RI-48 Series Dry Reed Switch RI-48 Series Micro dry-reed switch hermetically sealed in a gas-filled glass envelope. Single-pole, single-throw (SPST) type, having normally open contacts, and containing two magnetically actuated reeds. The switch is of the double-ended type and may be actuated by an electromagnet, a perma- nent magnet or a combination of both. The device is intended for use in relays for switching power loads and high stand-off voltage applications. RI-48 Series Features Perfect heavy load switch Can handle loads up to 70 Watts Contact layers: Gold, sputtered ruthenium Superior glass-to-metal seal and blade alignment Excellent life expectancy and reliability Dimensions in inches (mm) General data for all models RI-48 Loaded conditions (resistive load: 20 V 500 mA AT-Customization / Preformed Leads Besides the standard models, customized products can operating frequency: 125 Hz) also be supplied offering the following options: Operate and release ranges to customer specification RI-48AA Cropped and/or preformed leads 7 Life expectancy: min. 10 operations with a failure rate -8 Coils of less than 10 with a confidence level of 90%. All characteristics are measured using the Philips End of life criteria: Standard Coil. For definitions of the Philips Standard Contact resistance > 2 after 2.5 ms Release time > 2.5 ms (latching or contact sticking). Coil, refer to Application Notes in the Reed Switch Technical & Application Information Section of this RI-48A RI-48B RI-48C catalog. 7 Life expectancy: min. 2.5 x 10 operations with a failure Life expectancy and reliability -8 rate of less than 10 with a confidence level of 90%. The life expectancy data given below are valid for a coil End of life criteria: energized at 1.5 times the published maximum operate Contact resistance > 2 after 2.5 ms value for each type in the RI-48 series. Release time > 2.5 ms (latching or contact sticking). No-load conditions (operating frequency: 100 Hz) Loaded conditions (resistive load: 100 V-700 mA 8 Life expectancy: min. 10 operations with a failure rate operating frequency: 20 Hz) -9 of less than 10 with a confidence level of 90%. RI-48B RI-48C End of life criteria: Contact resistance > 1 after 2 ms 5 Life expectancy: min. 3x10 operations with a failure Release time > 2 ms (latching or contact sticking). -6 rate of less than 10 with a confidence level of 90%. COTO TECHNOLOGY (USA) Tel: (401) 943-2686 / Fax (401) 942-0920 (Europe) Tel: +31-45-5439343 / Fax +31-45-5427216 108RI-48 Series Dry Reed Switch Model Number RI-48A RI-48B RI-48C Parameters Test Conditions Units Operating Characteristics Operate Range AT 15-28 24-51 46-70 Release Range AT 8-20 13-27 18-32 Operate Time - including bounce (typ.) (energization) ms 0.35 (35 AT) 0.35 (64 AT) 0.35 (87.5 AT) Bounce Time (typ.) (energization) ms 0.15 (35 AT) 0.15 (64 AT) 0.15 (87.5 AT) Release Time (max) (energization) s 30 (35 AT) 30 (64 AT) 30 (87.5 AT) Resonant Frequency (typ.) Hz 3200 3200 3200 Electrical Characteristics Switched Power (max) W 70 70 70 Switched Voltage DC (max) V 200 200 200 Switched Voltage AC, RMS value (max) V 250 250 250 Switched Current DC (max) mA 1000 1000 1000 Switched Current AC, RMS value (max) mA 1000 1000 1000 Carry Current DC AC, RMS value (max) A 1.75 2.25 2.25 Breakdown Voltage (min) V 400 580 780 Contact Resistance (initial max) (energization) m 90 (27 AT) 90 (36AT) 90 (36 AT) Contact Resistance (initial typ.) (energization) m 60 (27 AT) 60 (36 AT) 60 (36 AT) Contact Capacitance (max) without test coil pF 0.2 0.2 0.2 6 6 6 10 10 x10 Insulation Resistance (min) RH 45% M End of life criteria: Mechanical Strength Contact resistance > 1.5 after 2.5 ms. The robustness of the terminations is tested in accor- Release time > 2.5 ms (latching or contact sticking). dance with IEC 68-2-21, test Ua (load 40 N). 1 Switching different loads involves different life expect- ancy and reliability data. Further information is avail- Operating and Storage Temperature able on request. Operating ambient temperature min: -55C max: +125C. Storage temperature min: -55C max: Mechanical Data +125C. Note: Temperature excursions up to 150C Contact arrangement is normally open lead finish is may be permissible. For more information contact your tinned net mass is approximately 280 mg and can be nearest Coto Technology sales office. mounted in any position. Soldering Shock The switch can withstand soldering heat in accordance The switches are tested in accordance with IEC 68-2- with IEC 68-2-20, test Tb, method 1B: solder bath at 27, test Ea (peak acceleration 500 G, half sinewave 350 10C for 3.5 0.5 s. Solderability is tested in duration 11 ms). Such a shock will not cause an open accordance with IEC 68-2-20, test Ta, method 3: switch (no magnetic field present) to close, nor a switch solder globule temperature 235C ageing 1b: 4 hours kept closed by an 80 AT coil to open. steam. Vibration Welding The switches are tested in accordance with IEC 68-2- The leads can be welded. 6, test Fc (acceleration 10 G below cross-over fre- quency 57 to 62 Hz amplitude 0.75 mm frequency Mounting range 10 to 2000 Hz, duration 90 minutes). Such a The leads should not be bent closer than 1 mm to the vibration will not cause an open switch (no magnetic glass-to-metal seals. Stress on the seals should be field present) to close, nor a switch kept closed by an avoided. Care must be taken to prevent stray magnetic 80 AT coil to open. fields from influencing the operating and measuring conditions. For Most Recent Data, Consult the Coto Technology Website: www.cotorelay.com E-mail: info cotorelay.com 109