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Taiwan Semiconductor Corporation SF23G-T
- Part No.:
- SF23G-T
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SF23G-T.pdf
- Description:
- 35NS, 2A, 150V, SUPER FAST RECOV
- Quantity:
- Payment:
- Shipping:
Inventory:2,644
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Product details
Overview
SF23G-T 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-T datasheet, SF23G-T pinout, SF23G-T application, or SF23G-T equivalent, key selection criteria include VRRM = 150 V, trr = 35 ns, VF = 0.95 V @ 2 A, IFSM = 50 A, and thermal resistance RθJA = 65°C/W - all critical for efficiency and reliability in DC-DC converters and SMPS designs.
Technical Context
The SF23G-T employs a glass-passivated silicon junction optimized for fast switching with low conduction loss. Its 150 V repetitive peak reverse voltage and 35 ns reverse recovery time enable operation in 100–500 kHz switching topologies without excessive switching loss.
Thermal performance is defined by RθJC = 16°C/W and RθJA = 65°C/W, supporting 2 A continuous forward current at ambient temperatures up to 75°C with standard PCB copper area. Junction capacitance is 40 pF at 4.0 V reverse bias and 1 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 150 V - Maximum non-repetitive reverse blocking voltage; sets upper limit for input/output voltage rails in flyback or buck-derived converters. |
| IF | 2 A - Continuous average forward current rating; defines steady-state power handling under thermal design constraints. |
| trr | 35 ns - Measured at IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A; enables efficient operation in high-frequency SMPS with minimal switching loss. |
| VF | 0.95 V @ 2 A, 25°C - Forward voltage drop directly impacts conduction loss and thermal rise in rectification paths. |
| IFSM | 50 A - Peak non-repetitive surge current (8.3 ms half-sine); supports inrush and transient overload conditions without failure. |
| CJ | 40 pF @ 4.0 V, 1 MHz - Junction capacitance affects high-frequency noise coupling and snubber design in switching nodes. |
Pinout & Package
DO-204AC (DO-15) axial-leaded package with cathode indicated by a band on the body. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD 201 Class 1A whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., switch node in flyback, source in synchronous rectifier reference). |
| Cathode | Forward current exit point / reverse voltage blocking terminal | Marked by band; connects to output rail or positive bus; blocks 150 V reverse potential during off-state. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enhances long-term reliability and moisture resistance in humid or industrial environments without hermetic sealing. |
| Low VF (0.95 V) | Reduces conduction loss by ~15% vs. standard fast rectifiers at 2 A, lowering thermal stress in compact layouts. |
| 35 ns trr | Minimizes reverse recovery charge (Qrr) and associated switching loss in 200–500 kHz converters. |
| RoHS & halogen-free | Complies with IEC 61249-2-21; supports environmentally regulated industrial and consumer end-equipment certifications. |
Applications
| DC–DC Converters | Switching Mode Inverters |
|---|---|
Use Scenario: Secondary-side rectification in isolated 12 V/24 V output DC–DC modules for telecom and server PSUs. IC Role / Device Role / Timing Role: Output rectifier converting high-frequency transformer secondary AC to regulated DC. Use Value: 0.95 V VF and 35 ns trr reduce power loss and EMI generation compared to standard recovery diodes. |
Use Scenario: Freewheeling path in H-bridge motor drive inverters for HVAC and industrial pumps. IC Role / Device Role / Timing Role: Clamp inductive kickback during PWM dead-time, preventing voltage spikes across MOSFETs. Use Value: 50 A IFSM withstands motor startup surges; 150 V VRRM covers 100 V bus applications with margin. |
| SMPS Power Supplies | Freewheeling Diodes |
Use Scenario: Output rectification in 30–100 W offline flyback adapters for industrial IoT gateways. IC Role / Device Role / Timing Role: High-efficiency unidirectional current path synchronized with primary-side switching frequency. Use Value: 40 pF CJ limits capacitive coupling noise into feedback circuits, improving regulation stability. |
Use Scenario: Inductive load suppression in solenoid drivers and relay interface boards. IC Role / Device Role / Timing Role: Provides low-impedance return path for stored magnetic energy during turn-off. Use Value: Glass passivation ensures stable leakage current (<5 µA @ 25°C) over 10+ year field life in temperature-cycled environments. |
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 | VRRM = 150 V, trr = 30 ns, VF = 0.92 V @ 2 A - slightly faster and lower VF, but RθJA = 70°C/W. | Better suited for higher-frequency (>300 kHz) designs where Qrr minimization is critical. | Prefer STTH2R015 when layout allows tighter thermal management or higher switching frequencies are used. |
| ES2D | VRRM = 200 V, trr = 35 ns, VF = 0.95 V @ 2 A - higher voltage rating, same speed and VF, DO-214AA package. | Supports 200 V bus systems; requires PCB footprint change due to SMD DO-214AA vs. axial DO-15. | Select ES2D only if system-level voltage margin requires >150 V blocking or SMT assembly is mandatory. |
Compared with STTH2R015 and ES2D, the SF23G-T offers optimal balance of 150 V rating, 35 ns recovery, and axial DO-15 compatibility for cost-sensitive through-hole power supplies - making it ideal for legacy-compatible industrial SMPS upgrades without board redesign.
