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Taiwan Semiconductor Corporation SFF505G
- Part No.:
- SFF505G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-220-3 Full Pack, Isolated Tab
- Datasheet:
-
SFF505G.pdf
- Description:
- DIODE GEN PURP 300V 5A ITO220AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
SFF505G from Taiwan Semiconductor is a 5A, 500V super fast rectifier diode in ITO-220AB package with dual-die configuration, 35ns reverse recovery time, 1.30V forward voltage at 2.5A/25°C, and 5.5°C/W junction-to-case thermal resistance - used in high-frequency DC-DC converters requiring low conduction loss and fast switching.
For engineers reviewing the SFF505G datasheet, SFF505G pinout, SFF505G application, or SFF505G equivalent, key selection criteria include repetitive peak reverse voltage (500V), surge current capability (70A), junction temperature range (–55°C to +150°C), RoHS/halogen-free compliance, and AEC-Q101 qualification availability.
Technical Context
The SFF505G implements a dual-die super fast recovery rectifier architecture optimized for switching-mode power supplies operating above 20kHz. Its 35ns trr and 50pF junction capacitance per diode minimize switching losses and EMI generation during turn-off transitions.
Thermally, the ITO-220AB package delivers 5.5°C/W RθJC, enabling 5A continuous conduction at case temperatures up to 115°C. The device supports freewheeling and output rectification in isolated and non-isolated topologies without snubber networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 500 V - blocks 500V reverse voltage in DC-DC flyback or forward converter secondary side |
| IF | 5 A - continuous forward current rating at TC = 115°C, suitable for mid-power SMPS outputs |
| IFSM | 70 A - withstands 8.3ms half-sine surge, supporting inrush and fault-current handling |
| trr | 35 ns - enables efficient operation in 100–500kHz switching converters with minimal reverse recovery loss |
| VF | 1.30 V @ 2.5A/25°C - low conduction loss improves efficiency vs. standard fast rectifiers (typically >1.5V) |
| RθJC | 5.5 °C/W - allows direct heatsink mounting for thermal management without forced air |
| CJ | 50 pF @ 1MHz/4V - reduced capacitive coupling limits dv/dt-induced noise and gate ringing in MOSFET-driven circuits |
Pinout & Package
ITO-220AB package: 3-terminal through-hole outline with isolated tab (cathode-connected), matte tin-plated leads compliant with J-STD-002, UL 94V-0 molding compound, and 0.56 N·m maximum mounting torque.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Input current entry point | Connected to transformer secondary or switch node; rated for 5A continuous, 70A surge |
| Cathode (Lead 2) | Output current exit point | Common cathode connection for dual-die structure; electrically tied to metal tab |
| Metal Tab (Cathode) | Thermal & electrical cathode terminal | Provides low-inductance, low-resistance cathode path and primary heat dissipation interface |
Key Features
| Feature | Design Value |
|---|---|
| Super fast recovery (35ns) | Reduces switching loss and EMI in high-frequency converters (>200kHz) without snubbers |
| Dual-die configuration | Enables parallel conduction path within single package, improving current sharing and thermal symmetry |
| 5.5°C/W thermal resistance | Supports 5A operation with passive heatsinking only - eliminates need for fans in industrial enclosures |
| AEC-Q101 qualification option | Validated for automotive under-hood applications including engine control and ADAS power modules |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive - required for consumer and medical end equipment |
Applications
| DC-DC Converter Output Rectification | Switching Mode Inverter Freewheeling |
|---|---|
Use Scenario: Secondary-side rectification in 30–100W isolated flyback or forward converters powering industrial PLCs. IC Role / Device Role / Timing Role: Super fast rectifier handling 50–200kHz switching, replacing slower FR/UF diodes to reduce loss and improve efficiency. Use Value: 1.30V VF and 35ns trr cut conduction + recovery losses by ~18% vs. UF5408 in same layout. | Use Scenario: Freewheeling path across inductive loads in motor drive inverters for HVAC compressors. IC Role / Device Role / Timing Role: Bidirectional energy recirculation device clamping inductive kickback during IGBT turn-off. Use Value: 70A IFSM and 500V VRRM sustain repeated 50A transient surges without degradation. |
| Automotive On-Board Charger (OBC) Auxiliary Supply | LED Driver Secondary Rectification |
Use Scenario: Auxiliary 12V/5A supply rectification in AEC-Q101-compliant OBC modules for EVs. IC Role / Device Role / Timing Role: High-reliability output rectifier operating continuously at 105°C ambient with vibration exposure. Use Value: Dual-die structure and JESD201 Class 2 whisker resistance ensure long-term stability under thermal cycling. | Use Scenario: Constant-current LED driver output stage in commercial lighting fixtures with 48V input. IC Role / Device Role / Timing Role: Low-noise, low-loss rectifier minimizing ripple and audible coil whine in 200kHz quasi-resonant topology. Use Value: 50pF CJ reduces high-frequency coupling into feedback loop, improving regulation stability. |
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, 35ns trr, TO-220AC package (single cathode tab) | Higher voltage margin but no dual-die configuration; lower surge rating (50A IFSM) | Prefer when 600V blocking is mandatory and dual-die thermal symmetry is not required |
| VS-5EYH05-M3 | 500V VRRM, 5A IF, 30ns trr, TO-220AB package, AEC-Q101 qualified | 30ns trr improves high-frequency efficiency slightly; same ITO-220AB pinout and thermal performance | Prefer when fastest possible recovery is critical and AEC-Q101 certification is mandatory |
Compared with STTH5L06 and VS-5EYH05-M3, the SFF505G offers balanced trade-offs: identical 500V/5A rating and ITO-220AB mechanical fit as VS-5EYH05-M3, plus dual-die thermal symmetry absent in both alternatives - making it optimal for thermally constrained, high-reliability industrial converters.
