Sanghvi Electronics

The PD100KN16 is a power diode module designed for high‑current, high‑voltage rectification in industrial power electronics. It integrates a pair of series‑connected silicon rectifier diodes into a single chassis‑mountable module, providing a robust solution for AC‑to‑DC conversion stages in power systems.

• Made with silicon rectifier diode elements in a series pair configuration to withstand high reverse voltage while enabling robust current handling.

• The module’s isolated copper baseplate provides both electrical isolation and excellent thermal conductivity, allowing efficient heat transfer to a heatsink.

• Typical mounting uses M5 screw terminals, ensuring secure electrical connections in high‑power circuits.

✔ High voltage capability: 1600 V repetitive reverse blocking — suitable for industrial mains and inverter front‑ends.
✔ High current rating: 100 A continuous with very high surge tolerance (~2000 A).
✔ Low forward voltage drop (~1.5 V): supports efficient rectification with reduced heat generation.
✔ Thermally efficient design: low junction‑to‑case resistance for easier heatsinking.
✔ Wide temperature range: reliable operation from −40 °C up to +150 °C.
✔ Isolated chassis mount: simplifies mechanical mounting and electrical safety.

The PD100KN16 is used where high‑power rectification is required, such as:

• AC‑to‑DC rectifiers for variable frequency drives (VFDs)

• Uninterruptible Power Supplies (UPS) input stages

• Battery chargers and industrial power supplies

• Welding power supplies and heavy‑duty converters

• DC bus rectification in inverters and traction systems                                                                                                                                           

• Device Type: Dual SCR (Silicon Controlled Rectifier) power module
• Configuration: Two SCRs in a half‑bridge (thyristor‑thyristor) arrangement
• Manufacturer / Family: Originally by IXYS (now Littelfuse)
• Package: WC‑501 / W74 chassis mount module
• Technology: Pressure‑contact SCRs with isolated baseplate

⚠️ Despite some distributor listings misclassifying it under “IGBT Modules,” this part does not contain IGBTs; it contains thyristors (SCRs).

• Gate Trigger Voltage (VGT): ~2.5 V
• Gate Trigger Current (IGT): ~250 mA

• On‑State Threshold Voltage (VT0): ~0.770 V
• Thyristors remain ON once gated until current falls below holding level (zero crossing).

• Thermal Resistance (junction‑to‑case): ~0.062 K/W per device
• Case‑to‑Heatsink Thermal Resistance: ~0.02 K/W
• Operating Temperature Range: ~‑40 °C to +125 °C

Good thermal performance facilitates heavy‑load duty and high power cycling when mounted to an appropriate heatsink.

• Dual Thyristors (SCRs): Two SCR devices configurable in a half‑bridge topology.
• Isolated Baseplate: Electrically isolated copper base for secure heatsink mounting.
• SCRs are controlled via individual gate and cathode terminals, allowing phase control of AC current.

• Module Size: Approximately 149 × 60 × 52 mm (W74 / WC‑501 package)
• Mounting: Chassis mount with bolt terminals for power connections
• Weight: ~1.5 kg
• Baseplate: Electrically isolated for heatsink attachment

The robust package is suitable for industrial power applications requiring reliable high‑current switching.

• Thyristor (SCR) operation:
  • Turn‑on: By gating when forward voltage and gate current are applied.
  • Turn‑off: Only occurs once the current falls below the holding level (e.g., at AC zero crossing).
  • Cannot be actively switched off by the gate like an IGBT module.

This makes the device ideal for line‑frequency rectification and phase control, but unsuitable for PWM high‑frequency switching typical in inverter applications.

The MCC552‑16IO2 module is widely used in:

• AC/DC controlled rectifiers
• Power controllers / voltage regulators
• AC motor soft starters
• DC motor drives (phase control)
• Industrial heating and furnace control
• Welding power supplies
• High‑power UPS rectifier stages

Such circuits require precise control of AC conduction and high current handling rather than high‑frequency switching.

The Thyristor Module turns on by applying a pulse current to a gate current. However, because it is a latch type semiconductor, the thyristor only turns on when a sustained current (holding current) reaches a set level. To turn off in a DC circuit, the gate current must be reduced below the holding current or reverse voltage has to be applied using a commutation circuit. In an AC circuit, the pulse current has to be applied to the gate current whenever it is positive, because the gate current falls below the holding current and the thyristor turns off whenever the current alternates.