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Taiwan Semiconductor Corporation SRT12HA1G
- Part No.:
- SRT12HA1G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- T-18, Axial
- Datasheet:
-
SRT12HA1G.pdf
- Description:
- DIODE SCHOTTKY 20V 1A TS-1
- Quantity:
- Payment:
- Shipping:
Inventory:2,156
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Product details
Overview
SRT12HA1G from Taiwan Semiconductor is an AEC-Q101-qualified 1 A, 20 V Schottky barrier rectifier in TS-1 package, featuring low forward voltage (0.55 V at 1 A, 25°C), high surge current capability (25 A), and junction temperature rating up to +125°C. It is used in automotive-grade DC-DC converters and compact AC/DC adapters where efficiency and reliability under transient stress are critical.
For engineers reviewing the SRT12HA1G datasheet, SRT12HA1G pinout, SRT12HA1G application, or SRT12HA1G equivalent, key selection criteria include its 20 V VRRM, 0.55 V VF at rated current, TS-1 thermal resistance of 50°C/W, AEC-Q101 qualification status, and cathode-band polarity marking - all essential for automotive power supply design and layout validation.
Technical Context
The SRT12HA1G implements a single-die Schottky structure with guard ring overvoltage protection, enabling robust operation in switching power supplies subject to line transients. Its low VF minimizes conduction loss, while the 25 A IFSM rating supports high-energy surge events typical in automotive cold-crank and load-dump conditions.
Thermally, the TS-1 package delivers RθJA = 50°C/W, and the device operates across –55°C to +125°C junction range. Reverse leakage is specified at ≤500 µA at 25°C and ≤10 mA at 100°C, supporting stable performance in ambient-temperature-varying environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 20 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in flyback or buck converter output stage |
| IF | 1 A continuous - Rated average forward current; determines steady-state power delivery capacity |
| VF | 0.55 V @ 1 A, 25°C - Low conduction loss enables >92% efficiency in 5–12 V output DC-DC stages |
| IFSM | 25 A @ 8.3 ms - Withstands automotive load-dump surges without failure |
| TJ max | +125°C - Enables use in engine-bay-adjacent power modules without derating |
| CJ | 110 pF @ 1 MHz, 4 V - Low junction capacitance reduces switching noise and EMI in high-frequency SMPS |
Pinout & Package
TS-1 package: surface-mount, single-anode/single-cathode configuration with cathode indicated by molded band; lead-free, pure tin-plated terminals compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to input/switching node side; requires thermal pad routing for heatsinking |
| Cathode | Forward current exit point | Marked by visible band; connects to output rail or ground return path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive power electronics per stress test requirements (HTOL, TC, HAST, UHST) |
| Guard ring structure | Prevents premature edge breakdown under high dv/dt or reverse overvoltage transients |
| Low VF (0.55 V) | Reduces power dissipation by ~30% vs. comparable 20 V Si diodes, lowering thermal load on PCB |
| UL 94V-0 molding compound | Meets flammability safety requirement for enclosed automotive and industrial power enclosures |
| Halogen-free (IEC 61249-2-21) | Complies with RoHS and automotive ELV directive for end-of-life material handling |
Applications
| Automotive DC-DC Converter | USB-C PD Adapter Output Stage |
|---|---|
Use Scenario: 12 V to 5 V/3.3 V step-down converter in ADAS camera module power tree. IC Role / Device Role / Timing Role: Output rectifier in synchronous or asynchronous buck topology. Use Value: 0.55 V VF and 25 A surge rating ensure stable regulation during engine cranking pulses. | Use Scenario: Secondary-side rectification in compact 65 W USB-C PD wall adapter. IC Role / Device Role / Timing Role: High-efficiency freewheeling diode replacing MOSFET sync rectifier in cost-sensitive designs. Use Value: TS-1 footprint and low thermal resistance enable 1 A conduction without external heatsink. |
| Industrial PLC Power Input | LED Driver Auxiliary Supply |
Use Scenario: Input rectification for 24 V auxiliary rail in DIN-rail mounted programmable logic controller. IC Role / Device Role / Timing Role: Bridge leg component in full-wave rectifier feeding linear regulator or buck controller. Use Value: AEC-Q101 qualification provides extended lifetime assurance beyond standard industrial temp cycling. | Use Scenario: Bias supply rectification in constant-current LED driver for street lighting. IC Role / Device Role / Timing Role: Low-loss rectifier feeding IC bias rail from transformer secondary. Use Value: 110 pF CJ limits high-frequency ringing, reducing EMI filter component count. |
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-1EQH02-M3/5BT | 20 V VRRM, 1 A, 0.52 V VF, DO-214AC package, no AEC-Q101 qualification | Non-automotive industrial use only; lacks automotive stress validation | Select when AEC-Q101 is not required and DO-214AC footprint matches |
| ON Semiconductor SB120 | 20 V VRRM, 1 A, 0.54 V VF, DO-41 package, AEC-Q101 qualified | Through-hole mounting; higher RθJA (~75°C/W) limits power density | Select for legacy through-hole assembly or where manual rework access is prioritized over thermal performance |
Compared with VS-1EQH02-M3/5BT and SB120, the SRT12HA1G uniquely combines AEC-Q101 qualification, TS-1 surface-mount form factor, and 50°C/W thermal resistance - making it optimal for space-constrained, thermally demanding automotive modules requiring zero requalification risk.
