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

Taiwan Semiconductor Corporation SFAF2002G

Name: SFAF2002G
Brand: Taiwan Semiconductor Corporation
SKU: SFAF2002G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SFAF2002G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: TO-220-2 Full Pack

Datasheet:: SFAF2002G.pdf

Description:: 35NS, 20A, 100V, SUPER FAST RECO

Quantity:: RFQ Add To RFQ list

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Inventory:6,092

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Product details

Overview

SFAF2002G from Taiwan Semiconductor is a 20A, 100V super fast rectifier diode in ITO-220AC package, featuring 0.975V forward voltage at 20A/25°C, 35ns reverse recovery time, and 200A surge capability - used in switching-mode DC-DC converters and freewheeling paths where low conduction loss and fast turn-off are critical.

For engineers reviewing the SFAF2002G datasheet, SFAF2002G pinout, SFAF2002G application, or SFAF2002G equivalent, key selection criteria include V_RRM = 100 V, I_F = 20 A, t_rr = 35 ns, R_θJC = 3 °C/W, and UL recognition per File #E-326243 - all confirmed for this exact variant.

Technical Context

This super fast rectifier uses a glass-passivated single-die silicon junction optimized for high-efficiency switching applications. Its 35 ns reverse recovery time and low 0.975 V forward voltage at rated current enable reduced switching losses and thermal stress in high-frequency converters.

The ITO-220AC package provides direct heatsink mounting with 3 °C/W junction-to-case thermal resistance and supports 200 A non-repetitive surge current under 8.3 ms half-sine conditions - critical for handling transient overloads in industrial power supplies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - maximum repetitive reverse blocking voltage; defines safe operating range in 100 V bus applications
I_F	20 A - continuous average forward current; sets minimum heatsink sizing and PCB trace width requirements
t_rr	35 ns - reverse recovery time at I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A; enables >100 kHz switching without excessive switching loss
V_F	0.975 V @ 20 A, 25°C - forward voltage drop; determines conduction loss (P_cond ≈ 19.5 W at full load)
R_θJC	3 °C/W - junction-to-case thermal resistance; allows direct thermal calculation of case temperature rise under known power dissipation
I_FSM	200 A - peak non-repetitive surge current (8.3 ms sine); supports inrush and fault-current handling in SMPS front ends

Pinout & Package

ITO-220AC package: single-ended, 3-lead outline with isolated tab (cathode-connected), matte tin-plated leads, UL 94V-0 molding compound, and 0.56 N·m max mounting torque.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Lead 1)	Forward current input	Connected to input-side switching node; must withstand full surge current and reverse recovery dv/dt
Cathode (Lead 2)	Forward current output / common reference	Electrically tied to metal tab; requires insulated mounting if referenced to non-ground potential
Tab (Cathode)	Thermal path + cathode terminal	Primary heat transfer surface; electrically identical to Lead 2; must be thermally coupled to heatsink

Key Features

Feature	Design Value
Glass-passivated junction	Enables stable long-term reliability and moisture resistance without hermetic sealing
UL Recognized (E-326243)	Validates safety compliance for end-equipment certification in commercial and industrial power systems
AEC-Q101 qualified option (SFAF2002GH)	Supports automotive-grade deployment in engine control, ADAS power rails, and infotainment DC-DC stages
RoHS & halogen-free (IEC 61249-2-21)	Meets global environmental regulations for lead-free assembly and hazardous substance restrictions

