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Taiwan Semiconductor Corporation 1N5820
- Part No.:
- 1N5820
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1N5820.pdf
- Description:
- DIODE SCHOTTKY 20V 3A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:6,462
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Product details
Overview
1N5820 from Taiwan Semiconductor is a 3A, 20V Schottky barrier rectifier in DO-201AD package, featuring 0.475V forward voltage at 3A/25°C, 70A surge capability, and AEC-Q101 qualification option (1N5820H). It serves as primary output rectifier in low-voltage DC-DC converters.
For engineers reviewing the 1N5820 datasheet, 1N5820 pinout, 1N5820 application, or 1N5820 equivalent, key selection criteria include forward voltage drop at rated current, repetitive peak reverse voltage rating, thermal resistance, surge current handling, and RoHS/halogen-free compliance for automotive and industrial power supplies.
Technical Context
The 1N5820 employs a single-die Schottky junction optimized for low-loss rectification in high-frequency switching topologies. Its 20V VRRM, 40°C/W RθJA, and 125°C maximum junction temperature support continuous operation in compact, convection-cooled SMPS designs.
Guard ring structure provides overvoltage protection, while pure tin-plated leads meet J-STD-002 solderability and JESD201 Class 2 whisker resistance. Polarity is marked by cathode band on DO-201AD case.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 20 V - Maximum repetitive reverse blocking voltage; defines safe operating range in 12–15V output rails |
| IF | 3 A - Continuous average forward current; supports 36W output at 12V with margin |
| VF | 0.475 V @ 3A, 25°C - Low conduction loss reduces heat generation vs. silicon diodes |
| IFSM | 70 A - Single half-sine surge rating enables robust start-up and transient handling |
| RθJA | 40 °C/W - Thermal resistance enables ~2.5W dissipation in standard PCB layout without heatsink |
| CJ | 200 pF @ 4V - Junction capacitance impacts high-frequency switching noise and EMI filtering design |
Pinout & Package
Package: DO-201AD axial-leaded plastic case with cathode band marking; UL 94V-0 rated molding compound; 1.10g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (lead without band) | Forward current entry point | Connected to lower-potential node (e.g., switch node in buck converter) |
| Cathode (lead with band) | Forward current exit point | Connected to output rail; polarity marking prevents reverse installation |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage | 0.475 V at 3A enables >95% efficiency in 12V-output DC-DC converters |
| Guard ring protection | Enhances ruggedness against voltage transients in automotive load-dump conditions |
| AEC-Q101 qualified variant | 1N5820H meets stress test requirements for automotive under-hood applications |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and global environmental regulations for industrial end equipment |
Applications
| SMPS Output Rectification | USB-C Power Adapter |
|---|---|
Use Scenario: Secondary-side rectification in 5–24V isolated flyback or forward converters. IC Role / Device Role / Timing Role: Unidirectional current path enabling efficient energy transfer from transformer secondary. Use Value: 0.475V VF minimizes conduction loss, directly improving full-load efficiency by ~1.2% vs. comparable silicon diodes. | Use Scenario: 20V input rectification stage in compact USB PD 3.0 adapters. IC Role / Device Role / Timing Role: Input bridge or clamp diode handling 100kHz–500kHz switching waveforms. Use Value: 70A IFSM withstands inrush surges during hot-plug events without degradation. |
| Automotive DC-DC Module | Industrial IoT Power Supply |
Use Scenario: 12V-to-5V/3.3V step-down conversion in vehicle infotainment ECUs. IC Role / Device Role / Timing Role: Synchronous rectifier replacement in cost-sensitive non-isolated buck designs. Use Value: AEC-Q101-qualified 1N5820H variant ensures reliability across -40°C to +125°C ambient operation. | Use Scenario: Auxiliary bias supply rectification in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: High-reliability discrete rectifier in long-lifecycle industrial power rails. Use Value: UL 94V-0 package and JESD201 Class 2 whisker resistance prevent field failures in vibration-prone environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STPS3L20A | 3A, 20V, TO-220AC package; 0.52V VF @ 3A; higher thermal mass but larger footprint | Preferred where board space allows and heatsinking via tab is needed | Select when higher surge tolerance and direct heatsink mounting outweigh size constraints |
| MBR320RLG | 3A, 20V, DO-201AD; 0.53V VF @ 3A; no AEC-Q101 option; slightly higher leakage at 100°C | Suitable for commercial-grade AC-DC adapters without automotive qualification needs | Choose for cost-sensitive consumer power supplies where AEC-Q101 is not required |
Compared with STPS3L20A and MBR320RLG, the 1N5820 offers the lowest forward voltage in DO-201AD form factor and unique AEC-Q101 availability-making it optimal for space-constrained, thermally limited, and automotive-qualified designs.
