Leading Power Semiconductor Manufacturer

TFI323-250 
TFI133-400
TFI233-320
TFI233-400
TFI333-320
TFI333-400
TFI433-400
TFI533-400
TFI833-250
TFI933-250
TFI143-400
TFI143-500
TFI143-630
TFI243-400
TFI243-500
TFI243-630
TFI343-400
TFI343-500
TFI343-630
TFI443-400
TFI443-500
TFI443-630
TFI543-400
TFI543-500
TFI543-630
TFI643-400
TFI643-500
TFI643-630
TFI153-800
TFI153-1000
TFI153-1250
TFI253-800
TFI253-1000
TFI253-1250
TFI353-700
TFI353-800
TFI353-1000
TFI353-1250
TFI453-1000
TFI453-1250
TFI163-1250
TFI163-1600
TFI263-1600
TFI173-1600
TFI173-2000
TFI273-1600
TFI273-2000
TFI373-1600
TFI373-2000
TFI473-1600
TFI573-2000
TFI673-2000
TFI773-1600
TFI773-2000
TFI873-1600
TFI183-2500
TFI183-3200
TFI193-2500

Stud

Module

Disc

Bridge Rectifier

Fast Switching Thyristors 250A – 3200A

Product Overview: The Fast Switching Thyristor LJ-MD, also known as the “Fast Impulse Thyristor” (TFI), is a high-performance press-pack type semiconductor device designed for fast switching applications.

Key Features:

  • High Performance: Engineered to meet stringent requirements, including enhanced di/dt resistance, low switching losses, and short turn-on and turn-off times.
  • Versatility: Capable of regulating and converting DC and AC currents up to 3200A at frequencies up to 10kHz in circuits with voltages up to 4000V, depending on the series.

Available Models:

  • Current ratings: 250 A, 320 A, 400 A, 500 A, 630 A, 800 A, 1000 A, 1250 A, 1600 A, 2000 A, 2500 A, and 3200 A.
  • Optimized Design: Fast switching thyristors feature normalized reverse recovery charge (Qrr) for high-frequency operation and high amplitude current pulses.

Performance Characteristics:

  • Reduced tq, trr, Qrr, and ERQ values for higher frequency operations.
  • Very low turn-off times and high (diT/dt)cr values (up to 2500 A/µs), distinguishing them from standard models.

Applications:

  • Welding
  • Induction heating and melting
  • Electric transportation
  • AC drives
  • UPS systems
  • Any application requiring rapid turn-on and turn-off times.

Technical Specifications:

  • Industry-standard ceramic-sealed housings protect functional components and semiconductor elements from mechanical impacts and environmental factors.
  • Polarity indicated by an icon on the case.
  • Proper assembly torque is critical to minimize electrical losses and maximize heat dissipation.
  • Use of heat-conducting paste is beneficial but not mandatory for installation.

Cooling Solutions:

  • Air and water heat sinks are available to ensure optimal cooling and performance.

Advantages of LJ-MD Fast Turn-Off Thyristors:

  • Low static and dynamic losses
  • High VDRM/VRRM values
  • Proven reliability across various industries
  • Voltage ratings from 300 to 4000 V
  • Current ratings from 250 to 3200 A
  • High resistance to thermal and electrical cycling
  • Natural or forced air cooling options available

Quality Assurance:

  • LJ-MD guarantees the quality of our thyristors, providing quality declarations and certificates of conformity upon request.
  • The final price depends on voltage class, quantity, delivery terms, manufacturer, country of origin, and payment method.

For more information, technical specifications, part numbering guides, and installation recommendations, please contact us for the detailed documents.

LJ-MD: Leading the way in high-performance semiconductor solutions.

