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
General data for all models RI-27
AT-Customization / Preformed Leads
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, refer to the
Reed Switch Technical & Application
Information
Section of this catalog.
Life expectancy and reliability
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-27 series.
No-load conditions (operating frequency: 100 Hz)
Life expectancy: min. 10
9
operations with a failure rate
of less than 2x10
-10
with a confidence level of 90%.
Dimensions in inches (mm)
RI-27AAA
Life expectancy: min. 2 x 10
7
operations with a failure
rate of less than 10
-8
with a confidence level of 90%.
End of life criteria:
Contact resistance > 1鈩?after 2.5 ms
Release time > 1 ms (latching or contact sticking).
RI-27AA; RI-27A
Life expectancy: min. 5x10
7
operations with a failure
rate of less than 0.5x10
-8
with a confidence level of
90%.
End of life criteria:
Contact resistance >1鈩?after 2.5 ms
Release time >1 ms (latching or contact sticking).
Loaded conditions (resistive load: 12 V; 4 mA; (15
mA peak); operating frequency: 170 Hz)
RI-27AAA Not applicable.
RI-27AA; RI-27A
End of life criteria:
Contact resistance > 1鈩?after 2 ms
Release time > 2ms (latching or contact sticking).
Loaded conditions (resistive load: 5 V; 100 mA;
operating frequency: 125 Hz)
104
Life expectancy: min. 45 x 10
6
operations (tested up to
50 x 10
6
operations).
COTO TECHNOLOGY (USA)
Tel:
(401) 943-2686 / Fax (401) 942-0920
6
(Europe) Tel: +31-45-5439343 / Fax +31-45-5427216
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