Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Taiwan Semiconductor Corporation SF66G A0G

Name: SF66G A0G
Brand: Taiwan Semiconductor Corporation
SKU: SF66G A0G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: SF66G A0G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-201AD, Axial

Datasheet:: SF66G A0G.pdf

Description:: DIODE GEN PURP 400V 6A DO201AD

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:6,427

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

SF66G A0G from Taiwan Semiconductor is a 400V, 6A super fast recovery rectifier diode in DO-201AD package, featuring 35ns reverse recovery time, 1.300V forward voltage at 6A/25°C, and 150A surge current capability; used in switching-mode DC-DC converters and freewheeling paths where low conduction loss and fast switching are required.

For engineers reviewing the SF66G A0G datasheet, SF66G A0G pinout, SF66G A0G application, or SF66G A0G equivalent, key selection criteria include V_RRM = 400V, I_F = 6A, t_rr = 35ns, V_F = 1.300V, and thermal resistance R_θJL = 5°C/W - all critical for high-efficiency power stage design in industrial and automotive-grade SMPS.

Technical Context

The SF66G A0G implements a single-die silicon PN junction structure optimized for super-fast recovery (t_rr ≤ 35ns), enabling operation in high-frequency switching topologies up to several hundred kHz. Its low Q_rr and controlled soft-recovery behavior reduce EMI and switching losses compared to standard fast rectifiers.

Designed for surface-mount-compatible through-hole assembly, the DO-201AD package provides robust thermal performance with R_θJL = 5°C/W and supports lead-free soldering per J-STD-002; polarity is marked by a cathode band, and the device meets JESD201 Class 2 whisker resistance.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	400 V - maximum repetitive reverse blocking voltage; defines safe operating range in flyback/freewheeling clamp circuits
I_F	6 A - continuous average forward current; sets thermal design baseline for heatsinking and PCB copper area
t_rr	35 ns - reverse recovery time at I_F = 0.5A, I_R = 1.0A, I_rr = 0.25A; enables efficient operation in 200–500 kHz SMPS
V_F	1.300 V @ 6A, 25°C - forward voltage drop; directly determines conduction loss (P_cond ≈ 7.8W at full load)
C_J	50 pF @ 1MHz, V_R = 4V - junction capacitance; impacts snubber sizing and high-frequency turn-off ringing
R_θJL	5 °C/W - junction-to-lead thermal resistance; enables direct thermal coupling to copper pour or heatsink via lead frame
I_FSM	150 A @ 8.3ms half-sine - non-repetitive surge rating; supports inrush and fault-current handling in converter startup

Pinout & Package

DO-201AD package: axial-leaded, molded epoxy case with cathode band marking; leads are pure tin-plated, RoHS-compliant, and halogen-free per IEC 61249-2-21.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential node (e.g., switch node in buck freewheel path); requires low-inductance routing
Cathode	Forward current exit / reverse blocking terminal	Marked by band; ties to output rail or ground return; carries full load current and must handle peak reverse voltage

Key Features

Feature	Design Value
Super-fast recovery (t_rr ≤ 35ns)	Reduces switching loss and EMI in high-frequency DC-DC converters without requiring active clamping
Low forward voltage (V_F = 1.300V @ 6A)	Lowers conduction loss by ~15% vs. comparable 400V rectifiers with V_F > 1.45V, improving efficiency at mid-load
High surge rating (I_FSM = 150A)	Withstands repeated inrush events in industrial power supplies without degradation or bond-wire fusing
DO-201AD mechanical robustness	UL 94V-0 rated molding compound and JESD201 Class 2 whisker resistance ensure long-term reliability in vibration-prone environments
AEC-Q101 qualification option (SF66GH)	Enables drop-in use in automotive under-hood applications when specified with 'H' suffix; SF66G A0G itself is not AEC-Q101 qualified

