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

Taiwan Semiconductor Corporation SF44GH

Name: SF44GH
Brand: Taiwan Semiconductor Corporation
SKU: SF44GH
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SF44GH

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-201AD, Axial

Datasheet:: SF44GH.pdf

Description:: DIODE GEN PURP 200V 4A DO201AD

Quantity:: RFQ Add To RFQ list

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Inventory:2,500

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Product details

Overview

SF44GH from Taiwan Semiconductor is a 200V, 4A super fast recovery rectifier diode in DO-201AD package, featuring 35ns reverse recovery time, 1.0V forward voltage at 4A/25°C, and AEC-Q101 qualification for automotive-grade reliability in high-frequency switching power supplies.

For engineers reviewing the SF44GH datasheet, SF44GH pinout, SF44GH application, or SF44GH equivalent, key selection criteria include V_RRM = 200V, I_F = 4A, t_rr = 35ns, V_F = 1.0V (typ), and AEC-Q101 qualification-critical for DC-DC converters, freewheeling paths, and automotive SMPS designs requiring low loss and fast switching.

Technical Context

This single-die silicon rectifier operates with a maximum junction temperature of 150°C and junction-to-ambient thermal resistance of 25°C/W. Its super fast recovery (t_rr ≤ 35ns) enables efficient operation in switching frequencies up to several hundred kHz.

The device sustains repetitive peak reverse voltage of 200V and withstands non-repetitive surge current up to 125A (8.3ms half-sine). Reverse leakage remains ≤5µA at 25°C and ≤500µA at 125°C under rated V_R, supporting stable performance across automotive ambient conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	200 V - Maximum repetitive reverse blocking voltage; defines safe operating range in DC-DC flyback or boost stages
I_F	4 A - Continuous forward current rating; supports medium-power converter output rectification
t_rr	35 ns - Reverse recovery time; enables high-frequency switching with minimal switching loss and EMI
V_F	1.0 V (typ @ 4A, 25°C) - Low forward voltage drop; reduces conduction loss and thermal stress
I_FSM	125 A - Peak surge current capability; handles inrush and transient overloads without failure
Junction temp	–55°C to +150°C - Wide operating temperature range; suitable for under-hood automotive environments
AEC-Q101	Qualified - Meets stress test requirements for automotive electronics per JESD22-A108 and JESD22-A110

Pinout & Package

DO-201AD axial-leaded package with cathode band marking; leads are pure tin plated, solderable per J-STD-002, and pass JESD201 Class 2 whisker testing.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry	Connected to lower-potential side (e.g., switch node in flyback secondary or ground return path)
Cathode	Forward current exit / reverse blocking terminal	Marked by band; connects to output rail or positive bus; blocks 200V reverse during off-state

Key Features

Feature	Design Value
Super fast recovery	t_rr ≤ 35ns - Minimizes switching loss and improves efficiency in 100–500 kHz SMPS topologies
AEC-Q101 qualification	Validated for automotive use - Ensures reliability in engine control units, ADAS power supplies, and body electronics
Low V_F at rated current	1.0V typ @ 4A - Reduces power dissipation by ~15% vs. standard fast rectifiers with V_F ≥ 1.15V
High surge robustness	I_FSM = 125A - Survives repeated cold-crank and load-dump transients without degradation
Halogen-free & RoHS	Complies with IEC 61249-2-21 - Supports environmentally compliant manufacturing and end-of-life recycling

Applications

Automotive DC-DC Converters	Industrial Switch-Mode Power Supplies
Use Scenario: 12V-to-5V/3.3V buck converter in vehicle infotainment head unit with 200kHz switching frequency. IC Role / Device Role / Timing Role: Output rectifier handling continuous 4A load with fast turn-off to minimize reverse recovery loss. Use Value: 35ns t_rr and 1.0V V_F reduce total power loss by >0.4W vs. standard FR107, lowering thermal design burden.	Use Scenario: Secondary-side rectification in 48V-input telecom power module delivering 24V@3A. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous rectified forward converter, clamping inductive kick during MOSFET off-time. Use Value: 200V V_RRM provides 2× safety margin over 48V bus transients; 125A I_FSM absorbs startup surges.
LED Driver Power Stages	UPS & Inverter Auxiliary Supplies
Use Scenario: Constant-current LED driver for commercial lighting using quasi-resonant flyback topology. IC Role / Device Role / Timing Role: Primary-side snubber diode and secondary rectifier in dual-role configuration. Use Value: Low V_F maintains high efficiency at partial load; DO-201AD package allows through-hole mounting on thermally optimized PCBs.	Use Scenario: Auxiliary 12V supply in online UPS converting rectified AC to regulated DC for control logic. IC Role / Device Role / Timing Role: Input bridge rectifier feeding bulk capacitor, operating continuously at elevated ambient temperatures. Use Value: 150°C T_JMAX and –55°C to +150°C storage range ensure uninterrupted operation in enclosed, unventilated enclosures.

Automotive DC-DC Converters

Industrial Switch-Mode Power Supplies

Use Scenario: 12V-to-5V/3.3V buck converter in vehicle infotainment head unit with 200kHz switching frequency.

IC Role / Device Role / Timing Role: Output rectifier handling continuous 4A load with fast turn-off to minimize reverse recovery loss.

Use Value: 35ns t_rr and 1.0V V_F reduce total power loss by >0.4W vs. standard FR107, lowering thermal design burden.

Use Scenario: Secondary-side rectification in 48V-input telecom power module delivering 24V@3A.

