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

Taiwan Semiconductor Corporation SF44G B0G

Name: SF44G B0G
Brand: Taiwan Semiconductor Corporation
SKU: SF44G B0G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SF44G B0G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-201AD, Axial

Datasheet:: SF44G B0G.pdf

Description:: DIODE GEN PURP 200V 4A DO201AD

Quantity:: RFQ Add To RFQ list

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Inventory:6,130

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Product details

Overview

SF44G B0G 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 125A surge capability - deployed in DC-DC converters and switching inverters requiring low conduction loss and rapid commutation.

For engineers reviewing the SF44G B0G datasheet, SF44G B0G pinout, SF44G B0G application, or SF44G B0G equivalent, key selection criteria include V_RRM = 200V, I_F = 4A, t_rr = 35ns, V_F = 1.0V (at 4A), and DO-201AD mechanical compatibility with high-reliability power conversion designs.

Technical Context

This single-die silicon rectifier uses epitaxial planar construction to achieve super-fast recovery (t_rr ≤ 35ns) with low Q_rr, enabling high-frequency operation in SMPS topologies. Its 200V V_RRM rating and 125A I_FSM support robust transient handling in flyback and forward converter freewheeling paths.

The device operates across –55°C to +150°C junction temperature range, with R_θJA = 25°C/W and cathode-band polarity marking. It meets JESD201 Class 2 whisker resistance and RoHS/halogen-free requirements per IEC 61249-2-21.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	200 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in clamp/freewheeling circuits
I_F	4 A - Continuous average forward current; determines heatsink sizing and thermal derating margin
t_rr	35 ns - Reverse recovery time; enables >100 kHz switching without excessive switching loss or ringing
V_F	1.0 V @ 4A, 25°C - Forward voltage drop; directly impacts conduction loss (P_cond ≈ 4A × 1.0V = 4W)
I_FSM	125 A - Non-repetitive surge current (8.3 ms sine); supports inrush and fault-current tolerance
C_J	100 pF @ 1 MHz, 4V - Junction capacitance; influences high-frequency noise coupling and snubber design

Pinout & Package

DO-201AD axial-leaded package with cathode band marking; 1.10g mass; pure tin-plated leads compliant with J-STD-002 solderability and UL 94V-0 molding compound.

Pin/Terminal	Circuit Role	Design Meaning
Anode (unmarked end)	Forward current entry point	Connected to lower-potential node (e.g., switch node in buck sync rectifier or transformer secondary)
Cathode (banded end)	Forward current exit / reverse blocking terminal	Connected to output rail or positive bus; blocks reverse voltage up to 200V

Key Features

Feature	Design Value
Super-fast recovery (t_rr ≤ 35 ns)	Enables efficient operation in 100–500 kHz SMPS without added snubbers or gate drive complexity
Low V_F = 1.0 V @ 4A	Reduces conduction loss by ~15% vs. standard fast rectifiers (e.g., 1.15V typical), improving thermal margin
High I_FSM = 125 A	Withstands 8.3ms half-sine surges common in AC line transients and motor startup events
DO-201AD with JESD201 Class 2 whisker resistance	Ensures long-term reliability in automotive and industrial environments with thermal cycling and vibration

Applications

DC-DC Converters	Switching Inverters
Use Scenario: Secondary-side rectification in isolated 48V-to-12V buck-derived converters for telecom power supplies. IC Role / Device Role / Timing Role: Freewheeling rectifier conducting during low-side switch off-time; critical for energy transfer efficiency. Use Value: 35ns t_rr minimizes reverse recovery charge (Q_rr), reducing switching loss and EMI generation at 250 kHz operation.	Use Scenario: Output stage rectification in 3-phase solar microinverters converting 200–400V DC to 230V AC. IC Role / Device Role / Timing Role: Unidirectional current path in H-bridge output stage; blocks reverse voltage during PWM dead-time. Use Value: 200V V_RRM and 125A I_FSM ensure safe operation under grid-voltage spikes and load dump conditions.
Freewheeling Diodes	SMPS Flyback Outputs
Use Scenario: Inductor freewheeling path in 24V industrial DC-DC modules powering PLC I/O cards. IC Role / Device Role / Timing Role: Provides low-loss current recirculation path when main MOSFET turns off; clamps inductive kick. Use Value: 1.0V V_F limits power dissipation to ≤4W at full load, easing thermal management on compact PCBs.	Use Scenario: Output rectification in 12V/3A flyback adapters for PoE-powered edge devices. IC Role / Device Role / Timing Role: Synchronous rectifier alternative where control complexity is avoided; handles discontinuous conduction mode (DCM). Use Value: 100pF C_J reduces capacitive coupling noise into feedback loop, improving regulation stability.

DC-DC Converters

Switching Inverters

Use Scenario: Secondary-side rectification in isolated 48V-to-12V buck-derived converters for telecom power supplies.

IC Role / Device Role / Timing Role: Freewheeling rectifier conducting during low-side switch off-time; critical for energy transfer efficiency.

Use Value: 35ns t_rr minimizes reverse recovery charge (Q_rr), reducing switching loss and EMI generation at 250 kHz operation.

Use Scenario: Output stage rectification in 3-phase solar microinverters converting 200–400V DC to 230V AC.

IC Role / Device Role / Timing Role: Unidirectional current path in H-bridge output stage; blocks reverse voltage during PWM dead-time.

