Thyristor and Diodes Modules

We Provide High Quality Thyristor / Module / Diodes

About Us

TECH Semiconductors Co., Ltd. (TECHSEM), a specialized manufacturer in developing, producing and selling power semiconductor devices, is reestablished from Hubei Xiangfan Instrument Component Factory.

The products of XIANFENGTM and TECHSEMTM, which are famous for various kinds, high quality, good service reputation, are sold well in domestic market and have been exported to Europe, U.S, Korea, Japan, India, Taiwan, Southeast Asia and other countries and regions. With hills surrounding and fine scenery, the company is located in the famous Xiangfan city which is an ideal site for producing power semiconductor devices. With more than 40 years experiences of semiconductor devices manufacturing, TECHSEM has two purification buildings of over 8000m2, in which 1000m2 of 100 class cleaning room. Over 550 staffs work in the company, of which 76 are specialized engineers (32 senior engineers, 6 engineering masters). TECHSEM has great advantages in technology and production capability.

TECHSEM has a perfect and effective market net covering throughout China with nearly 200 distributors and 60 sole agents. In recent years, production capability of thyristors and modules stays on the first place and sales income stays in the first three places in domestic market. TECHSEM is pushing on the target of to be the leading competitive supplier for power semiconductors. TECHSEM sincerely hopes to establish concrete and honest business relationship with friends to mutually benefit and reach a bright future.

Phase Control Thyristors

FeaturesTypical Applications
  1. Amplifying gates
  2. International standard cases
  3. Hermetic metal cases with ceramic insulators
  4. Capsule packages for double sided cooling
  1. High power industrial and power transmission
  2. DC and AC motor control
  3. Controlled rectifiers
  4. Soft starters for induction motors
  5. AC controllers
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Fast Turn-Off Thyristors

FeaturesTypical Applications
  1. Interdigitated amplifying gates
  2. Fast turn-on and high di/dt
  3. Low switching losses
  4. Short turn-off time
  5. Hermetic metal cases with ceramic insulators
  1. Inductive heating
  2. Electronic welders
  3. Self-commutated inverters
  4. AC motor speed control
  5. General power switching applications
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High Frequency Thyristors

FeaturesTypical Applications
  1. Interdigitated amplifying gates
  2. Fast turn-on and high di/dt
  3. Low switching losses
  4. Short turn-off time
  5. Hermetic metal cases with ceramic insulators
  1. Inductive heating
  2. Electronic welders
  3. Self-commutated inverters
  4. AC motor speed control
  5. General power switching applications
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BI-directional Control Thyristors

FeaturesTypical Applications
  1. International standard cases
  2. Hermetic metal cases with ceramic insulators
  3. Capsule packages for double sided cooling
  1. High power industrial and power transmission
  2. DC and AC motor control
  3. AC controllers
  4. Soft starters for induction motors
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Rectifier Dioes

FeaturesTypical Applications
  1. Low forward voltage drop
  2. Reverse voltage up to 3800 V
  3. Capsule type metal-ceramic packages for double sided cooling
  1. All purpose high power rectifier diodes
  2. High power resistance welding equipment
  3. Non-controllable and half-controllable rectifiers
  4. Snubber diodes
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Fast Recovery Diodes

FeaturesTypical Applications
  1. Small recovered charge
  2. Soft recovery
  3. Up to 3000V reverse voltage
  4. Capsule type metal-ceramic packages for double sided cooling
  1. Inverse diodes for power transistors, GTO thyristor
  2. AC motor control
  3. Snubber diodes and free-wheeling diodes
  4. UPS
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Isolated Capsule Power Module

The modules can comprise one or two capsule type deviceson a common isolated base-plate, user only requires four fixing screws for mounting to a suitable heatsink.
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Thyristor Modules

FeaturesTypical Application
  1. Isolated mounting base, 2500V ~
  2. International standard package
  3. Pressure contact technology with increased power cycling capability
  4. Air-cooling for up to 350A. for over 400A, air-cooling or water-cooling
  5. Simple mounting and easy maintenance
  6. Space and weight saving
  1. AC/DC Motor drives
  2. Various rectifiers
  3. Heater controls
  4. Lighting controls
  5. Contactless switches
  6. Soft start AC motor control
  7. (TSC) SVC
  8. Welding power supply
  9. DC supply for PWM inverter
  10. Battery DC chargers or dischargers
  11. UPS
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Diode Modules

FeaturesTypical Application
  1. Isolated mounting base, 2500V ~
  2. International standard package
  3. Pressure contact technology with increased power cycling capability
  4. Air-cooling for up to 400A. for over 500A, air-cooling or water-cooling
  5. Simple mounting and easy maintenance
  6. Space and weight saving
  1. AC/DC Motor drives
  2. Various rectifiers
  3. Soft start AC motor control
  4. Welding power supply
  5. DC supply for PWM inverter
  6. Battery DC chargers or dischargers
  7. Supplies for DC power equipment
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Documentation and Support

Use our online request for specific proposed solutions or send your technical question directly to a product specialist at request:
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MDY55.pdf0.071Request
MDY55H.pdf0.071Request
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