Applications

DC-DC Converter Primary Side	Switching Inverter Freewheel Path
Use Scenario: High-frequency isolated DC-DC converter in telecom power supply delivering 48 V output from 380 V bus. IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier replacement; handles 20 A continuous forward conduction and rapid reverse recovery during MOSFET dead-time. Use Value: 0.975 V V_F reduces conduction loss by ~15% vs. standard FRD; 35 ns t_rr minimizes cross-conduction risk in 200 kHz operation.	Use Scenario: 3-phase motor drive inverter using IGBTs with passive flyback protection on each phase leg. IC Role / Device Role / Timing Role: Freewheeling diode clamping inductive kickback during IGBT turn-off; conducts only during off-state intervals. Use Value: 200 A I_FSM safely absorbs motor winding energy surges; 3 °C/W R_θJC enables compact heatsinking in space-constrained drives.
Industrial SMPS Output Rectification	LED Driver Bulk Capacitor Charging
Use Scenario: 1 kW industrial AC-DC power supply with active PFC and LLC resonant secondary stage. IC Role / Device Role / Timing Role: Output rectifier in LLC synchronous rectification stage; operates at 300–500 kHz with zero-voltage switching assist. Use Value: Low V_F maintains >94% efficiency at full load; glass passivation ensures stability under 85°C ambient and 150°C junction temperature.	Use Scenario: Constant-current LED driver for street lighting, charging bulk electrolytic capacitor after bridge rectification. IC Role / Device Role / Timing Role: Input-stage rectifier feeding boost PFC controller; conducts full-line-frequency half-cycles with high peak current. Use Value: 100 V V_RRM accommodates 85–265 VAC input with margin; 20 A I_F sustains 120 Hz ripple current without derating.

DC-DC Converter Primary Side

Switching Inverter Freewheel Path

Use Scenario: High-frequency isolated DC-DC converter in telecom power supply delivering 48 V output from 380 V bus.

IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier replacement; handles 20 A continuous forward conduction and rapid reverse recovery during MOSFET dead-time.

Use Value: 0.975 V V_F reduces conduction loss by ~15% vs. standard FRD; 35 ns t_rr minimizes cross-conduction risk in 200 kHz operation.

Use Scenario: 3-phase motor drive inverter using IGBTs with passive flyback protection on each phase leg.

IC Role / Device Role / Timing Role: Freewheeling diode clamping inductive kickback during IGBT turn-off; conducts only during off-state intervals.

Use Value: 200 A I_FSM safely absorbs motor winding energy surges; 3 °C/W R_θJC enables compact heatsinking in space-constrained drives.

Industrial SMPS Output Rectification

LED Driver Bulk Capacitor Charging

Use Scenario: 1 kW industrial AC-DC power supply with active PFC and LLC resonant secondary stage.

IC Role / Device Role / Timing Role: Output rectifier in LLC synchronous rectification stage; operates at 300–500 kHz with zero-voltage switching assist.

Use Value: Low V_F maintains >94% efficiency at full load; glass passivation ensures stability under 85°C ambient and 150°C junction temperature.

Use Scenario: Constant-current LED driver for street lighting, charging bulk electrolytic capacitor after bridge rectification.

IC Role / Device Role / Timing Role: Input-stage rectifier feeding boost PFC controller; conducts full-line-frequency half-cycles with high peak current.

Use Value: 100 V V_RRM accommodates 85–265 VAC input with margin; 20 A I_F sustains 120 Hz ripple current without derating.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH2003D	V_RRM = 300 V, V_F = 1.15 V @ 20 A, t_rr = 30 ns, TO-220AC package	Higher voltage rating but higher V_F; suitable where 300 V blocking is required and lower conduction loss is secondary	Select when system requires >100 V reverse margin and can accept +0.175 V forward drop penalty
ON Semi MUR2010CT	Dual common-cathode configuration, V_RRM = 100 V per diode, V_F = 0.92 V @ 10 A, t_rr = 35 ns, TO-220AB package	Offers dual-diode topology for center-tapped or dual-output designs; not single-die like SFAF2002G	Choose for dual-output SMPS or when layout requires separate anodes with shared cathode

Compared with STTH2003D and MUR2010CT, the SFAF2002G delivers lowest forward voltage in its 100 V class while maintaining identical 35 ns recovery and industry-standard ITO-220AC mechanical fit - making it optimal for efficiency-critical 100 V bus rectification where single-diode topology suffices.

