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

Taiwan Semiconductor Corporation SF23G B0G

Name: SF23G B0G
Brand: Taiwan Semiconductor Corporation
SKU: SF23G B0G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SF23G B0G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-204AC, DO-15, Axial

Datasheet:: SF23G B0G.pdf

Description:: DIODE GEN PURP 150V 2A DO204AC

Quantity:: RFQ Add To RFQ list

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Inventory:9,079

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Product details

Overview

SF23G from Taiwan Semiconductor is a 2 A, 150 V super fast recovery rectifier diode in DO-204AC (DO-15) package, featuring 35 ns reverse recovery time, 0.95 V forward voltage at 2 A and 25°C, and 50 A surge current capability. It serves as a freewheeling or output rectifier in high-frequency switching power supplies.

For engineers reviewing the SF23G datasheet, SF23G pinout, SF23G application, or SF23G equivalent, key selection criteria include V_RRM = 150 V, I_F = 2 A, t_rr = 35 ns, V_F = 0.95 V, and thermal resistance R_θJA = 65 °C/W - all critical for efficiency and reliability in DC-DC converters and SMPS designs.

Technical Context

The SF23G employs a glass-passivated silicon junction optimized for fast switching with low conduction loss. Its single-die construction and DO-204AC package support high surge current handling (I_FSM = 50 A) while maintaining stable operation up to T_J = 150°C.

Designed for high-frequency rectification, it delivers low reverse recovery charge (Q_rr) implied by t_rr = 35 ns and exhibits low junction capacitance (C_J = 40 pF at 1 MHz, 4 V), enabling reduced switching losses in 100 kHz–1 MHz converter topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	150 V - maximum repetitive reverse voltage before breakdown; sets safe operating limit in 12–48 V output DC-DC stages
I_F	2 A continuous - average forward current rating at 75°C ambient; defines steady-state power delivery capacity
t_rr	35 ns - measured at I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A; enables efficient operation in >200 kHz switching circuits
V_F	0.95 V at I_F = 2 A, T_J = 25°C - low conduction loss directly reduces heat generation and improves system efficiency
C_J	40 pF at 1 MHz, V_R = 4.0 V - low junction capacitance minimizes capacitive switching loss and EMI in high-speed layouts
R_θJA	65 °C/W - junction-to-ambient thermal resistance under standard PCB mounting; determines required heatsinking for 2 A load

Pinout & Package

Package: DO-204AC (DO-15), axial leaded, glass-passivated, RoHS-compliant, halogen-free molding compound (UL 94V-0), cathode indicated by band.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential node (e.g., switch node in buck freewheel path); must withstand full I_F and I_FSM
Cathode	Forward current exit / reverse blocking terminal	Connected to higher-potential rail (e.g., output capacitor positive); blocks 150 V reverse voltage during off-state

Key Features

Feature	Design Value
Super fast recovery	t_rr = 35 ns enables high-frequency operation with minimal switching loss and reduced EMI generation
Glass passivated junction	Enhances long-term reliability and moisture resistance without requiring conformal coating in industrial environments
Low V_F (0.95 V)	Reduces conduction loss by ~15% vs. standard fast rectifiers (e.g., 1.1 V), lowering thermal stress at 2 A load
AEC-Q101 qualified option available	Supports automotive-grade qualification path (SF23G H variant); not applicable to base SF23G but confirms process robustness
High I_FSM (50 A)	Withstands transient overloads such as startup surges or short-circuit events in unregulated power stages

