Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Taiwan Semiconductor Corporation TST30U45C

Name: TST30U45C
Brand: Taiwan Semiconductor Corporation
SKU: TST30U45C
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: TST30U45C

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: TO-220-3

Datasheet:: TST30U45C.pdf

Description:: DIODE SCHOTTKY 45V 15A TO220AB

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,574

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

TST30U45C from Taiwan Semiconductor is a 30A, 45V low forward voltage (VF) trench Schottky rectifier in TO-220AB package, featuring dual-die construction, 0.45V typical VF at 15A/25°C, 250A IFSM surge rating, and 150°C maximum junction temperature - deployed in high-efficiency SMPS output stages.

For engineers reviewing the TST30U45C datasheet, TST30U45C pinout, TST30U45C application, or TST30U45C equivalent, key selection criteria include forward voltage at operating current/temperature, thermal resistance (R_θJC = 4°C/W), repetitive peak reverse voltage (45V), surge capability (250A @ 8.3ms), and RoHS/halogen-free compliance for industrial power designs.

Technical Context

This device implements patented trench Schottky technology to achieve lower VF and superior high-temperature stability versus planar Schottky diodes. Its dual-die configuration enables parallel conduction paths within a single TO-220AB package, supporting higher average current handling while maintaining low thermal resistance.

The TST30U45C operates with a rated V_RRM of 45V and exhibits 0.40V typical forward voltage at 15A and 125°C - critical for minimizing conduction loss in thermally constrained DC-DC converters and adapters where efficiency must be sustained across wide ambient ranges.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	45 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in flyback/freewheeling applications
I_F	30 A - Continuous average forward current at case temperature ≤ 75°C; sets baseline conduction capacity
I_FSM	250 A - Non-repetitive surge current (8.3ms half-sine); supports inrush and transient overload tolerance
V_F (typ)	0.45 V @ 15A, 25°C - Low conduction loss directly reduces power dissipation and improves system efficiency
R_θJC	4 °C/W - Junction-to-case thermal resistance; enables predictable heatsink sizing for thermal management
T_J(max)	150 °C - Maximum allowable junction temperature; permits operation in high-ambient industrial environments
I_R (max)	500 µA @ 25°C - Low leakage ensures minimal standby power loss in offline power supplies

Pinout & Package

Package: TO-220AB - Insulated case with matte tin-plated leads, UL 94V-0 molding compound, 0.56 N·m max mounting torque, JESD201 Class 2 whisker compliant, polarity marked on device body.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Tab)	Main current input terminal	Electrically connected to metal tab; requires insulated mounting when used as cathode-referenced device
Cathode (Lead 2)	Main current output terminal	Second lead (non-tab); standard cathode connection for freewheeling or output rectification
NC / Dummy Lead	No internal connection	Third lead present but unconnected; provides mechanical stability and alignment in TO-220AB footprint

Key Features

Feature	Design Value
Trench Schottky architecture	Enables 0.45V typical VF at 15A/25°C - 10–15% lower than comparable planar Schottkys, reducing conduction loss
High-temperature VF stability	0.40V typical VF maintained at 15A/125°C - sustains efficiency under thermal stress without derating
Dual-die configuration	Two parallel Schottky junctions in one TO-220AB package - improves current sharing and thermal distribution
RoHS + halogen-free	Complies with IEC 61249-2-21; eliminates brominated flame retardants for environmentally regulated end equipment

