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Taiwan Semiconductor Corporation SR1203HR0G
- Part No.:
- SR1203HR0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
SR1203HR0G.pdf
- Description:
- DIODE SCHOTTKY 30V 12A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:9,899
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Product details
Overview
SR1203HR0G from Taiwan Semiconductor is a 12A, 30V AEC-Q101-qualified Schottky barrier rectifier in DO-201AD package, featuring 0.55V max forward voltage at 12A/25°C, 320A surge capability, and guard ring overvoltage protection - deployed in automotive-grade DC-DC converters and SMPS secondary-side rectification.
For engineers reviewing the SR1203HR0G datasheet, SR1203HR0G pinout, SR1203HR0G application, or SR1203HR0G equivalent, key selection criteria include its 30V VRRM, AEC-Q101 qualification status, thermal resistance (RθJL = 3°C/W), cathode-band polarity marking, and DO-201AD leaded package compatibility with J-STD-002 soldering standards.
Technical Context
This device implements a single-die Schottky junction optimized for low conduction loss in high-frequency switching topologies. Its 30V repetitive peak reverse voltage (VRRM) and 21V RMS reverse rating support operation in 24V automotive and industrial DC-DC stages where fast recovery and minimal reverse recovery charge are critical.
The junction-to-lead thermal resistance of 3°C/W enables efficient heat transfer to PCB copper or heatsink via the cathode and anode leads, while the guard ring structure enhances ruggedness against transient overvoltage events without requiring external snubbers in typical 12A continuous applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 30 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in 24V system rail clamping and flyback secondary rectification |
| IF | 12 A - Continuous forward current rating at TA = 75°C; supports sustained power delivery in compact SMPS designs |
| IFSM | 320 A - Non-repetitive surge current (8.3ms); withstands inrush and fault transients in automotive cold-crank scenarios |
| VF @ 12A | ≤ 0.55 V - Forward voltage drop at full rated current and 25°C; directly reduces conduction loss and improves efficiency vs. silicon diodes |
| RθJL | 3 °C/W - Junction-to-lead thermal resistance; enables direct thermal path to PCB copper pour or heatsink without thermal vias |
| TJ max | 150 °C - Maximum junction temperature; allows operation in under-hood automotive environments with derating |
| Configuration | Single die - Monolithic Schottky structure; eliminates inter-die mismatch and ensures consistent forward characteristics |
Pinout & Package
Package: DO-201AD - Axial-leaded, molded plastic case meeting UL 94V-0; pure tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance; cathode identified by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Forward current entry point | Connected to lower-potential node (e.g., transformer secondary center-tap or ground return) in half-wave rectification |
| Cathode (Lead 2, banded end) | Forward current exit / reverse blocking terminal | Connected to output rail; polarity marking ensures correct orientation during manual or automated placement |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive power electronics per stress test requirements including HTOL, TC, UHAST - enables use in engine control, ADAS, and body electronics |
| Guard ring structure | Integrated edge termination that suppresses premature avalanche breakdown at high dv/dt, improving reliability in noisy 24V systems |
| Low VF (0.55V @ 12A) | Reduces power dissipation by >40% vs. comparable 30V silicon rectifiers, lowering thermal design burden in sealed enclosures |
| 320A IFSM | Supports robust start-up behavior in DC-DC modules subjected to capacitor charging surges or short-circuit recovery |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive - meets environmental compliance for global OEM supply chains |
Applications
| Automotive DC-DC Converters | Industrial SMPS Secondary Rectification |
|---|---|
Use Scenario: Step-down conversion from 24V battery to 5V/3.3V rails in infotainment head units and gateway ECUs. IC Role / Device Role / Timing Role: Primary unidirectional power switch in synchronous or asynchronous buck-derived topologies; handles continuous 12A output current. Use Value: Low VF minimizes heat generation in confined spaces; AEC-Q101 qualification ensures long-term reliability under thermal cycling and vibration. | Use Scenario: Output rectification in 48V-to-12V telecom and factory automation PSUs. IC Role / Device Role / Timing Role: High-current freewheeling path during MOSFET off-time in active-clamp forward or LLC resonant converters. Use Value: 320A surge rating absorbs energy from leakage inductance spikes; DO-201AD axial leads simplify through-hole mounting on high-current PCB traces. |
| USB-C PD Adapters | Server Power Supply OR-ing |
Use Scenario: Secondary-side rectification in compact 65W–100W USB-C power adapters with GaN primary switches. IC Role / Device Role / Timing Role: Fast-recovery rectifier replacing slower silicon diodes to reduce switching losses and improve efficiency above 90%. Use Value: 0.55V VF at 12A cuts conduction loss by ~1.5W vs. legacy solutions, enabling smaller heatsinks and higher power density. | Use Scenario: Redundant 12V input OR-ing in dual-power-supply server backplanes. IC Role / Device Role / Timing Role: Discrete OR-ing diode providing fault isolation and current steering between parallel supplies. Use Value: Guard ring prevents catastrophic failure during hot-swap transients; RθJL = 3°C/W allows direct thermal coupling to chassis ground for stable thermal management. |
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-12BQ030-M3/45 | Same 30V VRRM, 12A IF, but TO-277 surface-mount package; slightly higher VF (0.57V typ @ 12A) | Requires SMT reflow process and PCB pad redesign; unsuitable for through-hole legacy production | Select when board space is constrained and automated assembly supports DPAK footprint |
| ON Semiconductor SB1230 | 30V VRRM, 12A IF, DO-201AD package, but not AEC-Q101 qualified; VF = 0.58V max @ 12A | Lacks automotive stress validation; limited to industrial/commercial temperature range (-65°C to +150°C) | Select for cost-sensitive non-automotive applications where qualification overhead is unnecessary |
Compared with VS-12BQ030-M3/45 and SB1230, SR1203HR0G uniquely combines AEC-Q101 qualification, DO-201AD through-hole compatibility, and lowest VF among 30V/12A Schottkys - making it optimal for automotive and high-reliability industrial rectification where leaded assembly and thermal robustness are prioritized.
