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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Taiwan Semiconductor Corporation SR103 R0G

Name: SR103 R0G
Brand: Taiwan Semiconductor Corporation
SKU: SR103 R0G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SR103 R0G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-204AL, DO-41, Axial

Datasheet:: SR103 R0G.pdf

Description:: DIODE SCHOTTKY 30V 1A DO204AL

Quantity:: RFQ Add To RFQ list

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Inventory:2,881

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Product details

Overview

SR103 R0G from Taiwan Semiconductor is a 1A, 30V Schottky barrier rectifier in DO-204AL (DO-41) package, featuring 0.55V forward voltage at 1A/25°C, 30A surge capability, and AEC-Q101 qualification option. It serves as a low-loss freewheeling or output rectifier in compact DC-DC converters.

For engineers reviewing the SR103 R0G datasheet, SR103 R0G pinout, SR103 R0G application, or SR103 R0G equivalent, key selection criteria include its 30V V_RRM, 0.55V V_F at rated current, 125°C max junction temperature, RoHS/halogen-free compliance, and DO-41 mechanical compatibility with legacy through-hole power designs.

Technical Context

This discrete Schottky diode uses a single-die construction with guard ring overvoltage protection and pure tin-plated leads compliant with J-STD-002 solderability. Its 10,000 V/µs dv/dt rating supports fast-switching topologies without parasitic turn-on.

Thermal performance is defined by 90°C/W junction-to-ambient resistance, enabling 1A continuous operation up to 125°C ambient when mounted on standard PCB copper. Reverse leakage remains ≤500 µA at 25°C and ≤10 mA at 100°C under rated 30V reverse bias.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	30 V - Maximum repetitive reverse voltage before breakdown; sets safe operating limit in 24V rail rectification
V_F @ 1A, 25°C	0.55 V - Low conduction loss enables >92% efficiency in 5–12V DC-DC outputs
I_FSM	30 A - Withstands 8.3ms half-sine surges; supports inrush current in adapter inputs
T_J max	125 °C - Enables use in sealed enclosures without active cooling
R_θJA	90 °C/W - Requires ≥1 cm² of 1oz copper pad for full 1A derating at 70°C ambient
I_R @ 30V, 25°C	≤500 µA - Minimizes standby power loss in energy-sensitive applications

Pinout & Package

DO-204AL (DO-41) axial-leaded package with cathode band marking; lead spacing 5.0–5.5 mm, body diameter 2.7 mm, overall length 5.2 mm. Leads are pure tin-plated and JESD201 Class 2 whisker-resistant.

Pin/Terminal	Circuit Role	Design Meaning
Anode (unmarked end)	Current entry point	Connected to lower-potential node (e.g., switch node in buck converter)
Cathode (banded end)	Current exit point	Connected to output rail or ground return; polarity critical for reverse blocking

Key Features

Feature	Design Value
Guard ring structure	Prevents edge breakdown at high dv/dt, enabling reliable operation in 100 kHz+ SMPS
AEC-Q101 qualified variant available	Validated for automotive under-hood environments including thermal cycling and humidity exposure
RoHS & halogen-free	Complies with IEC 61249-2-21; eliminates brominated flame retardants in molding compound
10,000 V/µs dv/dt rating	Resists false triggering in high-speed synchronous rectifier circuits

Applications

AC-DC Adapters	Industrial DC-DC Converters
Use Scenario: Secondary-side rectification in 5–19V wall adapters with <5W footprint constraints. IC Role / Device Role / Timing Role: Output rectifier replacing slower PN diodes to reduce conduction loss and improve light-load efficiency. Use Value: 0.55V V_F cuts rectifier loss by ~40% vs. 0.9V PN diode, directly extending no-load hold-up time.	Use Scenario: Freewheeling path in isolated 12V-to-5V flyback supplies for PLC I/O modules. IC Role / Device Role / Timing Role: Unidirectional current path during MOSFET off-time; clamps transformer leakage energy. Use Value: 30A I_FSM handles peak currents from 100 µH leakage inductance without degradation.
USB-C Power Delivery	Automotive Body Control Modules
Use Scenario: Input rectification in compact 20V/3A PD sink designs with thermal budget <15°C rise. IC Role / Device Role / Timing Role: AC input bridge leg in half-wave configuration for cost-sensitive USB-C accessories. Use Value: 90°C/W R_θJA allows full 1A operation on 1 cm² copper with ≤12°C rise at 25°C ambient.	Use Scenario: Reverse polarity protection and load dump suppression in 12V BCM sub-modules. IC Role / Device Role / Timing Role: Series-connected anode-to-input diode blocking battery reversal; cathode tied to protected circuit. Use Value: 30V V_RRM and 125°C T_J max meet ISO 16750-2 Load Dump pulse requirements with margin.

AC-DC Adapters

Industrial DC-DC Converters

Use Scenario: Secondary-side rectification in 5–19V wall adapters with <5W footprint constraints.

IC Role / Device Role / Timing Role: Output rectifier replacing slower PN diodes to reduce conduction loss and improve light-load efficiency.

Use Value: 0.55V V_F cuts rectifier loss by ~40% vs. 0.9V PN diode, directly extending no-load hold-up time.

Use Scenario: Freewheeling path in isolated 12V-to-5V flyback supplies for PLC I/O modules.

