formerly
RI-27 Series Dry Reed Switch
RI-27 Series
Pico dry-reed switch hermetically sealed in a gas-filled glass envelope. Single-
pole, single-throw (SPST) type, having normally open contacts, and contain-
ing two magnetically actuated reeds.
The switch is of the double-ended type and may be actuated by an electro-
magnet, a permanent magnet or a combination of both.The device is intend-
ed for use in relays, sensors, pulse counters or similar devices.
Dimensions for RI-27 Series
RI-27 Series Features
▪
Ideal for ATE switching
▪
Contact layers: gold, sputtered ruthenium
▪
Superior glass-to-metal seal and blade alignment
▪
Excellent life expectancy and reliability
▪
RoHS Compliant
0.906 ± 0.020
(23.0 ± 0.5)
0.071 max
(Ø1.8)
0.531 max
(13.5)
1.811 ± 0.020
(46.0 ± 0.5)
tinned
0.020 max
(Ø0.50)
All Dimension in inches (mm) nominal
General data for all models RI-27
AT-Customization / Performed 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 performed leads
Coils
Release time > 2 ms (latching or contact sticking).
Loaded conditions (resistive load: 5 V; 100 mA;
operating frequency: 125 Hz)
RI-27AAA
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 & Applica-
tion Information
Section of this catalog.
Life expectancy and reliability
Life expectancy: min. 2 x 10
7
operations with a failure rate
of less than 10
-8
with a confidence level of 90%.
End of life criteria:
Contact resistance > 1Ω after 2.5 ms
Release time > 1 ms (latching or contact sticking).
RI-27AA; RI-27A
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-27 series.
No load conditions (operating frequency:
100Hz)
Life expectancy: min. 5 x 10
7
operations with a failure rate
of less than 0.5 x 10
-8
with a confidence level of 90%.
End of life criteria:
Contact resistance > 1Ω after 2.5 ms
Release time > 1 ms (latching or contact sticking).
Loaded conditions (resistive load: 12 V; 4 mA;
(15 mA peak); operating frequency: 170 Hz)
RI-27AAA
Not applicable.
RI-27AA; RI-27A
Page 1 of 3
Life expectancy: min. 10 operations with a failure rate of
less than 2 x 10
-10
with a confidence level of 90%.
End of life criteria:
Contact resistance > 1Ω after 2 ms
9
USA Tel: +(1)973 777 6900 / Fax: +(1) 973 777 8405
▪
Belgium Tel: + 32 (0)12 390400
RI-27 Series Dry Reed Switch
Technical Specifications
Parameters
Test Conditions
Units
RI-27AAA
RI-27AA
RI-27A
Operating Characteristics
Operate Range
Release Range
Operate Time - including Bounce (typ.)
Bounce Time (typ.)
Release Time (max)
Resonant Frequency (typ.)
Electrical Characteristics
Switched Power (max)
Switched Voltage DC (max)
Switched Voltage AC, RMS value (max)
Switched Current DC (max)
Switched Current AC, RMS value (max)
Carry Current DC (max)
Breakdown Voltage (min)
Contact Resistance (initial max.)
Contact Resistance (initial typ.)
Contact Capacitance (max)
Insulation Resistance (min)
without test coil
RH ≤ 45%
W
V
V
mA
mA
A
V
mΩ
mΩ
pF
MΩ
10
180
130
500
500
1.5
180
115
90
0.3
10
6
10
200
140
500
500
1.75
240
115
90
0.3
10
6
10
200
140
500
500
1.75
280
115
90
0.25
10
6
AT
AT
ms
ms
μs
Hz
10-19
4-16
0.25
0.05
30
6700
16-25
5-18
0.25
0.05
30
6700
20-34
7-19.5
0.25
0.05
30
6700
Life expectancy: min. 45 x 10
6
operations (tested up to
50 x 10
6
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
Mechanical Strength
The robustness of the terminations is tested in accordance
with “IEC 68-2-21”, test Ua1 (load 10 N).
Operating and Storage Temperature
Contact arrangement is normally open; lead finish is
tinned; net mass is approximately 100mg; and can be
mounted in any position.
Shock
Operating ambient temperature; min: -55°C; max:
+125°C. Storage temperature; min: -55°; max: +125°C.
Note: Temperature excursions up to 150°C may be
permissible. For more information contact your nearest
Comus Group sales office.
Soldering
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.
Vibration
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 accor-
dance 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 switches are tested in accordance with “IEC 68-2-6”,
test Fc (acceleration 10G; 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.
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.
USA Tel: +(1)973 777 6900 / Fax: +(1) 973 777 8405
▪
Belgium Tel: + 32 (0)12 390400
Page 2 of 3
RI-27 Series Dry Reed Switch
Comus International
454 Allwood Road
Clifton, New Jersey 07012
U.S.A
Tel: (1)973 - 777 - 6900
Fax: (1)973 - 777 - 8405
email: info@comus-intl.com
Website: http://www.comus-intl.com
ISO 9001:2008
CERTIFICATE NO: 03-12314
Comus Europe Ltd
Unit 7, Rice Bridge Industrial Estate
Thorpe - Le - Soken
Essex, England
CO160HL
Tel: +44 (0)1255 862236
Fax: +44 (0)1255 862014
email: sales@comuseurope.co.uk
Website: http://www.comuseurope.co.uk
ISO 9001:2008
CERTIFICATE NO: FM 21080
Comus Belgium BVBA
Overhaamlaan 40
B-3700 Tongeren
Belgium
Tel: +33 (0)12 390400
Fax: +33 (0)12 235754
email: info@comus.be
Website: http://www.comus.be
Comus Technology BV
Jan Campertstraat 11
6416 SG Heerlen
The Netherlands
Tel: +31(0)45 5439345
Fax: +31(0)45 5427216
email: info@comus-intl.com
Website: http://www.dry-reeds.com
TAKE A LOOK AT OUR VARIETY OF PRODUCTS
Comus Electronics and Technologies
India Private Limited
2nd Floor, No.31/33, Anjugam Nagar
2nd Street, Ashok Nagar, Jaferkhanpet
Chennai 600083
Tamil Nadu, India
Tel:+(91)-(44)-42023510
Fax:+(91)-(44)-22628198
email: info@comus-intl.com
Website: http://www.comusindia.com
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• As part of the company policy of continued product improvement, specifications may change without notice. Our sales office will be pleased to help you with the latest
information on this product range and the details of our full design and manufacturing service. All products are supplied to our standard conditions of sale unless other-
wise agreed in writing.
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