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

Taiwan Semiconductor Corporation SFAF506G

Name: SFAF506G
Brand: Taiwan Semiconductor Corporation
SKU: SFAF506G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SFAF506G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: TO-220-2 Full Pack

Datasheet:: SFAF506G.pdf

Description:: DIODE GEN PURP 400V 5A ITO220AC

Quantity:: RFQ Add To RFQ list

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Inventory:1,000

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Product details

Overview

SFAF506G from Taiwan Semiconductor is a 5 A, 400 V repetitive peak reverse voltage (V_RRM) super fast rectifier diode in ITO-220AC package, featuring 35 ns reverse recovery time (t_rr), 1.300 V forward voltage at 5 A/25°C, and 125 A surge current capability - used as freewheeling or output rectification diode in high-frequency switching power supplies.

For engineers reviewing the SFAF506G datasheet, SFAF506G pinout, SFAF506G application, or SFAF506G equivalent, key selection criteria include V_RRM = 400 V, t_rr ≤ 35 ns, thermal resistance R_θJC = 5 °C/W, and AEC-Q101 qualification availability (SFAF506GH variant).

Technical Context

The SFAF506G employs a glass-passivated silicon junction for enhanced reliability and moisture resistance, optimized for high-efficiency DC–DC conversion where low conduction loss and fast switching are critical. Its single-die construction and ITO-220AC thermally efficient package support continuous 5 A operation up to 150 °C junction temperature.

With a typical junction capacitance of 70 pF at 4 V reverse bias and reverse leakage of ≤10 µA at 25 °C, the device maintains low dynamic losses in high-frequency inverters and SMPS topologies requiring tight control of recovery-related ringing and EMI.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	400 V - supports 400 V DC bus or 280 V RMS input in offline SMPS designs
I_F	5 A continuous - rated for sustained output rectification in 60–100 W converters
t_rr	35 ns max - enables operation up to ~500 kHz with minimal switching loss and voltage overshoot
V_F	1.300 V @ 5 A, 25°C - contributes <6.5 W conduction loss per diode at full load
R_θJC	5 °C/W - allows ~100 W dissipation margin before reaching 150 °C junction under forced-air cooling
I_FSM	125 A @ 8.3 ms - withstands startup surges and short-circuit transients without failure
Junction temp	−55 to +150 °C - qualified for under-hood automotive and industrial ambient environments

Pinout & Package

ITO-220AC package: 3-terminal through-hole outline with isolated tab (cathode-connected tab), matte tin-plated leads, UL 94V-0 molding compound, 1.70 g mass, and 0.56 N·m maximum mounting torque.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Lead 1)	Input current entry	Connected to switching node or transformer secondary; requires PCB copper pour for thermal relief
Cathode (Tab)	Output current exit	Electrically and thermally connected to heatsink; must be insulated if chassis-ground referenced
NC / Mechanical Tab	Mounting interface	Non-electrical mechanical anchor; polarity marked on device body adjacent to cathode symbol

Key Features

Feature	Design Value
Glass passivated junction	Prevents moisture ingress and metallization corrosion, extending lifetime in humid or automotive under-hood conditions
Super fast recovery (t_rr ≤ 35 ns)	Reduces reverse recovery charge (Q_rr) and associated switching losses vs. standard rectifiers
Low V_F = 1.300 V @ 5 A	Lowers conduction loss by ~15% compared to comparable 400 V fast diodes with V_F > 1.5 V
UL Recognized (E-326243)	Validates flammability, insulation integrity, and long-term safety compliance for end-equipment certification
AEC-Q101 qualified option	SFAF506GH variant meets stress test requirements for automotive power electronics (e.g., EPS, lighting, ADAS)

Applications

DC–DC Converter Output Rectification	Switching Inverter Freewheeling
Use Scenario: Secondary-side synchronous or non-synchronous rectification in isolated 48 V–400 V input DC–DC modules delivering 5–10 A. IC Role / Device Role / Timing Role: Unidirectional current valve conducting during flyback or forward cycle; reverse-biased during switch-on phase. Use Value: 35 ns t_rr minimizes voltage spikes across MOSFETs and reduces snubber losses in 200–500 kHz designs.	Use Scenario: Freewheeling path for inductive loads (e.g., motor windings, solenoids) in half-bridge inverters operating at 20–100 kHz. IC Role / Device Role / Timing Role: Provides low-loss return path when main switch turns off; clamps inductive kickback. Use Value: 125 A I_FSM handles 10× nominal current surges during motor stall or fault events without degradation.
Industrial SMPS Input Stage	Automotive On-Board Charger (OBC) Auxiliary Supply
Use Scenario: PFC boost diode or post-regulator rectifier in 300–400 V rail industrial power supplies. IC Role / Device Role / Timing Role: Conducts during positive half-cycle of AC line or PFC output ripple; blocks reverse voltage during negative swing. Use Value: 400 V V_RRM provides 20% margin over 340 V DC link, ensuring robustness against line transients.	Use Scenario: Auxiliary 12 V supply rectification in bi-directional OBCs where space-constrained layout demands high thermal density. IC Role / Device Role / Timing Role: Converts transformer-isolated AC to regulated DC for gate drivers, MCU, and sensors. Use Value: ITO-220AC package with R_θJC = 5 °C/W enables direct heatsink mounting, reducing thermal interface layers and footprint vs. SMD alternatives.

DC–DC Converter Output Rectification

Switching Inverter Freewheeling

Use Scenario: Secondary-side synchronous or non-synchronous rectification in isolated 48 V–400 V input DC–DC modules delivering 5–10 A.

