Datasheet

Main circuit:
Number of NO contacts for main contacts 1
Number of NC contacts for main contacts 0
Operating current
● Rated value maximum
A 20
● at AC-51 Rated value
A 20
● minimum
mA 100
Operating voltage at AC
● at 50 Hz Rated value
V 24...230
● at 60 Hz Rated value
V 24...230
Operating range relative to the operating voltage at
AC
● at 50 Hz
V 20...253
● at 60 Hz
V 20...253
Operating frequency Rated value Hz 50...60
Relative symmetrical tolerance of the operating
frequency
% 10
Insulation voltage Rated value V 600
Rate of voltage rise at the thyristor for main contacts
maximum permissible
V/µs 500
Blocking voltage at the thyristor for main contacts
maximum permissible
V 800
Reverse current of the thyristor mA 10
Derating temperature °C 40
Active power loss total typical W 28.6
Surge current resistance Rated value A 200
I2t value maximum A²·s 200
Short-circuit protection, design of the fuse link
Control circuit/ Control:
Type of voltage of the control supply voltage DC
Control supply voltage 1
● at DC
— Initial rated value
V 15
— Final rated value
V 24
Control supply voltage
● at DC Full-scale value for signal<0> recognition
V 5
Relative symmetrical tolerance of the supply voltage
frequency
% 10
Control current
● at minimum control supply voltage
— at DC
mA 2
● at DC Rated value
mA 15
3RF20 20-1AA02 Changes preserved
Page 2/
5
22.09.2015 © Copyright Siemens AG