Applications

DC-DC Buck Converter Freewheeling	AC-DC Secondary Rectification
Use Scenario: Freewheeling path in 12V–48V input buck converters delivering up to 36W continuous output. IC Role / Device Role / Timing Role: Uncontrolled rectifier conducting during low-side switch off-time; recovers before next switching cycle. Use Value: 35ns t_rr minimizes reverse recovery charge (Q_rr) and associated switching loss, increasing efficiency by 0.8–1.2% at 300kHz.	Use Scenario: Output rectification in 24V/3A offline AC-DC adapters with universal input (85–265VAC). IC Role / Device Role / Timing Role: Secondary-side unidirectional current path; blocks reverse voltage during transformer reset phase. Use Value: 400V V_RRM provides 2× safety margin over reflected 200V peak, while 1.300V V_F reduces thermal stress on PCB copper.
Motor Drive Flyback Clamp	Industrial PLC Power Supply Input Stage
Use Scenario: Snubberless flyback clamp across brushed DC motor H-bridge outputs during PWM commutation. IC Role / Device Role / Timing Role: Fast-recovery path for inductive kickback energy; conducts only during brief voltage reversal. Use Value: 150A I_FSM handles 10× rated current surges from motor inductance, preventing avalanche failure during stall conditions.	Use Scenario: Input rectification in DIN-rail mounted 24V/10A industrial PLC power supplies with wide ambient range (−40°C to +85°C). IC Role / Device Role / Timing Role: Primary rectifier converting bridge output to bulk DC; operates continuously at 6A average current. Use Value: R_θJL = 5°C/W allows direct thermal transfer to chassis-mounted heatsink, maintaining T_J < 125°C without forced air.

DC-DC Buck Converter Freewheeling

AC-DC Secondary Rectification

Use Scenario: Freewheeling path in 12V–48V input buck converters delivering up to 36W continuous output.

IC Role / Device Role / Timing Role: Uncontrolled rectifier conducting during low-side switch off-time; recovers before next switching cycle.

Use Value: 35ns t_rr minimizes reverse recovery charge (Q_rr) and associated switching loss, increasing efficiency by 0.8–1.2% at 300kHz.

Use Scenario: Output rectification in 24V/3A offline AC-DC adapters with universal input (85–265VAC).

IC Role / Device Role / Timing Role: Secondary-side unidirectional current path; blocks reverse voltage during transformer reset phase.

Use Value: 400V V_RRM provides 2× safety margin over reflected 200V peak, while 1.300V V_F reduces thermal stress on PCB copper.

Motor Drive Flyback Clamp

Industrial PLC Power Supply Input Stage

Use Scenario: Snubberless flyback clamp across brushed DC motor H-bridge outputs during PWM commutation.

IC Role / Device Role / Timing Role: Fast-recovery path for inductive kickback energy; conducts only during brief voltage reversal.

Use Value: 150A I_FSM handles 10× rated current surges from motor inductance, preventing avalanche failure during stall conditions.

Use Scenario: Input rectification in DIN-rail mounted 24V/10A industrial PLC power supplies with wide ambient range (−40°C to +85°C).

IC Role / Device Role / Timing Role: Primary rectifier converting bridge output to bulk DC; operates continuously at 6A average current.

Use Value: R_θJL = 5°C/W allows direct thermal transfer to chassis-mounted heatsink, maintaining T_J < 125°C without forced air.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Vishay VS-6EWH04-M3/45	Same V_RRM (400V), I_F (6A), t_rr (35ns), but TO-220AC package with isolated tab	Requires mounting hardware and thermal interface; unsuitable for space-constrained DO-201AD footprints	Select when chassis-level heatsinking is mandatory and board real estate permits larger footprint
ON Semiconductor MUR640CT	Dual common-cathode configuration, 400V/6A per diode, t_rr = 35ns, but D²PAK package	Offers dual-diode integration but incompatible pinout and thermal profile; not a drop-in replacement	Choose only if redesigning for dual-output or synchronous rectification support

Compared with VS-6EWH04-M3/45 and MUR640CT, SF66G A0G delivers identical electrical performance in a compact, low-cost DO-201AD package optimized for manual or wave-solder assembly - ideal for cost-sensitive industrial power supplies where thermal management is handled via PCB copper rather than external heatsinks.

Availability

SF66G A0G is available at Aetrix Electronics and suitable for DC-DC converters, switching-mode inverters, and freewheeling applications requiring stable component supply, consistent parametric performance, and long-term industrial lifecycle support.

Supply support for SF66G A0G 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 for industrial and automotive markets.

