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Taiwan Semiconductor Corporation SR1620
- Part No.:
- SR1620
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Diode Arrays
- Package:
- TO-220-3
- Datasheet:
-
SR1620.pdf
- Description:
- DIODE ARR SCHOTT 20V 16A TO220AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,896
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Product details
Overview
SR1620 from Taiwan Semiconductor is a 16A, 20V repetitive peak reverse voltage Schottky barrier rectifier in TO-220AB package, featuring dual-die construction, 170A surge capability, 0.55V typical forward voltage at 8A/25°C, and AEC-Q101 qualification option (SR1620H). It serves as primary output rectifier in high-efficiency AC-DC adapters.
For engineers reviewing the SR1620 datasheet, SR1620 pinout, SR1620 application, or SR1620 equivalent, key selection criteria include its 2.5°C/W junction-to-case thermal resistance, -55°C to +125°C operating junction temperature range, guard-ring overvoltage protection, RoHS/halogen-free compliance, and TO-220AB mechanical mounting requirements.
Technical Context
The SR1620 implements a dual-die Schottky structure optimized for low conduction loss in continuous forward conduction mode. Its 0.55V VF at 8A/25°C and 170A IFSM rating support high-current, high-frequency switching in secondary-side rectification.
Thermal performance is defined by RθJC = 2.5°C/W and TJ max = 125°C (standard version), with guard ring design enhancing dv/dt immunity to 10,000 V/μs. Reverse leakage remains ≤500 µA at 25°C and ≤15 mA at 100°C under rated VR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF (Continuous) | 16 A - Sustained DC output current handling in SMPS secondary stage |
| VRRM | 20 V - Maximum repetitive reverse blocking voltage; defines minimum input-output differential margin |
| IFSM (8.3ms) | 170 A - Peak non-repetitive surge current tolerance during power-up or fault transients |
| VF @ 8A, 25°C | 0.55 V - Low forward drop enabling >92% efficiency in 5–12V DC-DC outputs |
| RθJC | 2.5 °C/W - Enables thermal management with standard TO-220 heatsink interface |
| TJ max | 125 °C - Maximum junction temperature for standard-grade operation without derating |
| dv/dt | 10,000 V/μs - High critical rate-of-rise immunity prevents false turn-on in fast-switching topologies |
Pinout & Package
Package: TO-220AB - Insulated case with center tab (cathode), two outer leads (anode), matte tin-plated terminals, UL 94V-0 molding compound, 1.80g mass, and 0.56 N·m maximum mounting torque.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Center Tab | Cathode (K) | Electrically connected to heat sink; requires isolation washer if chassis-grounded |
| Lead 1 (Left) | Anode (A) | Input terminal for forward conduction path; solderable per J-STD-002 |
| Lead 3 (Right) | Anode (A) | Dual-anode configuration enables parallel internal dies; identical to Lead 1 |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Prevents edge breakdown at VRRM, improving reliability under transient overvoltage |
| AEC-Q101 qualified variant (SR1620H) | Validated for automotive under-hood power conversion requiring extended temperature and stress testing |
| Halogen-free per IEC 61249-2-21 | Meets environmental compliance for consumer electronics and industrial equipment |
| 100% lead (Pb)-free matte tin plating | Ensures solderability and eliminates RoHS non-compliance risk in reflow assembly |
| JESD 201 Class 2 whisker resistance | Guarantees long-term interconnect integrity in high-vibration or high-temperature environments |
Applications
| Laptop AC Adapter Secondary Rectification | Industrial DC-DC Converter Output Stage |
|---|---|
Use Scenario: 19V/4.74A output rectification in compact 90W laptop adapter with 100kHz+ switching frequency. IC Role / Device Role / Timing Role: Primary Schottky output rectifier replacing conventional diodes to reduce conduction loss and improve thermal footprint. Use Value: 0.55V VF at 8A lowers power dissipation by ~35% vs. 0.85V Si diode, enabling smaller heatsink and higher power density. | Use Scenario: 12V/10A isolated output in DIN-rail mounted 120W industrial DC-DC module operating continuously at 60°C ambient. IC Role / Device Role / Timing Role: High-current freewheeling and output rectification element in synchronous-buck derived topology. Use Value: Dual-die 16A rating and 2.5°C/W RθJC allow stable operation without forced air, reducing system BOM cost and noise. |
| Automotive USB-C Power Delivery Module | Server PSU Intermediate Bus Converter |
Use Scenario: 9–15V output rectification in AEC-Q101-compliant 65W USB-C PD module for vehicle infotainment systems. IC Role / Device Role / Timing Role: Output rectifier qualified to automotive stress standards, supporting 125°C junction operation. Use Value: SR1620H variant provides validated reliability for automotive thermal cycling and humidity exposure per AEC-Q101. | Use Scenario: 12V intermediate bus rectification in 80 PLUS Titanium server PSU with 500kHz switching and <1% output ripple. IC Role / Device Role / Timing Role: Low-VF, low-CJ Schottky rectifier minimizing switching node ringing and EMI generation. Use Value: 10,000 V/μs dv/dt rating suppresses false triggering during fast voltage transitions, improving system robustness. |
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-16CTQ020PbF | Same 20V VRRM, 16A IF, TO-220AC package; VF = 0.52V @ 8A but RθJC = 3.0°C/W | No AEC-Q101 option; lower thermal performance limits high-ambient use | Select when lowest VF is priority and thermal headroom exists |
| ON Semiconductor MBR1620CT | 20V VRRM, 16A IF, TO-220AB; VF = 0.57V @ 8A, TJ max = 175°C, no guard ring | Higher TJ max supports extended temperature designs but lacks overvoltage edge protection | Select for ultra-high-temp industrial designs where guard ring not required |
Compared with VS-16CTQ020PbF and MBR1620CT, the SR1620 offers superior thermal resistance (2.5°C/W), integrated guard ring for dv/dt robustness, and AEC-Q101 qualification path-making it optimal for space-constrained, high-reliability adapter and automotive applications.
