UF3007 - 3A 800V Ultra-Fast Rectifier Diode | Diodes Inc
MPN: UF3007 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.22 | $0.22 |
| 10 | $0.17 | $1.70 |
| 100 | $0.11 | $11.00 |
| 500 | $0.08 | $40.00 |
| 1,000 | $0.06 | $60.00 |
UF3007 Overview
An ultra-fast rectifier is a power semiconductor diode engineered for very short reverse recovery time (trr), which is the interval during which the diode continues to conduct after the applied voltage reverses. Within the power-conversion component hierarchy, the ultra-fast rectifier is a member of the rectifier diode family, which in turn belongs to discrete semiconductors and power management building blocks. Fast recovery matters because slow diodes dissipate significant switching losses in high-frequency converters.
Key features of the UF3007 include a diffused-junction construction optimized for high switching efficiency, a surge overload rating of up to 150 A peak (non-repetitive), low reverse leakage current, and a plastic body carrying a UL flammability classification of 94V-0. High current capability combined with low forward voltage drop reduces conduction losses in the output stage.
Technical analysis: the 75 ns trr class places the UF3007 well below standard-recovery diodes (microseconds) and suits switching frequencies commonly found in flyback and forward converters. According to the manufacturer datasheet, for capacitive loads the output current should be derated by 20% relative to the resistive-load rating. Storage temperature spans -65C to +175C per typical DO-201AD ratings, enabling rugged industrial designs.
Typical applications include secondary-side output rectification in AC-DC switch-mode power supplies, free-wheeling and snubber circuits in motor drives, DC-DC converter output stages, and reverse-polarity protection in industrial equipment.
Design consideration: keep lead length short and verify average forward current derating at elevated ambient temperatures, since DO-201AD axial packages rely on lead conduction for heat extraction.
This page synthesizes distributor cross-reference data, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for UF3007 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
UF3005
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
UF3006
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
UF3007
β Drop-Inβ In Stock
$0.06 / Unit
View Datasheet βUF3007
β Drop-Inβ In Stock
$0.06 / Unit
View Datasheet βUF3007
β Drop-Inβ In Stock
$0.06 / Unit
View Datasheet βUF3007
β Drop-Inβ In Stock
$0.06 / Unit
View Datasheet βUF5408
β Drop-Inπ Reference alternative (not in catalog)
UF3007 Maximum Ratings & Electrical Characteristics
| Product Type | Ultra-Fast Rectifier Diode |
| Configuration | Single |
| Peak Repetitive Reverse Voltage (VRRM) | 800 V |
| Average Forward Current (IF(AV)) | 3.0 A |
| Forward Voltage Drop (VF) | 1.7 V |
| Reverse Recovery Time (trr) | 75 ns |
| Non-Repetitive Surge Current (IFSM) | 150 A peak |
| Technology | Diffused Junction |
| Package | DO-201AD (Axial, Through-Hole) |
| Mounting Type | Through-Hole |
| Flammability Rating | UL 94V-0 |
| Termination Style | Axial Lead |
| Load Derating | Derate current by 20% for capacitive load (per datasheet) |
| RoHS Status | Compliant |
| Lead Free | Yes |
UF3007 Pin Configuration
| Pin 1 | Anode β Positive current input; unmarked end of axial body |
| Pin 2 | Cathode β Current output; marked end of axial body (band) |
Average Forward Current Derating
Typical Applications
UF3007 is suitable for 6 applications: SMPS Secondary Output Rectification, Free-Wheeling and Snubber Circuits, DC-DC Converter Output Stages, AC Line Rectification with Fast Recovery Margin, Reverse Polarity and Battery Protection, Induction Heating and Welding Auxiliaries.
SMPS Secondary Output Rectification
In offline AC-DC flyback and forward power supplies, the secondary-side output rectifier is the dominant source of conduction and switching loss. The UF3007 fits this role because its 75 ns reverse recovery time minimizes the loss spike that occurs at each switching transition, while its 800 V VRRM comfortably covers secondary flyback voltages in 230 VAC systems. According to the Diodes Incorporated datasheet, the 3.0 A rating must be derated by 20% for capacitive loads, yielding roughly 2.4 A usable output current into a capacitor-input filter. Place the diode directly at the transformer secondary with a short return loop, and size the heatsinking via PCB lead pads since the DO-201AD package relies primarily on axial-lead thermal conduction.
Recommended
Free-Wheeling and Snubber Circuits
In motor drives, relay drivers, and inductive-load switching stages, the free-wheeling diode carries stored inductive energy when the switch turns off. The UF3007 suits this duty because its 75 ns trr ensures the diode starts blocking almost immediately after the switch turns on again, avoiding shoot-through current that slower diodes would cause. Its 800 V rating handles flyback voltage spikes on 24 V to 400 V DC buses, and the 150 A peak surge rating absorbs the initial inductor demagnetization current pulse. Mount the diode physically close to the switched inductor to minimize loop inductance; the axial DO-201AD package is convenient for hand-assembly in low-volume industrial control boards and allows simple field replacement during maintenance.