The SF6xG series was developed to deliver high-reliability, super-fast recovery rectification in standard through-hole packages, targeting cost-optimized yet thermally robust power conversion stages in industrial automation and renewable energy systems.

FAQ

What is the maximum junction temperature rating for SF66G A0G?

The SF66G A0G has a maximum junction temperature (T_J) of +150°C, with a storage temperature range of −55°C to +150°C. This rating allows reliable operation in high-ambient industrial environments when derated per the forward current derating curve in the datasheet. Thermal design must ensure actual T_J stays below this limit under worst-case load and ambient conditions. The SF66G A0G's R_θJL = 5°C/W supports effective heat transfer to PCB copper or external heatsinks.

Is SF66G A0G AEC-Q101 qualified?

No, SF66G A0G is not AEC-Q101 qualified. The AEC-Q101 qualified version is designated SF66GH (with 'H' suffix), which undergoes additional stress testing for automotive under-hood applications. SF66G A0G meets industrial reliability standards including JESD201 Class 2 whisker resistance and RoHS/halogen-free compliance, but it lacks the full AEC-Q101 qualification documentation and test reports required for automotive use. Always specify SF66GH for AEC-Q101–compliant designs.

What does the 'A0G' suffix mean in SF66G A0G?

The 'A0G' suffix in SF66G A0G indicates packaging format: 'A0' denotes 500-piece ammo box packaging, and 'G' signifies green (halogen-free) molding compound compliant with IEC 61249-2-21. This differs from the standard 'SF66G' (1,250 pcs tape-and-reel) and 'SF66GH' (AEC-Q101 qualified, tape-and-reel). The 'A0G' variant retains identical electrical and thermal specifications as SF66G, with no performance trade-offs - only packaging and environmental compliance differences.

How does SF66G A0G compare to SF65G in forward voltage?

SF66G A0G and SF65G share identical forward voltage specification: V_F = 1.300V max at I_F = 6A and T_J = 25°C. Both belong to the same 300–600V subgroup (SF65G–SF68G) with matched process tuning for consistent V_F and t_rr performance. The primary distinction is V_RRM: SF65G is rated at 300V, while SF66G A0G is rated at 400V - making SF66G A0G suitable for higher-voltage bus applications without sacrificing conduction efficiency.

Can SF66G A0G replace SF64G in an existing design?

SF66G A0G can replace SF64G only if the circuit's peak reverse voltage does not exceed 400V - since SF64G is rated for 200V V_RRM and SF66G A0G for 400V. Electrically, both share identical I_F = 6A, t_rr = 35ns, and DO-201AD package, so layout and thermal design remain valid. However, V_F increases slightly (SF64G: 0.975V max; SF66G A0G: 1.300V max), raising conduction loss by ~0.325W at 6A - verify thermal margin and efficiency impact before substitution. The SF66G A0G remains a direct physical and functional replacement where voltage headroom justifies the trade-off.

SF66G A0G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-201AD, Axial

Packaging:: Cut Tape (CT)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 400 V

Current - Average Rectified (Io):: 6A

Voltage - Forward (Vf) (Max) @ If:: 1.3 V @ 6 A

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

Reverse Recovery Time (trr):: 35 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 400 V

Capacitance @ Vr, F:: 50pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-201AD

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

SF66G A0G FAQ

1.How can I place an order for SF66G A0G through Aetrix?

Please submit a Request for Quotation (RFQ) for SF66G A0G 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 SF66G A0G reliable?

The price and inventory of SF66G A0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF66G A0G is usually 5 days.

3.What payment methods are accepted for SF66G A0G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF66G A0G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SF66G A0G?

SF66G A0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SF66G A0G 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 SF66G A0G?

For technical support, including SF66G A0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF66G A0G requirements.

6.How does Aetrix verify that SF66G A0G is sourced from the original manufacturer or authorized distributors?

All SF66G A0G 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 SF66G A0G meets industry standards.

7.What is the process for return or replacement of SF66G A0G?

All SF66G A0G units undergo pre-shipment inspection (PSI). If there is an issue with SF66G A0G, 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 SF66G A0G part is unused and in its original packaging.

Return procedure for SF66G A0G:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-10 Schmitt Trigger Explained: Hysteresis, Circuits, Inverters and Applications

Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…