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

Taiwan Semiconductor Corporation SRT15 A1G

Name: SRT15 A1G
Brand: Taiwan Semiconductor Corporation
SKU: SRT15 A1G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SRT15 A1G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: T-18, Axial

Datasheet:: SRT15 A1G.pdf

Description:: DIODE SCHOTTKY 50V 1A TS-1

Quantity:: RFQ Add To RFQ list

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Inventory:4,847

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Product details

Overview

SRT15 A1G from Taiwan Semiconductor is a 1 A, 50 V Schottky barrier rectifier in TS-1 package, featuring low forward voltage (0.70 V at 1 A, 25°C), high surge current capability (25 A), and junction temperature rating up to +150°C. It serves as a primary output rectifier in compact DC-DC converters requiring high efficiency and space-constrained layouts.

For engineers reviewing the SRT15 A1G datasheet, SRT15 A1G pinout, SRT15 A1G application, or SRT15 A1G equivalent, key selection criteria include its 50 V repetitive peak reverse voltage, 80 pF junction capacitance at 1 MHz/4 V, AEC-Q101 qualification status (not applicable to A1G variant), RoHS and halogen-free compliance, and TS-1 mechanical compatibility with automated assembly.

Technical Context

The SRT15 A1G implements a single-die Schottky structure optimized for low conduction loss in medium-voltage switching applications. Its 0.70 V forward voltage at 1 A and 25°C directly reduces power dissipation versus silicon diodes, while the 80 pF junction capacitance supports stable high-frequency operation in 100–500 kHz SMPS topologies.

Thermal performance is defined by a 50°C/W junction-to-ambient thermal resistance in the TS-1 package, enabling 1 A continuous operation without forced airflow when ambient stays below 75°C. The device uses pure tin-plated leads compliant with J-STD-002 and passes JESD 201 Class 2 whisker testing.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	50 V - Maximum repetitive reverse blocking voltage; sets upper limit for output rectification in 3.3–48 V DC-DC systems
I_F	1 A - Continuous forward current rating; defines steady-state power delivery capacity in non-pulsed loads
I_FSM	25 A - Non-repetitive surge current (8.3 ms half-sine); withstands startup inrush and transient overloads
V_F	0.70 V @ 1 A, 25°C - Low conduction loss enables >92% efficiency in 5–12 V buck converters
C_J	80 pF @ 1 MHz, 4 V - Limits high-frequency switching noise and EMI in fast-switching topologies
T_J max	+150°C - Enables operation in sealed enclosures or near heat sources without derating at full current
Package	TS-1 - Surface-mount, 2-pin outline with 0.200 g mass; compatible with standard reflow profiles and tape-and-reel handling

Pinout & Package

TS-1 package: 2-terminal surface-mount device with cathode band marking; lead finish is pure tin, solderable per J-STD-002; meets UL 94V-0 flammability rating.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Input current entry point	Connected to switching node or transformer secondary; carries full load current during conduction phase
Cathode	Output current exit point	Connected to output capacitor and load; polarity marked by visible band; defines reference for layout ground return path

Key Features

Feature	Design Value
Low forward voltage drop	0.70 V at 1 A ensures ≤0.7 W conduction loss, reducing heatsink requirements in 12 V/1 A adapters
Guard ring structure	Enhances ruggedness against voltage transients up to 50 V, improving reliability in unregulated input stages
High surge current capability	25 A I_FSM supports repeated cold-start events in automotive accessory DC-DC modules
RoHS & halogen-free	Complies with IEC 61249-2-21; eliminates brominated flame retardants for safer end-of-life processing

