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

Taiwan Semiconductor Corporation SF12G R0G

Name: SF12G R0G
Brand: Taiwan Semiconductor Corporation
SKU: SF12G R0G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SF12G R0G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-204AL, DO-41, Axial

Datasheet:: SF12G R0G.pdf

Description:: DIODE GEN PURP 100V 1A DO204AL

Quantity:: RFQ Add To RFQ list

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Product details

Overview

SF12G R0G from Taiwan Semiconductor is a 1A, 100V super fast recovery rectifier diode in DO-204AL (DO-41) package, featuring 35ns reverse recovery time, 0.95V forward voltage at 1A/25°C, and 30A surge current rating. It serves as a freewheeling or output rectifier in high-frequency switching power supplies.

For engineers reviewing the SF12G R0G datasheet, SF12G R0G pinout, SF12G R0G application, or SF12G R0G equivalent, key selection criteria include V_RRM = 100 V, I_F = 1 A, t_rr = 35 ns, V_F = 0.95 V, and thermal resistance R_θJL = 20 °C/W - all critical for efficiency and reliability in DC-DC converters and SMPS designs.

Technical Context

The SF12G R0G is a single-die, planar junction silicon rectifier optimized for high-speed switching. Its super fast recovery (t_rr ≤ 35 ns) minimizes switching losses in 50–500 kHz converters, while low V_F reduces conduction loss under continuous 1A DC load.

Designed for surface-mount compatible through-hole assembly, it uses pure tin-plated leads compliant with J-STD-002 and meets JESD201 Class 2 whisker resistance. The DO-204AL package supports 150°C maximum junction temperature and UL 94V-0 molding compound.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - Maximum repetitive reverse voltage; defines safe blocking capability in 12–48V output rectification stages
I_F	1 A - Continuous forward current rating; supports steady-state operation in compact DC-DC modules without forced cooling
t_rr	35 ns - Reverse recovery time; enables efficient operation up to ~500 kHz switching frequency with minimal tail current loss
V_F	0.95 V @ 1A, 25°C - Low forward voltage drop; reduces power dissipation to ≤0.95 W at full rated DC current
R_θJL	20 °C/W - Junction-to-lead thermal resistance; allows direct PCB copper pad heat sinking for thermal management
I_FSM	30 A - Non-repetitive surge current (8.3 ms); withstands startup inrush and transient overloads in industrial SMPS
C_J	20 pF @ 1 MHz, 4 V - Junction capacitance; contributes to low EMI in high-dv/dt switching nodes

Pinout & Package

DO-204AL (DO-41) axial lead package with cathode band marking; leads are pure tin-plated, solderable per J-STD-002, and meet JESD201 Class 2 whisker resistance. Weight: 0.350 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode (unmarked end)	Forward current entry point	Connected to lower-potential node (e.g., switch node or ground return) in freewheeling path
Cathode (banded end)	Forward current exit / reverse blocking terminal	Connected to output rail or positive bus; polarity band ensures correct orientation during manual or automated placement

Key Features

Feature	Design Value
Super fast recovery (t_rr ≤ 35 ns)	Enables high-frequency operation with reduced switching loss and EMI vs. standard rectifiers
Low V_F = 0.95 V @ 1A	Lowers conduction loss by ~15–20% compared to 1.1 V alternatives, improving efficiency in 12–24V outputs
DO-204AL package with UL 94V-0 compound	Supports automated insertion and reflow-compatible hand-soldering while meeting flame-retardant safety standards
AEC-Q101 qualified option available (SF12GH)	Validated for automotive under-hood applications requiring extended temperature cycling and reliability testing
RoHS & halogen-free (IEC 61249-2-21)	Complies with environmental regulations for industrial and consumer electronics manufacturing

