RI-26 Series Dry Reed Switch
RI-26 Series
Close dierential micro dry-reed switch hermetically sealed in a gas-lled
glass envelope. Single-pole, single-throw (SPST) type, having normally open
contacts, and containing two magnetically actuated reeds.
e switch is of the double-ended type and may be actuated by an elec-
tromagnet, a permanent magnet or a combination of both. e device is
intended for use in applications with small hysteresis in switching behavior.
RI-26 Series Features
▪ Close differential reed switch
▪ Contact layers: gold, plated ruthenium
▪ Superior glass-to-metal seal and blade alignment
▪ Excellent life expectancy and reliability
▪ RoHS Compliant
Dimensions for RI-26 Series
All Dimension in inches (mm) nominal
General data for all models RI-26
AT-Customization / Performed Leads
Besides the standard models, customized products can also
be supplied oering the following options:
• Operate and release ranges to customer specication
• Cropped and/or performed leads
Coils
All characteristics are measured using the Philips Standard
Coil. For denitions 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
e 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-26 series.
No load conditions (operating frequency:
100Hz)
Life expectancy: min. 3 x 108 operations with a failure rate
of less than 0.9 x 10-9 with a condence 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: 20 V; 500
mA; operating frequency: 125 Hz)
Life expectancy: min. 5 x 107 operations with a failure rate
of less than 5 x 10-9 with a condence level of 90%.
End of life criteria:
Contact resistance > 2Ω after 2.5 ms
Release time > 2.5 ms (latching or contact sticking)
Switching dierent loads involves dierent life expectancy
and reliability data. Further information is available on
request.
Mechanical Data
Contact arrangement is normally open; lead nish is
tinned; net mass is approximately 190mg; and can be
mounted in any position.
Shock
e switches are tested in accordance with “IEC 68-2-27”,
test Ea (peak acceleration 50 G, half sinewave; duration
11 ms). Such a shock will not cause an open switch (no
magnetic eld present) to close, nor a switch kept closed
0.024 max
(Ø0.60)
0.906 ± 0.020
(23.0 ± 0.5)
1.811 ± 0.020
(46.0 ± 0.5)
0.570 max
(14.5)
0.100 max
(Ø2.54)
formerly
USA Tel: +(1)973 777 6900 / Fax: +(1) 973 777 8405 ▪ Belgium Tel: + 32 (0)12 390400 Page 1 of 3
tinned
RI-26 Series Dry Reed Switch
Technical Specications
Parameters Test Conditions Units RI-26AA RI-26A RI-26B
Operating Characteristics
Operate Range AT 14-23 18-32 28-52
Release Range in % of operate values % 80 75 70
Operate Time - including Bounce (typ.) ms 0.30 0.30 0.30
Bounce Time (typ.) ms 0.15 0.15 0.15
Release Time (max) μs30 30 30
Resonant Frequency (typ.) Hz 5500 5500 5500
Electrical Characteristics
Switched Power (max) W 15 15 20
Switched Voltage DC (max) V 200 200 200
Switched Voltage AC, RMS value (max) V 140 140 140
Switched Current DC (max) mA 1000 1000 1000
Switched Current AC, RMS value (max) mA 1000 1000 1000
Carry Current DC (max) A 1.25 1.5 1.75
Breakdown Voltage (min) V 275 325 400
Contact Resistance (initial max.) mΩ 100 110 110
Contact Resistance (initial typ.) mΩ 70 75 75
Contact Capacitance (max) without test coil pF 0.3 0.25 0.25
Insulation Resistance (min) RH ≤ 45% MΩ 106106106
by an 80 AT coil to open.
Vibration
e switches are tested in accordance with “IEC 68-2-6”,
test Fc (acceleration 10G; below cross-over-frequency 58
Hz; amplitude 0.75 mm; frequency range 10 to 2000 Hz;
duration 75 minutes.) Such a vibration will not cause an
open switch ( no magnetic eld present) to close, nor a
switch kept closed by an 80 AT coil to open.
Mechanical Strength
e robustness of the terminations is tested in accordance
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°; max: +125°C.
Note: Temperature excursions up to 150°C may be
permissible. For more information contact your nearest
Comus Group sales oce.
Soldering
e 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
e leads can be welded.
Mounting
e 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 elds from
inuencing the operating and measuring conditions.
• As part of the company policy of continued product improvement, specications
may change without notice.Our sales ofce 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 otherwise agreed in writing.
USA Tel: +(1)973 777 6900 / Fax: +(1) 973 777 8405 ▪ Belgium Tel: + 32 (0)12 390400 Page 2 of 3
RI-26 Series Dry Reed Switch
Page 3 of 3
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
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Comus Technology BV
Jan Campertstraat 11
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e Netherlands
Tel: +31(0)45 5439345
Fax: +31(0)45 5427216
email: info@comus-intl.com
Website: http://www.dry-reeds.com
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
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