RI-27 Series Dry Reed Switch RI-27 Series Pico dry-reed switch hermetically sealed in a gas-filled glass envelope. Single-pole, single-throw (SPST) type, having normally open con- tacts, and containing two magnetically actuated reeds. The switch is of the double-ended type and may be actuated by an electromagnet, a permanent magnet or a combination of both. The device is intended for use in relays, sensors, pulse counters or similar devices. RI-27 Series Features Ideal for ATE switching 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-27 AT-Customization / Preformed Leads RI-27AAA 7 Besides the standard models, customized products can Life expectancy: min. 2 x 10 operations with a failure -8 also be supplied offering the following options: rate of less than 10 with a confidence level of 90%. Operate and release ranges to customer specification Cropped and/or preformed leads End of life criteria: Contact resistance > 1 after 2.5 ms Release time > 1 ms (latching or contact sticking). Coils All characteristics are measured using the Philips Standard Coil. For definitions of the Philips Standard RI-27AA RI-27A 7 Coil, refer to the Reed Switch Technical & Application Life expectancy: min. 5x10 operations with a failure -8 Information Section of this catalog. rate of less than 0.5x10 with a confidence level of 90%. Life expectancy and reliability End of life criteria: The life expectancy data given below are valid for a coil Contact resistance >1 after 2.5 ms energized at 1.25 times the published maximum operate Release time >1 ms (latching or contact sticking). value for each type in the RI-27 series. Loaded conditions (resistive load: 12 V 4 mA (15 No-load conditions (operating frequency: 100 Hz) 9 mA peak) operating frequency: 170 Hz) Life expectancy: min. 10 operations with a failure rate -10 of less than 2x10 with a confidence level of 90%. RI-27AAA Not applicable. End of life criteria: RI-27AA RI-27A Contact resistance > 1 after 2 ms 6 Release time > 2ms (latching or contact sticking). Life expectancy: min. 45 x 10 operations (tested up to 6 50 x 10 operations). Loaded conditions (resistive load: 5 V 100 mA operating frequency: 125 Hz) COTO TECHNOLOGY (USA) Tel: (401) 943-2686 / Fax (401) 942-0920 (Europe) Tel: +31-45-5439343 / Fax +31-45-5427216 94RI-27 Series Dry Reed Switch Model Number RI-27AAA RI-27AA RI-27A Parameters Test Conditions Units Operating Characteristics Operate Range AT 10-19 16-25 20-34 Release Range AT 4-16 5-18 7-19.5 Operate Time - including bounce (typ.) (energization) ms 0.25 (24 AT) 0.25 (31 AT) 0.25 (42.5 AT) Bounce Time (typ.) (energization) ms 0.05 (24 AT) 0.05 (31 AT) 0.05 (42.5 AT) Release Time (max) (energization) s 30 (24 AT) 30 (31 AT) 30 (42.5 AT) Resonant Frequency (typ.) Hz 6700 6700 6700 Electrical Characteristics Switched Power (max) W 10 10 10 Switched Voltage DC (max) V 180 200 200 Switched Voltage AC, RMS value (max) V 130 140 140 Switched Current DC (max) mA 500 500 500 Switched Current AC, RMS value (max) mA 500 500 500 Carry Current DC AC, RMS value (max) A 1.5 1.75 1.75 Breakdown Voltage (min) V 180 240 280 Contact Resistance (initial max) (energization) m 115 (20 AT) 115 (25 AT) 115 (25 AT) Contact Resistance (initial typ.) (energization) m 90 (20 AT) 90 (25 AT) 90 (25 AT) Contact Capacitance (max) without test coil pF 0.3 0.3 0.25 6 6 6 10 10 10 RH 45% M Insulation Resistance (min) End of life criteria: Mechanical Strength Contact resistance > 2 after 4 ms The robustness of the terminations is tested in accor- Release time > 0.7 ms (latching or contact sticking). dance with IEC 68-2-21, test Ua (load 10 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. Mechanical Data Storage temperature min: -55C max: +125C. Contact arrangement is normally open lead finish is Note: Temperature excursions up to 150C may be tinned net mass is approximately 100 mg and can be permissible. For more information contact your nearest mounted in any position. Coto Technology sales office. Shock Soldering RI-27AA RI-27A 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 150 G, half sinewave 350 10 C 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 95