RI-25 Series Dry Reed Switch
RI-25 Series
Micro dry-reed switch hermetically sealed in a gas-filled glass enve-
lope. 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 high load applications in relays or
switching devices.
RI-25 Series Features
Can handle up to 25 W load
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-25
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.
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-25 series.
No-load conditions (operating frequency: 100 Hz)
Life expectancy: min. 3x10
8
operations with a failure
rate of less than 0.9x10
-9
with a confidence level of
90%.
End of life criteria:
Contact resistance > 1Ω after 2 ms
112
Release time > 2ms (latching or contact sticking).
Loaded conditions (resistive load: 20 V; 500 mA;
operating frequency: 125 Hz)
RI-25AAA
Life expectancy: min. 10
6
operations with a failure rate
of less than 2.5x10
-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).
RI-25AA; RI-25A; RI-25B; RI-25C
Life expectancy: min. 5x10
7
operations with a failure
rate of less than 5x10
-9
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).
Loaded conditions (resistive load: 50 V; 100mA;
operating frequency: 50 Hz)
Life expectancy: min. 10
6
operations with a failure rate
of less than 2x10
-7
with a confidence level of 90%.
End of life criteria:
Contact resistance > 1Ω after 5 ms
Release time > 2 ms (latching or contact sticking).
Switching different loads involves different life expect-
6
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