Availability

SFAF2002G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and industrial SMPS requiring stable component supply with consistent parametric performance across production lots.

Supply support for SFAF2002G 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, computing, and consumer markets since 1979.

The SFAF2002G belongs to TSC's Super Fast Rectifier family, engineered specifically for high-frequency switching power supplies where low V_F, fast t_rr, and robust surge capability are essential for efficiency and reliability.

FAQ

What is the maximum junction temperature rating for the SFAF2002G?

The SFAF2002G has a maximum junction temperature (T_J) of +150°C, with operational storage temperature ranging from –55°C to +150°C. This rating allows reliable operation in high-ambient environments such as enclosed industrial power supplies or automotive under-hood auxiliary converters when properly heatsinked. The SFAF2002G's thermal design must maintain junction temperature below this limit under worst-case power dissipation.

Is the SFAF2002G RoHS and halogen-free compliant?

Yes, the SFAF2002G is RoHS compliant and halogen-free per IEC 61249-2-21. Its molding compound contains no brominated flame retardants or chlorine-based additives, and all terminations meet EU RoHS Directive 2011/65/EU limits for lead, mercury, cadmium, hexavalent chromium, PBB, and PBDE. This compliance is verified and documented in TSC's material declarations for the SFAF2002G.

Does the SFAF2002G have UL recognition?

Yes, the SFAF2002G is UL Recognized under File #E-326243. This certification confirms compliance with UL 60747-1 for discrete semiconductors, covering electrical insulation, flammability (UL 94V-0), and construction integrity. UL recognition applies to the ITO-220AC package and supports end-equipment safety approvals for the SFAF2002G in commercial and industrial power systems.

What is the reverse recovery time test condition for the SFAF2002G?

The SFAF2002G reverse recovery time (t_rr) is specified as 35 ns under the condition: I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A, measured at 25°C. This standardized test reflects real-world switching behavior in hard-commutated topologies. The SFAF2002G maintains this t_rr value across its rated temperature range, supporting stable timing in high-frequency SMPS designs.

How does the SFAF2002G differ from the AEC-Q101 qualified version SFAF2002GH?

The SFAF2002GH is the AEC-Q101 qualified variant of the SFAF2002G, sharing identical electrical parameters (V_RRM = 100 V, V_F = 0.975 V, t_rr = 35 ns) and mechanical form factor. The SFAF2002GH undergoes additional stress testing per AEC-Q101 including HTGB, TCT, and ESD qualification - enabling use in automotive power modules, body control units, and ADAS subsystems where SFAF2002G is restricted to industrial/commercial applications.

SFAF2002G 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):: 20A

Voltage - Forward (Vf) (Max) @ If:: 975 mV @ 20 A

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

Reverse Recovery Time (trr):: 35 ns

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

Capacitance @ Vr, F:: 170pF @ 4V, 1MHz

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Through Hole

Supplier Device Package:: ITO-220AC

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

SFAF2002G FAQ

1.How can I place an order for SFAF2002G through Aetrix?

Please submit a Request for Quotation (RFQ) for SFAF2002G 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 SFAF2002G reliable?

The price and inventory of SFAF2002G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SFAF2002G is usually 5 days.

3.What payment methods are accepted for SFAF2002G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SFAF2002G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SFAF2002G?

SFAF2002G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SFAF2002G 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 SFAF2002G?

For technical support, including SFAF2002G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SFAF2002G requirements.

6.How does Aetrix verify that SFAF2002G is sourced from the original manufacturer or authorized distributors?

All SFAF2002G 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 SFAF2002G meets industry standards.

7.What is the process for return or replacement of SFAF2002G?

All SFAF2002G units undergo pre-shipment inspection (PSI). If there is an issue with SFAF2002G, 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 SFAF2002G part is unused and in its original packaging.

Return procedure for SFAF2002G:

1.Submit a request within 90 days.

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

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