Product Detail
- Current range: 1A-5A.
- Voltage classes: 50V-1000V.
- Models: FR107, ES1J.
- Use case: board switching.
Product Description
This small current FRD page is for buyers choosing 1A to 5A fast recovery diodes in compact power boards, auxiliary rails and light freewheel paths. You can compare FR107, HER108, UF4007, ES1J, FR207 and HER208 by recovery time, voltage, current, package size, lead fit and thermal room. Small current does not mean the choice is casual; tight layouts often leave little space for package changes. Lian Tuo helps you confirm a practical replacement or new-design sample before the board outline is locked. That keeps the sample practical for the actual PCB.
Our Small Current FRD Options
| FR107 Small Current FRD | 1A axial 1000V option for standard fast recovery replacement on through-hole boards. |
| HER108 Small Current FRD | High-efficiency 1A axial choice when recovery behavior and heat both need review. |
| UF4007 Small Current FRD | Ultrafast 1A option for faster switching positions with familiar axial package fit. |
| ES1J Small Current FRD | SMD package direction for compact automated assembly and small auxiliary rectifier paths. |
| FR207 Small Current FRD | 2A axial model for boards needing more current without moving to power packages. |
Feature Box
- Compact FitAxial and SMD bodies support tight board space.
- Speed ChoiceFR, HER and UF families can be compared.
- Easy ReplacementCommon markings help repair and BOM updates.
- Board HeatSmall packages are checked against real temperature.
Start With Board Space
A small current FRD often sits on a crowded board near transformers, relays or small inductors. The current rating may be modest, but the package still has to fit the lead pitch, height and solder process. Confirm the board space before choosing a faster or larger substitute. It also helps avoid changing a fixed repair footprint.
Choose Speed By Circuit
FR107, HER108 and UF4007 can look close in voltage, but their recovery behavior is not the same. A small current FRD should be selected by switching frequency, waveform and heat, not only the printed model number. This keeps replacement work from quietly changing circuit behavior. That keeps the sample practical for the actual PCB.
Control Small-Package Heat
Small axial and SMD diodes have limited body area, so heat margin can disappear quickly in enclosed equipment. The small current FRD choice should include duty cycle, nearby hot parts and copper area. That review helps prevent a compact replacement from running too warm. It also helps avoid changing a fixed repair footprint.
Keep RFQs Useful
When the old marking is unclear, a buyer may send several possible FRD names at once. Lian Tuo can narrow the request by photo, board role and package size. You get a small current FRD shortlist that engineering can test without sorting a long generic list. That keeps the sample practical for the actual PCB.
Vertical Product Applications
Auxiliary Supply Rails
Use a small current FRD in auxiliary supply rails when recovery speed is needed but current remains in the 1A to 5A range. The selected diode should match voltage stress, board heat and package space so the support rail stays reliable. It also helps avoid changing a fixed repair footprint.
Light Freewheel Paths
Light freewheel paths around coils, relays or small inductors need a diode that handles pulse current without oversized packaging. A small current FRD can fit these positions when recovery speed and surge rating are checked together. That keeps the sample practical for the actual PCB. It also helps avoid changing a fixed repair footprint.
Repair BOM Updates
Repair BOM updates often start with FR107, HER108 or UF4007 markings on older boards. A small current FRD replacement should match body size, lead spacing and recovery requirement before purchasing approves stock for repeated repairs. It also helps avoid changing a fixed repair footprint. That keeps the sample practical for the actual PCB.
FAQ
How do I choose a small current FRD?
Start with current, voltage, recovery speed, package and board temperature. Then compare whether FR, HER, UF or SMD options fit the circuit role. A 1A to 5A rating still needs thermal and waveform review. It also helps avoid changing a fixed repair footprint.
Can FR107 replace UF4007?
Not automatically. FR107 and UF4007 may share axial style and voltage class, but UF4007 is typically faster. If the circuit depends on ultrafast recovery, a slower FR107 may increase heat or waveform stress. That keeps the sample practical for the actual PCB.
When should I choose ES1J?
Choose ES1J when the board needs an SMD fast recovery diode for automated assembly or compact layout. Confirm current, voltage, recovery behavior and land pattern before treating it as a replacement for an axial FRD. It also helps avoid changing a fixed repair footprint.
Why does small-package heat matter?
A small diode has less body and copper area to spread heat. Even at modest current, warm enclosures or repeated pulses can raise temperature. Check duty cycle and nearby heat sources before sample approval. That keeps the sample practical for the actual PCB.
What data helps quote 1A-5A FRDs?
Send current, voltage, recovery requirement, package, target model, application and quantity. A photo of the old part with board position helps us confirm whether the request should stay axial or move to SMD. It also helps avoid changing a fixed repair footprint.
Can one small current FRD cover several boards?
Sometimes, if the boards have similar voltage, current, package and switching behavior. Standardizing helps purchasing, but each circuit should still be checked so the diode is not too slow or too hot. That keeps the sample practical for the actual PCB.
Can Lian Tuo support small FRD equivalents?
Yes. We can compare FR107, HER108, UF4007, ES1J, FR207 and nearby options by recovery, rating, package and availability so your sample list stays practical. It also helps avoid changing a fixed repair footprint. That keeps the sample practical for the actual PCB.
