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Taiwan Semiconductor Corporation SFF501G
- Part No.:
- SFF501G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Diode Arrays
- Package:
- TO-220-3 Full Pack, Isolated Tab
- Datasheet:
-
SFF501G.pdf
- Description:
- DIODE ARRAY GP 50V 5A ITO220AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,883
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Product details
Overview
SFF501G from Taiwan Semiconductor is a 5A, 50V repetitive peak reverse voltage super fast rectifier diode in ITO-220AB package, featuring 35ns reverse recovery time, 0.98V forward voltage at 2.5A/25°C, and 5.5°C/W junction-to-case thermal resistance-designed for high-efficiency freewheeling in DC-DC converters.
For engineers reviewing the SFF501G datasheet, SFF501G pinout, SFF501G application, or SFF501G equivalent, key selection criteria include its 50V VRRM, dual-die configuration, AEC-Q101 qualification option (SFF501GH), UL recognition (E-326243), and ITO-220AB mechanical compatibility with heatsink mounting.
Technical Context
The SFF501G employs a super fast recovery silicon PN junction optimized for switching-mode power supplies, delivering low conduction loss (VF = 0.98V @ 2.5A) and minimal switching loss (trr = 35ns). Its dual-die construction supports parallel operation within a single ITO-220AB outline.
Thermally, the device sustains continuous forward current up to 5A with derating above 25°C case temperature, enabled by RθJC = 5.5°C/W and 150°C maximum junction temperature. It meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum repetitive reverse blocking voltage; defines minimum input/output isolation in 12–24V DC-DC stages |
| IF | 5 A - Continuous average forward current; supports 60W+ output at typical efficiency levels |
| IFSM | 70 A - Non-repetitive surge rating (8.3ms half-sine); withstands startup/load dump transients |
| trr | 35 ns - Reverse recovery time; enables >100 kHz switching without excessive switching loss |
| VF | 0.98 V @ 2.5A, 25°C - Low forward drop reduces conduction loss and thermal load in high-duty-cycle operation |
| RθJC | 5.5 °C/W - Thermal resistance from junction to case; enables direct heatsink mounting for passive thermal management |
| CJ | 70 pF @ 1 MHz, 4V - Junction capacitance impacts EMI and snubber design in high-frequency topologies |
Pinout & Package
Package: ITO-220AB - Insulated TO-220 variant with isolated tab, matte tin-plated leads, UL 94V-0 molding compound, and 0.56 N·m max mounting torque. Polarity marked on device body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Forward current entry point | Connected to switching node or inductor output; must handle full load current and transient surges |
| Cathode (Lead 2) | Forward current exit / reverse blocking terminal | Typically tied to ground or low-side switch; determines common reference for voltage sensing |
| Tab (Isolated) | Thermal path only (electrically isolated) | Mounts directly to heatsink without insulator; enables efficient heat extraction while maintaining circuit isolation |
Key Features
| Feature | Design Value |
|---|---|
| Super fast recovery (trr = 35 ns) | Reduces switching losses and EMI generation in 100–500 kHz SMPS designs |
| Low VF (0.98 V @ 2.5A) | Lowers conduction loss by ~15% vs. standard fast rectifiers, improving thermal margin at 5A |
| Dual-die configuration | Enables redundant or interleaved operation within same footprint; improves reliability and current sharing |
| UL Recognized (E-326243) | Validates safety compliance for end-equipment certification in industrial and automotive power supplies |
| AEC-Q101 qualified option (SFF501GH) | Supports automotive-grade deployment in engine control, ADAS power rails, and infotainment DC-DC stages |
Applications
| DC-DC Converters | Switching Inverters |
|---|---|
Use Scenario: Secondary-side synchronous rectification in isolated 12V→3.3V/5V flyback converters. IC Role / Device Role / Timing Role: Freewheeling diode providing low-loss current path during MOSFET off-time. Use Value: 35ns trr minimizes reverse recovery charge, reducing cross-conduction loss and enabling higher frequency operation. | Use Scenario: Output stage freewheeling in 24V/48V battery-powered motor inverters. IC Role / Device Role / Timing Role: Bidirectional current handling during PWM dead-time; blocks reverse voltage during active switching. Use Value: 70A IFSM withstands motor stall currents; 5.5°C/W RθJC supports compact heatsink integration. |
| Freewheeling Circuits | Industrial Power Supplies |
Use Scenario: Inductive load suppression in solenoid drivers and relay coils. IC Role / Device Role / Timing Role: Clamping diode dissipating stored inductive energy as heat during turn-off. Use Value: 0.98V VF limits clamping voltage overshoot and reduces thermal stress under repeated actuation. | Use Scenario: Input rectification and hold-up in DIN-rail mounted 24V/48V AC-DC front-ends. IC Role / Device Role / Timing Role: Primary rectifier converting AC line to bulk DC; operates continuously at elevated ambient temperatures. Use Value: 150°C TJMAX and -55°C to +150°C storage range ensure reliability across industrial temperature extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH5L06 | 600V VRRM, 5A IF, trr = 35ns, TO-220AC package (non-isolated tab) | Higher voltage rating; requires electrical isolation kit for heatsink mounting | Select when >50V reverse blocking is needed and tab isolation is not required |
| VS-5EYH05-M3 | 50V VRRM, 5A IF, trr = 30ns, DO-201AD package (axial lead) | Lower thermal performance (RθJC ≈ 25°C/W); limited to lower-power or forced-air-cooled use | Select for cost-sensitive, space-constrained PCBs where heatsinking is impractical |
Compared with STTH5L06 and VS-5EYH05-M3, the SFF501G uniquely combines 50V rating, ITO-220AB's electrically isolated tab, and 5.5°C/W thermal resistance-making it optimal for thermally demanding, medium-power freewheeling where isolation and heatsink coupling are critical.
