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Taiwan Semiconductor Corporation SF45GH
- Part No.:
- SF45GH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
SF45GH.pdf
- Description:
- DIODE GEN PURP 300V 4A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
SF45GH from Taiwan Semiconductor is a 4A, 400V repetitive peak reverse voltage (VRRM) AEC-Q101-qualified super fast rectifier diode in DO-201AD package, featuring 1.3V forward voltage at 4A/25°C, 35ns reverse recovery time, and 80pF junction capacitance - deployed in automotive-grade DC-DC converters and switching inverters.
For engineers reviewing the SF45GH datasheet, SF45GH pinout, SF45GH application, or SF45GH equivalent, key selection criteria include VRRM = 400V, VF = 1.3V @ 4A, trr = 35ns, TJ(max) = 150°C, and AEC-Q101 qualification for under-hood power conversion systems.
Technical Context
This super fast rectifier uses a single-die silicon PN junction optimized for low conduction loss and rapid carrier recombination. Its 35ns reverse recovery time enables high-frequency operation up to ~500kHz in hard-switched topologies without excessive switching loss or voltage overshoot.
The device operates across -55°C to +150°C junction temperature range with 25°C/W junction-to-ambient thermal resistance. Its pure tin-plated DO-201AD leads meet J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Maximum non-repetitive reverse blocking voltage; defines safe operating limit in flyback/freewheeling paths |
| IF | 4 A - Continuous average forward current; determines heatsink sizing in steady-state power delivery |
| VF @ 4A, 25°C | 1.3 V - Forward conduction loss per diode; directly impacts efficiency in high-current DC-DC stages |
| trr | 35 ns - Reverse recovery time; enables use in 200–500 kHz SMPS without significant switching loss penalty |
| CJ @ 1MHz, 4V | 80 pF - Junction capacitance; affects high-frequency EMI and snubber design in resonant converters |
| IFSM (8.3ms) | 125 A - Non-repetitive surge current rating; supports inrush and fault-current handling in automotive start-stop systems |
| TJ(max) | 150 °C - Maximum junction temperature; allows operation in engine compartment environments with minimal derating |
Pinout & Package
Package: DO-201AD - Axial leaded, molded plastic case with cathode band marking; 1.10g mass; UL 94V-0 rated compound; RoHS and halogen-free compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Forward current entry point | Connected to lower-potential node (e.g., switch node in buck freewheel path) |
| Cathode (Lead 2, banded end) | Forward current exit / reverse blocking terminal | Connected to higher-potential rail; blocks reverse voltage up to 400V |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive power electronics including engine control modules and ADAS power supplies |
| Super fast recovery (trr ≤ 35 ns) | Minimizes reverse recovery charge (Qrr), reducing switching losses and EMI in high-frequency converters |
| Low VF = 1.3 V @ 4A | Reduces conduction loss by ~15% vs. standard fast rectifiers at same current, improving thermal margin |
| DO-201AD with tin-plated leads | Ensures reliable solder joint formation and long-term intermetallic stability in industrial reflow profiles |
| Junction-to-ambient RθJA = 25°C/W | Enables 4A continuous operation with minimal heatsinking in ambient ≤ 75°C environments |
Applications
| Automotive DC-DC Converters | Industrial Switch-Mode Inverters |
|---|---|
Use Scenario: 12V-to-48V bidirectional converter in 48V mild-hybrid vehicles. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous buck-boost stage, conducting during low-side switch off-time. Use Value: 400V VRRM withstands transients from load dump; 150°C TJ(max) supports under-hood placement without forced cooling. | Use Scenario: Output rectification in 3kW three-phase UPS inverter output stage. IC Role / Device Role / Timing Role: Fast recovery rectifier in IGBT-based inverter leg, clamping reactive energy during commutation. Use Value: 35ns trr prevents cross-conduction losses; 125A IFSM handles motor stall surges without failure. |
| Server Power Supply ORing | Renewable Energy Charge Controllers |
Use Scenario: ORing diode in redundant 12V server backplane power distribution. IC Role / Device Role / Timing Role: Unidirectional current gate preventing backfeed between parallel PSUs. Use Value: 1.3V VF reduces power dissipation vs. Schottky alternatives, enabling higher density without airflow dependency. | Use Scenario: MPPT charge controller input rectification in solar microinverters. IC Role / Device Role / Timing Role: Input bridge rectifier converting AC from transformer-isolated inverter output to DC bus. Use Value: 80pF CJ minimizes capacitive coupling noise into sensitive MPPT sensing circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH4R04DJF | VRRM = 400V, VF = 1.25V @ 4A, trr = 30ns, TO-220AC package | Higher thermal mass but requires PCB mounting hardware; not axial-leaded | Preferred where board space permits and higher surge robustness is needed |
| ON Semi MUR440G | VRRM = 400V, VF = 1.3V @ 4A, trr = 35ns, DO-201AD, no AEC-Q101 qualification | Lacks automotive qualification; identical electrical specs and footprint | Cost-sensitive industrial designs where AEC-Q101 is not mandated |
Compared with SF45GH, STTH4R04DJF offers slightly faster recovery and better thermal handling but demands different mechanical integration, while MUR440G matches all electrical parameters and package yet omits automotive qualification - making SF45GH the sole choice for AEC-Q101-compliant 400V super fast rectification.
