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

Taiwan Semiconductor Corporation SFAS803GH

Name: SFAS803GH
Brand: Taiwan Semiconductor Corporation
SKU: SFAS803GH
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SFAS803GH

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

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

Datasheet:: SFAS803GH.pdf

Description:: 35NS, 8A, 150V, SUPER FAST RECOV

Quantity:: RFQ Add To RFQ list

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Product details

Overview

SFAS803GH from Taiwan Semiconductor is an AEC-Q101-qualified super fast surface-mount rectifier in TO-263AB (D2PAK) package, rated for 150 V repetitive peak reverse voltage (V_RRM), 8 A average forward current (I_F), and 125 A non-repetitive surge current (I_FSM). It delivers low forward voltage (0.95 V at 8 A, 25°C) and ultra-fast reverse recovery (35 ns), making it suitable for automotive DC-DC converters and freewheeling circuits.

For engineers reviewing the SFAS803GH datasheet, SFAS803GH pinout, SFAS803GH application, or SFAS803GH equivalent, key selection criteria include its 150 V V_RRM, 35 ns trr, AEC-Q101 qualification, TO-263AB thermal performance (R_θJC = 2.2°C/W), and 0.95 V V_F at full load - all critical for high-efficiency, high-reliability automotive power conversion designs.

Technical Context

The SFAS803GH is a single-die, glass-passivated silicon rectifier optimized for high-speed switching with minimal reverse recovery charge. Its 150 V V_RRM and 35 ns trr enable efficient operation in snubber and freewheeling roles where rapid turn-off reduces switching losses.

Thermally, it leverages the TO-263AB (D2PAK) package's low junction-to-case resistance (2.2°C/W) to sustain 8 A continuous conduction at up to 150°C junction temperature, while moisture sensitivity level 1 ensures compatibility with standard SMT reflow processes without baking.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	150 V - Maximum reverse blocking voltage before breakdown; defines safe operating range in 12–48 V automotive systems.
I_F	8 A - Continuous average forward current at T_C = 110°C; supports high-power DC-DC stages without forced cooling.
I_FSM	125 A - Peak non-repetitive surge current (8.3 ms half-sine); handles inrush and fault transients in automotive lighting drivers.
V_F	0.95 V @ 8 A, 25°C - Low conduction loss improves system efficiency and reduces thermal stress in compact layouts.
t_rr	35 ns - Ultra-fast reverse recovery minimizes switching loss and EMI in high-frequency (>100 kHz) converters.
R_θJC	2.2°C/W - Enables direct heatsinking to PCB copper or external metal; supports >5 W dissipation with modest thermal design.
Junction Temp	−55°C to +150°C - Wide operating range meets under-hood automotive requirements per AEC-Q101.

Pinout & Package

TO-263AB (D2PAK) package with three terminals: Anode (pin 1), Cathode (pin 2), and exposed thermal pad (pin 3, electrically connected to cathode). Molding compound meets UL 94V-0; matte tin-plated leads comply with J-STD-002 solderability.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to input/high-side node; must withstand 150 V reverse bias when off.
Cathode	Forward current exit point	Common return path; electrically tied to exposed thermal pad for low-inductance, low-resistance heat transfer.
Exposed Pad	Thermal & electrical cathode extension	Requires minimum 100 mm² copper pour on PCB layer for effective heat dissipation and mechanical anchoring.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for under-hood deployment.
Glass passivated junction	Eliminates risk of junction corrosion and leakage drift in humid or chemically aggressive environments (e.g., engine bay).
Low V_F (0.95 V)	Reduces conduction loss by ~15% vs. standard fast rectifiers at 8 A, directly improving converter efficiency and thermal margin.
35 ns t_rr	Enables clean turn-off in 200–500 kHz DC-DC topologies, reducing diode-induced ringing and gate driver stress.
Moisture Sensitivity Level 1	Allows standard SMT assembly without dry-pack or baking - lowers manufacturing cost and avoids moisture-related popcorning.

