STSU 250/48

Control- and isolating transformer

Version STSU 250/48
Rated input voltage 230/400 Vac Rated output voltage 2 x 24 Vac Rated power VDE (DB cos phi=1) 250 VA
Version Rated input voltage Rated output voltage Rated power VDE (DB cos phi=1)
STSU 40/23 230/400 Vac 2 x 115 Vac 40 VA
STSU 40/24 230/400 Vac 2 x 12 Vac 40 VA
STSU 40/48 230/400 Vac 2 x 24 Vac 40 VA
STSU 63/23 230/400 Vac 2 x 115 Vac 63 VA
STSU 63/24 230/400 Vac 2 x 12 Vac 63 VA
STSU 63/48 230/400 Vac 2 x 24 Vac 63 VA
STSU 100/23 230/400 Vac 2 x 115 Vac 100 VA
STSU 100/24 230/400 Vac 2 x 12 Vac 100 VA
STSU 100/48 230/400 Vac 2 x 24 Vac 100 VA
STSU 160/23 230/400 Vac 2 x 115 Vac 160 VA
STSU 160/24 230/400 Vac 2 x 12 Vac 160 VA
STSU 160/48 230/400 Vac 2 x 24 Vac 160 VA
STSU 250/23 230/400 Vac 2 x 115 Vac 250 VA
STSU 250/24 230/400 Vac 2 x 12 Vac 250 VA
STSU 250/48 230/400 Vac 2 x 24 Vac 250 VA
STSU 400/23 230/400 Vac 2 x 115 Vac 400 VA
STSU 400/24 230/400 Vac 2 x 12 Vac 400 VA
STSU 400/48 230/400 Vac 2 x 24 Vac 400 VA
STSU 630/23 230/400 Vac 2 x 115 Vac 630 VA
STSU 630/24 230/400 Vac 2 x 12 Vac 630 VA
STSU 630/48 230/400 Vac 2 x 24 Vac 630 VA
STSU 1000/23 230/400 Vac 2 x 115 Vac 1,000 VA
STSU 1000/24 230/400 Vac 2 x 12 Vac 1,000 VA
STSU 1000/48 230/400 Vac 2 x 24 Vac 1,000 VA
STSU 1600/23 230/400 Vac 2 x 115 Vac 1,600 VA
STSU 2000/23 230/400 Vac 2 x 115 Vac 2,000 VA
STSU 2500/23 230/400 Vac 2 x 115 Vac 2,500 VA

Technical Data for STSU 250/48

Input
Rated frequency 50 - 60 Hz
Rated input voltage 230/400 Vac
Tappings Input ±15 V
Output
Efficiency 88.7 %
No-load voltage (app. x factor) 1.07
Rated output voltage 2 x 24 Vac
Rated power VDE (DB cos phi=1) 250 VA
Rated power VDE (KB cos phi=0.5) 850 VA
Secondary circuit 2
Standards
Classification Control- and isolating transformer
Approvals
Approvals cURus
Environment
Ambient temperature max. 104.0 °F
Type of cooling self cooling
Safety and protection
Insulation class VDE=B, UL=class 130
Protection index IP 00
Safety class (prepared) I
Type Open type
Short circuit strength non-short-circuit proof
Terminal and mounting
Fixing method Dual purpose foot plate also for installation on mounting rails
Fixing screws M5
Terminals Input Screw clamp, 4 mm²
Terminals Output Screw clamp, 4 mm²
Connection type Screw-type terminal, 4 mm²
Measures and weights
Width 3.78 inch
Height 4.09 inch
Depth 4.02 inch
Weight 7.94 lbs

Information for STSU series

General Data
  • Rated power 40 - 2,500 VA
  • Degree of protection IP 00
  • Efficiency up to 94 %
  • Maximum ambient temperature 104 °F / 40 °C
  • Insulation class B
  • Rated output voltage 2 x 12 - 2 x 115 Vac
  • Rated input voltage 230 and 400 Vac
Benefits
  • DIN rail clamp included 63 - 250 VA
  • High power density due to a compact construction design
  • Dual input voltage 230 and 400 Vac
  • Schielding winding between input and output
  • Reduced inrush current
  • Simple mounting due to robust metal footplate with oval slots
  • Primary side ±15 V taps for voltage adjustment
  • Contact protected screw connection terminals complying with UVV BGV A3
  • Very good corrosion protection and low noise due to BLOCK IMPEX vacuum impregnation

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