Availability
SFF501G 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 lifecycle support.
Supply support for SFF501G 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 diodes, and MOSFETs for industrial and automotive markets.
The SFF501G belongs to TSC's Super Fast Rectifier family, engineered specifically for high-frequency switching power conversion with emphasis on low VF, fast trr, and robust thermal/mechanical reliability in harsh environments.
FAQ
What is the maximum junction temperature rating for the SFF501G?
The SFF501G has a maximum junction temperature (TJ) of +150°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet (Version I2105). This rating allows continuous operation in high-ambient industrial environments when paired with appropriate heatsinking based on its 5.5°C/W RθJC. The SFF501G also supports storage across -55°C to +150°C.
Does the SFF501G have an electrically isolated tab?
Yes, the SFF501G uses the ITO-220AB package, which features an electrically isolated metal tab. Unlike standard TO-220 variants, this isolation eliminates the need for insulating washers or pads when mounting to a heatsink-reducing thermal resistance and assembly complexity. Polarity marking on the device body confirms anode/cathode orientation relative to the tab.
Is the SFF501G AEC-Q101 qualified?
The base SFF501G is not AEC-Q101 qualified; however, the variant SFF501GH is explicitly qualified per AEC-Q101 Rev D for automotive applications. Both share identical electrical specifications and ITO-220AB packaging, but only SFF501GH undergoes additional stress testing including temperature cycling, highly accelerated life testing (HALT), and unbiased high humidity operating life (uHHOL).
What is the reverse recovery time (trr) of the SFF501G and how is it measured?
The SFF501G has a reverse recovery time (trr) of 35 ns, measured under conditions of IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A, per the official Taiwan Semiconductor test circuit diagram (Fig.6). This value reflects the time required for minority carriers to clear after forward conduction, directly impacting switching loss and EMI in high-frequency power stages.
Can the SFF501G replace a standard fast recovery diode in an existing 50V design?
Yes, the SFF501G can directly replace standard fast recovery diodes rated for ≥50V and ≥5A in most cases, provided mechanical fit (ITO-220AB footprint) and thermal interface are validated. Its lower VF (0.98V vs. typical 1.2–1.5V) and faster trr (35ns vs. 50–100ns) improve efficiency and reduce switching noise-but layout parasitics and snubber tuning may require review due to higher di/dt capability.
SFF501G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- TO-220-3 Full Pack, Isolated Tab
- Packaging:
- Tube
- Product Status:
- Active
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 50 V
- Current - Average Rectified (Io) (per Diode):
- 5A
- Voltage - Forward (Vf) (Max) @ If:
- 980 mV @ 2.5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 50 V
- Operating Temperature - Junction:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- ITO-220AB
SFF501G FAQ
1.How can I place an order for SFF501G through Aetrix?
Please submit a Request for Quotation (RFQ) for SFF501G 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 SFF501G reliable?
The price and inventory of SFF501G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SFF501G is usually 5 days.
3.What payment methods are accepted for SFF501G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SFF501G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SFF501G?
SFF501G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SFF501G 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 SFF501G?
For technical support, including SFF501G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SFF501G requirements.
6.How does Aetrix verify that SFF501G is sourced from the original manufacturer or authorized distributors?
All SFF501G 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 SFF501G meets industry standards.
7.What is the process for return or replacement of SFF501G?
All SFF501G units undergo pre-shipment inspection (PSI). If there is an issue with SFF501G, 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 SFF501G part is unused and in its original packaging.
Return procedure for SFF501G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SFF501G Tags
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