SIP SERIES REED RELAYS
ORDERING INFORMATION
SIL4 DSS4 MVS4 MSS4
If relays are inserted in close proximity, the pickup and dropout voltages will be affected by the magnetic flux
produced when the coils are energized.
In general, worst-case magnetic interaction conditions for pull-in voltage in a matrix exist when all relay fields
have the same polarity and all of the fields are from adjacent relays (See figure).
The direction of the parameter shift is determined by whether the stray flux aids or bucks the flux produced by the
coil of the relay under consideration.
To calculate the change in pull-in voltage and dropout voltage, multiply the percent change shown by the relay’s
nominal voltage. For example, if the percent change in pull-in voltage is 14% for a 5V nominal relay, the pull-in
voltage will increase by 0.7 volts.
XXXX XX XX X
A complete part number is represented by the digits below.
Series
SIL4
DSS4
Contact Form
1A = 1-Form-A (Normally open)
1B = 1-Form-B (Normally closed)
Blank = No diode
B = Diode option
(SIL4 & DSS4)
Coil voltage
03 = 3V (SIL4)
05 = 5V
12 = 12V
24 = 24V
SIL4/DSS4
Magnetic Interference
xx
Distance Between Centers of Adjacent Relays
(x, in inches)
Adjacent Relays
Relay under test
1. Nominal
voltage is applied
to the adjacent relays.
2. The % increase of pull-in
and drop out of the relay under test is measured
and compared with the values without any
magnetic influence of adjacent relays.
20.0%
15.0%
10.0%
5.0%
0.0%
0.1
0.7
0.2
0.3
0.4
0.5
0.6
MVS4/MSS4
Magnetic Interference
Distance Between Centers of Adjacent Relays
(in inches)
10.0%
7.5%
5.0%
2.5%
0.0%
0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 0.65 0.7
xx
Adjacent Relays
Relay under test
1. Nominal
voltage is applied
to the adjacent relays.
2. The % increase of pull-in
and drop out of the relay under test is measured
and compared with the values without any
magnetic influence of adjacent relays.
MAGNETIC INTERFERENCE
SRC
DEVICES
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DEVICES
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