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K0349LC650 Medium Voltage Thyristor 6500V, 349A

This part is obsolete, please contact our team for a modern day alternative on 01444 243 452 /

The K0349LC650 is a medium voltage thyristor phase control thyristor designed and optimised for medium voltage applications and series operation.

  • Vrrm 6500V
  • Itav 349A
  • Package: W10
  • Optimised for medium voltage applications
  • -40°C to +115°C operating range

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As voltages increase, so do switching losses and turn-off time to a point where they become significant in line frequency applications. Device lifetime is also engineered to achieve an optimum balance between conduction losses, commutation losses and turn-off time to give maximum power handling from line frequency to 400Hz.

The K0349LC650 is now obsolete and stock is limited.

For further information on this device please contact our sales team on 01444 243 452 or email

Typical Applications

  • High power converters
  • Medium voltage DC drives
  • HVDC
  • Static Var compensators
  • Excitation and transfer switches

Refer to manufacturer’s datasheet for full technical information.



, , , ,

Maximum Repetitive Reverse Voltage (VRRM)


Maximum Average On-state Current IT(AV)M


Turn-off Time (Tq)


Non-Repetitive Peak Reverse Voltage (VRSM)


DC On-State Current IT(d.c.)


Value for Fusing (I2t)

115 x 103 A2s

Operating Temperature (TJ op)

-40°C to +115°C

Threshold Voltage (VT0)


Slope Resistance (rT)


Product Type

Medium Voltage Thyristor

Product Status


IXYS UK Westcode is one the of the UK’s leading semiconductor manufacturers. Formerly known as Westcode, they launched the world’s first commercial rectifier in the early 1920’s. Westcode was acquired by IXYS Corporation in 2002, and shortly after changed its name to IXYS UK Westcode. Today, they manufacture high power thyristor capsules (GTO, fast & standard recovery), diode capsules (fast & standard recovery) and IGBT capsules.

As IXYS UK Westcode’s Official UK Distributor, we stock Europe’s largest range of IXYS UK’s semiconductors, fuses and capacitors. The company provide a large range fuses offering fast-acting, ultra rapid protection against device rupture and external short circuits. IXYS UK’s range of fuses feature proven advanced technology to international standards and are UL recognised. IXYS UK Westcode offer a range of power electronic capacitors to suit almost any application from filtering and smoothing DC voltages to GTO/IGBT snubber circuits and medium frequency applications.

One of the industries leading power semiconductor manufacturers, IXYS UK Westcode supplies high technology components to a wide range of applications, including: welding, AC and DC drives, rectifier supplies, uninterruptible power supplies, motor soft starts, transportation, induction heating and power conditioning.

IXYS UK Westcode

IXYS UK Westcode, formerly Westcode Semiconductors has been at the forefront of power semiconductor design. Supporting a truly worldwide and diverse market place, IXYS UK Westcode has evolved in to one of the world’s leading manufacturers of high power semiconductors.

IXYS UK Westcode is now part of Littelfuse. Together, IXYS and Littelfuse will leverage their combined technology portfolios and expertise to enhance customer value.

Learn more about IXYS UK Westcode products by getting in touch with GD Rectifiers.




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