Availability
SF45GH is available at Aetrix Electronics and suitable for automotive power conversion, industrial UPS systems, server ORing architectures, and renewable energy charge controllers requiring stable component supply with full traceability and lifecycle support.
Supply support for SF45GH 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 devices, rectifiers, TVS, and protection ICs since 1979.
The SF4xG series was designed specifically for high-reliability, high-frequency power conversion in automotive and industrial environments - emphasizing AEC-Q101 compliance, low VF, and consistent trr performance across voltage grades.
FAQ
What is the peak repetitive reverse voltage (VRRM) rating of the SF45GH?
The SF45GH has a VRRM rating of 400 V, meaning it can block up to 400 volts of reverse voltage repeatedly without breakdown. This value is confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version G2105), and aligns with its SF45G designation where '45' maps to 400V in the SF41G–SF48G family coding scheme. The SF45GH maintains this rating across its full operating temperature range.
Is the SF45GH qualified to AEC-Q101 standards?
Yes, the SF45GH is explicitly AEC-Q101 qualified, as indicated by the 'H' suffix in its ordering code per the official Taiwan Semiconductor documentation. This qualification covers stress testing for temperature cycling, humidity bias, mechanical shock, and high-temperature operating life - validating its suitability for automotive under-hood applications. The base SF45G variant lacks this qualification; only SF45GH carries the AEC-Q101 certification.
What is the forward voltage drop of the SF45GH at 4A and 25°C?
The SF45GH exhibits a maximum forward voltage (VF) of 1.3 V at 4 A and 25°C junction temperature, as specified in the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) to avoid self-heating effects. At elevated temperatures (e.g., 125°C), VF decreases slightly due to semiconductor physics, but system-level thermal design must ensure the 150°C maximum junction temperature is never exceeded.
Does the SF45GH have the same package and pinout as the SF45G?
Yes, the SF45GH uses the identical DO-201AD package and axial lead configuration as the SF45G, with cathode indicated by a band on the banded end. The 'H' suffix denotes AEC-Q101 qualification only - no mechanical, electrical, or pinout changes are introduced. Both variants share identical dimensions, weight (1.10 g), lead plating (pure tin), and polarity marking, enabling direct replacement where qualification is required.
What is the reverse recovery time (trr) specification for the SF45GH?
The SF45GH has a maximum reverse recovery time (trr) of 35 ns, tested under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A conditions. This value is consistent across the SF45G–SF48G subgroup and reflects the device's super fast recovery capability. The 35 ns trr enables efficient operation in switching power supplies operating up to ~500 kHz, minimizing switching losses and associated EMI generation in high-frequency converter designs.
SF45GH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 300 V
- Current - Average Rectified (Io):
- 4A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 4 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 300 V
- Capacitance @ Vr, F:
- 80pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -55°C ~ 150°C
SF45GH FAQ
1.How can I place an order for SF45GH through Aetrix?
Please submit a Request for Quotation (RFQ) for SF45GH 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 SF45GH reliable?
The price and inventory of SF45GH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF45GH is usually 5 days.
3.What payment methods are accepted for SF45GH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF45GH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SF45GH?
SF45GH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SF45GH 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 SF45GH?
For technical support, including SF45GH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF45GH requirements.
6.How does Aetrix verify that SF45GH is sourced from the original manufacturer or authorized distributors?
All SF45GH 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 SF45GH meets industry standards.
7.What is the process for return or replacement of SF45GH?
All SF45GH units undergo pre-shipment inspection (PSI). If there is an issue with SF45GH, 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 SF45GH part is unused and in its original packaging.
Return procedure for SF45GH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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