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 50
● at AC-51 Rated value
A 50
● minimum
mA 500
Operating voltage at AC
● at 50 Hz Rated value
V 48...600
● at 60 Hz Rated value
V 48...600
Operating range relative to the operating voltage at
AC
● at 50 Hz
V 40...660
● at 60 Hz
V 40...660
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 1000
Blocking voltage at the thyristor for main contacts
maximum permissible
V 1600
Reverse current of the thyristor mA 10
Derating temperature °C 40
Active power loss total typical W 66
Surge current resistance Rated value A 600
I2t value maximum A²·s 1800
Short-circuit protection, design of the fuse link
Control circuit/ Control:
Control supply voltage frequency
● 1 Rated value
Hz 50
● 2 Rated value
Hz 60
Type of voltage of the control supply voltage AC
Control supply voltage 1
● at AC
— at 50 Hz Initial rated value
V 110
— at 50 Hz Final rated value
V 230
— at 60 Hz Initial rated value
V 110
— at 60 Hz Final rated value
V 230
Control supply voltage
● at AC
— at 50 Hz Full-scale value for signal<0>
recognition
V 40
3RF20 50-1AA26 Changes preserved
Page 2/
6
05.10.2015 © Copyright Siemens AG