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

Taiwan Semiconductor Corporation SFAF502G

Name: SFAF502G
Brand: Taiwan Semiconductor Corporation
SKU: SFAF502G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SFAF502G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: TO-220-2 Full Pack

Datasheet:: SFAF502G.pdf

Description:: 35NS, 5A, 100V, SUPER FAST RECOV

Quantity:: RFQ Add To RFQ list

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Inventory:4,007

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Product details

Overview

SFAF502G from Taiwan Semiconductor is a 5A, 100V repetitive peak reverse voltage super fast rectifier diode in ITO-220AC package, featuring 35ns reverse recovery time, 0.975V forward voltage at 5A/25°C, and AEC-Q101 qualification option (SFAF502GH). It serves as a freewheeling or output rectifier in high-frequency DC-DC converters.

For engineers reviewing the SFAF502G datasheet, SFAF502G pinout, SFAF502G application, or SFAF502G equivalent, key selection criteria include V_RRM=100V, I_F=5A, t_rr=35ns, R_θJC=5°C/W, and UL recognition (E-326243), especially for automotive-grade power conversion designs requiring low conduction loss and fast switching.

Technical Context

The SFAF502G employs a glass-passivated single-die silicon junction optimized for super-fast recovery, enabling efficient operation in switching-mode power supplies operating up to several hundred kHz. Its 100V V_RRM rating and 125A I_FSM surge capability support robust transient handling in flyback and forward converter topologies.

Thermally, the ITO-220AC package delivers 5°C/W junction-to-case resistance, allowing sustained 5A conduction at T_J ≤ 150°C with appropriate heatsinking. Reverse leakage remains ≤10µA at 25°C and ≤400µA at 125°C, ensuring stable blocking performance across automotive temperature ranges.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - Maximum repetitive reverse voltage the device blocks reliably in circuit
I_F	5 A - Continuous average forward current rating at case temperature ≤ 100°C
t_rr	35 ns - Reverse recovery time defining minimum dead-time requirements in synchronous rectification
V_F	0.975 V @ 5A/25°C - Forward voltage drop directly determining conduction loss and thermal load
R_θJC	5 °C/W - Thermal resistance from junction to case, critical for heatsink sizing in high-power density designs
I_FSM	125 A - Non-repetitive surge current capacity for handling inrush or fault transients

Pinout & Package

Package: ITO-220AC - Insulated TO-220 variant with isolated metal tab, matte tin-plated leads, UL 94V-0 molding compound, and polarity marking per device body.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Lead 1)	Forward current entry point	Connected to lower-potential node (e.g., switch node in flyback); requires PCB trace width matching 5A continuous rating
Cathode (Lead 2)	Forward current exit / reverse blocking terminal	Connected to output rail or ground return; electrically tied to isolated metal tab for thermal path
Metal Tab (Case)	Thermal interface / electrical isolation	Electrically isolated from both leads; used for mechanical mounting and heatsinking without additional insulator required

Key Features

Feature	Design Value
Super fast recovery (t_rr = 35 ns)	Enables high-frequency switching (>100 kHz) with minimal switching loss and EMI generation
Glass passivated junction	Ensures long-term reliability and moisture resistance in harsh environments including automotive under-hood applications
AEC-Q101 qualified version available (SFAF502GH)	Validated for automotive electronics per stress test requirements including temperature cycling and HTRB
UL Recognized (E-326243)	Confirms compliance with safety standards for end-equipment certification in industrial and consumer power supplies

Applications

Automotive DC-DC Converters	Industrial SMPS Output Rectification
Use Scenario: 12V-to-5V/3.3V buck converter in ADAS camera module requiring high efficiency and AEC-Q101 compliance. IC Role / Device Role / Timing Role: Output rectifier replacing Schottky diodes where higher V_RRM margin and lower leakage are needed. Use Value: 0.975V V_F reduces conduction loss vs. standard FRDs; 35ns t_rr minimizes switching loss at 250kHz operation.	Use Scenario: Secondary-side rectification in 48V-input telecom power supply with 12V/20A output. IC Role / Device Role / Timing Role: Freewheeling diode in forward converter, conducting during MOSFET off-time. Use Value: 125A I_FSM withstands startup surges; R_θJC=5°C/W enables compact heatsink design at full load.
LED Driver Flyback Rectification	UPS Inverter Freewheeling
Use Scenario: Isolated flyback LED driver for street lighting with 100–277V AC input and constant-current output. IC Role / Device Role / Timing Role: Primary-side snubber clamp and secondary-side output rectifier in dual-role configuration. Use Value: 100V V_RRM provides sufficient margin over reflected output voltage; glass passivation ensures long life in outdoor thermal cycling.	Use Scenario: Bidirectional freewheeling path in 3-phase IGBT-based UPS inverter bridge. IC Role / Device Role / Timing Role: Anti-parallel freewheeling diode across IGBTs, conducting reactive current during PWM dead-time. Use Value: Fast 35ns t_rr prevents shoot-through risk; 150°C T_JMAX supports operation in enclosed UPS enclosures.

Automotive DC-DC Converters

Industrial SMPS Output Rectification

Use Scenario: 12V-to-5V/3.3V buck converter in ADAS camera module requiring high efficiency and AEC-Q101 compliance.

IC Role / Device Role / Timing Role: Output rectifier replacing Schottky diodes where higher V_RRM margin and lower leakage are needed.

Use Value: 0.975V V_F reduces conduction loss vs. standard FRDs; 35ns t_rr minimizes switching loss at 250kHz operation.

Use Scenario: Secondary-side rectification in 48V-input telecom power supply with 12V/20A output.

IC Role / Device Role / Timing Role: Freewheeling diode in forward converter, conducting during MOSFET off-time.

