RI-46 Series Dry Reed Switch
RI-46 Series
Micro dry-reed switch hermetically sealed in a gas-filled glass enve-
lope. 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 electromag-
net, a permanent magnet or a combination of both.
The device is intended for use in relays, sensors, pulse counters or
similar devices.
RI-46 Series Features
Can switch main voltage
Can handle up to 40 W load
Contact layers: gold, sputtered ruthenium
Superior glass-to-metal seal and blade alignment
Excellent life expectancy and reliability
General data for all models RI-46
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 “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 1.5 times the published maximum operate
value for each type in the RI-46 series.
No-load conditions (operating frequency: 100 Hz)
Life expectancy: min. 10
8
operations with a failure rate
of less than 10
-9
with a confidence level of 90%.
Dimensions in inches (mm)
Loaded conditions (resistive load: 20 V; 500 mA;
operating frequency: 125 Hz)
RI-46AA
Life expectancy: min. 10
7
operations with a failure rate
of less than 10
-8
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).
RI-46A; RI-46B; RI-46C
Life expectancy: min. 2.5 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 > 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.
End of life criteria:
Contact resistance > 1Ω after 2 ms
Release time > 2 ms (latching or contact sticking).
COTO TECHNOLOGY (USA)
Tel:
(401) 943-2686 / Fax (401)
118
942-0920
6
(Europe) Tel: +31-45-5439343 / Fax +31-45-5427216
RI-46 Series Dry Reed Switch
Note 1: Switching higher currents is possible depending on signature of the load.
Mechanical Data
Contact arrangement is normally open; lead finish is
tinned; net mass is approximately 280 mg; and can be
mounted in any position.
Shock
The switches are tested in accordance with “IEC 68-2-
27”, test Ea (peak acceleration 500 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-
6”, test Fc (acceleration 10 G; 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 40 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
E-mail: sales@cotorelay.com
For Most Recent Data, Consult the Coto Technology Website:
www.cotorelay.com
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