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Taiwan Semiconductor Corporation SRT12HR0G
- Part No.:
- SRT12HR0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- T-18, Axial
- Datasheet:
-
SRT12HR0G.pdf
- Description:
- DIODE SCHOTTKY 20V 1A TS-1
- Quantity:
- Payment:
- Shipping:
Inventory:2,806
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Product details
Overview
SRT12HR0G from Taiwan Semiconductor is a 1 A, 20 V AEC-Q101-qualified Schottky barrier rectifier in TS-1 package, featuring 0.55 V forward voltage at 1 A and 500 µA reverse leakage at 25°C, designed for high-efficiency DC/DC converters and automotive-grade power adapters.
For engineers reviewing the SRT12HR0G datasheet, SRT12HR0G pinout, SRT12HR0G application, or SRT12HR0G equivalent, key selection factors include its AEC-Q101 qualification, 25 A surge rating, 125°C max junction temperature, TS-1 thermal resistance of 50°C/W, and cathode-band polarity marking for reliable board-level integration.
Technical Context
This discrete Schottky diode operates as a unidirectional power rectifier with single-die construction and guard-ring overvoltage protection. Its low VF (0.55 V) and low IR (500 µA @ 25°C) directly enable reduced conduction loss and improved light-load efficiency in high-frequency switching topologies.
The TS-1 package supports lead-free soldering per J-STD-002, meets UL 94V-0 flammability, and delivers 50°C/W junction-to-ambient thermal resistance-critical for thermally constrained adapter and SMPS designs where ambient temperatures exceed 85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF (Continuous) | 1 A - Supports sustained output current in compact 5–12 W DC/DC modules without forced cooling |
| VRRM | 20 V - Rated blocking voltage suitable for 12 V input rails with margin against transient spikes |
| VF @ 1 A, 25°C | 0.55 V - Enables ≥92% conduction efficiency at 1 A, reducing heat sink requirements |
| IR @ 20 V, 25°C | 500 µA - Minimizes standby power loss in always-on auxiliary supplies |
| IFSM (8.3 ms) | 25 A - Withstands inrush surges during cold-start of buck-derived power stages |
| TJ max | 125°C - Allows operation in under-hood automotive environments without derating below 1 A |
| RθJA | 50°C/W - Permits 1 W dissipation with ≤50°C rise above ambient on standard FR-4 PCB |
Pinout & Package
TS-1 package: surface-mount, single-anode/single-cathode configuration with cathode band marking; 0.200 g mass; pure tin-plated leads compliant with JESD 201 Class 2 whisker testing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input current entry point | Connected to input rail or switch node; must handle full load current and surge transients |
| Cathode | Output current exit point | Connected to output filter capacitor or inductor; polarity marked by visible band on body |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive power electronics including engine control modules and ADAS power rails |
| Guard ring structure | Prevents premature edge breakdown under repetitive 20 V reverse bias, extending lifetime in noisy systems |
| RoHS + halogen-free | Complies with IEC 61249-2-21 and EU Directive 2011/65/EU for green manufacturing and end-of-life processing |
| UL 94V-0 molding compound | Self-extinguishing encapsulation prevents flame propagation in enclosed power supply housings |
Applications
| Automotive Body Control Module (BCM) Power Supply | USB-C PD Adapter Secondary Rectification |
|---|---|
Use Scenario: Converts 12 V battery input to regulated 5 V/3.3 V for microcontrollers and sensors in door modules and lighting controllers. IC Role / Device Role / Timing Role: Primary output rectifier in synchronous or quasi-resonant flyback converter. Use Value: 0.55 V VF reduces conduction loss by 35% vs. standard PN diodes, lowering thermal stress in sealed BCM enclosures. | Use Scenario: Rectifies secondary-side output in compact 20–30 W USB-C PD wall adapters operating at >100 kHz switching frequency. IC Role / Device Role / Timing Role: High-frequency freewheeling diode replacing MOSFET synchronous rectification where cost and layout simplicity are prioritized. Use Value: 500 µA IR at 25°C minimizes no-load power draw, helping meet DOE Level VI and CoC Tier 2 efficiency standards. |
| Industrial IoT Sensor Node DC/DC Converter | White Goods Appliance Auxiliary Power Supply |
Use Scenario: Provides isolated 3.3 V bias for wireless sensor nodes powered from 24 V industrial bus lines. IC Role / Device Role / Timing Role: Output rectifier in miniature 1 W flyback transformer-based supply with minimal BOM count. Use Value: TS-1 footprint enables <8 mm² PCB area; 125°C TJ rating ensures reliability across -40°C to +85°C ambient operating range. | Use Scenario: Supplies 5 V logic power for control boards in refrigerators, washing machines, and dishwashers. IC Role / Device Role / Timing Role: Input-stage rectifier in non-isolated buck-derived auxiliary supply fed from mains-derived DC bus. Use Value: 25 A IFSM withstands compressor motor startup surges without degradation, supporting >10-year field life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB120-E3/54 (Vishay) | Same 20 V VRRM, 1 A IF, but TO-277 package; VF = 0.52 V (slightly lower), IR = 1 mA (higher) | TO-277 has larger footprint and higher RθJA (~65°C/W); less suitable for ultra-thin adapters | Select when legacy TO-277 layout exists and slightly lower VF outweighs thermal penalty |
| SS12 (ON Semiconductor) | 20 V VRRM, 1 A IF, SMA package; VF = 0.5 V, IR = 500 µA, but not AEC-Q101 qualified | SMA lacks automotive qualification and has lower surge rating (IFSM = 15 A vs. 25 A) | Select for cost-sensitive consumer power supplies where AEC-Q101 and surge robustness are not required |
Compared with SB120-E3/54 and SS12, the SRT12HR0G uniquely combines AEC-Q101 qualification, TS-1 compactness, 25 A surge capability, and 500 µA leakage-making it optimal for space-constrained, high-reliability automotive and industrial DC/DC designs where thermal and transient performance are critical.
