July 2017

Current protection devices

Extended range of PTC inrush current limiters

TDK Corporation has extended its range of EPCOS PTC-based inrush current limiters. The four new versions of the B5921*J0130A020 series with plastic housing are designed for voltages from 280 V AC to 560 V AC, offer rated resistances from 22 Ω to 100 Ω at 25 °C and have a heat capacity of up to 2.3 J/K. They are UL approved and are qualified to AEC-Q200.

The B594* and B597* series of leaded disk components offer rated voltages of between 260 V AC and 560 V AC. Depending on the type, their rated resistances are between 25 Ω and 1100 Ω. Also type-dependent, these protection devices have been approved in accordance with UL, IECQ and VDE. All types of both series are RoHS-compatible.

One great advantage of PTC inrush current limiters is their intrinsic safety. For example, if a short circuit should occur within a device when it is switched on, the component very quickly limits the current to non-critical values.

Typical applications for PTC inrush current limiters include converters and power supplies for industrial and household electronics as well as in e-mobility applications. These include onboard charging circuits and the charging and discharging of DC link capacitors in the drives of hybrid and electric vehicles.


Main applications

  • Converters and power supply units for industrial and household electronics
  • Onboard charging circuits and the charging and discharging of DC link capacitors in the drives 
    ​of hybrid and electric vehicles.

Main features and benefits

  • Wide range of rated voltages and resistances
  • Approvals compliant with UL, IECQ and VDE
  • Intrinsic safety

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