My Inquiry
My Account
Taiwan Semiconductor Corporation SR1203 R0G
- Part No.:
- SR1203 R0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
SR1203 R0G.pdf
- Description:
- DIODE SCHOTTKY 30V 12A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:3,817
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SR1203 R0G 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 - used in automotive-grade DC-DC converters and industrial SMPS.
For engineers reviewing the SR1203 R0G datasheet, SR1203 R0G pinout, SR1203 R0G application, or SR1203 R0G equivalent, key selection factors include its 30V VRRM, 150°C junction rating, DO-201AD thermal resistance (RθJL = 3°C/W), and AEC-Q101 qualification status for under-hood power conversion.
Technical Context
This Schottky rectifier uses a single-die construction with pure tin-plated leads and UL 94V-0 molding compound. Its guard ring structure enhances ruggedness against transient overvoltage events while maintaining low conduction loss across wide temperature range (–55°C to +150°C).
Designed for high-reliability 12A continuous operation, it delivers stable performance under repetitive surge conditions (320A @ 8.3ms) and supports high-frequency switching topologies due to low junction capacitance and fast recovery characteristics inherent to Schottky architecture.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 30 V - maximum reverse blocking voltage before breakdown; defines usable input voltage headroom in 24V automotive systems |
| IF | 12 A - continuous DC forward current rating at TA = 75°C; determines heatsink sizing in high-power adapters |
| VF max | 0.55 V @ 12A/25°C - directly sets conduction loss (6.6W at full load); enables >92% efficiency in 12V-output converters |
| IFSM | 320 A @ 8.3ms - peak non-repetitive surge rating; withstands inrush and fault currents without failure |
| RθJL | 3 °C/W - junction-to-lead thermal resistance; enables direct PCB copper pour cooling without external heatsink in many layouts |
| TJ max | +150 °C - maximum operating junction temperature; supports under-hood deployment in automotive power modules |
Pinout & Package
DO-201AD axial-leaded package with cathode band marking; lead finish: pure tin per J-STD-002; weight ≈1.10 g; UL 94V-0 compliant molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to lower-potential node (e.g., switch node in buck converter); requires adequate copper area for thermal dissipation |
| Cathode | Current exit point during forward conduction; marked by band | Connected to output rail or ground return; polarity must be verified to prevent reverse-bias damage in layout |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics requiring stress-tested reliability |
| Guard ring structure | Improves edge termination robustness against voltage transients and surface leakage in humid or contaminated environments |
| Low VF / high IF ratio | Enables compact thermal design in space-constrained 12A power supplies without forced air cooling |
| JESD 201 Class 2 whisker resistance | Ensures long-term solder joint integrity in high-vibration automotive and industrial deployments |
Applications
| Automotive DC-DC Converters | Industrial SMPS |
|---|---|
Use Scenario: Step-down conversion from 24V battery to 5V/3.3V rails in ADAS camera modules. IC Role / Device Role / Timing Role: Primary output rectifier in synchronous buck topology, handling continuous 12A load with minimal voltage drop. Use Value: 0.55V VF reduces conduction loss by ~1.8W vs. comparable 0.7V diodes, lowering thermal stress on PCB. | Use Scenario: Output stage of 48V-to-12V telecom power supply operating at 200kHz switching frequency. IC Role / Device Role / Timing Role: High-efficiency freewheeling path during low-side switch off-time; critical for EMI and efficiency compliance. Use Value: Low junction capacitance and fast recovery minimize reverse recovery ringing, easing EMI filter design. |
| Laptop Adapters | Server PSU Secondary Side |
Use Scenario: 19V output rectification in compact 90W AC-DC adapter with passive cooling. IC Role / Device Role / Timing Role: Main secondary-side rectifier replacing synchronous MOSFETs where cost and simplicity are prioritized. Use Value: DO-201AD package allows through-hole mounting with high thermal mass; RθJL = 3°C/W enables direct copper pour attachment. | Use Scenario: 12V output rectification in redundant 1+1 server power supply units with strict MTBF requirements. IC Role / Device Role / Timing Role: High-reliability output diode subjected to frequent hot-swap and load-step stress. Use Value: AEC-Q101 qualification and 320A surge rating provide margin against bus faults and inrush events. |
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-12EWH03-M3 | Same 30V VRRM, 12A IF, but TO-277 surface-mount package; slightly higher VF (0.57V) | Requires rework of PCB layout for SMT assembly; better suited for automated high-volume production | Select when board space is constrained and SMT process is established |
| ON Semiconductor MBR1230CT | Dual common-cathode configuration in TO-220AC; 30V rating per diode; higher thermal mass but larger footprint | Used where dual-output or redundancy is needed; not a direct replacement due to pinout and package mismatch | Select when dual-diode functionality or higher heatsinking is required |
Compared with VS-12EWH03-M3 and MBR1230CT, the SR1203 R0G offers AEC-Q101 qualification and axial DO-201AD packaging ideal for through-hole prototyping, repair, and automotive replacement - balancing ruggedness, thermal performance, and mechanical compatibility without requiring layout changes.
