RI-44 Series Dry Reed Switch
RI-44 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 sensors, relays, pulse counters or
similar devices where high voltages need to be switched.
RI-44 Series Features
High voltage breakdown voltage
Can handle up to 40W load
Contact layers: gold, rhodium
Superior glass-to-metal seal and blade alignment
Excellent life expectancy and reliability
Dimensions in inches (mm)
General data for all models RI-44
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-44 series.
Loaded conditions (resistive load: 20 V; 500 mA;
operating frequency: 125 Hz)
Operate Sensitivity > 25AT
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
available on request.
Other loads, contact Coto for more detail.
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.
MCBF 250M operations
116
COTO TECHNOLOGY (USA)
Tel:
(401) 943-2686 / Fax (401) 942-0920
6
(Europe) Tel: +31-45-5439343 / Fax +31-45-5427216
COTO [ COTO TECHNOLOGY ]