Availability
SRT12HR0G is available at Aetrix Electronics and suitable for automotive body control modules, USB-C PD adapters, and industrial IoT sensor node power supplies requiring stable component supply and long-term lifecycle support.
Supply support for SRT12HR0G 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 SRT12HR0G belongs to TSC's AEC-Q101-qualified Schottky rectifier product line, engineered specifically for high-efficiency, high-reliability secondary-side rectification in automotive and industrial power conversion systems.
FAQ
What does the 'H' suffix in SRT12HR0G indicate?
The 'H' in SRT12HR0G denotes AEC-Q101 qualification-verified stress testing for automotive-grade reliability including temperature cycling, humidity bias, and ESD robustness. This makes the SRT12HR0G suitable for under-hood and cabin electronics where failure modes must meet ISO 26262 functional safety prerequisites. The SRT12HR0G is not just a commercial variant with added screening; it is fully certified per AEC-Q101 Rev D test conditions.
Is SRT12HR0G compatible with lead-free reflow soldering processes?
Yes, the SRT12HR0G uses pure tin-plated leads and is rated for lead-free reflow soldering per J-STD-002. Its TS-1 package withstands peak temperatures up to 260°C for 10 seconds, matching IPC/JEDEC J-STD-020 moisture sensitivity level (MSL) 1 requirements. The SRT12HR0G also passes JESD 201 Class 2 whisker testing, ensuring long-term interconnect integrity in high-vibration automotive environments.
What is the maximum allowable continuous forward current for SRT12HR0G at 100°C ambient?
At 100°C ambient, the SRT12HR0G's maximum continuous forward current is derated to approximately 0.65 A based on its 50°C/W RθJA and 125°C TJ max. This is derived from the forward current derating curve in the official datasheet (Fig.1), where the SRT12–SRT14 group shows linear derating from 1 A at 25°C to zero at 125°C. The SRT12HR0G must be used within this limit to avoid exceeding its thermal safe operating area.
Does SRT12HR0G have a specified junction capacitance, and how does it affect high-frequency operation?
Yes, the SRT12HR0G has a typical junction capacitance (CJ) of 110 pF at 1 MHz and 4.0 V reverse bias. This value impacts switching losses and EMI in high-frequency (>100 kHz) converters: higher CJ increases turn-off loss and can degrade efficiency in QR flyback or active clamp topologies. However, the SRT12HR0G's 110 pF is optimized for balance-low enough for 300 kHz operation while maintaining low VF and robust surge capability.
How is polarity identified on the SRT12HR0G package?
Polarity on the SRT12HR0G is indicated by a distinct cathode band printed on the device body-consistent with TS-1 marking diagram in the datasheet. The banded end corresponds to the cathode terminal, which must connect toward the positive output side of the circuit. This marking is laser-etched and remains legible after reflow, enabling automated optical inspection (AOI) and preventing assembly errors in high-volume manufacturing of the SRT12HR0G.
SRT12HR0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Tape & Reel (TR)
- 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
SRT12HR0G FAQ
1.How can I place an order for SRT12HR0G through Aetrix?
Please submit a Request for Quotation (RFQ) for SRT12HR0G 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 SRT12HR0G reliable?
The price and inventory of SRT12HR0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SRT12HR0G is usually 5 days.
3.What payment methods are accepted for SRT12HR0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SRT12HR0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SRT12HR0G?
SRT12HR0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SRT12HR0G 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 SRT12HR0G?
For technical support, including SRT12HR0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SRT12HR0G requirements.
6.How does Aetrix verify that SRT12HR0G is sourced from the original manufacturer or authorized distributors?
All SRT12HR0G 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 SRT12HR0G meets industry standards.
7.What is the process for return or replacement of SRT12HR0G?
All SRT12HR0G units undergo pre-shipment inspection (PSI). If there is an issue with SRT12HR0G, 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 SRT12HR0G part is unused and in its original packaging.
Return procedure for SRT12HR0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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