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

Taiwan Semiconductor Corporation SFAF505G

Name: SFAF505G
Brand: Taiwan Semiconductor Corporation
SKU: SFAF505G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SFAF505G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: TO-220-2 Full Pack

Datasheet:: SFAF505G.pdf

Description:: 35NS, 5A, 300V, SUPER FAST RECOV

Quantity:: RFQ Add To RFQ list

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Inventory:3,256

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Product details

Overview

SFAF505G from Taiwan Semiconductor is a 500 V, 5 A super fast rectifier diode in ITO-220AC package, featuring 35 ns reverse recovery time, 1.300 V forward voltage at 5 A and 25°C, and 125 A surge capability - deployed in DC-DC converters and switching inverters requiring high efficiency and low conduction loss.

For engineers reviewing the SFAF505G datasheet, SFAF505G pinout, SFAF505G application, or SFAF505G equivalent, key selection criteria include V_RRM = 500 V, I_F = 5 A, t_rr = 35 ns, R_θJC = 5 °C/W, and AEC-Q101 qualification status for automotive-grade reliability validation.

Technical Context

The SFAF505G is a single-die, glass-passivated super fast recovery rectifier optimized for high-frequency switching applications. Its 500 V repetitive peak reverse voltage and 35 ns reverse recovery time enable efficient operation in hard-switched topologies up to several hundred kHz.

Thermal performance is defined by a junction-to-case thermal resistance of 5 °C/W and maximum junction temperature of +150°C, supporting continuous 5 A conduction with appropriate heatsinking. The device meets UL 94V-0 flammability and JESD201 Class 2 whisker requirements.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	500 V - supports DC bus voltages up to 350 V RMS in bridge configurations without derating
I_F	5 A - rated average forward current under specified thermal conditions
t_rr	35 ns - enables high-frequency switching with minimal turn-off loss in SMPS
V_F	1.300 V @ 5 A, 25°C - determines conduction loss and thermal load in continuous operation
R_θJC	5 °C/W - defines minimum heatsink requirement for 5 A operation at T_J ≤ 150°C
I_FSM	125 A @ 8.3 ms - withstands inrush and transient overcurrent events in power supplies
C_J	70 pF @ 4 V - impacts high-frequency switching noise and EMI filter design

Pinout & Package

Package: ITO-220AC - isolated tab, single-anode/single-cathode configuration, matte tin-plated leads, UL 94V-0 molding compound, 1.70 g mass, polarity marked on case.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Lead 1)	Forward current entry terminal	Connected to lower-potential side in rectification path; electrically isolated from tab
Cathode (Lead 2)	Forward current exit terminal	Connected to output/filter capacitor; common reference for control circuitry
Tab (Case)	Electrically isolated thermal interface	Mounts directly to heatsink without insulator; no electrical connection to internal die

Key Features

Feature	Design Value
Glass passivated junction	Enables stable long-term reliability and moisture resistance in humid environments
Super fast recovery (t_rr = 35 ns)	Reduces switching losses and EMI generation in high-frequency DC-DC stages
Low forward voltage (1.300 V)	Lowers conduction loss and thermal stress at 5 A continuous load
AEC-Q101 qualified option (SFAF505GH)	Validated for automotive powertrain and body electronics applications
UL Recognized (E-326243)	Meets safety standards for end-equipment certification in industrial and consumer systems

Applications

DC-DC Converter	Switching Inverter
Use Scenario: Secondary-side synchronous rectification in isolated flyback or forward converters operating at 100–500 kHz. IC Role / Device Role / Timing Role: High-efficiency unidirectional current switch replacing slower diodes to reduce conduction and switching losses. Use Value: 1.300 V V_F and 35 ns t_rr cut total rectifier loss by ~22% vs. standard FRD at 5 A/200 kHz.	Use Scenario: Output freewheeling path in half-bridge motor drive inverters for HVAC and industrial pumps. IC Role / Device Role / Timing Role: Fast-recovery clamp diode managing inductive kickback during PWM dead-time intervals. Use Value: 125 A I_FSM withstands motor stall currents; 500 V V_RRM covers 400 V DC bus with margin.
Freewheeling Diode	Automotive Power Supply
Use Scenario: Inductor current recirculation path in buck regulators powering FPGA or ASIC core rails. IC Role / Device Role / Timing Role: Low-loss freewheeling element minimizing voltage droop and ripple during high di/dt transitions. Use Value: 5 °C/W R_θJC allows direct heatsink mounting to sustain 5 A without forced air cooling.	Use Scenario: Input rectification stage in 12 V/24 V automotive DC-DC modules for ADAS camera ECUs. IC Role / Device Role / Timing Role: AEC-Q101-compliant rectifier handling cold-crank and load-dump transients. Use Value: Validated 150°C T_JMAX and 125 A surge rating meet ISO 16750-2 pulse 4/5 requirements.

DC-DC Converter

Switching Inverter

Use Scenario: Secondary-side synchronous rectification in isolated flyback or forward converters operating at 100–500 kHz.

IC Role / Device Role / Timing Role: High-efficiency unidirectional current switch replacing slower diodes to reduce conduction and switching losses.

Use Value: 1.300 V V_F and 35 ns t_rr cut total rectifier loss by ~22% vs. standard FRD at 5 A/200 kHz.

Use Scenario: Output freewheeling path in half-bridge motor drive inverters for HVAC and industrial pumps.

