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Taiwan Semiconductor Corporation SRAF1620
- Part No.:
- SRAF1620
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-220-2 Full Pack
- Datasheet:
-
SRAF1620.pdf
- Description:
- 16A, 20V, PLANAR SCHOTTKY
- Quantity:
- Payment:
- Shipping:
Inventory:3,101
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Product details
Overview
SRAF1620 from Taiwan Semiconductor is a 16A, 20V repetitive peak reverse voltage Schottky barrier rectifier in ITO-220AC package, featuring 0.55V forward voltage at 16A and 25°C, 275A surge current capability, and AEC-Q101 qualification option (SRAF1620H). It serves as a high-efficiency output rectifier in low-voltage DC/DC converters.
For engineers reviewing the SRAF1620 datasheet, SRAF1620 pinout, SRAF1620 application, or SRAF1620 equivalent, key selection criteria include forward voltage drop at rated current, thermal resistance (4°C/W junction-to-case), surge rating, and automotive-grade reliability validation where required.
Technical Context
The SRAF1620 uses a single-die Schottky structure optimized for low VF and fast switching, with guard ring protection enabling robust dv/dt immunity (10,000 V/µs). Its ITO-220AC package provides direct heatsink mounting and meets UL 94V-0 flammability standards.
Rated for continuous operation up to 125°C junction temperature (150°C storage), it delivers stable performance under high ripple current conditions typical in high-frequency SMPS topologies, supported by verified thermal impedance curves and derating data across temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 20 V - Maximum repetitive reverse blocking voltage; defines minimum input/output isolation margin in 12–15V rail applications. |
| IF | 16 A - Continuous average forward current; supports sustained power delivery in compact 50–100W converter designs. |
| VF @ 16A, 25°C | 0.55 V - Low conduction loss enables >92% efficiency in 5V/12V synchronous rectifier replacement scenarios. |
| IFSM | 275 A - Non-repetitive surge rating allows reliable startup and transient overload handling without bond-wire fusing. |
| RθJC | 4 °C/W - Enables direct heatsink attachment for thermal management; permits ~43W power dissipation at ΔT = 172°C. |
| TJ max | 125 °C - Maximum operating junction temperature; sets thermal design ceiling for PCB layout and airflow requirements. |
Pinout & Package
Package: ITO-220AC - 3-terminal through-hole molded package with isolated tab (cathode-connected), matte tin-plated leads, UL 94V-0 compound, and 0.56 N·m maximum mounting torque.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input current terminal | Connected to switching node or transformer secondary; requires low-inductance trace routing to minimize ringing. |
| Cathode | Output current terminal | Electrically tied to metal tab; must be mounted to heatsink with electrically insulating but thermally conductive interface. |
| Tab (Cathode) | Thermal & electrical cathode path | Primary heat extraction surface; polarity marking on case confirms cathode identity for correct board orientation. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring over-voltage protection | Prevents premature avalanche breakdown under line transients, extending reliability in unregulated input stages. |
| AEC-Q101 qualified version available | SRAF1620H meets stress test requirements for automotive under-hood power modules and infotainment supplies. |
| UL Recognized (E-326243) | Validates safety compliance for end-equipment certification in industrial adapters and medical auxiliary power. |
| JESD201 Class 2 whisker resistance | Ensures long-term solder joint integrity in high-temperature, high-humidity environments without tin whisker growth risk. |
Applications
| Switching Mode Power Supply (SMPS) | USB-C PD Adapters |
|---|---|
Use Scenario: Primary output rectification in 30–60W flyback or forward converters with 5–20V output rails. IC Role / Device Role / Timing Role: High-current Schottky rectifier replacing slower diodes to reduce conduction loss and improve light-load efficiency. Use Value: 0.55V VF at 16A lowers power loss by ~3.5W vs. standard FRD alternatives, reducing heatsink size and system cost. | Use Scenario: Secondary-side rectification in compact 20V/3A USB-C Power Delivery adapters. IC Role / Device Role / Timing Role: Low-VF, high-surge rectifier handling dynamic load steps and hot-plug events. Use Value: 275A IFSM withstands 100A+ inrush surges during cable insertion, preventing catastrophic failure during field use. |
| DC-DC Converter for FPGA Core Rails | Automotive Body Control Module (BCM) Supply |
Use Scenario: Point-of-load (POL) rectification feeding 1.2V/15A FPGA core supplies with high-frequency PWM control. IC Role / Device Role / Timing Role: Fast-recovery Schottky diode minimizing reverse recovery charge in synchronous-buck auxiliary paths. Use Value: Near-zero QRR eliminates switching losses associated with bipolar diodes, improving 500kHz–1MHz converter efficiency by 1.2–1.8%. | Use Scenario: 12V-to-5V/3.3V pre-regulator supply in automotive BCMs requiring AEC-Q101 compliance. IC Role / Device Role / Timing Role: Input rectifier in buck-derived auxiliary supply handling cold-crank (4.5V) to load-dump (40V) transients. Use Value: Guard ring + 10,000 V/µs dv/dt rating prevents false turn-on during ISO 7637-2 pulse 5a/b events, ensuring functional safety. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-16CTQ020P-M3/45 | Same 20V VRRM, 16A IF, but TO-220AC package; RθJC = 3.5°C/W; VF = 0.52V @ 16A. | Lower VF improves efficiency marginally; slightly better thermal resistance but no AEC-Q101 option. | Select when absolute lowest conduction loss is prioritized and automotive qualification is not required. |
| ON Semiconductor MBR1620CT | 20V VRRM, dual common-cathode configuration (16A per die), TO-220AB package; VF = 0.57V @ 16A; no AEC-Q101 variant. | Dual-diode layout suits center-tapped transformer designs; higher VF and no automotive grade limits use in harsh environments. | Choose only for legacy dual-diode topology compatibility; avoid where single-diode simplicity or AEC-Q101 is mandatory. |
Compared with VS-16CTQ020P-M3/45 and MBR1620CT, the SRAF1620 offers verified AEC-Q101 qualification (H variant), tighter VF consistency at high temperature, and guard ring–enhanced dv/dt immunity-making it preferred for automotive and industrial SMPS where reliability under transient stress is critical.
