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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Diode Arrays

Taiwan Semiconductor Corporation TSF30U45C

Name: TSF30U45C
Brand: Taiwan Semiconductor Corporation
SKU: TSF30U45C
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TSF30U45C

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Diode Arrays

Package:: TO-220-3 Full Pack, Isolated Tab

Datasheet:: TSF30U45C.pdf

Description:: DIODE ARR SCHOT 45V 15A ITO220AB

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Product details

Overview

TSF30U45C from Taiwan Semiconductor is a 30A, 45V low-forward-voltage trench Schottky rectifier in ITO-220AB package, featuring dual-die configuration, 0.45 V typical VF at 15 A/25°C, 250 A IFSM surge rating, and 150°C maximum junction temperature-used in high-efficiency DC/DC converters and SMPS secondary-side rectification.

For engineers reviewing the TSF30U45C datasheet, TSF30U45C pinout, TSF30U45C application, or TSF30U45C equivalent, key selection considerations include forward voltage at elevated temperature, thermal resistance (R_θJC = 4°C/W), isolation voltage (1500 V_AC), and RoHS/halogen-free compliance for industrial power designs.

Technical Context

The TSF30U45C employs patented trench Schottky technology to achieve stable VF performance across -55°C to +150°C junction range, with VF dropping to 0.415 V (typ) at 15 A/125°C-enabling reduced conduction loss in thermally constrained environments. Its dual-die structure supports parallel current paths while maintaining single-device footprint and thermal interface.

With 10,000 V/µs dv/dt rating and 1500 V_AC isolation between terminals and heatsink, the TSF30U45C meets stringent noise immunity and safety requirements in isolated DC/DC topologies. Reverse leakage remains ≤100 mA at 125°C, ensuring reliable blocking under high-temperature transient conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	45 V - Maximum repetitive reverse voltage; defines safe operating limit in flyback or forward converter secondary circuits
I_F	30 A - Continuous average forward current at case temperature ≤75°C; determines heatsink sizing in 24/48 V output rails
I_FSM	250 A - Non-repetitive surge current (8.3 ms half-sine); withstands inrush and short-circuit transients without failure
V_F (15 A, 25°C)	0.450 V (typ) - Low conduction loss enables >95% efficiency in 12 V–48 V output stages at full load
R_θJC	4 °C/W - Junction-to-case thermal resistance; allows direct mounting to heatsink with minimal thermal interface resistance
V_AC (isolation)	1500 V_AC, 1 min - Terminal-to-heatsink isolation voltage; satisfies reinforced insulation requirements per IEC 62368-1
T_J max	+150 °C - Maximum junction temperature; supports operation in sealed enclosures or high-ambient industrial environments

Pinout & Package

Package: ITO-220AB - Insulated TO-220 variant with integral heatsink tab electrically isolated from leads; matte tin-plated leads compliant with J-STD-002 solderability; UL 94V-0 molding compound; polarity marked on device body.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Lead 1)	Input current terminal	Connected to transformer secondary or switching node; carries full load current into cathode path
Cathode (Lead 2)	Output current terminal	Connected to output capacitor and load; low-VF drop minimizes voltage sag under dynamic load steps
Heatsink Tab (isolated)	Thermal interface only	Electrically isolated from both anode and cathode; mounted directly to chassis or heatsink without insulator required

Key Features

Feature	Design Value
Trench Schottky architecture	Enables 0.415 V VF at 15 A/125°C-reducing conduction loss by ~18% vs planar Schottky at same rating
1500 V_AC terminal-to-heatsink isolation	Eliminates need for thermal pad insulators in isolated topologies, simplifying mechanical assembly and improving thermal transfer
250 A IFSM surge rating	Survives 10× rated current surges during cold-start or output short events without parametric shift or bond-wire fusing
Halogen-free & RoHS-compliant	Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU-required for CE-marked industrial and lighting equipment
10,000 V/µs dv/dt capability	Prevents false turn-on in high-di/dt environments such as synchronous rectification or resonant LLC secondaries

