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 SFAS804G

Name: SFAS804G
Brand: Taiwan Semiconductor Corporation
SKU: SFAS804G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: SFAS804G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Datasheet:: SFAS804G.pdf

Description:: DIODE GEN PURP 200V 8A TO263AB

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:1,600

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

Product details

Overview

SFAS804G from Taiwan Semiconductor is an 8A, 200V super fast surface-mount rectifier in TO-263AB (D2PAK) package, featuring 0.95V forward voltage at 8A/25°C, 35ns reverse recovery time, and 2.2°C/W junction-to-case thermal resistance. It serves as a freewheeling or output rectifier in high-frequency switching power supplies.

For engineers reviewing the SFAS804G datasheet, SFAS804G pinout, SFAS804G application, or SFAS804G equivalent, key selection criteria include V_RRM = 200V, I_F = 8A continuous, low VF for efficiency, fast trr for reduced switching loss, and D2PAK thermal performance in DC-DC and SMPS designs.

Technical Context

This single-die silicon rectifier uses glass-passivated junction technology to achieve stable reverse blocking and low leakage (<10 µA @ 25°C). Its 35ns trr and 80 pF junction capacitance support operation up to several hundred kHz in hard-switched topologies.

The device operates across -55°C to +150°C junction temperature range with 125A non-repetitive surge capability (8.3ms sine), enabling robustness in transient-prone converter outputs and freewheeling paths where rapid diode turn-off minimizes voltage spikes.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	200 V - Maximum repetitive reverse voltage; defines safe operating limit in flyback/clamp circuits
I_F	8 A - Continuous forward current rating at T_C = 110°C; determines heatsink sizing in conduction-limited designs
V_F	0.95 V @ 8A, 25°C - Low conduction loss improves efficiency in high-current output stages
t_rr	35 ns - Fast recovery reduces switching losses and EMI in >100 kHz SMPS
R_θJC	2.2 °C/W - Enables direct heatsinking via tab; supports >6W dissipation with modest thermal interface
C_J	80 pF @ 1 MHz, 4V - Limits capacitive coupling in high-dv/dt environments like synchronous rectifier gate drive zones
I_FSM	125 A - Withstands inrush and fault currents without bond-wire fusing

Pinout & Package

TO-263AB (D2PAK) package with exposed cathode tab (pin 2), anode lead (pin 1), and isolated mounting tab electrically connected to cathode. Moisture sensitivity level 1 per J-STD-020; matte tin-plated leads compliant with J-STD-002 solderability.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Anode)	Forward current input	Connected to switching node or transformer secondary; must withstand peak reverse voltage during off-state
Pin 2 (Cathode / Tab)	Forward current output & thermal path	Electrically tied to heatsink; requires isolation if heatsink is grounded; dominates thermal resistance budget

Key Features

Feature	Design Value
Glass passivated junction	Ensures long-term reliability under humidity and thermal cycling; eliminates need for conformal coating in industrial environments
Low V_F (0.95 V)	Reduces conduction loss by ~15% vs. standard fast rectifiers at 8A, directly improving 12V/24V output efficiency
35 ns t_rr	Minimizes reverse recovery charge (Q_rr ≈ 17.5 nC), lowering EMI and stress on MOSFETs in bridge configurations
D2PAK thermal performance	Enables PCB-mounted heatsinking without bolt-down hardware-ideal for space-constrained telecom and server PSUs
Halogen-free & RoHS	Meets IPC-1752A material declaration requirements for automotive and medical-adjacent industrial systems

Applications

DC-DC Converter Output Rectification	Switching Mode Inverter Freewheeling
Use Scenario: Secondary-side rectification in isolated 48V–12V buck-derived converters delivering up to 96W continuous. IC Role / Device Role / Timing Role: Unidirectional current valve conducting during MOSFET off-time; blocks reverse voltage during on-time. Use Value: 0.95V V_F limits conduction loss to <7.6W at 8A, while 35ns t_rr prevents cross-conduction in synchronous designs.	Use Scenario: Freewheeling path across inductive loads (e.g., motor windings or solenoids) in half-bridge inverters. IC Role / Device Role / Timing Role: Provides low-impedance return path when main switch turns off; clamps inductive kickback. Use Value: 125A I_FSM handles motor stall surges; 200V V_RRM accommodates 150V bus with 30% margin.
AC-DC Adapter Secondary Side	Industrial Power Supply Hold-up Rectification
Use Scenario: Output rectification in compact 65W laptop adapters using quasi-resonant flyback topology. IC Role / Device Role / Timing Role: Conducts during transformer demagnetization phase; blocks reflected primary voltage. Use Value: D2PAK footprint allows direct thermal coupling to metal housing; 80pF C_J avoids noise coupling into feedback circuitry.	Use Scenario: Input-stage rectification feeding bulk capacitor in 24V industrial PLC power modules with 20ms hold-up requirement. IC Role / Device Role / Timing Role: Handles line-frequency rectified input plus high-frequency ripple from upstream PFC stage. Use Value: 150°C T_JMAX and -55°C T_STG support wide ambient operation; moisture level 1 enables reflow without baking.

DC-DC Converter Output Rectification

Switching Mode Inverter Freewheeling

Use Scenario: Secondary-side rectification in isolated 48V–12V buck-derived converters delivering up to 96W continuous.

IC Role / Device Role / Timing Role: Unidirectional current valve conducting during MOSFET off-time; blocks reverse voltage during on-time.

Use Value: 0.95V V_F limits conduction loss to <7.6W at 8A, while 35ns t_rr prevents cross-conduction in synchronous designs.

