J. Schneider C-TEC 2403

J. Schneider C-TEC 2403 Capacitor buffered Power Supply , The DC-UPS of the series CTEC includes ultra-capacitors as energy storage inside the housing. This capacitor is charged with the system voltage (Ue) during normal operation. The connected loads are supplied as well from the system voltage. In case of an interruption of the system voltage the energy of the ultra-capacitors is released in a regulated way. With a dc dc converter, the load is supplied by the capacitor until it is discharged. The back-up time depends on the state of charge of the capacitors and on the discharge current.

The DC-UPS has the following characteristics:

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

Another Article:

J. Schneider C-TEC 2403 Technical Data

Nominal input voltage

24  V DC -15 % / 15 %

Input voltage range

20,4 V … 27,6 V DC

Min. charging voltage

23,7 V DC

Nominal input current (at 24,0 V DC) C charged 3 A load

3,1 A DC

Output voltage in back-up operation

23,0 V DC ±2 %

Nominal output current Max

3 A DC (at 0,94 kJ respectively 0,47 kJ)

Nominal output current at maximum energy

2 A DC (at 1,0 kJ respectively 0,5 kJ))

Current limitation

1,05 … 1,2 x INom

Power loss at Uc >

2,5 W

Power loss at 100 % load and charge

7 W  (max. 60 seconds)

Efficiency at Uc >

>96% @ (Ue=24,0 V DC; Ua=22,9 V DC; Ia=INom)

Internal device protection (internal)

4 A (T)

fusing DC-output circuit (external)

3 A (T)

Type of connection: input Ue

Spring terminal  max. 1,0 mm²

Type of connection: output Ua

Spring terminal max. 1,0 mm²

Type of connection: message contacts

Spring terminal max. 1,0 mm²

Max. load message contact (Ue-OK[1])

30 V/ 0,5 A
potential-free relay-contact

Protective system

IP20 u. EN 60529

Operational temperature

-20 °C … 60 °C

Storage temperature

-20 °C … 60 °C

Rel. humidity

≤95% no condensation

Max. mounting height (without load reduction)

2000 m above sea level

dimensions (HxWxD)

92,5 mm, 60 mm, 116 mm


0,6 Kg

Fixation Snap-on mounting for DIN top hat rail
UL approvals

UL 508


[1] The message contacts are coupled with LED display. The illumination of a LED effects the activation of the corresponding relay.

Reference : j-schneider.de

Download :

Datasheet C-TEC 2403-01

Datasheet C-TEC 2403-05

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