Applications

SMPS Secondary Rectification	On-board DC/DC Converter
Use Scenario: High-frequency flyback or forward converter in telecom power supply delivering 12 V/20 A output. IC Role / Device Role / Timing Role: Primary unidirectional power switch for secondary-side rectification-replaces fast recovery diodes to cut conduction loss. Use Value: 0.45 V VF reduces rectifier power loss by 4.5 W vs 0.7 V diode at 20 A, lowering heatsink mass by 35%.	Use Scenario: Point-of-load (POL) converter on server motherboard stepping 12 V down to 1.2 V for CPU core rail. IC Role / Device Role / Timing Role: Synchronous rectifier freewheeling diode in buck converter topology-operating at 300–500 kHz switching frequency. Use Value: Dual-die layout and 4°C/W R_θJC enable direct heatsink mounting, maintaining <110°C junction temp under 30 A peak load.
LED Driver Power Stage	Laptop Adapter Output Rectification
Use Scenario: Constant-current LED driver for street lighting using boost topology with 48 V output bus. IC Role / Device Role / Timing Role: Output rectifier handling continuous 25 A current with high ambient temperature exposure (>65°C). Use Value: Stable VF down to 0.415 V at 125°C ensures consistent current regulation and prevents thermal runaway across operating life.	Use Scenario: 65 W laptop AC/DC adapter with active clamp flyback, requiring compact, efficient secondary-side rectification. IC Role / Device Role / Timing Role: Low-profile, isolated rectifier mounted on primary-side heatsink via insulated tab-no additional insulator needed. Use Value: 1500 V_AC isolation and ITO-220AB form factor allow PCB space reduction while meeting EN 60950-1 creepage/clearance requirements.

SMPS Secondary Rectification

On-board DC/DC Converter

Use Scenario: High-frequency flyback or forward converter in telecom power supply delivering 12 V/20 A output.

IC Role / Device Role / Timing Role: Primary unidirectional power switch for secondary-side rectification-replaces fast recovery diodes to cut conduction loss.

Use Value: 0.45 V VF reduces rectifier power loss by 4.5 W vs 0.7 V diode at 20 A, lowering heatsink mass by 35%.

Use Scenario: Point-of-load (POL) converter on server motherboard stepping 12 V down to 1.2 V for CPU core rail.

IC Role / Device Role / Timing Role: Synchronous rectifier freewheeling diode in buck converter topology-operating at 300–500 kHz switching frequency.

Use Value: Dual-die layout and 4°C/W R_θJC enable direct heatsink mounting, maintaining <110°C junction temp under 30 A peak load.

LED Driver Power Stage

Laptop Adapter Output Rectification

Use Scenario: Constant-current LED driver for street lighting using boost topology with 48 V output bus.

IC Role / Device Role / Timing Role: Output rectifier handling continuous 25 A current with high ambient temperature exposure (>65°C).

Use Value: Stable VF down to 0.415 V at 125°C ensures consistent current regulation and prevents thermal runaway across operating life.

Use Scenario: 65 W laptop AC/DC adapter with active clamp flyback, requiring compact, efficient secondary-side rectification.

IC Role / Device Role / Timing Role: Low-profile, isolated rectifier mounted on primary-side heatsink via insulated tab-no additional insulator needed.

Use Value: 1500 V_AC isolation and ITO-220AB form factor allow PCB space reduction while meeting EN 60950-1 creepage/clearance requirements.

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 45 V V_RRM, 30 A I_F, but TO-247AC package; R_θJC = 3.5°C/W; VF = 0.49 V (max) @ 15 A/25°C	Higher thermal performance but larger footprint; requires insulating washer due to non-isolated tab	Preferred where board space permits and lower thermal resistance is critical; not drop-in due to different pinout and isolation scheme
ON Semiconductor SB340	Lower rating: 40 V V_RRM, 3 A I_F; DO-201AD package; VF = 0.55 V (max) @ 3 A	Not suitable for 30 A systems; limited to low-power adapters or auxiliary rails	Only viable for prototyping or low-current evaluation-cannot replace TSF30U45C in production 30 A designs

Compared with VS-30CPH045 and SB340, the TSF30U45C uniquely combines ITO-220AB's isolated tab, 30 A rating, and sub-0.45 V VF at 125°C-making it optimal for space-constrained, high-temperature industrial DC/DC converters where electrical isolation and thermal simplicity are prioritized over marginal R_θJC improvement.

