Thumbnail Filmstrip of Diode HFA04TB60S 4A 600V Hexfred SMD Images

Diode HFA04TB60S HEXFRED 600V 4A D2PAK SMT

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 600V peak reverse rating and a high 4A current capacity in a surface-mount D2PAK (TO-263) housing, the HFA04TB60S is ideal for demanding power supply rails, high-power amplifier stages, and valve/tube equipment. Always ensure you match the current, voltage, and physical package requirements of your specific circuit board before installation.

Technical Specifications for HFA04TB60S 600V 4A D2PAK Surface Mount 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)): 4.0 A (at T_C = 100°C)
Peak Forward Surge Current (I_FSM): 17 A
Maximum Instantaneous Forward Voltage (V_F): approx. 1.50 V @ 4.0 A (at 25°C)
Typical Reverse Recovery Time (t_rr): approx. 17 ns
Maximum DC Reverse Current (I_R):
- 3.0 µA @ rated DC blocking voltage (at 25°C)
- 300 µA @ rated DC blocking voltage (at 125°C)
Typical Junction Capacitance (C_J): approx. 4.0 pF (measured at 200 V DC)

Mechanical & Thermal Specifications:

Package Type: D2PAK / TO-263 (Surface Mount Technology)
Thermal Resistance, Junction to Case (R_θJC): 5.0 °C/W
Polarity: Tab is electrically connected to Cathode
Operating Junction Temperature Range (T_J): -55°C to +150°C
Storage Temperature Range (T_STG): -55°C to +150°C
Mounting Position: Any

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 (4A Continuous Forward): Check that the forward current capacity (4A rating for this model) easily exceeds the maximum current draw of your transformer and load, providing high operating headroom for power-hungry stages.
Package Type (D2PAK / TO-263 SMT): Confirm that the physical Surface Mount Technology (SMT) D2PAK footprint and tab pad match your circuit board layout and heat management requirements.

Professional Installation Recommended:

Working on high-voltage power supply circuits involves handling dangerous stored electrical charges and power surface-mount components. Soldering D2PAK components requires appropriate high-thermal-capacity soldering or hot-air rework tools and experience. 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.