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Taiwan Semiconductor Corporation SR320
- Part No.:
- SR320
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
SR320.pdf
- Description:
- DIODE SCHOTTKY 200V 3A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:5,947
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Product details
Overview
SR320 from Taiwan Semiconductor is a 200 V, 3 A Schottky barrier rectifier in DO-201AD package, featuring 0.95 V forward voltage at 3 A and 2 mA reverse leakage at 125 °C, designed for high-efficiency DC/DC converters and automotive-grade power supplies.
For engineers reviewing the SR320 datasheet, SR320 pinout, SR320 application, or SR320 equivalent, key selection criteria include its 200 V repetitive peak reverse voltage, AEC-Q101 qualification (SR320H variant), 80 A surge current rating, and thermal resistance of 15 °C/W junction-to-case - critical for thermally constrained SMPS designs.
Technical Context
The SR320 operates as a single-die, unidirectional Schottky rectifier with cathode-band polarity marking and pure tin-plated leads compliant with J-STD-002 solderability. Its guard ring structure provides overvoltage protection, while the DO-201AD case meets UL 94V-0 flammability rating.
Rated for TJ = –55 °C to +150 °C operation, it delivers 10,000 V/µs critical dv/dt immunity and exhibits 50 °C/W junction-to-ambient thermal resistance under standard PCB mounting conditions - enabling reliable performance in compact, convection-cooled power stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - maximum repetitive reverse blocking voltage; defines safe operating limit in flyback or boost output rectification |
| IF | 3 A - continuous average forward current; supports sustained 36 W conduction loss budget at VF ≈ 0.95 V |
| IFSM | 80 A - non-repetitive surge rating; withstands 8.3 ms half-sine transients common in AC line start-up or load dump events |
| VF @ 3 A, 25°C | 0.95 V - low forward drop reduces conduction losses by ~30% vs. comparable Si diodes, improving system efficiency |
| IR @ 200 V, 125°C | 2 mA - reverse leakage at max junction temperature; enables stable operation in high-ambient automotive under-hood environments |
| RθJC | 15 °C/W - junction-to-case thermal resistance; allows direct heatsinking via cathode tab for thermal management in high-power density layouts |
Pinout & Package
Package: DO-201AD - axial-leaded, molded plastic case with cathode band marking; 1.10 g weight; UL 94V-0 rated compound; RoHS and halogen-free compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (lead without band) | Forward current entry point | Connected to lower-potential node (e.g., switch node in synchronous buck); requires low-inductance layout to minimize ringing |
| Cathode (lead with band) | Forward current exit / reverse blocking terminal | Connected to output rail; serves as thermal interface when mounted to heatsink; polarity must be verified before PCB assembly |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified variant (SR320H) | Validated for automotive power modules requiring extended temperature cycling, vibration, and humidity reliability per JESD22 standards |
| Guard ring overvoltage protection | Prevents premature edge breakdown under transient voltage stress, extending device lifetime in unregulated input applications |
| 10,000 V/µs dv/dt rating | Ensures stable commutation in fast-switching topologies (e.g., >100 kHz resonant converters) without false turn-on |
| Pure tin plating, J-STD-002 compliant | Guarantees robust solder wetting and intermetallic formation on OSP- or ENIG-finished PCBs across multiple reflow cycles |
Applications
| Automotive DC/DC Converter | Industrial SMPS Output Rectifier |
|---|---|
Use Scenario: 12 V to 5 V/3.3 V step-down converter in ADAS camera module with ambient temperature up to 125 °C. IC Role / Device Role / Timing Role: Primary output rectifier replacing Si diode to reduce conduction loss and thermal load on PCB. Use Value: 0.95 V VF at 3 A lowers power dissipation by 1.2 W vs. Si alternative, enabling smaller heatsink and meeting AEC-Q100 Grade 2 thermal requirements. | Use Scenario: 48 V to 12 V telecom power supply with 80 A peak surge during hot-swap insertion. IC Role / Device Role / Timing Role: Secondary-side freewheeling diode handling repetitive 3 A DC plus 80 A surge pulses. Use Value: 80 A IFSM rating and 15 °C/W RθJC allow direct mounting to chassis, eliminating discrete heatsink and reducing BOM count. |
| USB-C PD Adapter | LED Driver Power Stage |
Use Scenario: 20 V output stage in 65 W GaN-based USB-C PD adapter operating at 200 kHz switching frequency. IC Role / Device Role / Timing Role: Synchronous rectifier replacement in secondary-side topology, leveraging low VF and fast recovery. Use Value: 0.95 V VF minimizes conduction loss at full load; 10,000 V/µs dv/dt immunity prevents spurious conduction during fast gate-drive transitions. | Use Scenario: Constant-current LED driver for street lighting with 200 V bus and 3 A string current. IC Role / Device Role / Timing Role: High-voltage output rectifier in flyback-derived topology with wide input voltage range. Use Value: 200 V VRRM rating ensures margin against reflected transients; 2 mA IR at 125 °C maintains regulation stability under full-load thermal stress. |
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-3EWH02-M3/57T | 200 V, 3 A, VF = 0.82 V @ 3 A, DO-214AA (SMA) package, no AEC-Q101 option | Surface-mount only; lower thermal resistance but no axial-leaded drop-in replacement | Preferred for space-constrained PCBs where reworkability and through-hole mounting are not required |
| ON Semiconductor SB320-E3/57T | 200 V, 3 A, VF = 0.93 V @ 3 A, DO-201AD, AEC-Q101 available (SB320HE3/57T), higher IR (5 mA @ 125 °C) | Same package and pinout; slightly lower VF but elevated leakage impacts high-temp regulation accuracy | Valid drop-in alternative when AEC-Q101 compliance is mandatory and leakage sensitivity is low |
Compared with SR320, VS-3EWH02-M3/57T offers better VF but requires SMT redesign, while SB320HE3/57T matches form-factor and qualification but trades off leakage performance for broader automotive acceptance.
