new 1pcs High voltage diode high frequency rectification silicon stack 2CL 40KV 5A

HV Components · Rectifier · 2CL 40KV · Silicon Stack Diode

What Is the 2CL 40KV 5A High-Voltage Diode?

The 2CL 40KV 5A is a high-voltage silicon stack rectifier diode rated for 40 kilovolts peak inverse voltage and 5 amperes forward current. It consists of multiple silicon diode junctions stacked in series within a single package to withstand extreme reverse voltage. Used in high-voltage DC power supplies for X-ray equipment, electrostatic precipitators, and industrial high-voltage systems.

In short: A 40,000-volt 5-amp high-frequency silicon stack diode — rectifies AC to DC in X-ray generators, electrostatic equipment, and industrial high-voltage power supplies.

Key Features

1. 40KV Peak Inverse Voltage

What it means: Withstands 40,000 volts in the reverse (blocking) direction without breakdown.
Why it matters: A single silicon junction typically handles only 1000-2000V — this device stacks many junctions to achieve 40KV in one package.
Result: Single-component rectification for voltages that would otherwise require a complex series-string of discrete diodes.

2. 5A Forward Current

What it means: Conducts up to 5 amperes in the forward direction, delivering significant DC power at high voltage.
Why it matters: A 40KV supply at 5A delivers up to 200KW — high-voltage diodes must handle both extreme voltage and substantial current.
Result: Suitable for high-power HV applications, not just low-current sensing or bias circuits.

3. High-Frequency Capable

What it means: Fast reverse recovery time allows operation at tens to hundreds of kilohertz switching frequencies.
Why it matters: Modern HV supplies use switch-mode topologies at high frequency to reduce transformer size and filter capacitor requirements.
Result: Compatible with modern switch-mode HV power supply designs, not just 50/60Hz linear supplies.

Key Specifications

Typical Applications

• X-Ray Generator Power Supplies: Rectifying the high-voltage transformer output in medical, dental, and industrial X-ray systems.
• Electrostatic Precipitators: Providing DC high voltage for particulate collection in industrial smoke stack and air purification systems.
• Capacitor Charging Supplies: Charging high-voltage pulse capacitors in pulsed laser, radar, and electromagnetic forming equipment.
• High-Pot Test Equipment: Use in hipot testers for cable, transformer, and insulation dielectric strength testing.

Frequently Asked Questions

"How should this diode be mounted for proper heat dissipation?"

At 5A forward current, the diode generates significant heat (forward voltage drop x current). It must be mounted on an adequate heatsink with thermal compound. The diode body may need forced-air cooling if operated continuously near maximum ratings. Verify the mounting and cooling requirements from the datasheet.

"Can I test this diode with a standard multimeter?"

A standard multimeter diode test applies only about 2-3V, which is insufficient to forward-bias the many series junctions in a 40KV diode stack. The meter will likely show "open" in both directions. Specialized high-voltage diode testers or a current-limited high-voltage source is needed for proper junction testing.

"What safety precautions are required when handling this diode?"

40KV is lethal. Always discharge all capacitors in the circuit before handling. The diode itself can retain charge in its junction capacitance. Use proper HV safety protocols — HV gloves, safety barrier, lockout/tagout, and never work alone. This component should only be handled by qualified high-voltage technicians.

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