C-TEC 30-250 MF-CF




Short description

The C-TEC 30-250 MF-CF series DC buffer module uses ultracapacitors for energy storage. In normal operation, these capacitors are charged from an external charging unit. If the supply is interrupted, the energy stored on the ultracapacitors is available to the load as a buffer. The buffer module continues to supply the load until it is discharged. The length of buffer time available is a function of the charge level of the capacitors and the discharge current.


For the monitoring, a CMS unit is required, which monitors several modules via bus.

The buffer module offers the following advantages:

  • Maintenance-free with long-life ultracapacitors
  • large temperaturrange
  • basic-balancing to save energy
  • connectable reinforced balancing
  • Temperatur-Monitoring
  • Under- and Overvoltage-Monitoring of the single cells
  • Potential-free contacts (free configurable)
  • Module are connectable over Can-Bus
  • Application of cycles by integrated fan possible

Technical Data 

Nominal input voltage

30 V DC

Input voltage range

0 ... 32,4 V DC

Max. charging current

150 A

Max. discharge current

150 A

Max. cascadable unit

800 V DC (care the maximum altitude)

Internal resistance (new)< 10 mOhm

Capacitance (new)

250 F +/-10%

Energy content

112 kJ (discharge from 30 ... 0 V)

Buffer time

approximately 93 s (30 .. 0 V DC) 80 A

Control voltage

24 V DC

Control circuit input current

Protection type

IP 20 u. EN 60529

Storage temperature

-40 ... 70°C

Operating temperature

-40 ... 60°C

Air humiditymax. 90% (non-condensing)

Maximum altitude at

90 ... 800 V

90 ... 424 V

90 ... 212 V

      0 m ... 2000 m above sealevel

2000 m ... 4000 m above sealevel

4000 m ... 8000 m above sealevel

Dimensions (H x W x T)