RI-02 Series Dry Reed Switch
RI-02 Series
Ultra-miniature dry-reed switch hermetically sealed in a gas-
filled 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-02 Series Features
Ideal for General Purpose reed relays and sensors
Contact layers: ruthenium on gold
Superior glass-to-metal seal and blade alignment
General data for all models RI-02
AT-Customization / Preformed Leads
Dimensions in inches (mm)
Loaded conditions (resistive load: 5V; 100 mA;
operating frequency: 125 Hz)
Life expectancy: min. 2 x 10
6
operations with a failure
rate of less than 10
-8
with a confidence level of 90%.
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 “Application
Notes”
in 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-02 series.
No-load conditions (operating frequency: 100 Hz)
Life expectancy: min.10
8
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
Release time > 2ms (latching or contact sticking).
122
End of life criteria:
Contact resistance > 1
Ω
after 2.5 ms
Release time > 1 ms (latching or contact sticking).
Loaded conditions (resistive load: 20V; 500 mA;
operating frequency: 125 Hz)
Life expectancy: min. 2 x 10
6
operations with a failure
rate of < 10
-7
with a confidence level of 90%.
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.
COTO TECHNOLOGY (USA)
Tel:
(401) 943-2686 / Fax (401) 942-0920
6
(Europe) Tel: +31-45-5439343 / Fax +31-45-5427216
RI-02 Series Dry Reed Switch
Mechanical Data
Contact arrangement is normally open; lead finish is
tinned; net mass is approximately 90mg; and can be
mounted in any position.
Shock
The switches are tested in accordance with “IEC 68-2-
27”, test Ea (peak acceleration 150 G, half sinewave;
duration 11 ms). Such a shock will not cause an open
switch (no magnetic field present) to close nor a switch
kept closed by an 80 AT coil to open.
Vibration
The switches are tested in accordance with “IEC 68-2-
26”, test Fc (acceleration 10G; below cross-over fre-
quency 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.
Mechanical Strength
The robustness of the terminations is tested in accor-
dance with “IEC 68-2-21”, test Ua
1
(load 10 N).
Operating and Storage Temperature
Operating ambient temperature; min: -55°C;
max: +125°C. Storage temperature; min: -55°C; max:
+125°C.
Note:
Temperature excursions up to 150°C
may be permissible. For more information contact your
nearest Coto Technology sales office.
Soldering
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 235°C; ageing 1b: 4 hours
steam.
Welding
The leads can be welded.
Mounting
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
For Most Recent Data, Consult the Coto Technology Website:
www.cotorelay.com
E-mail: sales@cotorelay.com
123
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