Recommended
DC-DC Converter Output Stages
High-voltage DC-DC converters such as boost and buck-boost topologies above 100 V output require output rectifiers with both fast recovery and high reverse-voltage margin. The UF3007 provides 800 V blocking with 75 ns recovery, allowing switching frequencies in the tens-of-kilohertz range without excessive recovery loss, and its 1.7 V forward drop is acceptable in high-output-voltage rails where VF is a small fraction of VOUT. In a 300 V boost converter switching at 50 kHz, the short trr prevents the diode from conducting significantly during switch turn-on transients. Verify reverse leakage at maximum operating temperature to bound standby losses, and keep anode and cathode traces wide to carry the pulsed peak currents demanded by the output capacitor.
Recommended
AC Line Rectification with Fast Recovery Margin
For bridge and half-wave rectification of 115 VAC or 230 VAC line inputs, the UF3007 offers more than adequate 800 V peak reverse voltage plus ultra-fast recovery that also absorbs switching transients and EMI-filter ring-back events. The datasheet specifies the ratings for single-phase, half-wave, 60 Hz operation with resistive or inductive loads, matching classic line-frequency use. In capacitive-input rectifier stages the 20% derating rule applies, giving approximately 2.4 A continuous DC output capability per diode. Its UL 94V-0 flame-retardant molded package suits mains-adjacent appliance and industrial power-entry designs, and the DO-201AD axial leads allow direct mounting across terminal strips or into traditional through-hole bridge configurations.
Recommended
Reverse Polarity and Battery Protection
Series reverse-polarity protection is a simple but valuable use of the UF3007 in battery-powered and field-serviceable industrial equipment. The 800 V rating gives enormous margin over typical 12 V to 48 V battery buses, the 3.0 A average current covers most instrumentation loads, and the 150 A surge rating withstands fuse-clearing fault events. The 1.7 V forward drop introduces a modest series loss - about 5 W at 3 A - so it is best used below roughly 1 A continuous where dissipation stays under 1.7 W and the axial leads can reject heat passively. For very low-voltage or high-current buses, consider a Schottky or ideal-diode MOSFET controller instead, trading the UF3007's voltage robustness for lower forward loss.
Recommended
Induction Heating and Welding Auxiliaries
Auxiliary power and gating supplies in induction heating, welding, and plasma equipment contain high-voltage DC buses where fast rectifiers must survive both steady-state stress and repetitive surge events. The UF3007's combination of 800 V blocking, 150 A single-cycle surge capability, and 75 ns recovery makes it well matched to snubber, gate-drive bias, and control-power rectification around these machines. The diffused-junction construction and low reverse leakage help maintain efficiency in thermally harsh enclosures near heat-generating work coils. Designers should respect the 20% capacitive-load derating and confirm that repetitive peak currents from resonant tanks remain within the datasheet maximum ratings table, which is specified at TA = 25C.
Recommended
Recommended Products Summary
Engineering reference data for UF3007 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | UF3005 | UF3006 | UF5408 | UF3007 (Lite-On) |
|---|---|---|---|---|---|
| Package | DO-201AD (Axial) | DO-201AD - same | DO-201AD - same | DO-201AD - same | DO-201AD - same |
| Brand | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated | MCC | Lite-On |
| Reverse Voltage (VRRM) | 800 V | 500 V | 600 V | 1000 V | 800 V |
| Average Forward Current | 3.0 A | 3.0 A | 3.0 A | 3.0 A | 3.0 A |
| Mounting Type | Through-Hole | Through-Hole | Through-Hole | Through-Hole | Through-Hole |
Key Differentiators
- Higher voltage rating within same family (vs UF3005)
- Ultra-fast 75 ns recovery vs standard rectifiers (vs UF5408-class standard/fast alternatives)
- High surge robustness (vs Typical 3 A fast rectifiers)
Design Notes
The DO-201AD axial package rejects heat primarily through its leads, not the body. Estimated: at 3 A average with 1.7 V maximum VF, conduction dissipation is about 5.1 W - too high for bare leads in still air. For continuous operation above roughly 1 A, provide generous PCB pad area or terminal-strip heat sinking on both leads and consider the 20% capacitive-load derating (effective ~2.4 A). Verify junction temperature against the datasheet derating curve for your ambient temperature.
Minimize the anode-cathode loop area when the UF3007 free-wheels a transformer secondary or inductor. Long axial leads add inductance that rings with the diode junction capacitance, producing EMI and voltage overshoot. Keep leads as short as practical (under 10 mm if possible), orient the diode close to the switched element, and route the high di/dt return directly beneath or beside the forward path on adjacent copper.
Do not apply the 150 A surge rating repetitively - it is a single-cycle non-repetitive rating. Also remember the datasheet condition: ratings are given at TA = 25C for single-phase, half-wave, 60 Hz resistive or inductive load, and capacitive loads require a 20% current derate. Designers often size the diode at full 3 A into a capacitor filter and fail at high ambient; derate first, then check recovery loss at your actual switching frequency.
Compliance Information
Plastic package carries UL 94V-0 flammability classification per datasheet. RoHS/lead-free status typical for current Diodes Incorporated production - confirm ordering suffix with distributor.