Availability
SR320 is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial SMPS output rectification, and USB-C PD adapters requiring stable component supply and long-term production continuity.
Supply support for SR320 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 for industrial and automotive markets.
The SR302–SR320 series was developed to deliver high-reliability, AEC-Q101-qualified Schottky rectifiers with optimized VF–VRRM trade-offs for next-generation 48 V and 400 V automotive power architectures.
FAQ
What is the maximum junction temperature rating for the SR320?
The SR320 has a maximum junction temperature (TJ) rating of +150 °C, validated across its full operating range from –55 °C to +150 °C. This rating applies to all variants including the AEC-Q101-qualified SR320H. The SR320's thermal design must ensure that actual junction temperature under worst-case load and ambient conditions remains below this limit to maintain reliability and parametric stability.
Does the SR320 have AEC-Q101 qualification?
The base SR320 part is not AEC-Q101 qualified; however, the SR320H variant - identified by the "H" suffix in the ordering code - is fully AEC-Q101 qualified and tested per stress test conditions defined in the standard. Engineers selecting for automotive applications must specify SR320H to meet qualification requirements, as the base SR320 lacks the required reliability documentation and test reports.
What is the forward voltage of the SR320 at 3 A and 125 °C?
The SR320 forward voltage (VF) is specified at 25 °C in the datasheet (0.95 V @ 3 A), but VF decreases with rising junction temperature. While no exact VF value is published at 125 °C, typical Schottky behavior shows ~10–15% reduction - estimating ~0.81–0.85 V. For precise thermal modeling, use the VF vs. TJ curve in Figure 4 of the SR302–SR320 datasheet, which confirms monotonic decrease across the full temperature range.
Can the SR320 replace a silicon PN rectifier in an existing design?
Yes, the SR320 can replace a silicon PN rectifier in many cases due to its lower forward voltage and faster recovery, but attention must be paid to reverse leakage and thermal derating. At 125 °C, the SR320 exhibits 2 mA IR versus <1 µA for Si - potentially affecting light-load regulation. Also, its 150 °C TJ max differs from typical 150 °C Si parts, requiring verification of thermal margin using RθJC = 15 °C/W.
What packaging options are available for the SR320?
The SR320 is offered in DO-201AD package with two standard packing formats: 1,250 units per tape-and-reel (ordering code SR320 or SR320H) and 500 units per ammo box (ordering code SR320A0G or SR320HA0G). The "H" suffix denotes AEC-Q101 qualification, and "A0G" indicates green compound and lead-free finish - both compliant with RoHS and IEC 61249-2-21 halogen-free requirements.
SR320 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):
- 200 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 950 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 µA @ 200 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -55°C ~ 150°C
SR320 FAQ
1.How can I place an order for SR320 through Aetrix?
Please submit a Request for Quotation (RFQ) for SR320 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 SR320 reliable?
The price and inventory of SR320 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR320 is usually 5 days.
3.What payment methods are accepted for SR320?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR320 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SR320?
SR320 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SR320 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 SR320?
For technical support, including SR320 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR320 requirements.
6.How does Aetrix verify that SR320 is sourced from the original manufacturer or authorized distributors?
All SR320 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 SR320 meets industry standards.
7.What is the process for return or replacement of SR320?
All SR320 units undergo pre-shipment inspection (PSI). If there is an issue with SR320, 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 SR320 part is unused and in its original packaging.
Return procedure for SR320:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SR320 Tags
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BAV21W-7-F
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