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Diodes Incorporated DSC04065
- Part No.:
- DSC04065
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- TO-220-2
- Datasheet:
-
DSC04065.pdf
- Description:
- DIODE SIL CARB 650V 4A TO220AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,526
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Product details
Overview
DSC04065 from Diodes Incorporated is a 650 V, 4 A silicon carbide Schottky diode in TO220AC (Type WX) package, designed for high-efficiency rectification with low forward voltage (1.7 V max at 4 A, 25°C), ultra-low reverse leakage (0.45 µA typ at 650 V, 25°C), and fast recovery in power factor correction and industrial motor drive circuits.
For engineers reviewing the DSC04065 datasheet, DSC04065 pinout, DSC04065 application, or DSC04065 equivalent, key selection criteria include thermal resistance (RθJC = 6 °C/W), surge current rating (28 A, 8.3 ms), junction temperature range (–55 to +175 °C), and SiC-specific benefits like positive VF temperature coefficient and stable leakage at elevated temperatures.
Technical Context
This SiC Schottky diode replaces conventional silicon fast recovery diodes in high-frequency, high-temperature switching applications. Its zero reverse recovery charge (QC = 14 nC) eliminates switching losses associated with minority-carrier storage, enabling higher efficiency in PFC boost stages and inverter freewheel paths.
The device operates with a fixed two-terminal structure-cathode and anode-requiring no gate drive or control logic. Its thermal design relies on direct case-to-heatsink conduction via the TO220AC metal tab, supported by low RθJC (6 °C/W) and RθJL (4 °C/W) values measured per JESD-51 on a fin-type heatsink.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 650 V - Maximum blocking voltage before avalanche; enables use in 400 V AC input PFC and 600 V DC bus inverters. |
| IO | 4 A - Average rectified output current at TC = 25°C; derates to ~2.5 A at TC = 125°C per Fig.1. |
| VF (max) | 1.7 V @ 4 A, 25°C - Low conduction loss reduces power dissipation vs. Si FRDs; rises to 2.5 V at 175°C but remains stable. |
| IR (typ) | 0.45 µA @ 650 V, 25°C - Ultra-low leakage ensures minimal standby loss and stable operation up to 175°C junction. |
| QC | 14 nC - Total capacitive charge during reverse recovery; enables clean turn-off with minimal EMI in >100 kHz SMPS. |
| RθJC | 6 °C/W - Thermal resistance from junction to case; allows 28 W power dissipation with ≤168°C ΔT to heatsink at rated IO. |
| IFSM | 28 A (8.3 ms half-sine) - Surge capability supports inrush and fault currents in UPS and motor drive DC links. |
Pinout & Package
Package: TO220AC (Type WX), 3-terminal molded plastic package with insulated tab; leadframe material is copper with matte tin finish; UL 94V-0 rated compound; weight ≈1.868 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Current entry point under forward bias | Connected to AC/switching node side in bridge or boost rectifier; requires low-inductance layout to minimize ringing. |
| Cathode (Lead 2) | Current exit point under forward bias | Connected to output/bus side; electrically tied to metal tab (Lead 3) - must be isolated from heatsink unless system ground referenced. |
| Metal Tab (Lead 3) | Thermal and electrical connection to cathode | Provides primary heat path to heatsink; electrically identical to cathode - isolation hardware required if heatsink is not at cathode potential. |
Key Features
| Feature | Design Value |
|---|---|
| SiC Schottky construction | Zero reverse recovery charge (Qrr = 0) eliminates tail current and associated switching losses. |
| Positive VF temperature coefficient | VF increases with temperature - enables inherent current sharing in parallel configurations without external balancing. |
| High-temperature operation | Junction rated to +175°C - supports compact thermal design in enclosed industrial drives and UPS systems. |
| Low RθJC and RθJL | 6 °C/W and 4 °C/W respectively - maximizes power handling within TO220AC mechanical constraints. |
| Green, RoHS-compliant packaging | Halogen- and antimony-free molding compound (<900 ppm Br/Cl, <1000 ppm Sb); meets EU RoHS 2015/863/EU. |
Applications
| Power Factor Correction (PFC) | Industrial Motor Drives |
|---|---|
Use Scenario: Boost-stage output rectifier in continuous conduction mode (CCM) PFC front-end for 3 kW server PSUs. IC Role / Device Role / Timing Role: High-frequency unidirectional current path with near-zero reverse recovery to minimize boost switch turn-on loss. Use Value: Enables >98% efficiency at 100 kHz switching with reduced heatsink size versus Si FRD alternatives. | Use Scenario: Freewheel diode across IGBTs in 7.5 kW variable frequency drive output stage. IC Role / Device Role / Timing Role: Provides low-loss path for inductive kickback during IGBT off-time; handles repetitive 4 A average and 28 A surge currents. Use Value: Reduces conduction loss by 35% vs. 650 V Si FRD, lowering junction temperature rise by ~22°C at full load. |
| Uninterruptible Power Supplies (UPS) | Switch-Mode Power Supplies (SMPS) |