Applications

Automotive DC-DC Converters	LED Headlamp Drivers
Use Scenario: Step-down conversion from 12 V or 48 V battery to regulated 5–24 V for control modules and sensors. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous or asynchronous buck converters operating at 200–300 kHz. Use Value: 35 ns t_rr and 0.95 V V_F minimize switching loss and conduction loss, enabling >94% efficiency at full load.	Use Scenario: Constant-current LED driver for adaptive front lighting systems (AFS) with PWM dimming. IC Role / Device Role / Timing Role: Snubber diode across MOSFET switch to clamp inductive kickback during PWM off-time. Use Value: 125 A I_FSM safely absorbs transient energy; 150 V V_RRM accommodates 48 V system transients up to ±100 V.
Start-Stop System Power Supplies	On-Board Charger Auxiliary Supplies
Use Scenario: Input rectification and hold-up in 12 V auxiliary supplies powering MCU, CAN transceivers, and sensors during engine cranking. IC Role / Device Role / Timing Role: Primary output rectifier in flyback or forward converter supplying 3.3 V/5 V rails. Use Value: −55°C to +150°C operating range ensures functionality during cold cranking (−40°C ambient) and hot soak (+125°C case temp).	Use Scenario: Isolated auxiliary supply in EV on-board chargers converting 400 V DC bus to 12 V for control logic and fans. IC Role / Device Role / Timing Role: Secondary-side rectifier in resonant LLC or phase-shifted full-bridge converters. Use Value: TO-263AB package with R_θJC = 2.2°C/W enables 8 A output without heatsink, simplifying mechanical integration.

Automotive DC-DC Converters

LED Headlamp Drivers

Use Scenario: Step-down conversion from 12 V or 48 V battery to regulated 5–24 V for control modules and sensors.

IC Role / Device Role / Timing Role: Freewheeling diode in synchronous or asynchronous buck converters operating at 200–300 kHz.

Use Value: 35 ns t_rr and 0.95 V V_F minimize switching loss and conduction loss, enabling >94% efficiency at full load.

Use Scenario: Constant-current LED driver for adaptive front lighting systems (AFS) with PWM dimming.

IC Role / Device Role / Timing Role: Snubber diode across MOSFET switch to clamp inductive kickback during PWM off-time.

Use Value: 125 A I_FSM safely absorbs transient energy; 150 V V_RRM accommodates 48 V system transients up to ±100 V.

Start-Stop System Power Supplies

On-Board Charger Auxiliary Supplies

Use Scenario: Input rectification and hold-up in 12 V auxiliary supplies powering MCU, CAN transceivers, and sensors during engine cranking.

IC Role / Device Role / Timing Role: Primary output rectifier in flyback or forward converter supplying 3.3 V/5 V rails.

Use Value: −55°C to +150°C operating range ensures functionality during cold cranking (−40°C ambient) and hot soak (+125°C case temp).

Use Scenario: Isolated auxiliary supply in EV on-board chargers converting 400 V DC bus to 12 V for control logic and fans.

IC Role / Device Role / Timing Role: Secondary-side rectifier in resonant LLC or phase-shifted full-bridge converters.

Use Value: TO-263AB package with R_θJC = 2.2°C/W enables 8 A output without heatsink, simplifying mechanical integration.

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-8EWH015	Same V_RRM (150 V), same I_F (8 A), but higher V_F (1.05 V typ.) and slower t_rr (50 ns).	Marginally lower efficiency and higher EMI in >300 kHz designs; acceptable for <200 kHz automotive supplies.	Select if legacy qualification or dual-sourcing is required; verify thermal derating due to higher V_F.
ON Semiconductor MUR815	Same V_RRM and I_F, but TO-220 package (higher R_θJC = 3.0°C/W) and no AEC-Q101 certification.	Not qualified for automotive use; requires heatsink for 8 A operation; unsuitable for space-constrained SMT layouts.	Use only in industrial or consumer applications where AEC-Q101 and SMT placement are not required.

Compared with VS-8EWH015 and MUR815, the SFAS803GH offers superior high-frequency performance (35 ns vs. ≥50 ns), lower conduction loss (0.95 V vs. ≥1.05 V), and automotive qualification - making it the preferred choice for next-generation 48 V automotive power systems requiring compact, efficient, and certified rectification.