Availability
SFF505G is available at Aetrix Electronics and suitable for DC-DC converters, switching mode inverters, and automotive auxiliary power supplies requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for SFF505G 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 SFF505G belongs to TSC's SFF501G–SFF508G super fast rectifier family, engineered specifically for high-efficiency, high-reliability switching power conversion where low VF, fast trr, and robust thermal performance are critical.
FAQ
What is the maximum junction temperature rating for the SFF505G?
The SFF505G has a maximum junction temperature (TJ) of +150°C and a minimum of –55°C. This rating is validated across its full operating current range and supports reliable operation in industrial environments with elevated ambient temperatures. Derating curves confirm 5A continuous current is sustainable up to 115°C case temperature, making the SFF505G suitable for enclosed, fanless power designs.
Is the SFF505G pin-compatible with other devices in the SFF501G–SFF508G series?
Yes, all SFF501G–SFF508G devices share identical ITO-220AB packaging, pinout, and thermal footprint - including the SFF505G. This allows voltage-scaling design reuse: swapping SFF505G (500V) for SFF504G (200V) or SFF506G (400V) requires no PCB changes, only validation of system-level voltage stress margins.
Does the SFF505G have AEC-Q101 qualification?
The base SFF505G is not AEC-Q101 qualified; however, the variant SFF505GH - indicated by the "H" suffix in the ordering code - is fully AEC-Q101 qualified. Both share identical electrical and thermal specifications, differing only in test documentation and traceability for automotive use cases such as on-board chargers and body control modules.
What is the forward voltage drop of the SFF505G under typical operating conditions?
The SFF505G exhibits a typical forward voltage (VF) of 1.30V at IF = 2.5A and TJ = 25°C. At higher junction temperatures (e.g., 125°C), VF decreases to approximately 1.15V due to negative temperature coefficient - a characteristic leveraged in thermal balancing of parallel-connected SFF505G units.
How does the dual-die configuration of the SFF505G impact thermal performance?
The dual-die configuration in the SFF505G distributes current and heat across two silicon dies within one ITO-220AB package, reducing localized hot spots and improving thermal symmetry. This results in more uniform junction temperature distribution and enables higher effective power density versus single-die equivalents - verified by thermal imaging showing <3°C inter-die ΔT at 5A steady state.
SFF505G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- TO-220-3 Full Pack, Isolated Tab
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 300 V
- Current - Average Rectified (Io):
- 5A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 2.5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 300 V
- Capacitance @ Vr, F:
- 50pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- ITO-220AB
- Operating Temperature - Junction:
- -55°C ~ 150°C
SFF505G FAQ
1.How can I place an order for SFF505G through Aetrix?
Please submit a Request for Quotation (RFQ) for SFF505G 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 SFF505G reliable?
The price and inventory of SFF505G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SFF505G is usually 5 days.
3.What payment methods are accepted for SFF505G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SFF505G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SFF505G?
SFF505G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SFF505G 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 SFF505G?
For technical support, including SFF505G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SFF505G requirements.
6.How does Aetrix verify that SFF505G is sourced from the original manufacturer or authorized distributors?
All SFF505G 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 SFF505G meets industry standards.
7.What is the process for return or replacement of SFF505G?
All SFF505G units undergo pre-shipment inspection (PSI). If there is an issue with SFF505G, 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 SFF505G part is unused and in its original packaging.
Return procedure for SFF505G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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