AC C-TEC 2403-1

Capacitor buffered Power Supply

Type      :   AC-C-TEC 2403
Art.-No. :   NCPA0724G01017



Short description


The buffered DC power supply of the AC C-TEC series includes ultra-capacitors as energy storage inside the housing. During normal operation this capacitor is charged from AC-mains. The connected DC consumers are supplied as well from AC mains. In case of an interruption of the AC supply, the energy of the ultra-capacitor is realesed regulated. With a dc/dc converter the load is supplied from the capacitor until it is discharged. The backup time depends on the state of charge of the capacitor and the discharge current.

The power supply has the following characteristics:

  • Maintenance-free  because of long-life ultra-capacitors
  • Mikrocontroller based charging and discharging oft he ultra-capacitors
  • Control of operation and status of charge with potential-free contacts and LED
  • Capacity extension possible with external capacitor extension modules


Technical Data


Nominal input voltage

115 V…230 V AC ±15 %

Nominal input voltage range

97,8 V…264,5 V AC ±0 %

Nominal frequency

47 Hz…63 Hz

Nominal input current

1,5 A @ 115 V AC

0,75 A @ 230 V AC

Max. inrush current

30 A / 2 ms


Nominal output current

3 A -13 % +9 %

Nominal output voltage (in mains operation)

24,3 V DC ±2 %

Output voltage (in back-up operation)

23,5 V DC ±2 %

Energy (typical)


1,5 kJ @ (Ua = 22,8 V DC, Ia = 0,6 A)

Current limitation

See chapter 5.5 Short-circuit

Max power loss ‚worst-case‘

12 W


88% @ (Ue=230 V AC; Ua=24,3 V DC; Ia=INenn)


Internal device protection

2,5 A (T), 250 V

Fusing DC-output circuit (external)

3,15 A (T)


Protective System


Operational temperature

-40 °C…60 °C

Storage temperature

-40 °C…60 °C

Rel. humidity

≤95% no condensation

Max. installation height (without load reduction)

2000 m above sea level

Dimensions (H x W x D)

157 mm x 72 mm x 139 mm


0,85 kg


File Format
Datasheet AC C-TEC 2403-1220118PDF
Quickstart AC C-TEC 2403140314PDF
Quickstart AC C-TEC 2403 + CEM 2402140314PDF
EPLAN Macro140703edz
3D Model-STP

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