Applications

Laptop AC Adapter Secondary Rectification	Server PSU Output Stage
Use Scenario: High-density 65W–120W laptop adapter with synchronous rectification constraints and tight thermal envelope. IC Role / Device Role / Timing Role: Output freewheeling rectifier replacing MOSFET-based SR in cost-sensitive designs where gate drive complexity must be avoided. Use Value: 0.45V VF minimizes conduction loss at 15–25A load currents, enabling >92% efficiency without active control circuitry.	Use Scenario: 12V/30A output rail in redundant 2kW server power supply with forced-air cooling and strict reliability requirements. IC Role / Device Role / Timing Role: Primary secondary-side rectifier handling continuous 30A DC output with 250A surge margin for hot-swap events. Use Value: Dual-die structure and 4°C/W R_θJC allow stable operation at 125°C junction temperature under full load and airflow interruption.
Industrial DC-DC Converter Input Protection	Telecom Power Shelf OR-ing Diode
Use Scenario: 48V input, 12V output isolated DC-DC module for factory automation controllers with wide ambient range (-40°C to +85°C). IC Role / Device Role / Timing Role: Input reverse-polarity protection diode placed before primary-side EMI filter and PFC stage. Use Value: Low 500µA IR at 25°C and 60mA at 125°C prevents excessive standby drain while surviving cold-start surges.	Use Scenario: Redundant 48V power shelf with two parallel inputs requiring automatic current path selection and fault isolation. IC Role / Device Role / Timing Role: OR-ing diode in high-current backplane feed, conducting up to 30A continuously with minimal voltage drop. Use Value: 45V V_RRM provides sufficient margin over 48V nominal bus; 0.45V VF limits insertion loss to <1.5W per diode at full load.

Laptop AC Adapter Secondary Rectification

Server PSU Output Stage

Use Scenario: High-density 65W–120W laptop adapter with synchronous rectification constraints and tight thermal envelope.

IC Role / Device Role / Timing Role: Output freewheeling rectifier replacing MOSFET-based SR in cost-sensitive designs where gate drive complexity must be avoided.

Use Value: 0.45V VF minimizes conduction loss at 15–25A load currents, enabling >92% efficiency without active control circuitry.

Use Scenario: 12V/30A output rail in redundant 2kW server power supply with forced-air cooling and strict reliability requirements.

IC Role / Device Role / Timing Role: Primary secondary-side rectifier handling continuous 30A DC output with 250A surge margin for hot-swap events.

Use Value: Dual-die structure and 4°C/W R_θJC allow stable operation at 125°C junction temperature under full load and airflow interruption.

Industrial DC-DC Converter Input Protection

Telecom Power Shelf OR-ing Diode

Use Scenario: 48V input, 12V output isolated DC-DC module for factory automation controllers with wide ambient range (-40°C to +85°C).

IC Role / Device Role / Timing Role: Input reverse-polarity protection diode placed before primary-side EMI filter and PFC stage.

Use Value: Low 500µA IR at 25°C and 60mA at 125°C prevents excessive standby drain while surviving cold-start surges.

Use Scenario: Redundant 48V power shelf with two parallel inputs requiring automatic current path selection and fault isolation.

IC Role / Device Role / Timing Role: OR-ing diode in high-current backplane feed, conducting up to 30A continuously with minimal voltage drop.

Use Value: 45V V_RRM provides sufficient margin over 48V nominal bus; 0.45V VF limits insertion loss to <1.5W per diode at full load.

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-30CPH045	Same 45V V_RRM, 30A I_F, TO-247AC package; VF = 0.52V (max) @ 15A/25°C - 70mV higher typical VF than TST30U45C	Higher thermal mass but larger footprint; requires different heatsink interface and PCB layout	Choose when higher surge rating (320A IFSM) or legacy TO-247 compatibility is required
ON Semiconductor MBR3045CT	45V V_RRM, 30A I_F, TO-220AB package; VF = 0.57V (max) @ 15A/25°C - 120mV higher max VF than TST30U45C	Single-die construction; higher R_θJC (5.5°C/W) limits thermal headroom at high ambient	Choose when second-source qualification is mandated and 0.07V higher VF is acceptable in thermal budget

Compared with VS-30CPH045 and MBR3045CT, the TST30U45C delivers the lowest typical forward voltage in TO-220AB, tighter thermal resistance, and dual-die robustness - making it optimal for space-constrained, high-efficiency 45V-output power supplies where conduction loss and thermal margin are critical.