Applications

DC-DC Converter Output Rectification	Switching Mode Power Supply Freewheeling
Use Scenario: Used as secondary-side rectifier in isolated flyback or forward converters delivering 5–24V at ≤1A. IC Role / Device Role / Timing Role: Unidirectional current valve converting high-frequency AC from transformer secondary into regulated DC output. Use Value: 35 ns t_rr and 0.95 V V_F jointly reduce total power loss by ≥0.3 W vs. standard fast rectifiers at 100 kHz, improving thermal margin.	Use Scenario: Placed across inductive loads (e.g., solenoids, relay coils, motor windings) in 24–48V industrial control systems. IC Role / Device Role / Timing Role: Provides low-impedance path for inductor current decay during switch-off, preventing voltage spikes. Use Value: 100 V V_RRM safely clamps transients up to 80 V peak; 30 A I_FSM handles repeated inductive kick energy without degradation.
AC-DC Adapter Secondary Rectification	LED Driver Constant-Current Loop
Use Scenario: Rectifies transformer output in compact wall adapters (e.g., 12V/1A for routers or IoT gateways). IC Role / Device Role / Timing Role: Converts high-frequency transformer AC into smoothed DC before linear or buck regulation. Use Value: DO-204AL footprint enables cost-effective through-hole assembly; 0.35 g weight supports lightweight portable design requirements.	Use Scenario: Serves as freewheeling diode in buck-based LED drivers powering 10–20 W architectural lighting arrays. IC Role / Device Role / Timing Role: Maintains continuous LED current during PWM dimming cycles by recirculating inductor energy. Use Value: 20 pF C_J limits capacitive coupling noise into sensitive current-sense paths, preserving dimming linearity.

DC-DC Converter Output Rectification

Switching Mode Power Supply Freewheeling

Use Scenario: Used as secondary-side rectifier in isolated flyback or forward converters delivering 5–24V at ≤1A.

IC Role / Device Role / Timing Role: Unidirectional current valve converting high-frequency AC from transformer secondary into regulated DC output.

Use Value: 35 ns t_rr and 0.95 V V_F jointly reduce total power loss by ≥0.3 W vs. standard fast rectifiers at 100 kHz, improving thermal margin.

Use Scenario: Placed across inductive loads (e.g., solenoids, relay coils, motor windings) in 24–48V industrial control systems.

IC Role / Device Role / Timing Role: Provides low-impedance path for inductor current decay during switch-off, preventing voltage spikes.

Use Value: 100 V V_RRM safely clamps transients up to 80 V peak; 30 A I_FSM handles repeated inductive kick energy without degradation.

AC-DC Adapter Secondary Rectification

LED Driver Constant-Current Loop

Use Scenario: Rectifies transformer output in compact wall adapters (e.g., 12V/1A for routers or IoT gateways).

IC Role / Device Role / Timing Role: Converts high-frequency transformer AC into smoothed DC before linear or buck regulation.

Use Value: DO-204AL footprint enables cost-effective through-hole assembly; 0.35 g weight supports lightweight portable design requirements.

Use Scenario: Serves as freewheeling diode in buck-based LED drivers powering 10–20 W architectural lighting arrays.

IC Role / Device Role / Timing Role: Maintains continuous LED current during PWM dimming cycles by recirculating inductor energy.

Use Value: 20 pF C_J limits capacitive coupling noise into sensitive current-sense paths, preserving dimming linearity.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R01AP	V_RRM = 100 V, t_rr = 25 ns, V_F = 0.97 V @ 1A - slightly faster but higher V_F; DO-41 package	Optimized for ultra-high-frequency (>1 MHz) resonant converters where t_rr dominates loss	Select when minimizing reverse recovery charge is prioritized over forward conduction loss
ON Semi MUR110E	V_RRM = 100 V, t_rr = 50 ns, V_F = 0.92 V @ 1A - slower recovery but lowest V_F; same DO-41 package	Better suited for lower-frequency (<100 kHz) SMPS where conduction loss dominates	Select when thermal budget is constrained and switching frequency is ≤60 kHz

Compared with STTH1R01AP and MUR110E, the SF12G R0G delivers balanced performance: its 35 ns t_rr and 0.95 V V_F make it optimal for 100–300 kHz industrial DC-DC converters where both switching and conduction losses must be jointly minimized without package change.

