RI-48 Series Dry Reed Switch
RI-48 Series
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 perma-
nent magnet or a combination of both.
The device is intended for use in relays for switching power loads and
high stand-off voltage applications.
RI-48 Series Features
Perfect heavy load switch
Can handle loads up to 70 Watts
Contact layers: gold, sputtered ruthenium
Superior glass-to-metal seal and blade alignment
Excellent life expectancy and reliability
Dimensions in inches (mm)
General data for all models RI-48
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 Standard
Coil, refer to
“Application Notes”
in the
Reed Switch
Technical & Application Information
Section of this
catalog.
Loaded conditions (resistive load: 20 V; 500 mA;
operating frequency: 125 Hz)
RI-48AA
Life expectancy: min. 10
7
operations with a failure rate
of less than 10
-8
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).
RI-48A; RI-48B; RI-48C
Life expectancy: min. 2.5 x 10
7
operations with a failure
Life expectancy and reliability
The life expectancy data given below are valid for a coil rate of less than 10
-8
with a confidence level of 90%.
energized at 1.5 times the published maximum operate End of life criteria:
Contact resistance > 2Ω after 2.5 ms
value for each type in the RI-48 series.
Release time > 2.5 ms (latching or contact sticking).
No-load conditions (operating frequency: 100 Hz)
Life expectancy: min. 10
8
operations with a failure rate
Loaded conditions (resistive load: 100 V-700 mA;
operating frequency: 20 Hz)
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).
120
RI-48B; RI-48C
Life expectancy: min. 3x10
5
operations with a failure
rate of less than 10
-6
with a confidence level of 90%.
6
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COTO TECHNOLOGY (USA)
Tel:
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