Use Scenario: Output rectifier in double-conversion online UPS DC/DC stage operating at 50–100 kHz. IC Role / Device Role / Timing Role: Blocks reverse current from battery bank while conducting forward current during mains-fail operation. Use Value: Stable 0.45 µA leakage at 650 V ensures negligible standby drain over 24-hour battery hold-up time. | Use Scenario: Secondary-side synchronous rectifier replacement in 1 kW telecom rectifier with 300 kHz LLC resonant topology. IC Role / Device Role / Timing Role: Rectifies high-frequency AC from transformer secondary; leverages fast recovery to avoid cross-conduction with synchronous FETs. Use Value: 14 nC QC minimizes reverse recovery-induced voltage spikes, reducing snubber losses and EMI filter burden. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SiC Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DSC04A065 | Same 650 V/4 A rating; improved QC (12 nC), lower VF (1.65 V max), and updated process - recommended for new designs per Diodes notice. | Drop-in compatible in TO220AC footprint; optimized for higher-frequency PFC (>150 kHz) and tighter thermal margins. | Select for new designs requiring extended lifecycle support and marginally better efficiency. |
| STP4S65DLF | 650 V/4 A SiC Schottky; VF = 1.7 V max at 4 A, 25°C; RθJC = 5.5 °C/W; slightly lower IFSM (25 A). | Qualified to AEC-Q101; suitable for automotive-grade industrial converters where qualification traceability is mandatory. | Choose when AEC-Q101 compliance or STMicroelectronics supply chain alignment is required. |
Compared with DSC04A065, this part offers marginally higher QC and VF, reflecting its legacy process; versus STP4S65DLF, it lacks AEC-Q101 qualification but provides superior surge rating and identical thermal performance in non-automotive industrial use cases.
Availability
DSC04065 is available at Aetrix Electronics and suitable for power factor correction, industrial motor drivers, and uninterruptible power supplies requiring stable component supply despite its "not recommended for new designs" status.
Supply support for DSC04065 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 DSC series targets high-reliability SiC power rectification, specifically engineered for industrial and computing power systems demanding high efficiency, thermal robustness, and long-term stability at elevated temperatures.
FAQ
Is DSC04065 pin-compatible with standard TO220AC diodes?
Yes - DSC04065 uses the industry-standard TO220AC (Type WX) outline with three terminals: anode (lead 1), cathode (lead 2), and electrically connected metal tab (lead 3). Mounting hole spacing, lead pitch, and tab dimensions match JEDEC TO220AC specifications, enabling direct mechanical replacement in existing PCB footprints.
What is the maximum allowable junction temperature during continuous operation?
The absolute maximum junction temperature is +175°C, and the device is characterized for continuous operation across –55°C to +175°C. Derating curves (Fig.1) confirm 4 A average current is sustainable only up to ~75°C case temperature; at 125°C case, rated current drops to approximately 2.5 A to maintain safe junction limits.
Does DSC04065 require a heatsink in typical 4 A applications?
Yes - at 4 A and 25°C case temperature, power dissipation is ~6.8 W (VF × IF). With RθJC = 6 °C/W, junction temperature would reach ~66°C above case - exceeding safe limits without thermal management. A finned heatsink (e.g., 40 mm × 23 mm × 15.9 mm per datasheet test condition) is required for sustained full-load operation.
Why is DSC04065 marked "not recommended for new designs"?
Diodes Incorporated has superseded DSC04065 with DSC04A065, which features process enhancements yielding lower VF, reduced QC, and improved consistency. The original part remains fully functional and supported for legacy production, but DSC04A065 is designated for all new designs per DS44299 Rev. 4-3 notice on page 1.
DSC04065 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-220-2
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- SiC (Silicon Carbide) Schottky
- Voltage - DC Reverse (Vr) (Max):
- 650 V
- Current - Average Rectified (Io):
- 4A
- Voltage - Forward (Vf) (Max) @ If:
- 1.7 V @ 4 A
- Speed:
- No Recovery Time > 500mA (Io)
- Reverse Recovery Time (trr):
- 0 ns
- Current - Reverse Leakage @ Vr:
- 170 µA @ 650 V
- Capacitance @ Vr, F:
- 149pF @ 100mV, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO220AC (Type WX)
- Operating Temperature - Junction:
- -55°C ~ 175°C
DSC04065 FAQ
1.How can I place an order for DSC04065 through Aetrix?
Please submit a Request for Quotation (RFQ) for DSC04065 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 DSC04065 reliable?
The price and inventory of DSC04065 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DSC04065 is usually 5 days.
3.What payment methods are accepted for DSC04065?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DSC04065 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DSC04065?
DSC04065 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DSC04065 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 DSC04065?
For technical support, including DSC04065 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DSC04065 requirements.
6.How does Aetrix verify that DSC04065 is sourced from the original manufacturer or authorized distributors?
All DSC04065 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 DSC04065 meets industry standards.
7.What is the process for return or replacement of DSC04065?
All DSC04065 units undergo pre-shipment inspection (PSI). If there is an issue with DSC04065, 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 DSC04065 part is unused and in its original packaging.
Return procedure for DSC04065:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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Diodes Incorporated
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