Availability

SF12G R0G is available at Aetrix Electronics and suitable for DC-DC converter output rectification, switching mode power supply freewheeling, and AC-DC adapter secondary rectification requiring stable component supply and consistent DO-204AL form factor.

Supply support for SF12G R0G 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 rectifiers, TVS diodes, MOSFETs, and bipolar transistors.

The SF11G–SF18G super fast rectifier family was designed specifically for high-efficiency, high-reliability switching power conversion in industrial, computing, and automotive auxiliary power systems.

FAQ

What is the maximum junction temperature rating for SF12G R0G?

The SF12G R0G has a maximum junction temperature (T_J) of +150°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet Version H2104. This rating enables reliable operation in enclosed industrial enclosures or under moderate airflow, provided thermal design respects R_θJL = 20°C/W and R_θJA = 80°C/W limits. Derating curves confirm 1A continuous current is sustainable up to 100°C ambient with adequate copper pour.

Does SF12G R0G have AEC-Q101 qualification?

The base SF12G R0G is not AEC-Q101 qualified; however, the pin-identical variant SF12GH (with 'H' suffix) is fully AEC-Q101 qualified per Version H2104 documentation. SF12G R0G shares identical electrical and thermal specifications with SF12GH but lacks the automotive-grade stress test validation required for under-hood use. For non-automotive industrial applications, SF12G R0G remains fully suitable.

What is the reverse recovery time (t_rr) specification for SF12G R0G?

The SF12G R0G has a maximum reverse recovery time (t_rr) of 35 ns, measured under conditions IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A, as specified in the Electrical Specifications table of the Taiwan Semiconductor datasheet. This value is confirmed across the SF11G–SF14G subgroup and enables efficient operation in switching power supplies operating up to 500 kHz without excessive switching loss or EMI generation.

Is SF12G R0G RoHS and halogen-free compliant?

Yes, SF12G R0G is RoHS compliant and halogen-free per IEC 61249-2-21, as explicitly stated in the FEATURES section of the Taiwan Semiconductor datasheet. The molding compound contains no brominated or chlorinated flame retardants, and lead content is below 1000 ppm. This compliance supports export to EU, China, and other regulated markets requiring full substance declarations.

What does the 'R0G' suffix indicate in SF12G R0G?

The 'R0G' suffix in SF12G R0G denotes packaging and environmental compliance: 'R0' indicates tape-and-reel packaging (5,000 pcs per reel), and 'G' signifies green (halogen-free) compound per IEC 61249-2-21. This matches the ordering code structure defined in the datasheet's ORDERING INFORMATION section, where SF1xG = standard green version in tape-and-reel, distinct from SF1xG A0G (ammo box) or SF1xGH (AEC-Q101 qualified).

SF12G R0G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-204AL, DO-41, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 100 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 950 mV @ 1 A

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

Reverse Recovery Time (trr):: 35 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 100 V

Capacitance @ Vr, F:: 20pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-204AL (DO-41)

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

SF12G R0G FAQ

1.How can I place an order for SF12G R0G through Aetrix?

Please submit a Request for Quotation (RFQ) for SF12G 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 SF12G R0G reliable?

The price and inventory of SF12G R0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF12G R0G is usually 5 days.

3.What payment methods are accepted for SF12G R0G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF12G R0G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SF12G R0G?

SF12G R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SF12G 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 SF12G R0G?

For technical support, including SF12G R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF12G R0G requirements.

6.How does Aetrix verify that SF12G R0G is sourced from the original manufacturer or authorized distributors?

All SF12G 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 SF12G R0G meets industry standards.

7.What is the process for return or replacement of SF12G R0G?

All SF12G R0G units undergo pre-shipment inspection (PSI). If there is an issue with SF12G 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 SF12G R0G part is unused and in its original packaging.

Return procedure for SF12G R0G:

1.Submit a request within 90 days.

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

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