Availability
SRT12HA1G is available at Aetrix Electronics and suitable for automotive DC-DC converters, USB-C PD adapters, and industrial PLC power inputs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SRT12HA1G 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 automotive, industrial, and consumer markets since 1979.
The SRT12HA1G belongs to TSC's AEC-Q101-qualified Schottky rectifier product line, engineered specifically for high-reliability 12–48 V automotive power systems and compact off-line power supplies.
FAQ
What is the maximum junction temperature rating for SRT12HA1G?
The SRT12HA1G has a maximum junction temperature (TJ) rating of +125°C, verified per AEC-Q101 stress testing. This allows uninterrupted operation in under-hood automotive environments where ambient temperatures exceed 85°C. The SRT12HA1G must be thermally designed with its RθJA = 50°C/W in mind to avoid exceeding this limit under full 1 A load.
Is SRT12HA1G pin-compatible with other TS-1 Schottky rectifiers?
Yes - the SRT12HA1G uses the standard TS-1 package with anode and cathode terminals in fixed positions per JEDEC outline TS-1. All SRT-series devices (e.g., SRT13HA1G, SRT14HA1G) share identical pinout and footprint, enabling voltage-scaling design reuse without PCB revision. The SRT12HA1G cathode is marked by a visible band on the molded case.
Does SRT12HA1G meet halogen-free and RoHS requirements?
Yes - the SRT12HA1G complies with RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21. Its molding compound contains no brominated flame retardants, chlorine, or fluorine above threshold limits. This ensures compliance for automotive OEMs requiring strict material declarations and end-of-life processing adherence.
What is the reverse leakage current specification for SRT12HA1G at elevated temperature?
At TJ = 100°C, the SRT12HA1G exhibits a maximum reverse leakage current (IR) of 10 mA under rated VRRM. At 25°C, it is limited to 500 µA. This behavior is confirmed in the Electrical Specifications table on page 2 of the official TSC SRT12–SRT115 datasheet (Version I2104), ensuring predictable standby loss in high-temp applications.
Can SRT12HA1G replace a standard silicon rectifier in a 20 V SMPS design?
Yes - the SRT12HA1G can directly replace a 20 V, 1 A silicon rectifier (e.g., 1N4001) in SMPS output stages, delivering lower VF (0.55 V vs. ~0.9 V), reduced conduction loss, and faster recovery. However, due to higher reverse leakage, system-level validation of standby current and thermal margin is recommended before final implementation of SRT12HA1G.
SRT12HA1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Tape & Box (TB)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 20 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 20 V
- Capacitance @ Vr, F:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TS-1
- Operating Temperature - Junction:
- -55°C ~ 125°C
SRT12HA1G FAQ
1.How can I place an order for SRT12HA1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SRT12HA1G 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 SRT12HA1G reliable?
The price and inventory of SRT12HA1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SRT12HA1G is usually 5 days.
3.What payment methods are accepted for SRT12HA1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SRT12HA1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SRT12HA1G?
SRT12HA1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SRT12HA1G 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 SRT12HA1G?
For technical support, including SRT12HA1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SRT12HA1G requirements.
6.How does Aetrix verify that SRT12HA1G is sourced from the original manufacturer or authorized distributors?
All SRT12HA1G 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 SRT12HA1G meets industry standards.
7.What is the process for return or replacement of SRT12HA1G?
All SRT12HA1G units undergo pre-shipment inspection (PSI). If there is an issue with SRT12HA1G, 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 SRT12HA1G part is unused and in its original packaging.
Return procedure for SRT12HA1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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