Group

RI-03 Series Dry Reed Switch

RI-03 Series

Micro 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 sensors, relays, pulse counters or similar devices.

RI-03 Series Features

▪ Ideal for general purpose reed relays and sensors.

▪ Contact layers: ruthenium on gold

▪ Superior glass-to-metal seal and blade alignment

▪ RoHS Compliant

Dimensions for RI-03 Series

All Dimension in inches (mm) nominal

General data for all models RI-03

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 1.25 times the published maximum operate

value for each type in the RI-03 series.

No load conditions (operating frequency: 100Hz)

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 > 2 ms (latching or contact sticking).

Loaded conditions (resistive load: 12 V; 4 mA;

operating frequency: 170Hz)

Life expectancy: min. 106 operations with a failure rate of

less than 10-8 with a confidence level of 90%.

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

Contact arrangement is normally open; lead finish is

tinned; net mass is approximately 190mg; 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.

0.024 max

(Ø0.60)

0.906 ± 0.020

(23.0 ± 0.5)

1.811 ± 0.020

(46.0 ± 0.5)

0.550 max

(14.0)

0.100 max

(Ø2.54)

formerly

tinned

USA Tel: +(1)973 777 6900 ▪ BE Tel: + 32 (0)12 390400 ▪ UK Tel: +44 (0)1255 862236 ▪ USA Tel: +(1)401 830 2100 ▪ NL Tel: +31(0)45 5439345

USA Tel: +(1)800 864 2815 ▪ IN Tel: +(91)(44)42023510

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