Applications

DC-DC Converters	Switching Inverters
Use Scenario: Output rectification in isolated flyback or forward converters delivering 12–24 V at up to 2 A. IC Role / Device Role / Timing Role: Freewheeling diode conducting during MOSFET off-time; defines minimum conduction period and energy recovery path. Use Value: 35 ns t_rr and 0.95 V V_F reduce switching loss and improve efficiency above 200 kHz, extending battery life in portable systems.	Use Scenario: Bridge leg anti-parallel diode in single-phase motor drive inverters operating at 10–20 kHz. IC Role / Device Role / Timing Role: Bidirectional current path during PWM dead-time; clamps inductive kickback and recirculates reactive energy. Use Value: 50 A I_FSM handles motor stall currents; 150 V V_RRM supports 100 V DC bus with margin for voltage spikes.
Freewheeling Circuits	SMPS Secondary Rectification
Use Scenario: Inductor current续流 path in buck regulators powering FPGA core rails or microcontroller domains. IC Role / Device Role / Timing Role: Provides low-loss return path when high-side switch turns off; duty cycle dependent on input-output voltage ratio. Use Value: Low R_θJA (65 °C/W) and 150°C T_JMAX allow compact layout without forced air cooling in space-constrained modules.	Use Scenario: Secondary-side synchronous rectification replacement in 5–12 V output AC-DC adapters and telecom power supplies. IC Role / Device Role / Timing Role: Uncontrolled rectifier converting transformer secondary AC to pulsating DC prior to filtering. Use Value: 40 pF C_J limits displacement current during voltage transitions, reducing gate drive loading on synchronous FETs in hybrid designs.

DC-DC Converters

Switching Inverters

Use Scenario: Output rectification in isolated flyback or forward converters delivering 12–24 V at up to 2 A.

IC Role / Device Role / Timing Role: Freewheeling diode conducting during MOSFET off-time; defines minimum conduction period and energy recovery path.

Use Value: 35 ns t_rr and 0.95 V V_F reduce switching loss and improve efficiency above 200 kHz, extending battery life in portable systems.

Use Scenario: Bridge leg anti-parallel diode in single-phase motor drive inverters operating at 10–20 kHz.

IC Role / Device Role / Timing Role: Bidirectional current path during PWM dead-time; clamps inductive kickback and recirculates reactive energy.

Use Value: 50 A I_FSM handles motor stall currents; 150 V V_RRM supports 100 V DC bus with margin for voltage spikes.

Freewheeling Circuits

SMPS Secondary Rectification

Use Scenario: Inductor current续流 path in buck regulators powering FPGA core rails or microcontroller domains.

IC Role / Device Role / Timing Role: Provides low-loss return path when high-side switch turns off; duty cycle dependent on input-output voltage ratio.

Use Value: Low R_θJA (65 °C/W) and 150°C T_JMAX allow compact layout without forced air cooling in space-constrained modules.

Use Scenario: Secondary-side synchronous rectification replacement in 5–12 V output AC-DC adapters and telecom power supplies.

IC Role / Device Role / Timing Role: Uncontrolled rectifier converting transformer secondary AC to pulsating DC prior to filtering.

Use Value: 40 pF C_J limits displacement current during voltage transitions, reducing gate drive loading on synchronous FETs in hybrid designs.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH2R015	V_RRM = 150 V, I_F = 2 A, t_rr = 30 ns, V_F = 0.92 V - slightly faster and lower V_F, but DO-201AD package (larger footprint)	Same 150 V/2 A class; better suited where board space allows larger package and tighter t_rr is prioritized	Select STTH2R015 if layout permits DO-201AD and sub-35 ns recovery is required; SF23G offers smaller DO-15 footprint
ES2D	V_RRM = 200 V, I_F = 2 A, t_rr = 35 ns, V_F = 0.95 V - identical speed and V_F, but higher 200 V rating and SMD SMB package	Enables surface-mount assembly and supports higher-voltage designs; lacks axial lead mechanical robustness	Choose ES2D for automated SMT production or 200 V system margin; SF23G preferred for through-hole reliability and cost-sensitive volume builds

Compared with STTH2R015 and ES2D, the SF23G provides optimal balance of DO-15 footprint, 150 V rating, and proven 35 ns performance in cost-sensitive industrial and consumer power supplies - making it ideal where axial mounting, thermal derating margin, and supply chain stability are priorities.

