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RI-70 Series Dry Reed Switch
RI-70 Series Ultra-miniature 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 permanent magnet or a combination of both. The device is intended for use in relays, sensors, pulse counters or similar devices.
RI-70 Series Features Ideal for ATE switching 7 mm glass length 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-70
AT-Customization / Preformed Leads
Release time > 2ms (latching or contact sticking).
Loaded conditions (resistive load: 5 V; 100 mA; operating frequency: 125 Hz)
Besides the standard models, customized products can also be supplied offering the following options: ! Operate and release ranges to customer specification ! Cropped and/or preformed leads
Coils
All characteristics are measured using the Philips Standard Coil. For definitions of the Philips Standard Coil, see Reed Switch Technical & Application Information Section of this catalog.
Life expectancy and reliability
Life expectancy: min. 2 x 107 operations with a failure rate of less than 10-8 with a confidence level of 90%. End of life criteria: Contact resistance > 1 after 2.5 ms Release time > 1 ms (latching or contact sticking).
Loaded conditions (resistive load: 20 V; 500 mA; operating frequency: 125 Hz)
The life expectancy data given below are valid for a coil energized at 1.25 times the published maximum operate value for each type in the RI-70 series.
No-load conditions (operating frequency: 100 Hz)
Life expectancy: min. 5 x 106 operations with a failure rate of <0.5 x 107 with a confidence level of 90%. End of life criteria: Contact resistance > 2 after 2.5 ms Release time > 2.5 ms (latching or contact sticking). Switching different loads involves different life expectancy and reliability data. Further information is available on request.
6 (Europe) Tel: +31-45-5439343 / Fax +31-45-5427216
Life expectancy: min. 109 operations with a failure rate of less than 2 x10-10 with a confidence level of 90%. End of life criteria: Contact resistance > 1 after 2 ms
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COTO TECHNOLOGY (USA) Tel: (401) 943-2686 / Fax (401) 942-0920
RI-70 Series Dry Reed Switch
Mechanical Data
Contact arrangement is normally open; lead finish is tinned; net mass is approximately 70 mg; and can be mounted in any position.
Shock
Operating and Storage Temperature Operating ambient temperature; min: -55C; max: +125C. Storage temperature; min: -55C; max: + 125C. Note: Temperature excursions up to 150C may be permissible. For more information contact your nearest Coto Technology sales office.
Soldering
The switches are tested in accordance with "IEC 68-227", test Ea (peak acceleration 100 G, half sinewave; duration 11 ms). Such a shock will not cause an open switch (no magnetic field present) to close.
Vibration
The switches are tested in accordance with "IEC 68-226", test Fc (acceleration 10G; below cross-over frequency 57 to 62 Hz; amplitude 0.75 mm; frequency range 10 to 2000 Hz; duration 90 minutes.) Such a vibration will not cause an open switch (no magnetic field present) to close, nor a switch kept closed by an 80 AT coil to open.
The switch can withstand soldering heat in accordance with "IEC 68-2-20", test Tb, method 1B: solder bath at 350 10 C for 3.5 0.5 s. Solderability is tested in accordance with "IEC 68-2-20" test Ta, method 3: solder globule temperature 235C; ageing 1b: 4 hours steam.
Welding
The leads can be welded.
Mounting
Mechanical Strength
The robustness of the terminations is tested in accordance with "IEC 68-2-21", test Ua1 (load 10 N).
The leads should not be bent closer than 1 mm to the glass-to-metal seals. Stress on the seals should be avoided. Care must be taken to prevent stray magnetic fields from influencing the operating and measuring conditions.
6 E-mail: sales@cotorelay.com
For Most Recent Data, Consult the Coto Technology Website: www.cotorelay.com
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