, L4989 Coil) 30 25 Max. Series 20 Min. 15 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 22-43 AT 22-28 AT 22-33 AT 27-33 AT 27-38 AT 32-38 AT 32-43 AT 37-43 AT Example: 22-28 AT product is MRPR-8-22-28 Note: These AT values are the before-modification values of the bare reed switch. Additional Information Datasheet Samples Resources Packaging Packaging Option Packaging Specification Bulk (c) 2015 Littelfuse Specifications are subject to change without notice. Bulk Quantity 1000 Quantity & Packaging Code N/A Taping Width N/A littelfuse.com