Availability
1N5820 is available at Aetrix Electronics and suitable for switching mode power supplies, USB-C adapters, and automotive DC-DC modules requiring stable component supply and long-term manufacturability.
Supply support for 1N5820 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving industrial, computing, and automotive markets since 1979.
The 1N58xx series targets high-efficiency, cost-optimized power conversion-designed specifically for SMPS output rectification where low VF, fast recovery, and rugged packaging are critical.
FAQ
What is the maximum junction temperature rating for the 1N5820?
The 1N5820 has a maximum junction temperature (TJ) of +125°C, with an operating range from –55°C to +125°C. This rating enables reliable use in enclosed industrial enclosures and under-hood automotive environments when derated per the forward current derating curve. Thermal design must account for its 40°C/W junction-to-ambient resistance under natural convection.
Is the 1N5820 available in an AEC-Q101 qualified version?
Yes-the 1N5820H variant is explicitly qualified to AEC-Q101 standards and marked with "H" in the ordering code. It undergoes stress testing including HTGB, HTRB, and temperature cycling to ensure reliability in automotive applications. Standard 1N5820 is not AEC-Q101 qualified; only the "H" suffix denotes qualification.
What is the forward voltage of the 1N5820 at 3A and 125°C junction temperature?
The datasheet specifies VF = 0.475 V at 3A and 25°C. While no exact value is given at 125°C, the forward voltage decreases with rising temperature in Schottky diodes-typically ~0.42–0.44 V at 125°C. Designers should verify performance using the device's forward characteristics curve (Fig.4) and apply appropriate thermal derating.
Does the 1N5820 have a guard ring, and what function does it serve?
Yes, the 1N5820 incorporates a guard ring structure to improve edge breakdown behavior and enhance overvoltage ruggedness. This feature increases reliability during transient voltage events such as load dump or inductive kickback, making it suitable for demanding power supply and automotive applications where voltage spikes exceed nominal ratings.
What packaging options are offered for the 1N5820?
The 1N5820 is supplied in DO-201AD package with two standard packing formats: 1,250 units per tape-and-reel (1N5820 or 1N5820H) and 500 units per ammo box (1N5820A0G or 1N5820HA0G). All variants use pure tin-plated leads compliant with J-STD-002 and JESD201 Class 2 whisker resistance requirements.
1N5820 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 20 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 475 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 20 V
- Capacitance @ Vr, F:
- 200pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -55°C ~ 125°C
1N5820 FAQ
1.How can I place an order for 1N5820 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5820 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 1N5820 reliable?
The price and inventory of 1N5820 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5820 is usually 5 days.
3.What payment methods are accepted for 1N5820?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5820 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5820?
1N5820 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5820 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 1N5820?
For technical support, including 1N5820 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5820 requirements.
6.How does Aetrix verify that 1N5820 is sourced from the original manufacturer or authorized distributors?
All 1N5820 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 1N5820 meets industry standards.
7.What is the process for return or replacement of 1N5820?
All 1N5820 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5820, 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 1N5820 part is unused and in its original packaging.
Return procedure for 1N5820:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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