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
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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).
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
Loaded conditions (resistive load: 5 V; 100 mA;
operating frequency: 125 Hz)
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:
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.
Contact resistance > 1Ω after 2.5 ms
Release time > 1 ms (latching or contact sticking).
Loaded conditions (resistive load: 20 V; 500 mA;
operating frequency: 125 Hz)
Life expectancy and reliability
Life expectancy: min. 5 x 106 operations with a failure
rate of <0.5 x 107 with a confidence level of 90%.
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.
End of life criteria:
Contact resistance > 2Ω after 2.5 ms
Release time > 2.5 ms (latching or contact sticking).
Switching different loads involves different life expect-
ancy and reliability data. Further information is avail-
able on request.
No-load conditions (operating frequency: 100 Hz)
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 > 1Ω after 2 ms
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