Availability
SR1203HR0G is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial SMPS secondary rectification, and USB-C PD adapter designs requiring stable component supply, long-lifecycle assurance, and AEC-Q101-compliant sourcing.
Supply support for SR1203HR0G 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 diodes, and MOSFETs for automotive and industrial markets.
The SR1202–SR1204 family was designed specifically for high-current, high-reliability rectification in 12V–48V automotive and industrial power systems - emphasizing AEC-Q101 qualification, low VF, and rugged thermal performance in leaded packages.
FAQ
What does the "H" and "R0G" suffix mean in SR1203HR0G?
The "H" denotes AEC-Q101 qualification per the ordering code table in the SR1202–SR1204 datasheet. "R0G" indicates green molding compound (halogen-free) and tape-and-reel packaging (1,250 units per reel). SR1203HR0G is therefore the AEC-Q101-qualified, halogen-free, tape-and-reel variant of the 30V member of the SR1202–SR1204 Schottky rectifier series.
Is SR1203HR0G pin-compatible with SR1202HR0G or SR1204HR0G?
Yes - all SR1202/SR1203/SR1204 variants share identical DO-201AD package dimensions, lead spacing, and pinout (anode/cathode). The only difference is VRRM: 20V, 30V, and 40V respectively. SR1203HR0G can be substituted in designs targeting 30V blocking, provided layout accommodates its specific voltage margin and thermal profile.
What is the maximum allowable junction temperature for SR1203HR0G during continuous operation?
The absolute maximum junction temperature for SR1203HR0G is 150°C in DC forward mode, as specified in the Absolute Maximum Ratings table. Derating is required above 75°C ambient; the forward current must be reduced linearly to zero at 150°C junction temperature, per the Forward Current Derating Curve in the datasheet.
Does SR1203HR0G require a heatsink in a 12A continuous application?
Not necessarily - with RθJL = 3°C/W and proper PCB copper area (≥ 250 mm² per lead), SR1203HR0G can dissipate ~6.6W (12A × 0.55V) while maintaining TJ < 125°C at 75°C ambient. However, a small external heatsink or thermal via array is recommended for sustained 12A operation in enclosed or high-ambient environments.
How is polarity indicated on SR1203HR0G?
Polarity is marked by a cathode band on the DO-201AD body - the banded end is the cathode terminal. This matches standard diode marking convention and ensures correct orientation during manual or automated placement. The anode is the unmarked lead.
SR1203HR0G 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):
- 30 V
- Current - Average Rectified (Io):
- 12A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 12 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 30 V
- Capacitance @ Vr, F:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -50°C ~ 150°C
SR1203HR0G FAQ
1.How can I place an order for SR1203HR0G through Aetrix?
Please submit a Request for Quotation (RFQ) for SR1203HR0G 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 SR1203HR0G reliable?
The price and inventory of SR1203HR0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR1203HR0G is usually 5 days.
3.What payment methods are accepted for SR1203HR0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR1203HR0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SR1203HR0G?
SR1203HR0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SR1203HR0G 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 SR1203HR0G?
For technical support, including SR1203HR0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR1203HR0G requirements.
6.How does Aetrix verify that SR1203HR0G is sourced from the original manufacturer or authorized distributors?
All SR1203HR0G 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 SR1203HR0G meets industry standards.
7.What is the process for return or replacement of SR1203HR0G?
All SR1203HR0G units undergo pre-shipment inspection (PSI). If there is an issue with SR1203HR0G, 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 SR1203HR0G part is unused and in its original packaging.
Return procedure for SR1203HR0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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