PRODUCT TABLE

LJTFI 933250307 1 3

  • LJ-MD
  • TFI Fast Switching Thyristor
  • 933 series
  • 250 A, IT(AV)
  • 30 *100V = VRRM
  • 7 Digital code of (dVD//dt)crit
  • 1 Digital code of tq
  • 3 Digital code of tgt
250 A
TypeIT(AV) (Tcase)VDRM
VRRM
ITSMI2tdv/dtdi/dttqTvj maxRth(j-c)Fm ±10%W
A(ºC)VkAkA2sV/usA/ususºCºC/WkNg
LJ-TFI323-250250 (85)600-12003.0180100080020-251250.070670
LJ-TFI833-250250 (94)30005.71621000100050-1251250.04010180
LJ-TFI933-250250 (92)30005.4140200-10001600631250.04010180
320 A
TypeIT(AV) (Tcase)VDRM
VRRM
ITSMI2tdv/dtdi/dttqTvj maxRth(j-c)Fm ±10%W
A(ºC)VkAkA2sV/usA/ususºCºC/WkNg
LJ-TFI233-320320 (85)2000-24006.3190200-1000160025-501250.05010180
LJ-TFI333-320320 (85)1200-24006.3190200-1000160025-501250.05010180/110
400 A
TypeIT(AV) (Tcase)VDRM
VRRM
ITSMI2tdv/dtdi/dttqTvj maxRth(j-c)Fm ±10%W
A(ºC)VkAkA2sV/usA/ususºCºC/WkNg
LJ-TFI133-400400 (89)1000-12007.0240200-2500160010-201250.04010110
LJ-TFI143-400400 (90)1000-15008320200-10002000101250.03215280
LJ-TFI233-400400 (80)2000-24006.6210200-2500160050-631250.05010180
LJ-TFI243-400400 (88)2000-22008320200-10002000251250.03415280
LJ-TFI333-400400 (88)600-15006.0180200-2500160016-321250.04010180/110
LJ-TFI343-400400 (94)1000-15009.5450200-2500200010-201250.03015180
LJ-TFI433-400400 (89)300-12007.0240200-2500160010-201250.04010180/110
LJ-TFI443-400400 (91)2000-22009.0400200-2500200025-501250.03015180
LJ-TFI533-400400 (88)1000-15006.0180200-2500160016-321250.04010180
LJ-TFI543-400400 (92)1000-15009.5450200-2500200010-201250.03215240
LJ-TFI643-400400 (89)2000-22009.0400200-2500200025-501250.03415240
500 A
TypeIT(AV) (Tcase)VDRM
VRRM
ITSMI2tdv/dtdi/dttqTvj maxRth(j-c)Fm ±10%W
A(ºC)VkAkA2sV/usA/ususºCºC/WkNg
LJ-TFI143-500500 (85)1000-15009405200-1000200012.51250.03215280
LJ-TFI243-500500 (85)2000-22009400200-1002000321250.03415280
LJ-TFI343-500500 (91)1000-150011.0600200-2500200012.5-251250.03015240/180
LJ-TFI443-500500 (89)2000-220010.0500200-2500200032-631250.03015180
LJ-TFI543-500500 (89)1000-150011.0600200-2500200012.5-251250.03215240
LJ-TFI643-500500 (84)2000-220010.0500200-2500200032-631250.03415240
630 A
TypeIT(AV) (Tcase)VDRM
VRRM
ITSMI2tdv/dtdi/dttqTvj maxRth(j-c)Fm ±10%W
A(ºC)VkAkA2sV/usA/ususºCºC/WkNg
LJ-TFI143-630630 (80)1000-150010500200-10002000161250.03215280
LJ-TFI243-630630 (80)2000-220010500200-1002000321250.03415280
LJ-TFI343-630630 (84)1000-150011.5660200-2500200016-321250.03015240/180
LJ-TFI443-630630 (85)2000-220010.5550200-2500200032-631250.03015180
LJ-TFI543-630630 (81)1000-150011.5660200-2500160016-321250.03215240
LJ-TFI643-630630 (75)2000-220010.5550200-2500200032-631250.03415240
700 A
TypeIT(AV) (Tcase)VDRM
VRRM
ITSMI2tdv/dtdi/dttqTvj maxRth(j-c)Fm ±10%W
A(ºC)VkAkA2sV/usA/ususºCºC/WkNg
LJ-TFI353-700700 (87)300014980200-1000200040-631200.02026550
800 A
TypeIT(AV) (Tcase)VDRM
VRRM
ITSMI2tdv/dtdi/dttqTvj maxRth(j-c)Fm ±10%W
A(ºC)VkAkA2sV/usA/ususºCºC/WkNg
LJ-TFI153-800800 (85)1000-1500191800200-10002000101250.02126550
LJ-TFI253-800800 (85)1800-2200171400200-10002000201250.02126550
LJ-TFI353-800800 (80)3000-3400202000200-25002000631250.02126550
1000 A
TypeIT(AV) (Tcase)VDRM
VRRM
ITSMI2tdv/dtdi/dttqTvj maxRth(j-c)Fm ±10%W
A(ºC)VkAkA2sV/usA/ususºCºC/WkNg
LJ-TFI153-10001000 (80)1000-1500202000200-1000200012.51250.02126550
LJ-TFI253-10001000 (75)1800-2200181600200-10002000201250.02126550
LJ-TFI353-10001000 (79)2000-2800212200200-2500220050-631250.02026550
LJ-TFI453-10001150 (85)300-9001836001000100012.5-201250.016024330
1250 A
TypeIT(AV) (Tcase)VDRM
VRRM
ITSMI2tdv/dtdi/dttqTvj maxRth(j-c)Fm ±10%W
A(ºC)VkAkA2sV/usA/ususºCºC/WkNg
LJ-TFI153-12501250 (70)1000-1500212200200-10002000161250.02126550
LJ-TFI163-12501258 (85)2000-240024560010001000501250.01533700
LJ-TFI253-12501250 (71)1800-220019.51900200-10002000501250.02126550
LJ-TFI353-12501250 (80)600-150021240010001000201250.02026550
LJ-TFI453-12501250 (75)1000-1500294200200-2500200016-321250.02126330
1600 A
TypeIT(AV) (Tcase)VDRM
VRRM
ITSMI2tdv/dtdi/dttqTvj maxRth(j-c)Fm ±10%W
A(ºC)VkAkA2sV/usA/ususºCºC/WkNg
LJ-TFI173-16001890 (85)1500-200036800010001000401250.011451200
LJ-TFI273-16001704 (85)2000-240032800010001000501250.011451200
LJ-TFI373-16001600 (91)2000-2800408000200-2500250050-631250.010451700
LJ-TFI473-16001569 (85)3800-4000345700200-250020001251250.010451700
LJ-TFI773-16001600 (96)2000-2800408000200-2500250050-631250.0085451210
LJ-TFI873-16001600 (90)3800-4000345700200-250020001251250.0085451210
2000 A
TypeIT(AV) (Tcase)VDRM
VRRM
ITSMI2tdv/dtdi/dttqTvj maxRth(j-c)Fm ±10%W
A(ºC)VkAkA2sV/usA/ususºCºC/WkNg
LJ-TFI173-20002000 (89)900-140048.511700200-10002500101250.010451200/1700
LJ-TFI273-20002000 (85)2000408000200-10002500321250.010451700
LJ-TFI373-20002000 (84)2000-250037.26900200-1000250040-631250.010451700
LJ-TFI573-20002000 (92)1000-12006521100200-2500250010-201250.0085451210
LJ-TFI673-20002000 (91)2000408000200-2500250032-631250.0085451210
LJ-TFI773-20002000 (90)2000-2500408000200-1000250040-631250.0085451210
2500 A
TypeIT(AV) (Tcase)VDRM
VRRM
ITSMI2tdv/dtdi/dttqTvj maxRth(j-c)Fm ±10%W
A(ºC)VkAkA2sV/usA/ususºCºC/WkNg
LJ-TFI183-25002500 (80)2000-240040120001000100040-631250.008701800
LJ-TFI193-25002466 (85)2600-3000501100010001000631250.0065852200
3200 A
TypeIT(AV) (Tcase)VDRM
VRRM
ITSMI2tdv/dtdi/dttqTvj maxRth(j-c)Fm ±10%W
A(ºC)VkAkA2sV/usA/ususºCºC/WkNg
LJ-TFI183-32003214 (70)1000-160045135001000100025-631250.008701800
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and discover how our high-performance solutions can drive your innovation.

