RI-01C Series Dry Reed Switch
RI-01C Series
Pico 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-01C Series Features
Ideal for general purpose reed relays and sensors
Contact layers: ruthenium on gold
Superior glass-to-metal seal and blade alignment
Dimensions in inches (mm)
General data for all models RI-01C
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
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
Loaded conditions (resistive load: 12V; 4 mA;
(15 mA peak); operating frequency: 170 Hz)
Life expectancy: min. 106 operations
End of life criteria:
Contact resistance > 2Ω after 4 ms
Release time > 0.7 ms (latching or contact sticking).
Switching different loads involves different life expectancy and reliability data. Further information is available on request.
Mechanical Data
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-01C series.
Contact arrangement is normally open; lead finish is
tinned; net mass is approximately 100 mg; and can be
mounted in any position.
No-load conditions (operating frequency: 100 Hz)
Life expectancy: min. 108 operations with a failure rate
of less than 10-9 with a confidence level of 90%.
End of life criteria:
Contact resistance > 1Ω after 2 ms
Release time > 2ms (latching or contact sticking).
COTO TECHNOLOGY (USA) Tel: (401) 943-2686 / Fax (401)
The switches are tested in accordance with “IEC 68-227”, 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.
(Europe) Tel: +31-45-5439343 / Fax +31-45-5427216
RI-01C Series Dry Reed Switch
* The Contact Resistance is measured using the Kelvin Method next to the glass body.
The switches are tested in accordance with “IEC
68-2-6”, test Fc (acceleration 10 G; 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.
Mechanical Strength
The robustness of the terminations is tested in accordance with “IEC 68-2-21”, test Ua1 (load 10 N).
accordance with “IEC 68-2-20” test Ta, method 3:
solder globule temperature 235°C; ageing 1b:
4 hours steam.
The leads can be welded
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
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.
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
For Most Recent Data, Consult the Coto Technology Website:
E-mail: [email protected]