Product Detail
- Current range: 5A-20A.
- Packages: R-6, TO-220.
- Models: SF54, MUR1560.
- Use case: medium-power boards.
Product Description
This medium current FRD page is for projects that have moved beyond small axial diodes but do not yet need large module hardware. You can compare SF54, SF56, MUR1560, R-6 axial parts and TO-220 fast recovery diode options by current, voltage, recovery speed, surge rating, heat path and mounting style. The 5A to 20A range is common in freewheel, rectifier and boost positions where heat appears during real duty cycles. Lian Tuo helps you choose a sample that fits both circuit stress and assembly space.
Our Medium Current FRD Options
| SF54 Medium Current FRD | 5A axial option for medium-speed switching paths and compact higher-current boards. |
| SF56 Medium Current FRD | Higher-voltage SF choice for boards needing more reverse margin in axial form. |
| MUR1560 Medium Current FRD | 15A power-package direction for faster recovery and stronger thermal handling. |
| R-6 Medium Current FRD | Large axial body for through-hole designs needing current without tab mounting. |
| TO-220 Medium Current FRD | Heat-sinked package option for 10A-20A paths with mounting hardware review. |
Feature Box
- Current Margin5A-20A options cover many medium-power paths.
- Package ChoiceR-6 and TO-220 fit different thermal layouts.
- Recovery ReviewSpeed is matched to switching stress and heat.
- Surge SupportPulse current and duty cycle are checked early.
Review Duty Cycle
A medium current FRD should be checked against the actual duty cycle, not only average current. Freewheel and boost positions can see repeated pulses that heat the diode quickly. Share load current, pulse pattern and operating temperature so the package recommendation starts from real stress. It also gives purchasing a clearer package reason.
Choose Package By Cooling
R-6 axial parts and TO-220 parts cool through different paths. R-6 may fit through-hole boards without hardware, while TO-220 can use a heat sink or chassis contact. The medium current FRD package should follow the cooling method your assembly can actually support. That keeps the choice tied to the equipment duty cycle.
Balance Speed And Loss
Medium-current switching paths often need faster recovery, but the fastest part is not always the best fit. Recovery behavior, forward drop and package heat all interact. A medium current FRD should be chosen after the circuit role and waveform are clear. It also gives purchasing a clearer package reason. That keeps the choice tied to the equipment duty cycle.
Avoid Awkward Equivalents
A substitute that matches current and voltage can still fail approval if body size, pinout or mounting changes. Lian Tuo can compare SF, MUR, R-6 and TO-220 FRD options before purchasing approves a second source for medium-power production. That keeps the choice tied to the equipment duty cycle. It also gives purchasing a clearer package reason.
Vertical Product Applications
Medium-Power Freewheel Paths
Use a medium current FRD in freewheel paths when inductive current is too strong for small axial parts. The diode should match pulse current, voltage stress and cooling method. That keeps the freewheel path reliable during repeated switching. It also gives purchasing a clearer package reason. That keeps the choice tied to the equipment duty cycle.
Boost Diode Positions
Boost diode positions in medium-power boards need recovery speed and heat margin together. A medium current FRD can fit these rails when reverse voltage, duty cycle and package style are reviewed before sample approval. That keeps the choice tied to the equipment duty cycle. It also gives purchasing a clearer package reason.
Power Supply Rectifiers
Power supply rectifier positions often need 5A to 20A FRD options when standard rectifiers run too hot or recover too slowly. The selected package should fit board space, airflow and maintenance requirements. It also gives purchasing a clearer package reason. That keeps the choice tied to the equipment duty cycle.
FAQ
How do I choose a medium current FRD?
Check current, voltage, recovery speed, surge rating, duty cycle and cooling path. Then decide whether an R-6 axial body, TO-220 package or another power style fits your board and assembly process. It also gives purchasing a clearer package reason. That keeps the choice tied to the equipment duty cycle.
When should I use TO-220 instead of R-6?
Use TO-220 when the diode needs better heat-sink or chassis contact than an axial body can provide. R-6 may be simpler for through-hole boards, but TO-220 gives more mounting options for warmer 10A-20A paths. That keeps the choice tied to the equipment duty cycle.
Can SF54 and MUR parts be interchanged?
Only after checking voltage, current, recovery time, package and thermal path. MUR parts may be faster or packaged differently, so they should not be treated as automatic replacements for SF series devices. It also gives purchasing a clearer package reason.
Why does surge rating matter here?
Medium-power boards can create startup, fault or inductive pulses above normal load current. If surge margin is too low, the diode may fail even though average current looks acceptable. Pulse duration should be reviewed. That keeps the choice tied to the equipment duty cycle.
What data helps quote 5A-20A FRDs?
Send current, voltage, recovery-time target, package, duty cycle, old model and quantity. A board or heat-sink photo helps us compare R-6, TO-220 and other practical package options. It also gives purchasing a clearer package reason. That keeps the choice tied to the equipment duty cycle.
Can one 20A FRD replace a 10A part?
Sometimes, but the larger part must still match voltage, recovery behavior, package and mounting space. Higher current can help heat margin, but it can also change body size and approval requirements. That keeps the choice tied to the equipment duty cycle.
Can Lian Tuo support medium-current equivalents?
Yes. We can compare SF54, SF56, MUR1560, R-6 and TO-220 fast recovery diode options by rating, package, heat path and availability before recommending samples. It also gives purchasing a clearer package reason. That keeps the choice tied to the equipment duty cycle.