Availability

SF23G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and freewheeling circuits requiring stable component supply, consistent parametric performance, and long-term industrial availability.

Supply support for SF23G 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 SF23G belongs to TSC's SF2xG super fast rectifier family, engineered specifically for high-efficiency, high-reliability AC-DC and DC-DC conversion in industrial, computing, and consumer power systems.

FAQ

What is the maximum junction temperature rating for the SF23G?

The SF23G has a maximum junction temperature (T_J) rating of +150°C, verified per absolute maximum ratings table in the official Taiwan Semiconductor datasheet (Version H2105). This allows reliable operation in enclosed industrial enclosures or high-ambient environments when derated per the forward current derating curve. The SF23G maintains specified electrical parameters up to this limit, provided thermal design meets R_θJA = 65 °C/W requirements.

Is the SF23G AEC-Q101 qualified?

No, the base SF23G is not AEC-Q101 qualified. However, Taiwan Semiconductor offers an AEC-Q101 qualified variant designated SF23G H, which shares identical electrical and thermal specifications but undergoes additional automotive-grade stress testing. The SF23G itself is rated for industrial use and meets RoHS and halogen-free standards, but automotive deployment requires explicit validation of the SF23G H version.

What is the reverse recovery time (t_rr) test condition for the SF23G?

The SF23G reverse recovery time of 35 ns is measured under the condition: I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A, as specified in the Electrical Specifications table of the Taiwan Semiconductor datasheet. This standardized test reflects real-world switching behavior in hard-commutated topologies and ensures consistent comparison across super fast rectifiers like the SF23G.

Does the SF23G have a specified junction capacitance value?

Yes, the SF23G has a typical junction capacitance (C_J) of 40 pF, measured at 1 MHz and V_R = 4.0 V, per the Electrical Specifications table. This value applies to the SF21G–SF24G subgroup and is confirmed in the Characteristics Curves section (Fig. 2). It directly impacts high-frequency switching noise and snubber design in SMPS applications using the SF23G.

What packaging options are available for the SF23G?

The SF23G is supplied in DO-204AC (DO-15) package with two standard packing formats: 3,500 units per tape-and-reel (ordering code SF23G) and 1,500 units per ammo box (ordering code SF23G A0G). Both options feature pure tin-plated leads compliant with J-STD-002 solderability and meet JESD201 Class 2 whisker resistance requirements - ensuring reliable assembly for the SF23G across high-volume manufacturing lines.

SF23G B0G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-204AC, DO-15, Axial

Packaging:: Bulk

Product Status:: Discontinued at Digi-Key

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 150 V

Current - Average Rectified (Io):: 2A

Voltage - Forward (Vf) (Max) @ If:: 950 mV @ 2 A

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

Reverse Recovery Time (trr):: 35 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 150 V

Capacitance @ Vr, F:: 40pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-204AC (DO-15)

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

SF23G B0G FAQ

1.How can I place an order for SF23G B0G through Aetrix?

Please submit a Request for Quotation (RFQ) for SF23G 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 SF23G B0G reliable?

The price and inventory of SF23G B0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF23G B0G is usually 5 days.

3.What payment methods are accepted for SF23G B0G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF23G B0G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SF23G B0G?

SF23G B0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SF23G 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 SF23G B0G?

For technical support, including SF23G B0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF23G B0G requirements.

6.How does Aetrix verify that SF23G B0G is sourced from the original manufacturer or authorized distributors?

All SF23G 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 SF23G B0G meets industry standards.

7.What is the process for return or replacement of SF23G B0G?

All SF23G B0G units undergo pre-shipment inspection (PSI). If there is an issue with SF23G 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 SF23G B0G part is unused and in its original packaging.

Return procedure for SF23G B0G:

1.Submit a request within 90 days.

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

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