Safety isolating transformer

ST 20/23/12

Characteristics

Benefits

 Very good switch-on behaviour thanks to reduced starting currents

 High power density due to a compact construction design

 Primary side ±5 % tappings for voltage adjustment

 Very good corrosion protection and low noise thanks to BLOCK IMPEX vacuum impregnation

 Contact protected screw connection terminals complying with UVV BGV A3

 Simple mounting thanks to robust metal footplate with oval slots

Product Safety isolating transformer
Order number ST 20/23/12
Power 20 VA
Input 219 V / 230 V / 241 V
Output 12 V • 1.67 Aac
Frequency range 50 Hz to 60 Hz
EN insulation class B (130°C)
UL Insulation class class 105
Duty Cycle 100 %
Wire material Copper
General
Short circuit proof not short-circuit proof
Switching group Ii0
Cooling type AN
Enviroment
Ambient temperature -20 °C to 40 °C / -4 °F to 104 °F
Max. installation height 2,000 m / 6,562 ft
Protection and safety
Protection type IP 00
Protection class (prepared) I
Overvoltage category III
Degree of contamination 2
Electrical Connections
Terminal Pri Screw terminal
Terminal Sec Screw terminal
Terminal PE Flat plug connection
Size and Weight
Width 66 mm / 2.6 in
Height 81 mm / 3.19 in
Depth 56 mm / 2.2 in
Weight 0.7 kg / 1.54 lbs
Low Voltage Directive EN 61558-2-6
Approval cURus - Recognized UL 5085-1/-2; CSA 22.2
VDE Approval

VDE 0570-2-x (DIN EN 61558-2-x)

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