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RI-80 SMD Series Dry Reed Switch
RI-80 SMD Series
Ultra-micro dry-reed switch hermetically sealed in a gas-filled glass
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.
RI-80 SMD Series Features
Ideal for proximity sensors, telecom & medical applications
World’s smallest high quality reed switch
Contact layers: Gold, sputtered ruthenium
Superior glass-to-metal seal and blade alignment
General data for RI-80 SMD
AT-Customization
The RI-80 SMD can be supplied in operate ranges to
customer specification.
Coils
All characteristics are based on unmodified switches.
The switches are defined using the Philips Standard
Coil. For more information, see 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-80 series.
No-load conditions (operating frequency: 100 Hz)
Life expectancy: min. 108 operations with a failure rate
of less than 2 x10-9 with a confidence level of 90%.
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: 170 Hz)
Life expectancy: min. 107 operations with a failure
rate of less than 10-8 with a confidence level of 90%.
End of life criteria:
Contact resistance > 1Ω after 4 ms
Release time > .7 ms (latching or contact sticking)
Switching different loads involves different life expect-
ancy and reliability data. Further information available
upon request.
Mechanical Data
Contact arrangement is normally open; lead finish is
tinned; 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.
Dimensions in inches (mm)
RI-80 SMD G1 Model RI-80 SMD G2 Model RI-80 SMD J-Lead Model
89
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RI-80 SMD Series Dry Reed Switch
Vibration
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.
Mechanical Strength
The robustness of the terminations is tested in accor-
dance with “IEC 68-2-21”, test Ua1 (load 10N).
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.
* 200V for switches with AT-on value > 10AT.
** AT values of switches before SMD forming in PSC coil.
Model Number
RI-80 SMD
Parameters Test Conditions Units
Operating Characteristics
Operate Range** AT 5-15**
Release Range** AT 2-13**
Operate Time - including bounce (typ.) (energization) ms 0.35 (20 AT)
Bounce Time (typ.) (energization) ms 0.1 (20 AT)
Release Time (max) (energization)
µ
s 20 (20 AT)
Resonant Frequency (typ.) Hz 21.300
Electrical Characteristics
Switched Power (max) W 5
Switched Voltage DC (max) V 175*
Switched Voltage AC, RMS value (max) V 140
Switched Current DC (max) mA 350
Switched Current AC, RMS value (max) mA 250
Carry Current DC; AC, RMS value (max) A 0.5
Breakdown Voltage (min) V 230
Contact Resistance (initial max) (energization) m
Ω
160 (20 AT)
Contact Resistance (initial typ.) (energization) m
Ω
140 (20 AT)
Contact Capacitance (max) without test coil pF 0.45
Insulation Resistance (min) RH
≤
45% M
Ω
10
6
