RI-02 Series Dry Reed Switch
RI-02 Series
Ultra-miniature 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 relays, sensors, pulse
counters or similar devices.
RI-02 Series Features
Ideal for General Purpose reed relays and sensors
Contact layers: Ruthenium on gold
Superior glass-to-metal seal and blade alignment
Dimensions in inches (mm)
General data for all models RI-02
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
End of life criteria:
Contact resistance > 1Ω after 2 ms
Release time > 2ms (latching or contact sticking).
Loaded conditions (resistive load: 5V; 100 mA;
operating frequency: 125 Hz)
Life expectancy: min. 2 x 10
6
operations with a failure
rate of less than 10
-8
with a confidence level of 90%.
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-02 series.
No-load conditions (operating frequency: 100 Hz)
Life expectancy: min.10
8
operations with a failure rate
of less than 2 x10
-10
with a confidence level of 90%.
110
End of life criteria:
Contact resistance > 1Ω after 2.5 ms
Release time > 1 ms (latching or contact sticking).
Loaded conditions (resistive load: 20V; 500 mA;
operating frequency: 125 Hz)
Life expectancy: min. 2 x 10
6
operations with a failure
rate of < 10
-7
with a confidence level of 90%.
End of life criteria:
Contact resistance > 2Ω after 2.5 ms
Release time > 2.5 ms (latching or contact sticking).
Switching different loads involves different life expect-
COTO TECHNOLOGY (USA)
Tel:
(401) 943-2686 / Fax (401) 942-0920
6
(Europe) Tel: +31-45-5439343 / Fax +31-45-5427216
RI-02 Series Dry Reed Switch
Model Number
Parameters
Operating Characteristics
Operate Range
Release Range
Operate Time - including bounce (typ.)
Bounce Time (typ.)
Release Time (max)
Resonant Frequency (typ.)
AT
AT
ms
ms
µs
Hz
7-21
3-16
0.30 (25 AT)
0.10 (25 AT)
70 (25 AT)
10800
RI-02
Test Conditions
Units
(energization)
(energization)
(energization)
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)
W
V
V
mA
mA
A
V
m
Ω
m
Ω
pF
MΩ
10
200
140
500
500
0.5
200
150 (25 AT)
120 (25 AT)
0.30
10
6
(energization)
(energization)
without test coil
RH
≤
45%
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 90mg; 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.
Vibration
The switches are tested in accordance with “IEC 68-2-
26”, 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 Ua
1
(load 10 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.
6
E-mail: info@cotorelay.com
For Most Recent Data, Consult the Coto Technology Website:
www.cotorelay.com
111
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