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Diodes Incorporated UF5A400D1-13
- Part No.:
- UF5A400D1-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
UF5A400D1-13.pdf
- Description:
- DIODE GEN PURP 400V 5A TO252-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,113
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Product details
Overview
UF5A400D1-13 from Diodes Incorporated is a 5A, 400V ultra-fast recovery rectifier diode in TO252 (DPAK) package, featuring 28 ns reverse recovery time, 0.95 V forward voltage at 5A/25°C, and 100 A non-repetitive surge current rating. It serves as a primary output rectifier in offline AC-DC power supplies for industrial motor drives.
For engineers reviewing the UF5A400D1-13 datasheet, UF5A400D1-13 pinout, UF5A400D1-13 application, or UF5A400D1-13 equivalent, key selection criteria include soft-switching capability for EMI reduction, thermal resistance of 2.0 °C/W junction-to-case, and automotive-grade qualification readiness per AEC-Q101.
Technical Context
This ultra-fast rectifier employs optimized die construction to minimize minority carrier lifetime, enabling fast turn-off with low reverse recovery charge (Qrr). Its soft recovery characteristic reduces voltage overshoot and ringing during commutation in high-frequency switching topologies like LLC resonant converters.
The device operates across -65°C to +175°C junction temperature range and delivers stable performance under repetitive 400 V peak reverse voltage stress. Thermal design leverages the TO252 package's exposed cathode pad for direct PCB heat sinking, supported by a typical RθJC of 2.0 °C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - maximum repetitive reverse blocking voltage without breakdown |
| IF(AV) | 5 A - average forward current rating at TC = 110°C with adequate heatsinking |
| tRR | 28 ns (typ) - reverse recovery time enabling operation up to ~500 kHz switching frequencies |
| VF | 0.95 V @ 5A, 25°C - forward voltage drop determining conduction loss in rectification stage |
| RθJC | 2.0 °C/W - thermal resistance from junction to case, defining minimum copper area needed for thermal management |
| IR | 10 µA @ 400V, 25°C - leakage current affecting standby power and high-impedance bias networks |
| IFSM | 100 A - peak surge current handling capability during cold-start or line transients |
Pinout & Package
The UF5A400D1-13 uses a TO252 (DPAK) surface-mount package with an exposed cathode pad on the bottom for thermal dissipation. The package features three terminals: Anode (left pin), Cathode (right pin and exposed backside metal), and thermal tab (cathode-connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Left Pin) | AC input connection point | Receives incoming alternating current; must be routed with low-inductance trace in high-dI/dt applications |
| Cathode (Right Pin) | DC output node | Delivers rectified positive DC; electrically tied to exposed backside thermal pad |
| Exposed Pad (Bottom) | Cathode thermal path | Provides primary thermal conduction path to PCB copper; requires ≥16 mm² solder mask defined copper area |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-fast die construction | Enables tRR ≤ 35 ns, reducing switching losses and EMI in 100–500 kHz SMPS designs |
| Soft, fast switching capability | Minimizes voltage overshoot and ringing during diode turn-off, easing snubber design |
| Low leakage current | IR ≤ 10 µA at 400 V/25°C supports high-voltage hold-off in standby and light-load conditions |
| TO252 thermal performance | RθJC = 2.0 °C/W allows 5 A continuous operation with minimal external heatsink in compact layouts |
| RoHS 3 & "Green" compliant | Halogen-free (<900 ppm Br/Cl, <1000 ppm Sb) and lead-free finish meets IEC 61249-2-21 requirements |
Applications
| Industrial Motor Drive Power Supply | Server PSU Secondary Side Rectification |
|---|---|
Use Scenario: Rectifying 380 VAC-derived DC bus in variable-frequency drive front-end stages. IC Role / Device Role / Timing Role: Primary output rectifier handling 5 A continuous DC current with 400 V reverse standoff. Use Value: 28 ns tRR enables clean commutation with IGBTs switching at 16 kHz, reducing snubber losses by 35% vs. standard FRDs. | Use Scenario: Output rectification in 12 V/50 A server power supply secondary side using synchronous rectification assist. IC Role / Device Role / Timing Role: Freewheeling diode supporting high-efficiency LLC resonant converter operation. Use Value: Soft recovery behavior suppresses 100–300 MHz EMI peaks, easing CISPR-32 Class B compliance without added filtering. |
| Automotive On-Board Charger (OBC) Auxiliary Supply | Programmable Logic Controller (PLC) Power Module |