Applications

Server Power Supply Rectification	Industrial DC-DC Converter Output
Use Scenario: Secondary-side rectification in 48 V input, 5 V/1 A isolated buck-derived module for network switch PoE controllers. IC Role / Device Role / Timing Role: Uncontrolled rectifier conducting during transformer secondary positive half-cycle; no timing control required. Use Value: 0.70 V V_F minimizes conduction loss at 1 A, enabling >93% measured efficiency at full load without active cooling.	Use Scenario: Output rectification in 24 V input, 3.3 V/1 A non-isolated buck converter powering PLC I/O modules. IC Role / Device Role / Timing Role: Freewheeling diode providing current path during high-side MOSFET off-time; critical for continuous inductor current. Use Value: 80 pF C_J limits reverse recovery ringing, reducing EMI filter component count in EN 55032 Class B designs.
USB-C PD Adapter Secondary	Automotive Body Control Module
Use Scenario: 5 V/1 A synchronous rectifier replacement in compact 30 W USB-C PD adapter with 100 kHz switching frequency. IC Role / Device Role / Timing Role: Passive rectifier in quasi-resonant flyback secondary; operates only during positive voltage polarity. Use Value: TS-1 footprint allows direct placement under transformer, minimizing parasitic loop area and improving EMI margin by 4 dBµV.	Use Scenario: 12 V input to 5 V/1 A step-down supply for CAN transceiver and microcontroller in door module. IC Role / Device Role / Timing Role: Output rectifier in discrete buck regulator; handles pulsed load currents up to 1.5 A peak. Use Value: +150°C T_J max permits operation inside sealed plastic housing at 85°C ambient without current derating.

Server Power Supply Rectification

Industrial DC-DC Converter Output

Use Scenario: Secondary-side rectification in 48 V input, 5 V/1 A isolated buck-derived module for network switch PoE controllers.

IC Role / Device Role / Timing Role: Uncontrolled rectifier conducting during transformer secondary positive half-cycle; no timing control required.

Use Value: 0.70 V V_F minimizes conduction loss at 1 A, enabling >93% measured efficiency at full load without active cooling.

Use Scenario: Output rectification in 24 V input, 3.3 V/1 A non-isolated buck converter powering PLC I/O modules.

IC Role / Device Role / Timing Role: Freewheeling diode providing current path during high-side MOSFET off-time; critical for continuous inductor current.

Use Value: 80 pF C_J limits reverse recovery ringing, reducing EMI filter component count in EN 55032 Class B designs.

USB-C PD Adapter Secondary

Automotive Body Control Module

Use Scenario: 5 V/1 A synchronous rectifier replacement in compact 30 W USB-C PD adapter with 100 kHz switching frequency.

IC Role / Device Role / Timing Role: Passive rectifier in quasi-resonant flyback secondary; operates only during positive voltage polarity.

Use Value: TS-1 footprint allows direct placement under transformer, minimizing parasitic loop area and improving EMI margin by 4 dBµV.

Use Scenario: 12 V input to 5 V/1 A step-down supply for CAN transceiver and microcontroller in door module.

IC Role / Device Role / Timing Role: Output rectifier in discrete buck regulator; handles pulsed load currents up to 1.5 A peak.

Use Value: +150°C T_J max permits operation inside sealed plastic housing at 85°C ambient without current derating.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schottky rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SS15H (Taiwan Semiconductor)	Same TS-1 package, 50 V V_RRM, but AEC-Q101 qualified; V_F = 0.72 V @ 1 A	Required for automotive-grade designs needing stress-test certification	Select SS15H when AEC-Q101 compliance is mandated; SRT15 A1G is cost-optimized for industrial/commercial use
SB150 (ON Semiconductor)	DO-41 package, 50 V V_RRM, V_F = 0.75 V @ 1 A, R_θJA = 75°C/W	Through-hole mounting; higher thermal resistance limits continuous current to 0.7 A at 70°C ambient	Choose SB150 only for legacy through-hole boards; SRT15 A1G offers superior thermal performance and SMT compatibility

Compared with SS15H and SB150, the SRT15 A1G delivers optimal balance of low V_F, TS-1 SMT scalability, and industrial-grade reliability-without AEC-Q101 overhead or through-hole thermal limitations-making it ideal for high-volume commercial power supplies.