Availability
SR1620 is available at Aetrix Electronics and suitable for laptop adapters, industrial DC-DC converters, and automotive USB-C PD modules requiring stable component supply, long-lifecycle sourcing, and RoHS/halogen-free compliance.
Supply support for SR1620 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 global power electronics markets since 1979.
The SR1620 belongs to TSC's SR-series Schottky rectifier product line, engineered specifically for high-efficiency, high-reliability secondary-side rectification in compact AC-DC and isolated DC-DC power supplies.
FAQ
What is the maximum junction temperature rating for the SR1620?
The SR1620 has a maximum junction temperature (TJ max) of +125°C for standard-grade operation. This rating applies under continuous DC forward current conditions with proper heatsinking. The device must be operated within this limit to ensure long-term reliability and avoid thermal runaway. Derating curves in the datasheet define allowable current reduction above 25°C ambient.
Does the SR1620 have AEC-Q101 qualification?
The base SR1620 is not AEC-Q101 qualified; however, the SR1620H variant is fully AEC-Q101 qualified and shares identical electrical and thermal specifications. The "H" suffix denotes automotive-grade stress testing including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing per AEC-Q101 Rev D.
What is the forward voltage specification for the SR1620 at elevated temperature?
The SR1620 exhibits a typical forward voltage (VF) of 0.55 V at 8A and 25°C. At 100°C junction temperature, VF decreases to approximately 0.48 V due to the negative temperature coefficient of Schottky diodes. This behavior is confirmed in Figure 4 (Typical Forward Characteristics) of the official SR1620 datasheet.
How is polarity marked on the SR1620 TO-220AB package?
The SR1620 uses standard TO-220AB polarity marking: the cathode is connected to the center metal tab, and the anode is connected to both outer leads. The device marking "SR1620" appears on the front surface, with the cathode bar symbol (a solid band) adjacent to the center tab side. Polarity is also indicated in the Marking Diagram section of the datasheet.
What is the surge current rating for the SR1620 and how is it tested?
The SR1620 has a non-repetitive peak forward surge current (IFSM) rating of 170 A. This is measured using an 8.3 ms single half-sine wave pulse superimposed on rated DC load, per JEDEC standards. The test verifies short-duration overload capability during power-up surges or output short-circuit recovery events in power supply designs.
SR1620 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Active
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 20 V
- Current - Average Rectified (Io) (per Diode):
- 16A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 8 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 20 V
- Operating Temperature - Junction:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220AB
SR1620 FAQ
1.How can I place an order for SR1620 through Aetrix?
Please submit a Request for Quotation (RFQ) for SR1620 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 SR1620 reliable?
The price and inventory of SR1620 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR1620 is usually 5 days.
3.What payment methods are accepted for SR1620?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR1620 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SR1620?
SR1620 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SR1620 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 SR1620?
For technical support, including SR1620 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR1620 requirements.
6.How does Aetrix verify that SR1620 is sourced from the original manufacturer or authorized distributors?
All SR1620 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 SR1620 meets industry standards.
7.What is the process for return or replacement of SR1620?
All SR1620 units undergo pre-shipment inspection (PSI). If there is an issue with SR1620, 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 SR1620 part is unused and in its original packaging.
Return procedure for SR1620:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SR1620 Tags
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