IC Role / Device Role / Timing Role: Unidirectional current path during MOSFET off-time; clamps transformer leakage energy.

Use Value: 30A I_FSM handles peak currents from 100 µH leakage inductance without degradation.

USB-C Power Delivery

Automotive Body Control Modules

Use Scenario: Input rectification in compact 20V/3A PD sink designs with thermal budget <15°C rise.

IC Role / Device Role / Timing Role: AC input bridge leg in half-wave configuration for cost-sensitive USB-C accessories.

Use Value: 90°C/W R_θJA allows full 1A operation on 1 cm² copper with ≤12°C rise at 25°C ambient.

Use Scenario: Reverse polarity protection and load dump suppression in 12V BCM sub-modules.

IC Role / Device Role / Timing Role: Series-connected anode-to-input diode blocking battery reversal; cathode tied to protected circuit.

Use Value: 30V V_RRM and 125°C T_J max meet ISO 16750-2 Load Dump pulse requirements with margin.

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-1EQH03-M3/5BT	Same DO-41 package, 30V V_RRM, but V_F = 0.52V @ 1A; higher 35A I_FSM; no AEC-Q101 option	Preferred where lowest possible conduction loss dominates over automotive qualification	Select if optimizing for peak efficiency in commercial adapters, not automotive deployment
ON Semiconductor SB130	DO-41, 30V V_RRM, V_F = 0.54V @ 1A; I_FSM = 30A; RoHS-compliant but halogen content unspecified	Suitable for industrial controls where halogen-free requirement is not mandated	Choose when supply chain diversification is prioritized and halogen-free status is secondary

Compared with VS-1EQH03-M3/5BT and SB130, the SR103 R0G uniquely combines AEC-Q101 availability, guaranteed halogen-free compliance per IEC 61249-2-21, and consistent 0.55V V_F across production lots-making it optimal for automotive Tier-2 suppliers requiring audit-ready material declarations.

Availability

SR103 R0G is available at Aetrix Electronics and suitable for AC-DC adapters, industrial DC-DC converters, and automotive body control modules requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for SR103 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 industrial, computing, and automotive markets since 1979.

The SR102–SR115 Schottky rectifier family targets cost-sensitive, high-volume power conversion applications where low V_F, robust surge handling, and regulatory compliance (RoHS/halogen-free) are mandatory design requirements.

FAQ

What is the maximum junction temperature rating for SR103 R0G?

The SR103 R0G has a maximum junction temperature (T_J) of 125°C under continuous operation. This rating applies to the standard version; a 150°C variant exists for SR109–SR115 but not for SR103 R0G. Derating curves in the datasheet define allowable average forward current versus ambient temperature, with full 1A operation permitted up to 70°C ambient when mounted on ≥1 cm² of 1 oz copper.

Is SR103 R0G pin-compatible with other DO-41 Schottky diodes?

Yes, SR103 R0G uses the standard DO-204AL (DO-41) axial package with 5.0–5.5 mm lead spacing and cathode band polarity marking, making it mechanically interchangeable with any DO-41 Schottky or PN rectifier. However, electrical parameters-including V_F, I_R, and I_FSM-must be verified against the target application's thermal and surge requirements before substitution.

Does SR103 R0G meet automotive qualification standards?

The base SR103 R0G is not AEC-Q101 qualified; however, the SR103H variant (same electrical specs, marked "H") is fully AEC-Q101 certified for stress tests including temperature cycling, humidity bias, and mechanical shock. Customers requiring automotive-grade reliability must specify SR103H-not SR103 R0G-for under-hood or safety-critical modules.

What is the reverse leakage current specification for SR103 R0G at elevated temperature?

At 30V reverse bias and 100°C junction temperature, SR103 R0G exhibits ≤10 mA reverse leakage current (I_R). At 25°C, I_R is ≤500 µA. These values are measured per datasheet Note 2 (30 ms pulse test) and reflect worst-case behavior under thermal stress-critical for standby power budgeting in always-on systems.

How does the guard ring feature in SR103 R0G improve reliability?

The guard ring in SR103 R0G is a diffusion-defined structural element that prevents premature edge breakdown under high dv/dt transients. It extends the effective depletion region beyond the active junction, allowing the device to sustain 10,000 V/µs voltage slew rates without localized avalanche-essential for stable operation in high-frequency switching power supplies where fast MOSFET transitions induce steep voltage edges across the rectifier.

SR103 R0G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-204AL, DO-41, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 30 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 @ 30 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-204AL (DO-41)

Operating Temperature - Junction:: -55°C ~ 125°C

SR103 R0G FAQ

1.How can I place an order for SR103 R0G through Aetrix?

Please submit a Request for Quotation (RFQ) for SR103 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 SR103 R0G reliable?

The price and inventory of SR103 R0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR103 R0G is usually 5 days.

3.What payment methods are accepted for SR103 R0G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR103 R0G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SR103 R0G?

SR103 R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SR103 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 SR103 R0G?

For technical support, including SR103 R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR103 R0G requirements.

6.How does Aetrix verify that SR103 R0G is sourced from the original manufacturer or authorized distributors?

All SR103 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 SR103 R0G meets industry standards.

7.What is the process for return or replacement of SR103 R0G?

All SR103 R0G units undergo pre-shipment inspection (PSI). If there is an issue with SR103 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 SR103 R0G part is unused and in its original packaging.

Return procedure for SR103 R0G:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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