Axial Lead Reed Switches High Voltage > MVSR-20 MVSR-20 19.7mm Reed Switch RoHS Description A RY The MVSR-20 reed switch is a miniature, normally open switch with a 19.69mm long x 2.66mm diameter (0.775” x 0.105”) glass envelope, capable of high voltage switching of up to 1kVdc at 1mA. It has high insulation resistance of 10¹² ohms minimum and contact resistance less than 100 milli-ohms. Features • Miniature normally open switch • Capable of switching 1000Vdc at 1mA or 0.5A up to 10W • Minimum voltage breakdown 2000 Vdc • Available sensitivity range 17-38 AT Benefits Agency Approvals Agency File Number Ampere-Turns Range Pending 17-38 AT Applications Pending 17-38 AT • Reed relays (particularly suitable for high voltage breakdown applications) • Security Note: Contact Littelfuse for specific agency approval ratings. Dimensions IN Agency • Zero operating power required for contact closure • Hermetically sealed switch contacts are not affected by and have no effect on their external environment • Limit switching • Telecoms line switching • Industrial equipment EL IM Switch Type Dimensions in mm (inch) CL OF OVERLAP (1.117) REF. 28.37 (.105) MAX. 2.66 (.022) DIA. REF. 0.55 Contact Form A (SPST-NO) Materials Body: Glass Leads: Tin-plated Ni-Fe wire Note: SPST-NO = Single-pole, single-throw, normally open (.685) MIN. 17.39 (.775) MAX. 19.69 (2.235) NOM. 56.77 Electrical Ratings Contact Rating 3 PR Voltage 1 Current 3 Switching 2 Breakdown 4 Switching Carry 2 W/VA - max. 10 Vdc - max. Vdc - min. 1000 2000 Adc - max. Adc - max. 0.50 1.30 Resistance Contact, Initial Insulation Ω - max. Ω - min. 0.100 1012 Capacitance Contact pF - typ. 0.2 Temperature Operating Storage 5 °C °C -75 to +125 -75 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. © 2017 Littelfuse Revised: 07/18/17 Specifications are subject to change without notice. littelfuse.com Axial Lead Reed Switches High Voltage > MVSR-20 MVSR-20 19.7mm Reed Switch Product Characteristics Operating Characteristics Operate Time 1 0.75ms - max. Release Time 1 0.30ms - max. 11ms 1∕2 sine wave 2 Vibration 100G - max. RY Shock 50-2000 Hertz 2 30G - max. Resonant Frequency 3.2kHz - typ. Magnetic Characteristics Ampere Turns 3 Rating Sensitivity 17-38 Ampere Turns 4 35 A Pull-In Range Test Coil L4989 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. IN Notes: 1. Operate (including bounce)/Release Time - per EIA/NARM RS-421-A,diode suppressed coil (Coil II). 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 IM 30 MVSR-20-22-28 Max. 20 Min. 15 PR EL Drop-Out (AT, L4989 Coil) 25 10 5 0 0 5 10 15 20 25 30 35 40 Series AT Range 17-23 AT 17-28 AT 22-28 AT 22-33 AT 27-33 AT 27-38 AT 32-38 AT Example: 22-28 AT product is MVSR-20-22-28 Note: These AT values are the before-modification values of the bare reed switch. Pull-In (AT, L4989 Coil) Note: Chart represents the range of Drop Out, min to max for a given Pull-In value. Packaging Packaging Option Packaging Specification Bulk © 2017 Littelfuse Revised: 07/18/17 Specifications are subject to change without notice. Bulk Quantity 1000 Quantity & Packaging Code N/A Taping Width N/A littelfuse.com Surface Mount Reed Switches Low Power > MASM-14 © 2017 Littelfuse Revised: 07/18/17 Specifications are subject to change without notice. littelfuse.com