Use Value: 125A I_FSM withstands startup surges; R_θJC=5°C/W enables compact heatsink design at full load.

LED Driver Flyback Rectification

UPS Inverter Freewheeling

Use Scenario: Isolated flyback LED driver for street lighting with 100–277V AC input and constant-current output.

IC Role / Device Role / Timing Role: Primary-side snubber clamp and secondary-side output rectifier in dual-role configuration.

Use Value: 100V V_RRM provides sufficient margin over reflected output voltage; glass passivation ensures long life in outdoor thermal cycling.

Use Scenario: Bidirectional freewheeling path in 3-phase IGBT-based UPS inverter bridge.

IC Role / Device Role / Timing Role: Anti-parallel freewheeling diode across IGBTs, conducting reactive current during PWM dead-time.

Use Value: Fast 35ns t_rr prevents shoot-through risk; 150°C T_JMAX supports operation in enclosed UPS enclosures.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH5L06D (STMicroelectronics)	V_RRM=600V, t_rr=35ns, V_F=1.7V @ 5A - higher voltage rating but higher forward drop	Used in 400V+ PFC stages; less optimal for 100V-class outputs due to excess V_RRM and higher loss	Select when system requires >400V blocking; avoid for 100V applications unless voltage margin is critical
ES5D (ON Semiconductor)	V_RRM=200V, t_rr=35ns, V_F=0.92V @ 5A - lower V_F but no AEC-Q101 option	Common in consumer SMPS; lacks automotive qualification and UL recognition	Prefer for cost-sensitive non-automotive designs where AEC-Q101 and UL are not required

Compared with STTH5L06D and ES5D, the SFAF502G uniquely balances 100V V_RRM, 0.975V V_F, AEC-Q101 availability, and UL recognition-making it optimal for automotive and industrial 12–48V output converters where reliability, efficiency, and certification alignment are jointly critical.

Availability

SFAF502G is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial switch-mode power supplies, and LED driver flyback circuits requiring stable component supply, consistent parametric performance, and long-term lifecycle support.

Supply support for SFAF502G 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 power discrete manufacturer headquartered in Hsinchu, Taiwan, serving global automotive, industrial, and consumer markets since 1979.

The SFAF502G belongs to TSC's Super Fast Rectifier family, engineered specifically for high-efficiency, high-reliability power conversion in space-constrained and thermally demanding applications-including automotive subsystems and industrial power modules.

FAQ

What is the maximum junction temperature rating for the SFAF502G?

The SFAF502G has a maximum junction temperature (T_J) of +150°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet Version I2105. This rating allows operation in under-hood automotive environments and enclosed industrial power supplies when paired with appropriate thermal management. Derating curves confirm 5A continuous current is sustainable up to 100°C case temperature.

Is the SFAF502G pin-compatible with other devices in the SFAF501G–SFAF508G series?

Yes, all SFAF501G through SFAF508G devices share identical ITO-220AC packaging, pinout, and mechanical footprint - only V_RRM and forward voltage vary by part number. The SFAF502G uses the same Anode–Cathode–Tab terminal arrangement and mounting torque specification (0.56 N·m max), enabling direct board-level substitution within the series for voltage rating adjustments.

Does the SFAF502G meet RoHS and halogen-free requirements?

Yes, the SFAF502G is RoHS compliant and halogen-free per IEC 61249-2-21, as explicitly stated in the "Features" section of the Taiwan Semiconductor datasheet. The molding compound is UL 94V-0 rated, and terminals are matte tin-plated to meet J-STD-002 solderability standards - confirming full environmental compliance for modern electronics manufacturing.

What is the reverse recovery time (t_rr) test condition for the SFAF502G?

The SFAF502G reverse recovery time of 35 ns is measured under the conditions specified in the Electrical Specifications table: I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A, with test waveform defined in Figure 6 of the datasheet. This standardized test ensures consistent comparison across super fast rectifiers and validates suitability for high-frequency switching topologies.

Can the SFAF502G be used as a direct replacement for Schottky diodes in 12V-output converters?

The SFAF502G can replace Schottky diodes in 12V-output converters where higher V_RRM margin and lower reverse leakage are prioritized over ultra-low V_F. While its 0.975V V_F is higher than typical Schottkys (~0.4–0.6V), its 100V rating and 35ns t_rr provide superior reliability and EMI performance - especially in automotive or industrial settings where temperature stability and long-term leakage control matter more than marginal conduction loss.

SFAF502G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: TO-220-2 Full Pack

Packaging:: Tube

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 100 V

Current - Average Rectified (Io):: 5A

Voltage - Forward (Vf) (Max) @ If:: 975 mV @ 5 A

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

Reverse Recovery Time (trr):: 35 ns

Current - Reverse Leakage @ Vr:: 10 µA @ 100 V

Capacitance @ Vr, F:: 70pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: ITO-220AC

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

SFAF502G FAQ

1.How can I place an order for SFAF502G through Aetrix?

Please submit a Request for Quotation (RFQ) for SFAF502G 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 SFAF502G reliable?

The price and inventory of SFAF502G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SFAF502G is usually 5 days.

3.What payment methods are accepted for SFAF502G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SFAF502G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SFAF502G?

SFAF502G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SFAF502G 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 SFAF502G?

For technical support, including SFAF502G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SFAF502G requirements.

6.How does Aetrix verify that SFAF502G is sourced from the original manufacturer or authorized distributors?

All SFAF502G 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 SFAF502G meets industry standards.

7.What is the process for return or replacement of SFAF502G?

All SFAF502G units undergo pre-shipment inspection (PSI). If there is an issue with SFAF502G, 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 SFAF502G part is unused and in its original packaging.

Return procedure for SFAF502G:

1.Submit a request within 90 days.

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

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