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Typical information for reference only
The following data is provided as experimental and/or calculated data for reference only. These figures fall under the category of typical behaviour
and the operation of individual relays will vary according to the exact operating conditions.
Typical Operate / Release Times
AC Type (operate / release time)
DC Type (operate / release time)
Load reduction Factor
1
0.8
0.6
0.4
1
0.8
0.6
Multiple Contact DC Switching Capacity
Switching capacity of DC resistive load
100
10
1
4 contacts
3 contacts
2 contacts
in series
0,1
20
40
60
80
Switching Voltage (Vdc)
This graph can be used to estimate the number of contacts that can be
used to switch DC resistive loads
0.4
cos(p.f.)
MY4
MY2
100
120
140
160
180
2-Pole model
8 ms/8 ms
14 ms/4 ms
For AC inductive loads (such as solenoids, contactors coils, etc.) the re-
duction factor corresponding to cos(p.f.) (cosine of the power factor) is
multiplied by the rated current in order to identify the maximum allowable
current. This approximation is not valid for loads with high inrush cur-
rents such as electric motors or fluorescent lamps.
0.2
Effect of temperature on coil voltages
MY2/4 Operating range (DC and AC type) vs ambient temperature
2
1.5
1.0
0.5
200
220
0
10
This graph shows the typical relationship between the maximum / mini-
mum coil and pick-up voltage and ambient temperature
General-purpose Relay
4-Pole model
10 ms/10 ms
14 ms/6 ms
1
2
1: Max coil voltage permitted.
2: Min pick-up voltage with coil
at ambient temperature
20
30
40
50
Ambient temperature (˚C)
MY New model
60
70
80
7
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