Availability
SR1203 R0G is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial SMPS, and laptop adapters requiring stable component supply with long lifecycle support.
Supply support for SR1203 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 SR1203 R0G belongs to TSC's AEC-Q101-qualified Schottky rectifier family, engineered specifically for high-current, high-reliability power conversion in harsh-environment applications including engine compartments and factory automation systems.
FAQ
What is the peak repetitive reverse voltage rating for SR1203 R0G?
The SR1203 R0G has a peak repetitive reverse voltage (VRRM) rating of 30 V. This value is fixed for the SR1203 variant and distinguishes it from SR1202 (20 V) and SR1204 (40 V). It defines the maximum DC or sinusoidal AC reverse voltage the device can block continuously without breakdown under normal operating conditions.
Is SR1203 R0G qualified for automotive applications?
Yes, SR1203 R0G is AEC-Q101 qualified. The "R0G" suffix indicates green-compliant, RoHS-compliant packaging with AEC-Q101 stress testing performed. This makes SR1203 R0G suitable for automotive power modules, body control units, and infotainment systems where reliability under temperature cycling, humidity, and vibration is mandatory.
What does the "R0G" suffix mean in SR1203 R0G?
The "R0G" suffix in SR1203 R0G denotes RoHS-compliant, halogen-free construction per IEC 61249-2-21, with green molding compound (UL 94V-0 rated) and pure tin-plated leads. It also signifies AEC-Q101 qualification - confirmed in the ordering information table where "H" or "R0G" codes indicate automotive-grade variants.
What is the maximum forward voltage drop of SR1203 R0G at full rated current?
The SR1203 R0G exhibits a maximum forward voltage drop (VF) of 0.55 V at 12 A and 25°C junction temperature. At elevated temperatures (e.g., 100°C), VF decreases slightly due to Schottky physics, but the datasheet specifies 0.55 V as the upper limit under nominal test conditions - critical for conduction loss calculation.
Can SR1203 R0G replace SR1202 or SR1204 in an existing design?
No - SR1203 R0G is not a drop-in replacement for SR1202 or SR1204 due to differing VRRM ratings (30 V vs. 20 V or 40 V). Substituting without circuit review risks overvoltage failure (with SR1202) or unnecessary derating (with SR1204). Always verify reverse voltage margin and thermal performance when changing within the SR120x family.
SR1203 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):
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -50°C ~ 150°C
SR1203 R0G FAQ
1.How can I place an order for SR1203 R0G through Aetrix?
Please submit a Request for Quotation (RFQ) for SR1203 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 SR1203 R0G reliable?
The price and inventory of SR1203 R0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR1203 R0G is usually 5 days.
3.What payment methods are accepted for SR1203 R0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR1203 R0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SR1203 R0G?
SR1203 R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SR1203 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 SR1203 R0G?
For technical support, including SR1203 R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR1203 R0G requirements.
6.How does Aetrix verify that SR1203 R0G is sourced from the original manufacturer or authorized distributors?
All SR1203 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 SR1203 R0G meets industry standards.
7.What is the process for return or replacement of SR1203 R0G?
All SR1203 R0G units undergo pre-shipment inspection (PSI). If there is an issue with SR1203 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 SR1203 R0G part is unused and in its original packaging.
Return procedure for SR1203 R0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SR1203 R0G Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
