Product Detail
- Recovery time: 150ns-500ns.
- Current range: 1A-3A.
- Models: FR101-FR307.
- Use case: moderate switching.
Product Description
This standard fast recovery diode page is for circuits that need faster recovery than a general rectifier, but do not need the cost or behavior of an ultrafast part. You can compare FR101-FR107, FR201-FR207 and FR301-FR307 by reverse voltage, current, recovery time, package size, surge rating and replacement fit. The 150ns to 500ns range works well in many auxiliary SMPS, relay coil, snubber and moderate converter positions. Lian Tuo helps you choose a sensible FR diode instead of overspecifying every switching node. That makes the recovery-speed choice easier to defend during BOM review.
Our Standard Fast Recovery Diode Options
| FR101-FR107 Standard Fast Recovery Diode | 1A DO-41 series for moderate-speed rectification and common through-hole replacement orders. |
| FR201-FR207 Standard Fast Recovery Diode | 2A axial range for stronger current paths while keeping familiar FR recovery behavior. |
| FR301-FR307 Standard Fast Recovery Diode | 3A axial option for converter boards, relay circuits and higher-current switching positions. |
| DO-41 Standard Fast Recovery Diode | Compact leaded package for 1A class boards and older BOM replacements. |
| DO-201AD Fast Recovery Diode | Larger axial body for 3A class applications needing more current and thermal room. |
Feature Box
- Moderate Recovery150ns-500ns speed fits many non-ultrafast circuits.
- FR Series RangeFR101 to FR307 covers common voltage and current needs.
- Axial FitLeaded packages suit repair stock and through-hole boards.
- Cost ControlStandard FR parts avoid unnecessary ultrafast overspecification.
Choose Enough Speed
A standard fast recovery diode is useful when a slow rectifier creates switching loss or waveform problems, but an ultrafast diode is not required. The 150ns to 500ns range gives practical recovery for many moderate-speed circuits. Start with frequency and waveform before choosing a model. It also keeps replacement sourcing from drifting into unnecessary cost.
Match Current Family
FR101-FR107, FR201-FR207 and FR301-FR307 families mainly separate current and package size. A standard fast recovery diode should match load current, surge and board space before voltage is finalized. That keeps replacement simple and avoids an unnecessary package jump. That makes the recovery-speed choice easier to defend during BOM review. It also keeps replacement sourcing from drifting into unnecessary cost.
Avoid Overspecifying Nodes
Not every switching position needs a hyperfast or ultrafast diode. Overspecification can raise cost or change circuit behavior without solving a real problem. Lian Tuo can help compare standard fast recovery diode choices so your BOM stays practical for production. It also keeps replacement sourcing from drifting into unnecessary cost.
Support Old BOMs
Many older power and control boards use FR series axial parts. When those markings are unclear, package size and circuit role help narrow the replacement. A standard fast recovery diode equivalent should keep the original lead fit while meeting voltage, current and recovery needs. That makes the recovery-speed choice easier to defend during BOM review.
Vertical Product Applications
Auxiliary SMPS Circuits
Use a standard fast recovery diode in auxiliary SMPS circuits when moderate switching speed and through-hole assembly are both needed. The part should match recovery time, reverse voltage and output current so the supply avoids excess loss without requiring premium ultrafast parts. It also keeps replacement sourcing from drifting into unnecessary cost.
Relay Coil Protection
Relay coil and inductive-load circuits can benefit from faster recovery when waveform timing matters. A standard fast recovery diode gives a practical middle ground between general rectifiers and ultrafast devices. Check voltage, current and package before approving repair stock. That makes the recovery-speed choice easier to defend during BOM review.
General Converter Boards
General converter boards often need FR series diodes for snubber, clamp or auxiliary rectifier positions. A standard fast recovery diode should be chosen by switching speed and actual stress. This keeps the board reliable without making the BOM heavier than needed. It also keeps replacement sourcing from drifting into unnecessary cost.
FAQ
When should I use a standard fast recovery diode?
Use it when a general rectifier is too slow for the circuit, but ultrafast recovery is not necessary. The 150ns to 500ns range is common in auxiliary supplies, relay circuits and moderate-speed converter boards. It also keeps replacement sourcing from drifting into unnecessary cost.
What is the difference between FR107 and 1N4007?
FR107 is a fast recovery diode, while 1N4007 is a general rectifier. FR107 recovers faster and is better suited to switching positions. You should still compare current, voltage, package and circuit stress before replacement. That makes the recovery-speed choice easier to defend during BOM review.
When should I choose ultrafast instead?
Choose ultrafast recovery when switching frequency, loss, heat or waveform requirements exceed what a standard FR diode can handle. If the circuit is only moderate speed, a standard fast recovery diode may be the better cost fit. It also keeps replacement sourcing from drifting into unnecessary cost.
What models are common in this group?
Common model families include FR101-FR107, FR201-FR207 and FR301-FR307. The number range usually reflects current class and voltage option, but the exact datasheet should be checked before approval. That makes the recovery-speed choice easier to defend during BOM review. It also keeps replacement sourcing from drifting into unnecessary cost.
What data helps quote standard FR diodes?
Send current, voltage, recovery-time need, package, old model, application and quantity. If you are replacing a failed part, include body size, marking and board position so the equivalent is practical. It also keeps replacement sourcing from drifting into unnecessary cost.
Can FR series parts replace ultrafast diodes?
Only if the circuit does not require the faster recovery of the ultrafast part. Replacing ultrafast with standard FR can increase switching loss or heat, so check frequency and waveform before approval. That makes the recovery-speed choice easier to defend during BOM review.
Can Lian Tuo support FR diode equivalents?
Yes. We can compare FR101-FR107, FR201-FR207 and FR301-FR307 options by voltage, current, recovery time and package so your sample request matches the circuit instead of a rough part number. It also keeps replacement sourcing from drifting into unnecessary cost. That makes the recovery-speed choice easier to defend during BOM review.