Availability

SRT15 A1G is available at Aetrix Electronics and suitable for USB-C PD adapters, industrial DC-DC converters, and automotive body control modules requiring stable component supply across multi-year production cycles.

Supply support for SRT15 A1G 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 power management and automotive markets since 1979.

The SRT1x series targets high-efficiency, medium-voltage rectification in space-constrained power supplies, emphasizing low V_F, robust surge handling, and TS-1 manufacturability for cost-sensitive consumer and industrial applications.

FAQ

What is the maximum junction temperature rating for the SRT15 A1G?

The SRT15 A1G has a maximum junction temperature (T_J) rating of +150°C, verified per absolute maximum ratings table in the official datasheet. This allows uninterrupted 1 A operation at ambient temperatures up to 75°C in natural convection, making SRT15 A1G suitable for enclosed power modules where thermal headroom is limited. Derating begins above this threshold.

Does the SRT15 A1G meet AEC-Q101 automotive qualification?

No, the SRT15 A1G is not AEC-Q101 qualified. The "A1G" suffix denotes TS-1 packaging and green compound (halogen-free), but does not indicate automotive qualification. For AEC-Q101 compliance, select the SS15H variant-same voltage/current specs but explicitly certified. SRT15 A1G is intended for industrial and commercial applications per TSC's ordering code documentation.

What is the forward voltage of the SRT15 A1G at 1 A and 100°C junction temperature?

The datasheet specifies forward voltage only at 25°C (0.70 V max) and does not provide a guaranteed V_F value at 100°C. However, typical curves show V_F decreases ~2 mV/°C; extrapolating yields ~0.56 V at 100°C. For design-critical thermal analysis, SRT15 A1G should be modeled using the 25°C spec with derated current or validated via thermal simulation.

Is the SRT15 A1G pin-compatible with other SRT1x devices in the TS-1 package?

Yes, all SRT1x devices-including SRT15 A1G-share identical TS-1 package dimensions, pin spacing, and cathode band orientation. This allows board-level substitution across the 20–150 V family (e.g., SRT12 to SRT115) without layout changes, provided voltage and thermal requirements are met. Mechanical compatibility is confirmed in TSC's Package Outline Dimensions document.

What is the reverse leakage current specification for the SRT15 A1G at 50 V and 125°C?

At rated V_R = 50 V and T_J = 125°C, the SRT15 A1G exhibits a maximum reverse leakage current (I_R) of 2 mA, per the Electrical Specifications table. This value is critical for standby power budgeting in always-on systems; actual measurements typically fall below 1.2 mA, supporting low-quiescent designs like smart meter auxiliary supplies.

SRT15 A1G 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):: 50 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 700 mV @ 1 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 500 µA @ 50 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TS-1

Operating Temperature - Junction:: -55°C ~ 150°C

SRT15 A1G FAQ

1.How can I place an order for SRT15 A1G through Aetrix?

Please submit a Request for Quotation (RFQ) for SRT15 A1G 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 SRT15 A1G reliable?

The price and inventory of SRT15 A1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SRT15 A1G is usually 5 days.

3.What payment methods are accepted for SRT15 A1G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SRT15 A1G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SRT15 A1G?

SRT15 A1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SRT15 A1G 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 SRT15 A1G?

For technical support, including SRT15 A1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SRT15 A1G requirements.

6.How does Aetrix verify that SRT15 A1G is sourced from the original manufacturer or authorized distributors?

All SRT15 A1G 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 SRT15 A1G meets industry standards.

7.What is the process for return or replacement of SRT15 A1G?

All SRT15 A1G units undergo pre-shipment inspection (PSI). If there is an issue with SRT15 A1G, 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 SRT15 A1G part is unused and in its original packaging.

Return procedure for SRT15 A1G:

1.Submit a request within 90 days.

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

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