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Taiwan Semiconductor Corporation SR509 R0G
- Part No.:
- SR509 R0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
SR509 R0G.pdf
- Description:
- DIODE SCHOTTKY 90V 5A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:7,443
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Product details
Overview
SR509 R0G from Taiwan Semiconductor is a 5A, 90V AEC-Q101-qualified Schottky barrier rectifier in DO-201AD package, featuring 0.85V forward voltage at 5A/25°C, 120A surge current capability, and 10,000 V/µs dv/dt rating-used in automotive-grade DC-DC converters and industrial SMPS.
For engineers reviewing the SR509 R0G datasheet, SR509 R0G pinout, SR509 R0G application, or SR509 R0G equivalent, key selection factors include its 90V VRRM rating, 5mA reverse leakage at 125°C, DO-201AD thermal resistance (RθJA = 35°C/W), AEC-Q101 qualification, and cathode-band polarity marking.
Technical Context
This single-die Schottky rectifier operates with junction temperatures up to +150°C and delivers low conduction loss due to its metal-semiconductor junction. Its guard ring structure provides overvoltage protection, while pure tin-plated leads ensure J-STD-002 solderability and JESD201 Class 2 whisker resistance.
The device supports high-efficiency power conversion in compact layouts: RθJC = 6°C/W enables effective heat transfer to PCB copper, and its 1.10g mass aligns with DO-201AD mechanical standards including UL 94V-0 molding compound.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 90 V - Maximum repetitive reverse voltage before breakdown; defines safe operating range in 48V–72V bus applications |
| IF | 5 A - Continuous average forward current; supports sustained 25W+ dissipation with proper heatsinking |
| VF @ 5A, 25°C | 0.85 V - Low conduction loss reduces power dissipation by ~4.3W vs. silicon diodes in same condition |
| IFSM | 120 A - Peak non-repetitive surge current for 8.3ms half-sine; handles cold-start inrush in automotive systems |
| RθJA | 35 °C/W - Junction-to-ambient thermal resistance; requires ≥2 cm² 2-oz copper pad for 125°C operation at full load |
| IR @ 90V, 125°C | 5 mA - Reverse leakage at max junction temperature; critical for standby power budgeting in always-on modules |
| dv/dt | 10,000 V/µs - Critical rate of rise immunity; prevents false turn-on in fast-switching SiC/GaN-based topologies |
Pinout & Package
DO-201AD axial-leaded package with cathode band marking; body length 9.5 mm, diameter 3.6 mm, lead spacing 5.0 mm; RoHS-compliant, halogen-free, UL 94V-0 molded compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (lead without band) | Forward current entry point | Connected to lower-potential side (e.g., ground or return path) in buck/flyback secondary |
| Cathode (lead with band) | Forward current exit point | Connected to output rail; polarity marking prevents reverse installation in automated assembly |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood use per stress test requirements (HTOL, TC, HAST, etc.) |
| Guard ring structure | Enhances edge termination robustness against transient overvoltage events beyond VRRM |
| Pure tin-plated leads | Enables lead-free reflow compatibility and eliminates whisker-induced short-circuit risk |
| Junction temperature range | -55°C to +150°C operation supports extended thermal environments in engine control units |
Applications
| Automotive DC-DC Converters | Industrial SMPS Secondary Rectification |
|---|---|
Use Scenario: High-efficiency 12V-to-5V/3.3V step-down converter in ADAS domain controller power supply. IC Role / Device Role / Timing Role: Output rectifier in synchronous or quasi-resonant flyback topology. Use Value: 0.85V VF minimizes conduction loss at 5A load, improving efficiency by ≥2% over standard silicon diodes. | Use Scenario: Secondary-side rectification in 48V telecom rectifier module with forced-air cooling. IC Role / Device Role / Timing Role: Uncontrolled rectifier delivering regulated 12V output in isolated forward converter. Use Value: 120A IFSM withstands repeated 100A surges during hot-swap events without degradation. |
| USB-C PD Adapters | Energy-Efficient LED Drivers |
Use Scenario: Compact 65W USB-C power adapter with GaN primary-side switching. IC Role / Device Role / Timing Role: Output rectifier in active-clamp flyback design operating at 200kHz. Use Value: 10,000 V/µs dv/dt rating prevents spurious conduction during fast primary-side voltage transitions. | Use Scenario: Constant-current LED driver for outdoor signage with wide ambient temperature range. IC Role / Device Role / Timing Role: Freewheeling diode in buck-derived constant-current regulator. Use Value: 5mA IR at 125°C ensures stable current regulation without thermal runaway in sealed enclosures. |
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-50SQ090 | Same DO-201AD package, 5A/90V, but VF = 0.82V @ 5A and IR = 3mA @ 125°C | No AEC-Q101 qualification; rated only to +125°C junction | Preferred where lower VF is prioritized over automotive qualification |
| ON Semiconductor SB590 | DO-201AD, 5A/90V, VF = 0.87V @ 5A, IR = 6mA @ 125°C, no AEC-Q101 | Higher leakage and no automotive stress validation | Suitable for cost-sensitive industrial adapters without automotive reliability requirements |
Compared with VS-50SQ090 and SB590, SR509 R0G uniquely combines AEC-Q101 qualification, +150°C operation, and 5mA reverse leakage at elevated temperature-making it the only option qualified for under-hood automotive power conversion where long-term reliability under thermal cycling is mandatory.