Availability

TST30U45C is available at Aetrix Electronics and suitable for switching mode power supplies, DC-DC converters, and AC adapters requiring stable component supply, consistent parametric performance, and RoHS-compliant sourcing.

Supply support for TST30U45C 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 Company (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in power rectifiers, TVS devices, and MOSFETs for industrial and computing markets.

The TST30UxxC series was designed specifically for high-current, low-VF output rectification in compact AC-DC and isolated DC-DC converters - emphasizing thermal efficiency, surge resilience, and regulatory compliance in cost-sensitive power systems.

FAQ

What is the maximum junction temperature rating for the TST30U45C?

The TST30U45C has a maximum junction temperature (T_J(max)) of +150°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet (Version E2104). This rating allows reliable operation in industrial environments with elevated ambient temperatures, provided thermal design maintains junction temperature below this limit using the specified R_θJC = 4°C/W and appropriate heatsinking. The TST30U45C must not be operated beyond this temperature under any condition.

Does the TST30U45C have a center-tab TO-220AB configuration?

Yes, the TST30U45C uses a standard TO-220AB package with three leads: the metal tab is the anode, lead 2 is the cathode, and lead 3 is a non-connected (NC) dummy lead. Polarity is marked on the device body per datasheet marking diagram. The tab is electrically active and must be electrically isolated from the heatsink unless referenced to system ground.

What is the typical forward voltage of the TST30U45C at 15A and 125°C?

The typical forward voltage of the TST30U45C is 0.40 V at 15A and 125°C, as specified in the Electrical Specifications table (Version E2104). This value reflects the device's excellent high-temperature VF stability - a key advantage of its trench Schottky architecture - and is measured under pulse conditions (PW = 0.3ms) to avoid self-heating effects during test.

Is the TST30U45C halogen-free and RoHS compliant?

Yes, the TST30U45C is both RoHS compliant and halogen-free in accordance with IEC 61249-2-21, as explicitly stated in the FEATURES section of the Taiwan Semiconductor datasheet (Version E2104). The molding compound contains no brominated or chlorinated flame retardants, satisfying environmental requirements for consumer, industrial, and telecom end equipment.

What is the surge current rating of the TST30U45C and how is it tested?

The TST30U45C has a non-repetitive peak forward surge current (I_FSM) rating of 250 A, tested using an 8.3 ms single half-sine wave superimposed on rated load, per JEDEC standards. This rating is confirmed in the Absolute Maximum Ratings table (Version E2104) and validated by Fig.7 Characteristics Curve. It supports transient overload events such as inrush current in power supplies without degradation.

TST30U45C Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Active

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 45 V

Current - Average Rectified (Io):: 15A

Voltage - Forward (Vf) (Max) @ If:: 540 mV @ 15 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 500 µA @ 45 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220AB

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

TST30U45C FAQ

1.How can I place an order for TST30U45C through Aetrix?

Please submit a Request for Quotation (RFQ) for TST30U45C 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 TST30U45C reliable?

The price and inventory of TST30U45C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TST30U45C is usually 5 days.

3.What payment methods are accepted for TST30U45C?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TST30U45C transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TST30U45C?

TST30U45C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TST30U45C 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 TST30U45C?

For technical support, including TST30U45C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TST30U45C requirements.

6.How does Aetrix verify that TST30U45C is sourced from the original manufacturer or authorized distributors?

All TST30U45C 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 TST30U45C meets industry standards.

7.What is the process for return or replacement of TST30U45C?

All TST30U45C units undergo pre-shipment inspection (PSI). If there is an issue with TST30U45C, 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 TST30U45C part is unused and in its original packaging.

Return procedure for TST30U45C:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

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, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

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.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

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.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

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…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

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…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

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…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

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 …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

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…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

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…