Product Detail
- Applications: rectifier, clamp.
- Models: FR107, UF4007, MUR.
- Packages: axial, SMD, power.
- Use case: SMPS circuits.
Product Description
This SMPS fast recovery diode page is for power-supply teams selecting FRDs around secondary rectification, clamp networks and auxiliary winding outputs. You can compare FR107, HER108, UF4007, ES1J and MUR-series alternatives by recovery time, reverse voltage, surge rating, package heat path and waveform behavior. In SMPS circuits, diode choice affects loss, ringing, temperature and long-term reliability. Lian Tuo helps you read the circuit role before choosing samples, so the diode fits the actual switching waveform rather than a generic rating table. That keeps the selection connected to the real waveform.
Our SMPS Fast Recovery Diode Options
| FR107 SMPS Fast Recovery Diode | Standard 1A axial choice for moderate SMPS auxiliary and clamp positions. |
| HER108 SMPS Fast Recovery Diode | High-efficiency axial option for 1000V support rails where heat needs review. |
| UF4007 SMPS Fast Recovery Diode | Ultrafast axial model for faster switching paths with fixed through-hole spacing. |
| ES1J SMPS Fast Recovery Diode | SMD option for compact switch-mode boards and automated assembly lines. |
| MUR SMPS Fast Recovery Diode | Power-package direction for stronger current or high-voltage SMPS positions. |
Feature Box
- Waveform FitRecovery is reviewed against real SMPS switching stress.
- Clamp SupportRCD and auxiliary positions can be checked separately.
- Package RangeAxial, SMD and power FRDs are available.
- Heat ControlLoss and board temperature guide sample choices.
Read The Circuit Role
An SMPS fast recovery diode can sit in a secondary rectifier, an RCD clamp or an auxiliary winding output. Those positions do not share the same current and voltage stress. Identify the role first so recovery speed, voltage margin and package are chosen for the right waveform. It also gives your buyer a cleaner equivalent path.
Control Ringing And Heat
Reverse recovery can affect switching loss, ringing and component temperature in SMPS designs. A faster diode may help, but it should be reviewed with snubber behavior and layout. The SMPS fast recovery diode sample should solve the measured issue rather than create new noise. That keeps the selection connected to the real waveform.
Choose Package By Layout
FR107, ES1J and MUR options sit in very different board and thermal environments. Axial parts suit simple through-hole builds, SMD parts help compact production, and power packages handle stronger current. Package choice should follow the SMPS layout, not only current rating. It also gives your buyer a cleaner equivalent path.
Prepare Backup Models
Power supplies often stay in production after one approved diode becomes hard to buy. Lian Tuo can compare SMPS fast recovery diode equivalents by waveform role, package and recovery behavior so purchasing has backup options engineering can actually approve. That keeps the selection connected to the real waveform. It also gives your buyer a cleaner equivalent path.
Vertical Product Applications
Secondary Rectification
Use an SMPS fast recovery diode in secondary rectification when the output waveform needs faster recovery than a general rectifier. The part should match current, voltage spikes and board heat so the supply remains efficient under load. It also gives your buyer a cleaner equivalent path. That keeps the selection connected to the real waveform.
RCD Clamp Networks
RCD clamp networks need diode choices that handle pulse energy and recovery behavior cleanly. An SMPS fast recovery diode should be selected by clamp voltage, pulse current and package heat path before the snubber values are finalized. That keeps the selection connected to the real waveform. It also gives your buyer a cleaner equivalent path.
Auxiliary Winding Outputs
Auxiliary winding outputs often use small FRDs that must survive high reflected voltage and tight board space. A SMPS fast recovery diode should match recovery speed, package fit and voltage margin before samples move into production testing. It also gives your buyer a cleaner equivalent path. That keeps the selection connected to the real waveform.
FAQ
How do I choose an SMPS fast recovery diode?
Start with the diode position: secondary rectifier, clamp or auxiliary output. Then check current, voltage stress, recovery time, package and temperature. SMPS waveforms can make a simple rating comparison misleading. It also gives your buyer a cleaner equivalent path. That keeps the selection connected to the real waveform.
Can UF4007 replace FR107 in an SMPS?
Sometimes. UF4007 is faster, but the circuit may also react differently in ringing or EMI. Confirm recovery need, voltage, package and waveform behavior before approving UF4007 as a replacement. That keeps the selection connected to the real waveform. It also gives your buyer a cleaner equivalent path.
When should I use MUR-series diodes?
Use MUR-style parts when the SMPS position needs stronger current, higher voltage or faster recovery than small axial options provide. Package, pinout and heat-sink requirements should be checked before sampling. It also gives your buyer a cleaner equivalent path. That keeps the selection connected to the real waveform.
Why does SMPS diode recovery affect heat?
During switching, reverse recovery can create extra current and loss. That loss heats the diode and nearby switch. Choosing a suitable recovery speed helps reduce temperature when recovery is part of the problem. That keeps the selection connected to the real waveform.
What data helps quote SMPS FRDs?
Send topology, diode position, voltage, current, frequency, package, target model and quantity. Waveform or failure notes are useful when replacing a hot or damaged diode. It also gives your buyer a cleaner equivalent path. That keeps the selection connected to the real waveform.
Can one FRD cover every SMPS diode position?
Usually not. Secondary, clamp and auxiliary positions can have different pulse, voltage and recovery needs. Standardizing is possible only after stress and package fit are reviewed for each position. That keeps the selection connected to the real waveform. It also gives your buyer a cleaner equivalent path.
Can Lian Tuo support SMPS FRD equivalents?
Yes. We can compare FR107, HER108, UF4007, ES1J and MUR-series options by recovery, voltage, package and SMPS role so your sample list is focused. It also gives your buyer a cleaner equivalent path. That keeps the selection connected to the real waveform.
