Thumbnail Filmstrip of Diode MURS160-13-F 1A 600V DO-214 FRED SMD Images

Diode U1JB 600V 1A DO-214 SMT / MURS160-13-F

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.

Fast Recovery Epitaxial Diodes (FREDs) feature ultra-fast switching speeds, robust current capacity, and minimal reverse-recovery overshoot (ringing) compared to standard rectifiers. With a 600V peak reverse rating, the U1JB is ideal for higher voltage secondary rails, tube/valve equipment power supplies, and mains-side rectification circuits. Always ensure you match the current, voltage, and physical package requirements of your specific circuit board before installation.

Technical Specifications for U1JB 600V 1A DO-214 (SMB) Surface Mount Diode

Electrical Characteristics:

Diode Type: Ultrafast / Fast Recovery Epitaxial Diode (FRED)
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)): 1.0 A
Peak Forward Surge Current (I_FSM): 30 A (8.3 ms single half sine-wave)
Maximum Instantaneous Forward Voltage (V_F): approx. 1.70 V @ 1.0 A
Maximum Reverse Recovery Time (t_rr): approx. 30 ns
Maximum DC Reverse Current (I_R):
- 5 µA @ rated DC blocking voltage (at 25°C)
- 50 µA @ rated DC blocking voltage (at 125°C)
Typical Junction Capacitance (C_J): approx. 15 pF (measured at 4.0 V DC, 1 MHz)

Mechanical & Thermal Specifications:

Package Type: DO-214AA / SMB (Surface Mount Technology)
Case Material: Molded plastic (UL 94V-0 flame retardant)
Polarity: Cathode band denotes the negative terminal
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. Fast Recovery Epitaxial Diodes (FREDs) 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 (1A Continuous Forward): Check that the forward current capacity (1A rating for this model) easily exceeds the maximum current draw of your transformer and load, providing adequate operating headroom.
Package Type (DO-214AA / SMB SMT): Confirm that the physical Surface Mount Technology (SMT) DO-214AA footprint matches your circuit board pads and component height restrictions.

Professional Installation Recommended:

Working on high-voltage power supply circuits involves handling dangerous stored electrical charges and sensitive surface-mount components. Soldering SMT components requires appropriate fine-tip 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.