Use Scenario: Freewheeling path across inductive loads (e.g., motor windings or solenoids) in half-bridge inverters.

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

Use Value: 125A I_FSM handles motor stall surges; 200V V_RRM accommodates 150V bus with 30% margin.

AC-DC Adapter Secondary Side

Industrial Power Supply Hold-up Rectification

Use Scenario: Output rectification in compact 65W laptop adapters using quasi-resonant flyback topology.

IC Role / Device Role / Timing Role: Conducts during transformer demagnetization phase; blocks reflected primary voltage.

Use Value: D2PAK footprint allows direct thermal coupling to metal housing; 80pF C_J avoids noise coupling into feedback circuitry.

Use Scenario: Input-stage rectification feeding bulk capacitor in 24V industrial PLC power modules with 20ms hold-up requirement.

IC Role / Device Role / Timing Role: Handles line-frequency rectified input plus high-frequency ripple from upstream PFC stage.

Use Value: 150°C T_JMAX and -55°C T_STG support wide ambient operation; moisture level 1 enables reflow without baking.

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-8EWH02FN-M3/45	V_RRM = 200V, I_F = 8A, t_rr = 30ns, VF = 0.92V @ 8A - slightly faster but same package and thermal R_θJC	Optimized for ultra-low-noise audio PSUs due to lower Q_rr; identical mounting and layout compatibility	Select when minimizing EMI in sensitive analog subsystems is critical
ON Semiconductor MUR820G	V_RRM = 200V, I_F = 8A, t_rr = 75ns, VF = 0.97V @ 8A - slower recovery, higher VF, same TO-263AB footprint	Better suited for <100kHz applications where cost is prioritized over switching loss	Choose for legacy designs where trr >50ns is acceptable and supply chain diversification is needed

Compared with VS-8EWH02FN-M3/45 and MUR820G, the SFAS804G delivers best-in-class balance of low VF (0.95V), fast trr (35ns), and industry-standard D2PAK thermal performance-making it optimal for new 100–300 kHz SMPS designs requiring efficiency and compact thermal management.

Availability

SFAS804G is available at Aetrix Electronics and suitable for DC-DC converters, switching mode inverters, and industrial power supplies requiring stable component supply, consistent parametric performance, and long-term manufacturability.

Supply support for SFAS804G 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 computing markets.

The SFAS804G belongs to TSC's SFAS super fast rectifier family, engineered specifically for high-efficiency, high-frequency switching power conversion where low forward drop and rapid recovery are essential to minimize system-level losses.

FAQ

What is the maximum junction temperature rating for SFAS804G?

The SFAS804G has a maximum junction temperature (T_J) of +150°C and a storage temperature range of -55°C to +150°C. This rating allows reliable operation in enclosed industrial enclosures or near heat-generating components when mounted on a properly sized heatsink with thermal interface material.

Does SFAS804G have a halogen-free and RoHS-compliant construction?

Yes, the SFAS804G is halogen-free per IEC 61249-2-21 and RoHS compliant. Its molding compound meets UL 94V-0 flammability rating, and its matte tin-plated leads satisfy J-STD-002 solderability requirements-ensuring compliance with environmental directives for industrial and telecom equipment.

What is the reverse recovery time (t_rr) specification for SFAS804G, and under what test conditions?

The SFAS804G has a typical reverse recovery time (t_rr) of 35 ns, measured at I_F = 0.5 A, I_R = 1.0 A, and I_RR = 0.25 A. This value is confirmed in the official TSC datasheet Version N2103 and reflects performance under standardized double-pulse test conditions relevant to hard-switched SMPS topologies.

Can SFAS804G be used as a direct replacement for SFAS803G or SFAS805G in existing designs?

No-SFAS804G is rated for 200V V_RRM, whereas SFAS803G is 150V and SFAS805G is 300V. Substituting across this family requires verification of reverse voltage margin in the target circuit. The pinout and thermal characteristics are identical, but electrical stress limits differ per part number.

What is the junction-to-case thermal resistance (R_θJC) of SFAS804G, and how does it impact heatsink design?

The SFAS804G has a typical junction-to-case thermal resistance (R_θJC) of 2.2°C/W. When dissipating 6W (e.g., at 8A and 0.75V drop), this results in ~13.2°C temperature rise from case to junction-meaning heatsink selection must account for additional R_θCA to maintain T_J ≤150°C under worst-case ambient conditions.

SFAS804G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 200 V

Current - Average Rectified (Io):: 8A

Voltage - Forward (Vf) (Max) @ If:: 950 mV @ 8 A

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

Reverse Recovery Time (trr):: 35 ns

Current - Reverse Leakage @ Vr:: 10 µA @ 200 V

Capacitance @ Vr, F:: 80pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-263AB (D2PAK)

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

SFAS804G FAQ

1.How can I place an order for SFAS804G through Aetrix?

Please submit a Request for Quotation (RFQ) for SFAS804G 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 SFAS804G reliable?

The price and inventory of SFAS804G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SFAS804G is usually 5 days.

3.What payment methods are accepted for SFAS804G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SFAS804G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SFAS804G?

SFAS804G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SFAS804G 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 SFAS804G?

For technical support, including SFAS804G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SFAS804G requirements.

6.How does Aetrix verify that SFAS804G is sourced from the original manufacturer or authorized distributors?

All SFAS804G 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 SFAS804G meets industry standards.

7.What is the process for return or replacement of SFAS804G?

All SFAS804G units undergo pre-shipment inspection (PSI). If there is an issue with SFAS804G, 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 SFAS804G part is unused and in its original packaging.

Return procedure for SFAS804G:

1.Submit a request within 90 days.

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

Tech Hub

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…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…