Availability
SF23G-T is available at Aetrix Electronics and suitable for DC–DC converters, switching mode inverters, and freewheeling applications requiring stable component supply, consistent parametric performance, and long-term industrial availability.
Supply support for SF23G-T 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 MOSFETs since 1979.
The SF23G-T belongs to TSC's SFxG-T super fast rectifier family, engineered for high-efficiency, high-reliability power conversion in industrial and telecom power supplies where low VF, fast trr, and robust surge capability are essential.
FAQ
What is the maximum junction temperature rating for SF23G-T?
The SF23G-T has a maximum junction temperature (TJ) of +150°C, verified per absolute maximum ratings in the official TSC datasheet Version C2105. This rating allows operation in high-ambient industrial environments when derated per the forward current derating curve. Thermal design must ensure junction temperature remains below this limit under worst-case load and ambient conditions for SF23G-T.
Is SF23G-T RoHS and halogen-free compliant?
Yes, SF23G-T is RoHS compliant and halogen-free per IEC 61249-2-21, as confirmed in the "Features" section of the TSC datasheet. The molding compound meets UL 94V-0 flammability rating, and leads are pure tin-plated - satisfying environmental compliance requirements for industrial and consumer end equipment.
What is the reverse leakage current specification for SF23G-T?
SF23G-T specifies reverse current (IR) ≤ 5 µA at rated VR and TJ = 25°C, and ≤ 100 µA at TJ = 125°C, per electrical specifications in the TSC datasheet. These values reflect stable junction behavior under thermal stress and are measured using a 30 ms pulse test, ensuring reliability in high-temperature power applications.
Does SF23G-T have a specified junction-to-case thermal resistance?
Yes, SF23G-T has a typical junction-to-case thermal resistance (RθJC) of 16°C/W, documented in the "Thermal Performance" section of the TSC datasheet. This value enables accurate thermal modeling when mounting the DO-15 package to heatsinks or thermally enhanced PCB copper areas for sustained 2 A operation.
What marking code identifies SF23G-T on the device body?
SF23G-T is marked with "SF23F" on the device body, as shown in the "Absolute Maximum Ratings" table of the TSC datasheet - where "SF23F-T" corresponds to the 150 V variant. The "G" suffix denotes green (halogen-free) compound, and "F" indicates the 150 V rating within the SF2xG-T family.
SF23G-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AC, DO-15, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-T FAQ
1.How can I place an order for SF23G-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SF23G-T 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-T reliable?
The price and inventory of SF23G-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF23G-T is usually 5 days.
3.What payment methods are accepted for SF23G-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF23G-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SF23G-T?
SF23G-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SF23G-T 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-T?
For technical support, including SF23G-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF23G-T requirements.
6.How does Aetrix verify that SF23G-T is sourced from the original manufacturer or authorized distributors?
All SF23G-T 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-T meets industry standards.
7.What is the process for return or replacement of SF23G-T?
All SF23G-T units undergo pre-shipment inspection (PSI). If there is an issue with SF23G-T, 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-T part is unused and in its original packaging.
Return procedure for SF23G-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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