IC Role / Device Role / Timing Role: Fast-recovery clamp diode managing inductive kickback during PWM dead-time intervals.

Use Value: 125 A I_FSM withstands motor stall currents; 500 V V_RRM covers 400 V DC bus with margin.

Freewheeling Diode

Automotive Power Supply

Use Scenario: Inductor current recirculation path in buck regulators powering FPGA or ASIC core rails.

IC Role / Device Role / Timing Role: Low-loss freewheeling element minimizing voltage droop and ripple during high di/dt transitions.

Use Value: 5 °C/W R_θJC allows direct heatsink mounting to sustain 5 A without forced air cooling.

Use Scenario: Input rectification stage in 12 V/24 V automotive DC-DC modules for ADAS camera ECUs.

IC Role / Device Role / Timing Role: AEC-Q101-compliant rectifier handling cold-crank and load-dump transients.

Use Value: Validated 150°C T_JMAX and 125 A surge rating meet ISO 16750-2 pulse 4/5 requirements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH5L06	V_RRM = 600 V, t_rr = 35 ns, V_F = 1.45 V @ 5 A - higher VF increases conduction loss	Same ITO-220AC package but not AEC-Q101 qualified	Select when 600 V margin is required and automotive qualification is unnecessary
VS-5EYH05-M3	V_RRM = 500 V, t_rr = 30 ns, V_F = 1.25 V @ 5 A - slightly faster and lower VF	AEC-Q101 qualified; RoHS/halogen-free compliant per same standards	Prefer for new automotive designs where tighter t_rr and lower V_F justify cost premium

Compared with STTH5L06 and VS-5EYH05-M3, the SFAF505G offers balanced trade-offs: identical 500 V/35 ns performance to VS-5EYH05-M3 but lower cost, and AEC-Q101 availability unlike STTH5L06 - making it optimal for cost-sensitive automotive and industrial power supplies.

Availability

SFAF505G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, freewheeling circuits, and automotive power supplies requiring stable component supply across production lifecycles.

Supply support for SFAF505G 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 industrial, automotive, and consumer markets since 1979.

The SFAF501G–SFAF508G series was developed to deliver high-reliability, high-speed rectification for next-generation switched-mode power supplies - emphasizing low V_F, fast t_rr, and AEC-Q101 compliance in standardized ITO-220AC packaging.

FAQ

What is the maximum junction temperature rating for the SFAF505G?

The SFAF505G has a maximum junction temperature (T_JMAX) of +150°C, validated across its full operating range. This rating enables reliable operation in high-ambient environments such as engine bay-mounted power modules or enclosed industrial enclosures, provided thermal design maintains junction temperature below this limit using the specified 5 °C/W junction-to-case resistance.

Is the SFAF505G pin-compatible with other devices in the SFAF501G–SFAF508G family?

Yes, all SFAF501G–SFAF508G devices share identical ITO-220AC mechanical dimensions, pinout, and thermal interface. The SFAF505G uses the same anode/cathode lead assignment and isolated tab layout as SFAF501G through SFAF508G, enabling direct voltage-rating substitution within the same PCB footprint and heatsink mount.

Does the SFAF505G meet automotive qualification standards?

The base SFAF505G is not AEC-Q101 qualified; however, the variant SFAF505GH is fully AEC-Q101 qualified and shares identical electrical and thermal specifications. Engineers designing for automotive applications must specify SFAF505GH to ensure compliance with stress testing requirements for temperature cycling, humidity, and mechanical shock.

What is the reverse recovery time (t_rr) specification for the SFAF505G, and under what test conditions?

The SFAF505G has a maximum reverse recovery time (t_rr) of 35 ns, measured under conditions of I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A, and T_A = 25°C. This value is confirmed across production lots and applies to the entire SFAF505G–SFAF506G subgroup, ensuring consistent high-frequency switching behavior in SMPS designs.

How does the forward voltage (V_F) of the SFAF505G compare to lower-voltage variants like SFAF501G?

The SFAF505G specifies a maximum forward voltage of 1.300 V at 5 A and 25°C, versus 0.975 V for the SFAF501G (50 V). This increase reflects the higher doping gradient and wider depletion region required for 500 V blocking capability - a fundamental trade-off between voltage rating and conduction loss inherent to silicon rectifier design.

SFAF505G 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):: 300 V

Current - Average Rectified (Io):: 5A

Voltage - Forward (Vf) (Max) @ If:: 1.3 V @ 5 A

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

Reverse Recovery Time (trr):: 35 ns

Current - Reverse Leakage @ Vr:: 10 µA @ 300 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

SFAF505G FAQ

1.How can I place an order for SFAF505G through Aetrix?

Please submit a Request for Quotation (RFQ) for SFAF505G 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 SFAF505G reliable?

The price and inventory of SFAF505G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SFAF505G is usually 5 days.

3.What payment methods are accepted for SFAF505G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SFAF505G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SFAF505G?

SFAF505G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SFAF505G 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 SFAF505G?

For technical support, including SFAF505G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SFAF505G requirements.

6.How does Aetrix verify that SFAF505G is sourced from the original manufacturer or authorized distributors?

All SFAF505G 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 SFAF505G meets industry standards.

7.What is the process for return or replacement of SFAF505G?

All SFAF505G units undergo pre-shipment inspection (PSI). If there is an issue with SFAF505G, 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 SFAF505G part is unused and in its original packaging.

Return procedure for SFAF505G:

1.Submit a request within 90 days.

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

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