RI-03AAA - COTO Technology

118 COTO TECHNOLOGY (USA) Tel: (401) 943-2686 / Fax (401) 942-0920 6 (Europe) Tel: +31-45-5439343 / Fax +31-45-5427216

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: Gold/copper, sputtered or plated

ruthenium (can vary)

 Superior glass-to-metal seal and blade alignment

RI-03 Series Dry Reed Switch

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 Stan-

dard 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;

(15 mA peak); operating frequency: 170 Hz)

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 expect-

ancy and reliability data. Further information is avail-

able on request.

Mechanical Data

Contact arrangement is normally open; lead finish is

tinned; net mass is approximately 190 mg; 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

Dimensions in inches (mm)

119

For Most Recent Data, Consult the Coto Technology Website: www.cotorelay.com 6 E-mail: info@cotorelay.com

RI-03 Series Dry Reed Switch

Vibration

The switches are tested in accordance with “IEC 68-2-

6”, test Fc (acceleration 10G; 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 Ua1 (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.

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.

Model Number

RI-03AAA RI-03AA RI-03A RI-03B

Parameters Test Conditions Units

Operating Characteristics

Operate Range AT 6-16 14-23 18-32 28-52

Release Range AT 3-15.5 6-21 7-27 10-36

Operate Time - including bounce (typ.) ms 0.1(20AT) 0.25(29AT) 0.25(40AT) 0.25(65AT)

Bounce Time (typ.) ms 0.05(20AT) 0.15(29AT) 0.15(40AT) 0.15(65AT)

Release Time (max)

s70(20AT) 30(29AT) 30(40AT) 30(65AT)

Resonant Frequency (typ.) Hz 5500 5500 5500 5500

Electrical Characteristics

Switched Power (max) W 5 10 10 10

Switched Voltage DC (max) V 160 200 200 200

Switched Voltage AC, RMS value (max) V 110 140 140 140

Switched Current DC (max) mA 250 500 500 500

Switched Current AC, RMS value (max) mA 250 500 500 500

Carry Current DC (max) A 1 1.5 2.5 2.5

Breakdown Voltage (min) V 200 250 300 350

Contact Resistance (initial max) (energization) m

Ω

120 (20 AT) 120 (25 AT) 120 (30AT) 120 (40 AT)

Contact Resistance (initial typ.) (energization) m

Ω

70 (20 AT) 70 (25 AT) 70 (30 AT) 70 (40 AT)

Contact Capacitance (max) without test coil pF 0.3 0.3 0.25 0.25

Insulation Resistance (min) RH

≤

45% M

Ω