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Taiwan Semiconductor Corporation SRT14
- Part No.:
- SRT14
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- T-18, Axial
- Datasheet:
-
SRT14.pdf
- Description:
- 1A, 40V, SCHOTTKY RECTIFIER
- Quantity:
- Payment:
- Shipping:
Inventory:8,417
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Product details
Overview
SRT14 from Taiwan Semiconductor is a 1 A, 40 V repetitive peak reverse voltage Schottky barrier rectifier in TS-1 package, featuring 0.55 V forward voltage at 1 A and 25 °C, 25 A surge current capability, and AEC-Q101 qualification option (SRT14H). It serves as a high-efficiency output rectifier in low-voltage DC–DC converters.
For engineers reviewing the SRT14 datasheet, SRT14 pinout, SRT14 application, or SRT14 equivalent, key selection criteria include its 40 V VRRM, low 0.55 V VF at rated current, 50 °C/W junction-to-ambient thermal resistance, 110 pF junction capacitance at 4 V, and cathode-band polarity marking for unambiguous PCB layout.
Technical Context
The SRT14 operates as a single-die, unidirectional Schottky rectifier with guard ring structure for overvoltage protection and pure tin-plated leads compliant with J-STD-002 solderability. Its thermal performance is defined by RθJA = 50 °C/W and maximum junction temperature of 125 °C (standard) or 150 °C (AEC-Q101 variant).
Electrical behavior is characterized by low forward conduction loss (VF ≤ 0.55 V @ 1 A, 25 °C), low reverse leakage (IR ≤ 500 µA @ 40 V, 25 °C), and fast switching enabled by 110 pF junction capacitance at 1 MHz and 4.0 V reverse bias - suitable for high-frequency SMPS operation up to several hundred kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse blocking voltage; defines safe operating range in 3.3 V–24 V output DC–DC stages |
| IF | 1 A continuous - Rated average forward current; supports compact designs without forced air cooling |
| VF | 0.55 V @ 1 A, 25 °C - Low conduction loss reduces power dissipation and improves efficiency in high-duty-cycle applications |
| IFSM | 25 A @ 8.3 ms - Withstands brief input surges or startup transients without failure |
| CJ | 110 pF @ 1 MHz, 4.0 V - Enables fast switching with minimal capacitive turn-off delay in high-frequency topologies |
| RθJA | 50 °C/W - Predictable thermal rise under natural convection; enables accurate board-level thermal modeling |
| TJ(max) | 125 °C (standard) - Sets maximum allowable junction temperature for reliability-limited lifetime calculations |
Pinout & Package
TS-1 package: surface-mount, single-anode/single-cathode configuration with cathode indicated by molded band; lead-free, RoHS-compliant, UL 94V-0 molding compound; 0.200 g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., switch node or ground return); requires adequate copper pour for thermal relief |
| Cathode | Forward current exit point | Marked by visible band; connects to positive output rail; polarity error prevents conduction and risks system fault |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Enhances ruggedness against transient overvoltage events without external snubbers in automotive load-dump conditions |
| AEC-Q101 qualified version available (SRT14H) | Validated for automotive under-hood environments including temperature cycling, humidity, and mechanical shock per AEC standard |
| Low 0.55 V forward voltage | Reduces conduction loss by ~30% vs. comparable 40 V silicon diodes, directly improving converter efficiency at light-to-moderate loads |
| Pure tin-plated leads | Ensures reliable solder joint formation per J-STD-002, eliminating whisker risk per JESD201 Class 2 |
| 110 pF junction capacitance | Minimizes reverse recovery charge (QRR) and associated switching losses in synchronous rectifier replacement scenarios |
Applications
| Switching Mode Power Supply (SMPS) | USB-C PD Adapters |
|---|---|
Use Scenario: Secondary-side rectification in 5 V–20 V isolated flyback or active-clamp forward converters. IC Role / Device Role / Timing Role: Unidirectional current steering element replacing slower silicon diodes to reduce conduction loss and improve efficiency. Use Value: Achieves >92% efficiency at 1 A output with 0.55 V VF, enabling smaller heatsinks and higher power density. | Use Scenario: Output rectification in compact 30 W–65 W USB-C power adapters with 5–20 V PPS profiles. IC Role / Device Role / Timing Role: High-frequency freewheeling path during MOSFET off-time in quasi-resonant topologies. Use Value: 110 pF CJ and 25 A IFSM support clean turn-off and robust surge handling during plug-in events. |
| Industrial DC–DC Converters | Automotive Body Control Modules |
Use Scenario: Point-of-load (POL) rectification in 12 V–24 V input industrial converters powering FPGAs or sensors. IC Role / Device Role / Timing Role: Low-loss output stage component in non-isolated buck-derived topologies. Use Value: 50 °C/W RθJA allows operation at full 1 A load with <40 °C rise on 1-in² 2-oz copper, simplifying thermal design. | Use Scenario: Reverse polarity protection and load dump clamping in 12 V battery-fed lighting or actuator drivers. IC Role / Device Role / Timing Role: Guard ring-enabled overvoltage clamp and main power path rectifier in AEC-Q101-compliant modules. Use Value: SRT14H variant meets automotive temperature (-40 °C to +150 °C) and reliability requirements without derating. |
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-1EQH04-M3/45 | 40 V VRRM, 1 A IF, 0.52 V VF @ 1 A, TS-1 package, but no AEC-Q101 option | Same footprint and electrical rating; lacks automotive qualification and guard ring | Select when AEC-Q101 compliance is not required and lowest possible VF is prioritized |
| ON Semiconductor SB140 | 40 V VRRM, 1 A IF, 0.54 V VF @ 1 A, DO-41 package (through-hole), no AEC-Q101 option | Requires PCB rework for through-hole mounting; higher RθJA (~70 °C/W) limits power density | Select only for legacy through-hole designs where surface-mount requalification is impractical |
Compared with VS-1EQH04-M3/45 and SB140, the SRT14 offers identical voltage/current ratings and competitive VF, while uniquely providing AEC-Q101 qualification and integrated guard ring - critical for automotive and high-reliability industrial deployments where transient immunity and qualification traceability are mandatory.
