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COTO TECHNOLOGY (USA) Tel: (401) 943-2686 / Fax (401) 942-0920

6 (Europe) Tel: +31-45-5439343 / Fax +31-45-5427216

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

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

MCBF 250M operations

End of life criteria:

Contact resistance > 2

Ω 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.

Dimensions in inches (mm)