IC Role / Device Role / Timing Role: Freewheeling diode in synchronous rectified forward converter, clamping inductive kick during MOSFET off-time.

Use Value: 200V V_RRM provides 2× safety margin over 48V bus transients; 125A I_FSM absorbs startup surges.

LED Driver Power Stages

UPS & Inverter Auxiliary Supplies

Use Scenario: Constant-current LED driver for commercial lighting using quasi-resonant flyback topology.

IC Role / Device Role / Timing Role: Primary-side snubber diode and secondary rectifier in dual-role configuration.

Use Value: Low V_F maintains high efficiency at partial load; DO-201AD package allows through-hole mounting on thermally optimized PCBs.

Use Scenario: Auxiliary 12V supply in online UPS converting rectified AC to regulated DC for control logic.

IC Role / Device Role / Timing Role: Input bridge rectifier feeding bulk capacitor, operating continuously at elevated ambient temperatures.

Use Value: 150°C T_JMAX and –55°C to +150°C storage range ensure uninterrupted operation in enclosed, unventilated enclosures.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH4L06S	V_RRM = 600V, t_rr = 30ns, V_F = 1.15V @ 4A - Higher voltage rating but higher forward drop	Preferred where system-level transients exceed 200V; less optimal for 12–48V systems due to excess voltage margin and higher conduction loss	Select when designing for universal input or legacy 400V bus architectures; verify thermal derating at 4A due to higher V_F
ON Semi MUR420	V_RRM = 200V, t_rr = 35ns, V_F = 1.05V @ 4A - Near-identical specs but not AEC-Q101 qualified	Suitable for industrial/commercial power supplies; not recommended for automotive ECUs or ADAS modules requiring automotive qualification	Choose for cost-sensitive non-automotive designs where AEC-Q101 is not mandated; confirm board-level ESD and thermal validation

Compared with STTH4L06S and MUR420, SF44GH uniquely combines 200V rating, 35ns recovery, 1.0V V_F, and AEC-Q101 qualification-making it the only option among the three validated for automotive under-hood power conversion without trade-offs in speed or efficiency.

Availability

SF44GH is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial switch-mode power supplies, and LED driver power stages requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.

Supply support for SF44GH 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 protection ICs since 1979.

The SF4xG series was developed to deliver AEC-Q101-qualified super fast rectifiers for automotive power conversion, balancing low V_F, fast t_rr, and rugged surge capability in standard DO-201AD packaging.

FAQ

What is the peak repetitive reverse voltage rating for SF44GH?

The SF44GH has a peak repetitive reverse voltage (V_RRM) rating of 200 V. This value is confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version G2105), where SF44G is explicitly listed with V_RRM = 200 V. It defines the maximum DC or sinusoidal AC reverse voltage the SF44GH can block repeatedly without breakdown.

Is SF44GH AEC-Q101 qualified, and what does the 'H' suffix indicate?

Yes, SF44GH is AEC-Q101 qualified-the 'H' suffix in the ordering code explicitly denotes AEC-Q101 qualification per the Ordering Information section of the Taiwan Semiconductor datasheet. This means the SF44GH has undergone stress testing including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing to meet automotive reliability standards.

What is the typical forward voltage of SF44GH at 4A and 25°C?

The typical forward voltage (V_F) of SF44GH is 1.0 V at I_F = 4 A and T_J = 25°C, as specified in the Electrical Specifications table under "Forward voltage(1)" for SF41G–SF44G variants. This value is measured under pulse conditions (PW = 0.3 ms) and reflects low conduction loss critical for high-efficiency power conversion.

What package type does SF44GH use, and are its leads lead-free?

SF44GH uses the DO-201AD axial-leaded package. Its leads are pure tin plated and fully RoHS compliant, meeting J-STD-002 for solderability and JESD201 Class 2 for whisker resistance. The molding compound is halogen-free per IEC 61249-2-21, and the package carries UL 94V-0 flammability rating.

What is the reverse recovery time (t_rr) specification for SF44GH?

The reverse recovery time (t_rr) for SF44GH is rated at ≤35 ns under test conditions of I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A, as stated in the Electrical Specifications table. This ultrafast recovery enables high-frequency operation in switching power supplies while minimizing switching losses and associated EMI.

SF44GH Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-201AD, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

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

Current - Average Rectified (Io):: 4A

Voltage - Forward (Vf) (Max) @ If:: 1 V @ 4 A

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

Reverse Recovery Time (trr):: 35 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 200 V

Capacitance @ Vr, F:: 100pF @ 4V, 1MHz

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Through Hole

Supplier Device Package:: DO-201AD

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

SF44GH FAQ

1.How can I place an order for SF44GH through Aetrix?

Please submit a Request for Quotation (RFQ) for SF44GH 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 SF44GH reliable?

The price and inventory of SF44GH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF44GH is usually 5 days.

3.What payment methods are accepted for SF44GH?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF44GH transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SF44GH?

SF44GH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SF44GH 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 SF44GH?

For technical support, including SF44GH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF44GH requirements.

6.How does Aetrix verify that SF44GH is sourced from the original manufacturer or authorized distributors?

All SF44GH 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 SF44GH meets industry standards.

7.What is the process for return or replacement of SF44GH?

All SF44GH units undergo pre-shipment inspection (PSI). If there is an issue with SF44GH, 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 SF44GH part is unused and in its original packaging.

Return procedure for SF44GH:

1.Submit a request within 90 days.

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

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