Availability
SRT14 is available at Aetrix Electronics and suitable for switching mode power supplies, USB-C PD adapters, and industrial DC–DC converters requiring stable component supply, consistent parametric performance, and long-term manufacturability.
Supply support for SRT14 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 devices, rectifiers, and protection components since 1979.
The SRT12–SRT115 series was designed specifically for high-efficiency, high-reliability rectification in space-constrained power conversion systems - emphasizing low VF, robust surge capability, and automotive-grade variants for next-generation power adapters and vehicle electronics.
FAQ
What is the maximum junction temperature for the SRT14?
The SRT14 has a maximum junction temperature of 125 °C under standard qualification. An AEC-Q101-qualified variant (SRT14H) extends this to 150 °C for automotive under-hood use. Thermal design must ensure that power dissipation - calculated from IF × VF and ambient conditions - does not exceed this limit across the full operating life of the SRT14.
Is the SRT14 pin-compatible with other parts in the SRT12–SRT115 family?
Yes, all SRT12–SRT115 devices share identical TS-1 package dimensions, anode/cathode terminal locations, and polarity marking - enabling drop-in voltage-rating upgrades (e.g., SRT14 → SRT15 for 50 V systems) without PCB changes. The SRT14 maintains the same 0.200 g weight and J-STD-002 solderability as the full family.
Does the SRT14 have AEC-Q101 qualification?
The base SRT14 is not AEC-Q101 qualified; however, the SRT14H variant is fully AEC-Q101 qualified and shares identical electrical specifications and TS-1 packaging. Designers requiring automotive compliance must specify SRT14H - the 'H' suffix denotes qualification per stress test conditions including temperature cycling, humidity, and mechanical shock.
What is the reverse leakage current of the SRT14 at elevated temperature?
At 100 °C junction temperature and rated 40 V reverse voltage, the SRT14 exhibits ≤10 mA reverse leakage current. This value increases with temperature but remains within specification limits up to 125 °C. At 25 °C and 40 V, leakage is ≤500 µA - critical for standby power budgeting in energy-efficient designs using the SRT14.
How does the guard ring in the SRT14 improve reliability?
The guard ring in the SRT14 provides edge termination that suppresses electric field crowding at the die periphery, preventing premature avalanche breakdown during transient overvoltage events such as load dump or inductive switching spikes. This structural feature enhances ruggedness without requiring external TVS components, directly improving system-level reliability of the SRT14 in harsh environments.
SRT14 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 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 @ 40 V
- Capacitance @ Vr, F:
- 110pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TS-1
- Operating Temperature - Junction:
- -55°C ~ 125°C
SRT14 FAQ
1.How can I place an order for SRT14 through Aetrix?
Please submit a Request for Quotation (RFQ) for SRT14 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 SRT14 reliable?
The price and inventory of SRT14 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SRT14 is usually 5 days.
3.What payment methods are accepted for SRT14?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SRT14 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SRT14?
SRT14 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SRT14 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 SRT14?
For technical support, including SRT14 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SRT14 requirements.
6.How does Aetrix verify that SRT14 is sourced from the original manufacturer or authorized distributors?
All SRT14 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 SRT14 meets industry standards.
7.What is the process for return or replacement of SRT14?
All SRT14 units undergo pre-shipment inspection (PSI). If there is an issue with SRT14, 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 SRT14 part is unused and in its original packaging.
Return procedure for SRT14:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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