Use Value: 200V V_RRM and 125A I_FSM ensure safe operation under grid-voltage spikes and load dump conditions.

Freewheeling Diodes

SMPS Flyback Outputs

Use Scenario: Inductor freewheeling path in 24V industrial DC-DC modules powering PLC I/O cards.

IC Role / Device Role / Timing Role: Provides low-loss current recirculation path when main MOSFET turns off; clamps inductive kick.

Use Value: 1.0V V_F limits power dissipation to ≤4W at full load, easing thermal management on compact PCBs.

Use Scenario: Output rectification in 12V/3A flyback adapters for PoE-powered edge devices.

IC Role / Device Role / Timing Role: Synchronous rectifier alternative where control complexity is avoided; handles discontinuous conduction mode (DCM).

Use Value: 100pF C_J reduces capacitive coupling noise into feedback loop, improving regulation stability.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH4L06D	V_RRM = 600V, t_rr = 30ns, V_F = 1.15V @ 4A - higher voltage rating, slightly slower recovery, higher V_F	Better suited for 400V+ PFC front-ends; less optimal for 200V-class DC-DC due to over-spec'd voltage and higher loss	Select when system requires ≥400V blocking or tighter t_rr tolerance; verify thermal margin with +0.15V V_F penalty
ON Semi MUR420	V_RRM = 200V, t_rr = 35ns, V_F = 0.97V @ 4A - identical voltage/speed, marginally lower V_F, same DO-201AD package	Drop-in replacement in legacy designs; identical footprint and thermal profile	Preferred where lowest possible conduction loss is prioritized and AEC-Q101 qualification is not required

Compared with STTH4L06D and MUR420, SF44G B0G offers balanced 200V rating, 35ns recovery, and 1.0V V_F in an AEC-Q101-capable package - making it optimal for cost-sensitive, high-volume 200V industrial and automotive auxiliary power supplies where reliability and thermal performance are jointly critical.

Availability

SF44G B0G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and freewheeling applications requiring stable component supply, consistent parametric performance, and long-term manufacturability assurance.

Supply support for SF44G B0G 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 automotive markets since 1979.

The SF4xG series targets high-efficiency power conversion systems needing reliable, low-loss super-fast rectification - optimized for SMPS, UPS, and renewable energy interfaces where speed, ruggedness, and regulatory compliance are essential.

FAQ

What is the maximum junction temperature rating for SF44G B0G?

The SF44G B0G has a maximum junction temperature (T_J) of +150°C and a minimum of –55°C. This wide operating range allows deployment in under-hood automotive modules and industrial enclosures without active cooling. Derating curves in the official TSC datasheet show usable current drops linearly above 25°C ambient, with zero derating up to 75°C at 4A DC.

Does SF44G B0G meet AEC-Q101 reliability standards?

No - SF44G B0G does not carry AEC-Q101 qualification. Only variants marked with "H" suffix (e.g., SF44GH) are AEC-Q101 qualified. The "B0G" suffix indicates tape-and-reel packaging (1,250 pcs/reel) in standard green compound, without automotive stress testing. For automotive use, specify SF44GH instead.

What is the reverse recovery time (t_rr) test condition for SF44G B0G?

The SF44G B0G reverse recovery time is measured at I_F = 0.5A, I_R = 1.0A, and I_rr = 0.25A, per JEDEC JESD24-11. This standardized condition ensures repeatable comparison across super-fast rectifiers. The specified t_rr ≤ 35ns applies at T_J = 25°C; recovery slows to ~55ns at 125°C junction temperature.

Is SF44G B0G compatible with lead-free reflow soldering processes?

Yes - SF44G B0G features pure tin-plated leads qualified to J-STD-002 for solderability and rated for peak reflow temperatures up to 260°C (JEDEC J-STD-020). The DO-201AD package withstands standard IPC/JEDEC moisture sensitivity level 1 (MSL-1) handling, requiring no baking prior to assembly.

How does the junction capacitance of SF44G B0G affect EMI in high-frequency converters?

SF44G B0G exhibits 100pF junction capacitance at 1MHz/4V, which couples high dv/dt switching nodes to ground or output rails. In 300–500kHz converters, this contributes to common-mode EMI; layout best practices (short leads, ground plane isolation, and RC snubbers) are recommended. Lower-C_J alternatives (e.g., 80pF in SF45G+) trade off voltage rating for reduced noise.

SF44G B0G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-201AD, Axial

Packaging:: Bulk

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:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-201AD

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

SF44G B0G FAQ

1.How can I place an order for SF44G B0G through Aetrix?

Please submit a Request for Quotation (RFQ) for SF44G B0G 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 SF44G B0G reliable?

The price and inventory of SF44G B0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF44G B0G is usually 5 days.

3.What payment methods are accepted for SF44G B0G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF44G B0G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SF44G B0G?

SF44G B0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SF44G B0G 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 SF44G B0G?

For technical support, including SF44G B0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF44G B0G requirements.

6.How does Aetrix verify that SF44G B0G is sourced from the original manufacturer or authorized distributors?

All SF44G B0G 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 SF44G B0G meets industry standards.

7.What is the process for return or replacement of SF44G B0G?

All SF44G B0G units undergo pre-shipment inspection (PSI). If there is an issue with SF44G B0G, 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 SF44G B0G part is unused and in its original packaging.

Return procedure for SF44G B0G:

1.Submit a request within 90 days.

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

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