Availability

TSF30U45C is available at Aetrix Electronics and suitable for switching mode power supplies, on-board DC/DC converters, and LED lighting drivers requiring stable component supply, long-term lifecycle support, and RoHS/halogen-free compliance.

Supply support for TSF30U45C 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 rectifiers, TVS devices, and MOSFETs since 1979.

The TSF series targets high-efficiency, high-reliability power conversion-designed specifically for industrial SMPS, telecom power, and LED driver applications demanding low VF, high surge tolerance, and robust thermal performance.

FAQ

What is the maximum junction temperature rating for the TSF30U45C?

The TSF30U45C has a maximum junction temperature (T_J) of +150°C, verified per absolute maximum ratings table. This allows sustained operation in enclosed industrial environments where case temperatures reach 100°C, provided thermal design maintains T_J ≤150°C. The TSF30U45C's VF stability up to this limit ensures predictable conduction loss across its full operating range.

Does the TSF30U45C require an insulating pad when mounted to a heatsink?

No-the TSF30U45C uses an ITO-220AB package with electrically isolated heatsink tab rated for 1500 V_AC isolation. No insulating pad or washer is needed between the tab and metal heatsink, unlike standard TO-220AB or TO-247 devices. This simplifies thermal assembly and improves heat transfer efficiency in the TSF30U45C implementation.

What is the typical forward voltage of the TSF30U45C at 15 A and 125°C?

The TSF30U45C exhibits a typical forward voltage (V_F) of 0.415 V at 15 A and 125°C, per electrical specifications table. This value is confirmed under pulse test conditions (PW = 0.3 ms) and reflects the device's superior high-temperature stability-critical for maintaining efficiency in thermally stressed DC/DC converters where the TSF30U45C operates near its thermal limits.

Is the TSF30U45C halogen-free and RoHS compliant?

Yes-the TSF30U45C is certified halogen-free per IEC 61249-2-21 and fully compliant with EU RoHS Directive 2011/65/EU. The molding compound contains no brominated flame retardants or chlorine-based additives, and lead content is below 1000 ppm. This compliance is documented in Taiwan Semiconductor's material declarations and applies to all production lots of the TSF30U45C.

What does the marking code "TSF30U45C" indicate on the device body?

The marking code "TSF30U45C" on the TSF30U45C device body corresponds exactly to the orderable part number and confirms the device is the 30 A / 45 V trench Schottky rectifier in ITO-220AB package. Additional markings include date code (YWW), factory code (F), and green compound indicator (G)-all consistent with Taiwan Semiconductor's standard ITO-220AB labeling for the TSF30U45C.

TSF30U45C Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: TO-220-3 Full Pack, Isolated Tab

Packaging:: Tube

Product Status:: Active

Diode Configuration:: 1 Pair Common Cathode

Technology:: Schottky

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

Current - Average Rectified (Io) (per Diode):: 15A

Voltage - Forward (Vf) (Max) @ If:: 500 mV @ 15 A

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

Reverse Recovery Time (trr):: -

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

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: ITO-220AB

TSF30U45C FAQ

1.How can I place an order for TSF30U45C through Aetrix?

Please submit a Request for Quotation (RFQ) for TSF30U45C 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 TSF30U45C reliable?

The price and inventory of TSF30U45C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSF30U45C is usually 5 days.

3.What payment methods are accepted for TSF30U45C?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSF30U45C transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TSF30U45C?

TSF30U45C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TSF30U45C 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 TSF30U45C?

For technical support, including TSF30U45C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSF30U45C requirements.

6.How does Aetrix verify that TSF30U45C is sourced from the original manufacturer or authorized distributors?

All TSF30U45C 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 TSF30U45C meets industry standards.

7.What is the process for return or replacement of TSF30U45C?

All TSF30U45C units undergo pre-shipment inspection (PSI). If there is an issue with TSF30U45C, 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 TSF30U45C part is unused and in its original packaging.

Return procedure for TSF30U45C:

1.Submit a request within 90 days.

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

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