Data Sheet

K
Ordering information
Example: 20 series relay, 35mm rail (EN60715) mount, double phase switch, 2 NO 16A contacts, coil rated at 12VDC, AgSnO
2
contacts.
2 0 . 2 2 . 9 . 0 1 2 . 4 0 0 0
Series
Type
2 = 35mm rail (EN60715) mount
No. of poles
1 = Single phase switch 1 NO (SPST-NO)
2 = Double phase switch 2 NO (DPST-NO)
3 = Double phase switch 1 NC+ 1 NO (SPST-NO+SPST-NC)
4 = 4 sequence double phase switch 2 NO (DPST-NO)
6 = 3 sequence double phase switch 2 NO (DPST-NO)
7 = 3 sequence double phase switch 2 NO (DPST-NO)
8 = 4 sequence double phase switch 2 NO (DPST-NO)
Contact material
0 = AgNi
4 = AgSnO
2
Coil voltage
See coil specifications
Coil version
8 = AC (50/60Hz)
9 = DC
Technical data
Insulation
Dielectric strength
between supply and contacts VAC 3500
between open contacts VAC 2000
between adjacent contacts VAC 2000
Other data
Power lost to the environment
with rated current and coil deenergised W 1.3 (20.21, 20.23, 20.28) 2.6 (20.22, 20.24, 20.26, 20.27)
Screw torque Nm 0.8 0.8
Coil terminals Contact terminals
Max. wire size solid cable stranded cable solid cable stranded cable
mm
2
1x4 / 2x2.5 1x2.5 / 2x2.5 1x6 / 2x4 1x4 / 2x2.5
AWG 1x12 / 2x14 1x14 / 2x14 1x10 / 2x12 1x12 / 2x14
If the coil is operated for a prolonged period of time, adequate ventilation of the relays must be provided - suggested gap of 9mm between adjacent
relays.
Coil specifications
DC version data
Nominal
voltage
Coil
code
Operating range Resistance Consumption
I at U
N
U
N
U
min
U
max
R
V V V
Ω
mA
12 9.012 10.8 13.2 27 440
24 9.024 21.6 26.4 105 230
48 9.048 43.2 52.8 440 110
110 9.110 99 121 2330 47
AC version data
Nominal
voltage
Coil
code
Operating range Resistance Consumption
I at U
N
U
N
U
min
U
max
R (50Hz)
V V V
Ω
mA
8 8.008 6.8 8.8 4 800
12 8.012 10.2 13.2 7.5 550
24 8.024 20.4 26.4 27 275
48 8.048 40.8 52.8 106 150
110 8.110 93.5 121 590 64
120 8.120 102 132 680 54
230 8.230 192 253 2500 28
240 8.240 204 264 2700 27.5
Type
Number
of steps
Sequence
1 2 3 4
20.21 2
20.22 2
20.23 2
20.24 4
20.26 3
20.27 3
20.28 4
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4
20 SERIES
Modular step relays 16A
20
SERIES