Availability
SR509 R0G is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial SMPS designs, and USB-C PD adapters requiring stable component supply, traceable sourcing, and lifecycle continuity.
Supply support for SR509 R0G 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 automotive, industrial, and consumer markets since 1979.
The SR502–SR520 series was developed specifically for high-reliability power conversion in harsh environments, emphasizing AEC-Q101 compliance, low VF, and robust surge handling across 20V–200V voltage grades.
FAQ
What is the maximum junction temperature rating for SR509 R0G?
The SR509 R0G has a maximum junction temperature (TJ) of +150°C, validated per AEC-Q101 stress testing. This allows operation in under-hood automotive environments where ambient temperatures exceed 105°C, provided thermal design maintains junction temperature below this limit using the specified RθJA = 35°C/W and appropriate PCB copper area.
Does SR509 R0G have AEC-Q101 qualification?
Yes, SR509 R0G is AEC-Q101 qualified-confirmed by Taiwan Semiconductor's ordering code suffix "R0G", where "R" denotes AEC-Q101 compliance. This qualification covers HTOL, temperature cycling, HAST, and mechanical stress tests required for automotive under-hood applications.
What is the forward voltage drop of SR509 R0G at rated current?
The SR509 R0G exhibits a maximum forward voltage (VF) of 0.85 V at 5A and 25°C, measured under pulsed conditions (PW = 0.3ms). At 125°C, VF decreases slightly due to negative temperature coefficient, supporting stable performance across wide thermal ranges.
How is polarity indicated on SR509 R0G?
Polarity on SR509 R0G is indicated by a visible cathode band on the DO-201AD package body. The lead adjacent to the band is the cathode; the opposite lead is the anode. This marking complies with JEDEC standards and ensures correct orientation during manual or automated placement.
What packaging options are available for SR509 R0G?
SR509 R0G is supplied in 500-piece ammo boxes (ordering code SR509 R0G) and 1,250-piece tape-and-reel formats (ordering code SR509H R0G). Both variants use DO-201AD packaging with green compound (G) and comply with RoHS and halogen-free requirements per IEC 61249-2-21.
SR509 R0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 90 V
- Current - Average Rectified (Io):
- 5A
- Voltage - Forward (Vf) (Max) @ If:
- 850 mV @ 5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 µA @ 90 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -55°C ~ 150°C
SR509 R0G FAQ
1.How can I place an order for SR509 R0G through Aetrix?
Please submit a Request for Quotation (RFQ) for SR509 R0G 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 SR509 R0G reliable?
The price and inventory of SR509 R0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR509 R0G is usually 5 days.
3.What payment methods are accepted for SR509 R0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR509 R0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SR509 R0G?
SR509 R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SR509 R0G 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 SR509 R0G?
For technical support, including SR509 R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR509 R0G requirements.
6.How does Aetrix verify that SR509 R0G is sourced from the original manufacturer or authorized distributors?
All SR509 R0G 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 SR509 R0G meets industry standards.
7.What is the process for return or replacement of SR509 R0G?
All SR509 R0G units undergo pre-shipment inspection (PSI). If there is an issue with SR509 R0G, 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 SR509 R0G part is unused and in its original packaging.
Return procedure for SR509 R0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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