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Diode HFA15PB60 HEXFRED 600V 15A TO-247 Through-Hole

Every audiophile knows how critical a clean power supply is to hi-fi performance. Upgrading standard power supply rectifiers with these hyperfast, soft-recovery diodes is one of the most effective ways to lower noise and improve fidelity. Designed to handle sudden changes in transformer current draw without generating switching harshness or ringing, these diodes deliver an immediate upgrade to sound quality - yielding a lower noise floor, sweeter high frequencies, and enhanced dynamic contrast.

HEXFRED diodes feature ultra-fast switching speeds, robust current capacity, and minimal reverse-recovery overshoot (ringing) compared to standard rectifiers. With a high 600V peak reverse rating and massive 15A continuous current capability in a robust TO-247 through-hole package, the HFA15PB60 is engineered for heavy-duty power supplies, high-power class-AB and class-A amplifiers, and high-voltage valve/tube gear. Always ensure you match the current, voltage, and physical package requirements of your specific circuit board before installation.

Technical Specifications for HFA15PB60 600V 15A TO-247 Through-Hole Diode

Electrical Characteristics:

Diode Type: HEXFRED Ultrafast Soft Recovery Diode
Repetitive Peak Reverse Voltage (V_RRM): 600 V
Maximum RMS Voltage (V_RMS): 420 V
Maximum DC Blocking Voltage (V_DC): 600 V
Average Forward Rectified Current (I_F(AV)): 15 A (at T_C = 100°C)
Peak Forward Surge Current (I_FSM): 60 A (8.3 ms single half sine-wave)
Maximum Instantaneous Forward Voltage (V_F): approx. 1.70 V @ 15 A (at 25°C)
Typical Reverse Recovery Time (t_rr): approx. 19 ns
Maximum DC Reverse Current (I_R):
- 10 µA @ rated DC blocking voltage (at 25°C)
- 1.0 mA @ rated DC blocking voltage (at 125°C)
Typical Junction Capacitance (C_J): approx. 25 pF (measured at 200 V DC)

Mechanical & Thermal Specifications:

Package Type: TO-247AC (Through-Hole)
Thermal Resistance, Junction to Case (R_θJC): 1.5 °C/W
Polarity: Pin 1 (Anode), Pin 2 (Cathode / Tab)
Operating Junction Temperature Range (T_J): -55°C to +150°C
Storage Temperature Range (T_STG): -55°C to +150°C
Mounting Position: Any (Screw mount to heatsink using M3 hardware)

What These Diodes Do & How to Choose the Right One:

In an audio power supply, diodes perform rectification, converting alternating current (AC) from the transformer into direct current (DC) for your sensitive audio circuitry. Standard rectifier diodes introduce switching noise, spikes, and high-frequency ringing into the power supply rails every time they turn on and off. HEXFRED diodes switch vastly quicker and recover far more smoothly, drastically reducing electrical hash and providing a cleaner, quieter DC supply to your equipment.

How to Select the Correct Diode for Your Upgrade:

Voltage Rating (600V Peak Reverse): The high 600V rating makes this diode suitable for high-voltage audio circuits, valve/tube power supplies, and primary mains rectification where standard low-voltage Schottky diodes cannot be used. Ensure it comfortably exceeds the peak AC voltage in your circuit.
Current Rating (15A Continuous Forward): Check that the forward current capacity (15A rating for this model) easily exceeds the maximum current draw of your transformer and load, providing exceptional operating headroom for heavy power amplifier supplies.
Package Type (TO-247 Through-Hole): Confirm that the physical through-hole TO-247 pin spacing and heatsink mounting layout match your circuit board and chassis arrangement.

Professional Installation Recommended:

Working on high-voltage power supply circuits involves handling dangerous stored electrical charges and high-power through-hole components. Installation requires appropriate high-wattage soldering equipment and proper heatsink mounting practices (including thermal compound or insulating washers where required). Professional installation or installation by a qualified electronics technician is recommended to prevent damage to your audio equipment.

Technical & Safety Disclaimer: Power supply modifications must only be carried out with the device completely disconnected from mains power and all filter capacitors fully discharged. High-voltage circuits carry risks of severe electrical shock. Always verify circuit operating voltages, current demands, and component polarity before applying power. Incorrect component selection or improper orientation can result in component failure or damage to your equipment.