Availability

SFAS803GH is available at Aetrix Electronics and suitable for automotive DC-DC converters, LED headlamp drivers, and start-stop system power supplies requiring stable component supply, AEC-Q101 compliance, and high-reliability surface-mount rectification.

Supply support for SFAS803GH 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 devices, rectifiers, and protection components.

The SFAS803GH belongs to TSC's AEC-Q101-qualified Super Fast Rectifier family, designed specifically for high-efficiency, high-reliability automotive power conversion where low V_F, fast t_rr, and robust thermal performance are mandatory.

FAQ

What is the maximum junction temperature rating for the SFAS803GH?

The SFAS803GH has a maximum junction temperature (T_J) of +150°C, verified per AEC-Q101 stress testing. This rating allows reliable operation in under-hood automotive environments where case temperatures may reach 110–125°C. Derating curves confirm 8 A continuous current is sustainable at T_C = 110°C, provided the PCB thermal pad area meets recommended layout guidelines. The SFAS803GH maintains specified electrical parameters within this full temperature range.

Is the SFAS803GH pin-compatible with other parts in the SFAS80xGH series?

Yes, all SFAS801GH through SFAS808GH share identical TO-263AB (D2PAK) package dimensions, pinout (anode/cathode/exposed pad), and thermal pad layout. The only differences are V_RRM ratings (50–600 V) and corresponding forward voltage and capacitance values. This uniformity enables single PCB design reuse across multiple voltage grades - for example, using SFAS803GH (150 V) in 12 V systems and SFAS806GH (400 V) in 48 V systems without layout changes.

Does the SFAS803GH require special handling during PCB assembly?

No - the SFAS803GH is rated Moisture Sensitivity Level 1 per J-STD-020, meaning it can be processed using standard SMT reflow profiles (including lead-free) without pre-baking or dry-packing. Its matte tin-plated leads meet J-STD-002 solderability requirements, and the UL 94V-0 molding compound withstands peak reflow temperatures up to 260°C. No special handling beyond standard ESD precautions is needed for the SFAS803GH.

What is the reverse recovery time (t_rr) test condition for the SFAS803GH?

The SFAS803GH reverse recovery time is measured at I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A, per the manufacturer's test circuit shown in Figure 6 of the datasheet. Under these conditions, t_rr is guaranteed ≤35 ns. This value reflects real-world switching behavior in buck and flyback converters where the SFAS803GH operates as a freewheeling or snubber diode, directly impacting switching loss and EMI profile.

Can the SFAS803GH replace standard FR-type rectifiers in existing designs?

Yes - the SFAS803GH can directly replace standard fast recovery rectifiers (e.g., FFPF08U150, STTH8R06) in TO-263AB footprint designs, offering measurable improvements: 35 ns t_rr vs. 50–100 ns, 0.95 V V_F vs. 1.1–1.3 V, and AEC-Q101 qualification. However, verify layout thermal relief and snubber network tuning, as faster recovery may increase voltage overshoot if parasitic inductance is unmitigated. The SFAS803GH delivers tangible gains in efficiency and reliability where those parameters matter.

SFAS803GH 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):: 150 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 @ 150 V

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

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

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

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

SFAS803GH FAQ

1.How can I place an order for SFAS803GH through Aetrix?

Please submit a Request for Quotation (RFQ) for SFAS803GH 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 SFAS803GH reliable?

The price and inventory of SFAS803GH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SFAS803GH is usually 5 days.

3.What payment methods are accepted for SFAS803GH?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SFAS803GH transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SFAS803GH?

SFAS803GH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SFAS803GH 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 SFAS803GH?

For technical support, including SFAS803GH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SFAS803GH requirements.

6.How does Aetrix verify that SFAS803GH is sourced from the original manufacturer or authorized distributors?

All SFAS803GH 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 SFAS803GH meets industry standards.

7.What is the process for return or replacement of SFAS803GH?

All SFAS803GH units undergo pre-shipment inspection (PSI). If there is an issue with SFAS803GH, 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 SFAS803GH part is unused and in its original packaging.

Return procedure for SFAS803GH:

1.Submit a request within 90 days.

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

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