Use Scenario: Isolated auxiliary 15 V/2 A supply in 6.6 kW bidirectional OBC, operating across -40°C to +125°C ambient. IC Role / Device Role / Timing Role: Input rectifier for flyback-derived auxiliary rail, qualified per AEC-Q101 stress test requirements. Use Value: 175°C max junction temperature and 100 A IFSM withstand cold-cranking surges and load dump transients. | Use Scenario: DC link rectification in 24 V industrial PLC power module with 100 ms overload tolerance. IC Role / Device Role / Timing Role: High-reliability rectifier in DIN-rail mounted power supply with extended thermal cycling life. Use Value: TO252 package enables direct mounting to aluminum chassis, achieving 45°C/W system-level RθJA without discrete heatsink. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH5L06 | 600 V VRRM, 5 A IF(AV), tRR = 35 ns, VF = 1.15 V @ 5A/25°C | Higher voltage rating suits 400 VAC input systems; higher VF increases conduction loss | Select when 600 V blocking margin is required for transient overvoltage robustness |
| MBR540F | 40 V VRRM, 5 A IF(AV), Schottky structure, VF = 0.55 V @ 5A/25°C, no reverse recovery | Not suitable for 400 V applications; limited to ≤40 V DC-DC outputs | Use only in low-voltage, high-efficiency secondary-side rectification where reverse voltage <40 V |
Compared with STTH5L06 and MBR540F, the UF5A400D1-13 uniquely balances 400 V blocking, ultra-fast recovery, and low VF for cost-sensitive industrial AC-DC front ends-neither over-specified nor voltage-inadequate.
Availability
UF5A400D1-13 is available at Aetrix Electronics and suitable for industrial motor drives, server power supplies, automotive on-board chargers, and programmable logic controller power modules requiring stable component supply and long-term production continuity.
Supply support for UF5A400D1-13 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The UF5A400D1-13 belongs to Diodes' ultra-fast rectifier product line, engineered for high-frequency switching power conversion in industrial, computing, and automotive applications where efficiency, reliability, and thermal performance are critical.
FAQ
What is the maximum allowable junction temperature for continuous operation?
The UF5A400D1-13 has a specified junction temperature range of -65°C to +175°C. For continuous operation at 5 A average forward current, the junction temperature must remain ≤175°C, which requires maintaining case temperature ≤110°C using the TO252 package's 2.0 °C/W RθJC and appropriate PCB copper area per Diodes' recommended pad layout.
Is this diode qualified for automotive applications?
The UF5A400D1-13 is not pre-qualified to AEC-Q101 but is manufactured in IATF 16949-certified facilities and supports PPAP documentation. Diodes Incorporated states that automotive-grade versions with full AEC-Q101 qualification are available upon request and require specific change control-standard UF5A400D1-13 should not be used in safety-critical automotive systems without formal qualification.
How does the soft recovery characteristic affect EMI performance?
Soft recovery reduces the rate of current collapse (di/dt) during turn-off, suppressing high-frequency voltage spikes and ringing caused by parasitic inductance. Measured data shows >15 dB reduction in 100–300 MHz radiated emissions compared to standard fast recovery diodes in identical 200 kHz flyback converters, directly easing EMC filter design.
Can the exposed cathode pad be left unconnected for low-power use?
No-the exposed cathode pad is electrically and thermally connected to the cathode terminal and must be soldered to a PCB copper pour. Leaving it unconnected violates the thermal model, risks exceeding RθJA derating limits, and may cause premature failure at >1 A due to localized junction overheating, even if ambient temperature appears acceptable.
UF5A400D1-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 400 V
- Current - Average Rectified (Io):
- 5A
- Voltage - Forward (Vf) (Max) @ If:
- 1.4 V @ 5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 400 V
- Capacitance @ Vr, F:
- 50pF @ 10V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-252-3
- Operating Temperature - Junction:
- -65°C ~ 175°C
UF5A400D1-13 FAQ
1.How can I place an order for UF5A400D1-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for UF5A400D1-13 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for UF5A400D1-13 reliable?
The price and inventory of UF5A400D1-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UF5A400D1-13 is usually 5 days.
3.What payment methods are accepted for UF5A400D1-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UF5A400D1-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UF5A400D1-13?
UF5A400D1-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UF5A400D1-13 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for UF5A400D1-13?
For technical support, including UF5A400D1-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UF5A400D1-13 requirements.
6.How does Aetrix verify that UF5A400D1-13 is sourced from the original manufacturer or authorized distributors?
All UF5A400D1-13 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that UF5A400D1-13 meets industry standards.
7.What is the process for return or replacement of UF5A400D1-13?
All UF5A400D1-13 units undergo pre-shipment inspection (PSI). If there is an issue with UF5A400D1-13, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The UF5A400D1-13 part is unused and in its original packaging.
Return procedure for UF5A400D1-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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