Company Overview: At LJ-MD, we specialize in the manufacturing and sale of a diverse range of power semiconductors. Our product lineup includes power thyristors, modules, rectifier diodes, avalanche diodes, rotor diodes, welding diodes, triacs, and more. These high-performance semiconductors are designed to handle currents up to 15,000A and voltages up to 9,000V. Additionally, we provide air and water heatsinks specifically tailored for these semiconductor devices.

Flexible Ordering and Competitive Pricing: Whether you need a single unit or bulk quantities, we accommodate orders of any size. Bulk orders benefit from reduced pricing, making us an ideal partner for large-scale projects. Our extensive global clientele trusts us for our reliability and superior product quality.

Innovative Power Control Solutions: Looking to revolutionize your power control systems? LJ-MD offers cutting-edge diode and thyristor technologies that adhere to the highest industry standards. Our products are designed for innovation, reliability, and superior performance across a wide range of power applications.

Product Features:

  • High Surge Current Capability: Our diodes and thyristors are built to handle high surge currents effectively.
  • Efficient Rectification and Fast Switching: Whether for rectification, switching, or phase control, our products provide precise and reliable results.
  • Customized Solutions: Understanding that every project is unique, we offer personalized support to help you find the perfect semiconductor solution for your needs.

Expert Support: Our team of experts is always ready to assist you with product selection and technical support, ensuring you get the optimal solution for your requirements.

Contact Us: Optimize your power control systems with LJ-MD’s advanced semiconductor solutions. Reach out to us today to discuss your project needs and find the ideal diode or thyristor solution to drive your success. Contact us now or email chen@lj-md.com to get started.

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