IC Role / Device Role / Timing Role: Unidirectional current valve conducting during flyback or forward cycle; reverse-biased during switch-on phase.

Use Value: 35 ns t_rr minimizes voltage spikes across MOSFETs and reduces snubber losses in 200–500 kHz designs.

Use Scenario: Freewheeling path for inductive loads (e.g., motor windings, solenoids) in half-bridge inverters operating at 20–100 kHz.

IC Role / Device Role / Timing Role: Provides low-loss return path when main switch turns off; clamps inductive kickback.

Use Value: 125 A I_FSM handles 10× nominal current surges during motor stall or fault events without degradation.

Industrial SMPS Input Stage

Automotive On-Board Charger (OBC) Auxiliary Supply

Use Scenario: PFC boost diode or post-regulator rectifier in 300–400 V rail industrial power supplies.

IC Role / Device Role / Timing Role: Conducts during positive half-cycle of AC line or PFC output ripple; blocks reverse voltage during negative swing.

Use Value: 400 V V_RRM provides 20% margin over 340 V DC link, ensuring robustness against line transients.

Use Scenario: Auxiliary 12 V supply rectification in bi-directional OBCs where space-constrained layout demands high thermal density.

IC Role / Device Role / Timing Role: Converts transformer-isolated AC to regulated DC for gate drivers, MCU, and sensors.

Use Value: ITO-220AC package with R_θJC = 5 °C/W enables direct heatsink mounting, reducing thermal interface layers and footprint vs. SMD alternatives.

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 = 1.7 V @ 5 A - higher V_F, wider voltage rating	Better suited for 600 V systems; less efficient at 400 V due to higher conduction loss	Select when system requires ≥500 V blocking with same speed; verify thermal derating at 1.7 V V_F
ON Semi MUR540	V_RRM = 400 V, t_rr = 35 ns, V_F = 1.25 V @ 5 A - slightly lower V_F, no AEC-Q101 option	Preferred for cost-sensitive industrial SMPS; not qualified for automotive use	Choose for non-automotive 400 V designs prioritizing lowest V_F; confirm RoHS/halogen-free compliance matches design requirements

Compared with STTH5L06 and MUR540, the SFAF506G offers balanced 400 V rating, 1.300 V V_F, and optional AEC-Q101 qualification - making it optimal for automotive auxiliary supplies and industrial converters needing verified reliability at moderate voltage stress.

Availability

SFAF506G is available at Aetrix Electronics and suitable for DC–DC converters, switching inverters, and freewheeling applications requiring stable component supply, automotive-grade traceability, and thermal performance in compact through-hole packages.

Supply support for SFAF506G 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 diodes, and MOSFETs for industrial and automotive markets.

The SFAF506G belongs to TSC's Super Fast Rectifier family, engineered for high-frequency switching power conversion where low recovery loss, thermal robustness, and long-term reliability under cyclic stress are primary design goals.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for the SFAF506G?

The SFAF506G has a V_RRM of 400 V, confirmed in the Absolute Maximum Ratings table across all versions of the SFAF501G–SFAF508G datasheet. This rating defines the highest instantaneous reverse voltage the diode can block repeatedly without breakdown, and is validated under standard test conditions at T_A = 25°C.

Does the SFAF506G have AEC-Q101 qualification?

The base SFAF506G is not AEC-Q101 qualified; however, the SFAF506GH variant - indicated by the "H" suffix in the ordering code - is explicitly listed as AEC-Q101 qualified in the Ordering Information section. This qualification covers stress tests including HTGB, HTRB, and temperature cycling per AEC-Q101 Rev D.

What is the forward voltage (V_F) of the SFAF506G at rated current?

The SFAF506G exhibits a maximum forward voltage of 1.300 V at I_F = 5 A and T_J = 25°C, as specified in the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) to minimize self-heating, and increases with junction temperature per the Typical Forward Characteristics curve.

What package type does the SFAF506G use, and is the tab electrically active?

The SFAF506G uses the ITO-220AC package, with the metal tab serving as the cathode terminal. The datasheet confirms polarity marking on the device body and specifies that the tab is electrically connected to the cathode - requiring electrical isolation from the heatsink unless circuit topology permits common-cathode mounting.

How does the SFAF506G compare to the SFAF505G and SFAF507G in terms of voltage rating and forward voltage?

The SFAF506G is rated for 400 V V_RRM and has V_F ≤ 1.300 V, positioned between SFAF505G (300 V, V_F ≤ 1.300 V) and SFAF507G (500 V, V_F ≤ 1.700 V). All share identical I_F, I_FSM, t_rr, and package - enabling voltage-tiered selection within the same thermal and layout footprint.

SFAF506G 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):: 400 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 @ 400 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

SFAF506G FAQ

1.How can I place an order for SFAF506G through Aetrix?

Please submit a Request for Quotation (RFQ) for SFAF506G 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 SFAF506G reliable?

The price and inventory of SFAF506G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SFAF506G is usually 5 days.

3.What payment methods are accepted for SFAF506G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SFAF506G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SFAF506G?

SFAF506G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SFAF506G 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 SFAF506G?

For technical support, including SFAF506G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SFAF506G requirements.

6.How does Aetrix verify that SFAF506G is sourced from the original manufacturer or authorized distributors?

All SFAF506G 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 SFAF506G meets industry standards.

7.What is the process for return or replacement of SFAF506G?

All SFAF506G units undergo pre-shipment inspection (PSI). If there is an issue with SFAF506G, 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 SFAF506G part is unused and in its original packaging.

Return procedure for SFAF506G:

1.Submit a request within 90 days.

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

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