Data Sheet

Data sheet 3TH2031-4BU4
Contactor relay, 31E, EN 50011, 3 NO + 1 NC, Screw terminal DC
operation 21.5 V DC !!! Phased-out product !!! Successor is SIRIUS
3RH21
Product designation Auxiliary contactor
Product type designation 3TH2
Size of contactor 0
Protection class IP on the front IP00
Reference code acc. to DIN 40719 extended
according to IEC 204-2 acc. to IEC 750
K
Reference code acc. to DIN EN 81346-2 K
Reference code acc. to DIN EN 61346-2 K
Type of voltage of the control supply voltage DC
Control supply voltage at DC
● rated value
21.5V
Number of NC contacts for auxiliary contacts 1
● delayed switching
0
● lagging switching
0
● make-before-break switching
0
Number of NO contacts for auxiliary contacts 3
● delayed switching
0
● leading contact
0
● make-before-break switching
0
Number of CO contacts for auxiliary contacts 0
Identification number and letter for switching
elements
31 E
Operating current at AC-15
● at 230 V rated value
4A
● at 400 V rated value
3A
Mounting type screw fixing
Height 48mm
Width 45mm
Depth 68mm
Type of electrical connection for auxiliary and control
current circuit
screw-type terminals
B10 value with high demand rate acc. to SN 31920 400000; With 0.3 x Ie
T1 value for proof test interval or service life acc. to
IEC 61508
20y
Protection against electrical shock finger-safe
Further information
3TH2031-4BU4 Subject to change without notice
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09/13/2019 © Copyright Siemens