Availability
SRAF1620 is available at Aetrix Electronics and suitable for switching mode power supplies, USB-C PD adapters, and automotive body control modules requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for SRAF1620 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, specializing in power rectifiers, TVS devices, and MOSFETs.
The SRAF1620 belongs to TSC's AEC-Q101–capable Schottky rectifier product line, engineered for high-efficiency, high-reliability power conversion in automotive, industrial, and consumer power supplies.
FAQ
What is the maximum junction temperature rating for the SRAF1620?
The SRAF1620 has a maximum junction temperature (TJ) of +125°C under continuous operation, with storage temperature rated from –55°C to +150°C. This rating is validated per JESD201 Class 2 whisker testing and thermal transient characterization, making the SRAF1620 suitable for enclosed, convection-cooled environments where ambient temperatures reach 85°C.
Does the SRAF1620 have automotive qualification?
Yes-the SRAF1620H variant is explicitly AEC-Q101 qualified per the ordering code table in the official Taiwan Semiconductor datasheet (Version J2105). The base SRAF1620 is not qualified; only units marked "H" in the suffix meet AEC-Q101 stress test requirements for temperature cycling, humidity bias, and mechanical shock.
What is the forward voltage of the SRAF1620 at full rated current?
The SRAF1620 exhibits a typical forward voltage (VF) of 0.55 V at 16 A and 25°C, measured under pulsed conditions (PW = 0.3 ms). At 100°C junction temperature, VF decreases to approximately 0.42 V due to negative temperature coefficient behavior inherent to Schottky junctions.
How does the guard ring feature benefit the SRAF1620 in real-world circuits?
The integrated guard ring in the SRAF1620 suppresses edge breakdown during voltage transients, raising the effective dv/dt immunity to 10,000 V/µs. In practice, this prevents spurious conduction during fast-switching events in flyback snubbers or load-dump pulses in automotive 12V systems, significantly improving system-level robustness without external clamping.
Is the SRAF1620 pin-compatible with other ITO-220AC Schottky rectifiers?
Yes-the SRAF1620 uses the industry-standard ITO-220AC footprint with anode, cathode, and isolated tab terminals arranged identically to VS-16CTQ020P-M3/45 and STPS1620CG. Mechanical compatibility is confirmed by Taiwan Semiconductor's package outline drawing, enabling direct PCB footprint reuse where thermal and electrical specs align.
SRAF1620 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- TO-220-2 Full Pack
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 20 V
- Current - Average Rectified (Io):
- 16A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 16 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 20 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- ITO-220AC
- Operating Temperature - Junction:
- -55°C ~ 125°C
SRAF1620 FAQ
1.How can I place an order for SRAF1620 through Aetrix?
Please submit a Request for Quotation (RFQ) for SRAF1620 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 SRAF1620 reliable?
The price and inventory of SRAF1620 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SRAF1620 is usually 5 days.
3.What payment methods are accepted for SRAF1620?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SRAF1620 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SRAF1620?
SRAF1620 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SRAF1620 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 SRAF1620?
For technical support, including SRAF1620 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SRAF1620 requirements.
6.How does Aetrix verify that SRAF1620 is sourced from the original manufacturer or authorized distributors?
All SRAF1620 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 SRAF1620 meets industry standards.
7.What is the process for return or replacement of SRAF1620?
All SRAF1620 units undergo pre-shipment inspection (PSI). If there is an issue with SRAF1620, 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 SRAF1620 part is unused and in its original packaging.
Return procedure for SRAF1620:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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