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

Taiwan Semiconductor Corporation SF61G R0G

Name: SF61G R0G
Brand: Taiwan Semiconductor Corporation
SKU: SF61G R0G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SF61G R0G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-201AD, Axial

Datasheet:: SF61G R0G.pdf

Description:: DIODE GEN PURP 50V 6A DO201AD

Quantity:: RFQ Add To RFQ list

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Inventory:5,731

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Product details

Overview

SF61G from Taiwan Semiconductor is a 6A, 50V super fast recovery rectifier diode in DO-201AD package, featuring 0.975V forward voltage at 6A/25°C, 35ns reverse recovery time, and 150A surge capability - deployed in DC-DC converters and freewheeling paths where low conduction loss and fast switching are critical.

For engineers reviewing the SF61G datasheet, SF61G pinout, SF61G application, or SF61G equivalent, key selection criteria include V_RRM = 50V, I_F = 6A, t_rr = 35ns, R_θJL = 5°C/W, and DO-201AD mechanical compatibility with high-reliability power conversion designs.

Technical Context

This single-die, unidirectional super fast rectifier operates with a maximum junction temperature of 150°C and supports repetitive peak reverse voltages up to 50V. Its low 0.975V forward voltage at rated current minimizes conduction losses in high-frequency switching topologies.

The device achieves 35ns reverse recovery time under IF = 0.5A, IR = 1.0A, Irr = 0.25A conditions and exhibits 5°C/W junction-to-lead thermal resistance - enabling efficient heat transfer in compact board layouts without forced cooling.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	50 V - Maximum repetitive reverse blocking voltage; defines safe operating range in flyback/freewheeling circuits
I_F	6 A - Continuous forward current rating; supports sustained power delivery in 12–48V DC-DC stages
t_rr	35 ns - Measured reverse recovery time; enables operation up to ~3 MHz switching frequencies with low switching loss
V_F	0.975 V @ 6A, 25°C - Low conduction drop reduces I²R losses and improves system efficiency by ~0.5–1.2% vs standard FRDs
R_θJL	5 °C/W - Junction-to-lead thermal resistance; allows direct heatsinking via PCB copper pour or clip-mounting
I_FSM	150 A - Non-repetitive surge rating (8.3ms sine); withstands inrush and fault transients in industrial SMPS
C_J	100 pF @ 1MHz, 4V - Junction capacitance impacts EMI filtering design and snubber sizing in high-dv/dt applications

Pinout & Package

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

Pin/Terminal	Circuit Role	Design Meaning
Anode (Lead 1)	Forward current entry point	Connected to lower-potential node (e.g., switch node in buck converter or transformer secondary center-tap)
Cathode (Lead 2, banded end)	Forward current exit / reverse blocking terminal	Connected to output rail or positive bus; polarity must be observed to prevent catastrophic failure

Key Features

Feature	Design Value
Super fast recovery (t_rr = 35 ns)	Enables high-frequency operation (>500 kHz) with minimal switching loss and reduced EMI generation
Low V_F (0.975 V @ 6A)	Reduces conduction loss by ~15–20% versus standard fast recovery diodes in same package
DO-201AD mechanical robustness	UL 94V-0 molding compound and 1.2g mass support vibration-resistant mounting in automotive/industrial environments
AEC-Q101 qualification option (SF61GH)	Validated for automotive powertrain and body electronics requiring extended temperature cycling and reliability testing
Halogen-free & RoHS compliant	Meets IEC 61249-2-21 and global environmental compliance mandates for industrial and consumer production

Applications

DC-DC Converters	Switching Inverters
Use Scenario: Secondary-side rectification in isolated 24V–48V telecom and server PSUs operating at 200–500 kHz. IC Role / Device Role / Timing Role: Freewheeling diode conducting during MOSFET off-time; handles continuous 6A load current with minimal voltage drop. Use Value: 0.975V V_F reduces average conduction loss to <1.2W, lowering thermal stress on adjacent magnetics and MOSFETs.	Use Scenario: Output stage anti-parallel diode in half-bridge motor drives for HVAC blowers and industrial pumps. IC Role / Device Role / Timing Role: Bidirectional current path during dead-time commutation; recovers within 35ns to prevent shoot-through risk. Use Value: 35ns t_rr ensures clean zero-voltage switching transitions and suppresses voltage spikes >15V over standard FRDs.
Freewheeling Circuits	Power Factor Correction
Use Scenario: Inductive load flyback path in solenoid drivers and relay interface modules. IC Role / Device Role / Timing Role: Clamps inductive kickback energy during coil de-energization; sustains 150A surge for 8.3ms. Use Value: 150A I_FSM prevents avalanche failure during repeated actuation cycles in 24V industrial control systems.	Use Scenario: Boost diode in active PFC front-ends for LED drivers and AC adapters (85–265VAC input). IC Role / Device Role / Timing Role: Unidirectional conduction during boost switch off-phase; blocks 50V reverse voltage while passing 6A average current. Use Value: 50V V_RRM matches low-V_OUT PFC designs (e.g., 42V boost), minimizing reverse leakage (<5 µA @ 25°C) and improving light-load efficiency.

DC-DC Converters

Switching Inverters

Use Scenario: Secondary-side rectification in isolated 24V–48V telecom and server PSUs operating at 200–500 kHz.

IC Role / Device Role / Timing Role: Freewheeling diode conducting during MOSFET off-time; handles continuous 6A load current with minimal voltage drop.

Use Value: 0.975V V_F reduces average conduction loss to <1.2W, lowering thermal stress on adjacent magnetics and MOSFETs.

Use Scenario: Output stage anti-parallel diode in half-bridge motor drives for HVAC blowers and industrial pumps.

IC Role / Device Role / Timing Role: Bidirectional current path during dead-time commutation; recovers within 35ns to prevent shoot-through risk.

Use Value: 35ns t_rr ensures clean zero-voltage switching transitions and suppresses voltage spikes >15V over standard FRDs.

Freewheeling Circuits

Power Factor Correction

Use Scenario: Inductive load flyback path in solenoid drivers and relay interface modules.

IC Role / Device Role / Timing Role: Clamps inductive kickback energy during coil de-energization; sustains 150A surge for 8.3ms.

Use Value: 150A I_FSM prevents avalanche failure during repeated actuation cycles in 24V industrial control systems.

Use Scenario: Boost diode in active PFC front-ends for LED drivers and AC adapters (85–265VAC input).

IC Role / Device Role / Timing Role: Unidirectional conduction during boost switch off-phase; blocks 50V reverse voltage while passing 6A average current.

Use Value: 50V V_RRM matches low-V_OUT PFC designs (e.g., 42V boost), minimizing reverse leakage (<5 µA @ 25°C) and improving light-load efficiency.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH6L06S	V_RRM = 60V, t_rr = 30ns, V_F = 0.95V @ 6A - slightly faster but higher cost and different DO-201AD footprint tolerance	Preferred in 60V-rated PFC stages; not drop-in due to tighter lead spacing and different marking orientation	Select when 30ns t_rr is mandatory and layout allows minor pad adjustment
ON Semi MUR620E	V_RRM = 200V, t_rr = 35ns, V_F = 0.97V @ 6A - higher voltage rating, identical speed and forward drop	Suitable for universal-input SMPS where 200V blocking is required; over-spec'd for 50V-only designs	Choose only if future voltage scalability or multi-platform BOM consolidation justifies higher V_RRM

Compared with STTH6L06S and MUR620E, SF61G offers optimal balance of 50V rating, 35ns recovery, and DO-201AD mechanical fit for cost-sensitive 24–48V DC-DC and freewheeling use - avoiding over-engineering while meeting AEC-Q101-ready variants (SF61GH) for automotive-grade deployment.

Availability

SF61G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and freewheeling circuits requiring stable component supply, long-term lifecycle assurance, and RoHS/halogen-free compliance.

Supply support for SF61G 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 SF61G belongs to TSC's Super Fast Rectifier family, engineered specifically for high-efficiency, high-reliability power conversion in space-constrained and thermally demanding applications - emphasizing low V_F, fast t_rr, and robust mechanical packaging.

FAQ

What is the maximum junction temperature rating for SF61G?

The SF61G has a maximum junction temperature (T_J) rating of +150°C, verified per absolute maximum ratings table. This allows reliable operation in ambient temperatures up to +105°C when mounted on adequate copper area or heatsink, given its 5°C/W junction-to-lead thermal resistance. Derating curves confirm 6A continuous current is sustainable up to 125°C case temperature.

Is SF61G AEC-Q101 qualified?

The base SF61G is not AEC-Q101 qualified; however, the variant SF61GH is explicitly qualified per AEC-Q101 Rev D for automotive applications. SF61GH shares identical electrical specs and DO-201AD packaging but undergoes additional stress testing including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing.

What is the reverse recovery time test condition for SF61G?

SF61G reverse recovery time (t_rr) is measured at 35ns under the condition: forward current I_F = 0.5A, reverse current I_R = 1.0A, and reverse recovery current I_rr = 0.25A, per the Electrical Specifications table. This reflects real-world commutation behavior in hard-switched topologies like buck converters and motor drives.

How does SF61G compare to standard fast recovery diodes in terms of forward voltage?

SF61G delivers 0.975V forward voltage at 6A and 25°C - approximately 0.15–0.25V lower than typical standard fast recovery diodes (e.g., UF5408, 1.15V). This reduction lowers conduction loss by 15–20%, directly improving efficiency in high-duty-cycle applications such as 48V server VRMs and industrial DC supplies.

What packaging and reel options are available for SF61G?

SF61G is supplied in DO-201AD package with two standard packing options: 1,250 units per 12mm tape-and-reel (ordering code SF61G), and 500 units per ammo box (ordering code SF61G A0G). Both use pure tin-plated leads compliant with J-STD-002 and meet JESD201 Class 2 whisker resistance requirements.

SF61G R0G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-201AD, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 50 V

Current - Average Rectified (Io):: 6A

Voltage - Forward (Vf) (Max) @ If:: 975 mV @ 6 A

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

Reverse Recovery Time (trr):: 35 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 50 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

SF61G R0G FAQ

1.How can I place an order for SF61G R0G through Aetrix?

Please submit a Request for Quotation (RFQ) for SF61G R0G 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 SF61G R0G reliable?

The price and inventory of SF61G R0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF61G R0G is usually 5 days.

3.What payment methods are accepted for SF61G R0G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF61G R0G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SF61G R0G?

SF61G R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SF61G R0G 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 SF61G R0G?

For technical support, including SF61G R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF61G R0G requirements.

6.How does Aetrix verify that SF61G R0G is sourced from the original manufacturer or authorized distributors?

All SF61G R0G 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 SF61G R0G meets industry standards.

7.What is the process for return or replacement of SF61G R0G?

All SF61G R0G units undergo pre-shipment inspection (PSI). If there is an issue with SF61G R0G, 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 SF61G R0G part is unused and in its original packaging.

Return procedure for SF61G R0G:

1.Submit a request within 90 days.

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

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