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Taiwan Semiconductor Corporation SF31GHR0G
- Part No.:
- SF31GHR0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
SF31GHR0G.pdf
- Description:
- DIODE GEN PURP 50V 3A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:6,608
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Product details
Overview
SF31GHR0G from Taiwan Semiconductor is a 3A, 50V AEC-Q101-qualified super fast rectifier diode in DO-201AD package, featuring 0.95V forward voltage at 3A/25°C, 35ns reverse recovery time, and 125A surge capability - used in automotive DC-DC converters and switching inverters requiring high reliability and low conduction loss.
For engineers reviewing the SF31GHR0G datasheet, SF31GHR0G pinout, SF31GHR0G application, or SF31GHR0G equivalent, key selection criteria include repetitive peak reverse voltage (50V), junction-to-lead thermal resistance (10°C/W), AEC-Q101 qualification status, and DO-201AD mechanical compatibility with standard through-hole reflow or wave soldering processes.
Technical Context
This device is a single-die, silicon planar super fast recovery rectifier optimized for high-frequency switching applications. Its 35ns trr and low VF enable reduced switching losses in SMPS topologies operating up to several hundred kHz.
The DO-201AD package provides robust thermal performance (RθJL = 10°C/W) and meets UL 94V-0 flammability rating, while pure tin-plated leads ensure J-STD-002 solderability and JESD201 Class 2 whisker resistance - critical for automotive under-hood environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF (Avg) | 3 A - continuous forward current rating defines maximum steady-state power handling in DC-DC output stages |
| VRRM | 50 V - peak reverse blocking voltage sets minimum input/output voltage margin in buck or flyback designs |
| trr | 35 ns - reverse recovery time directly impacts switching loss and EMI in hard-switched converters |
| VF @ 3A, 25°C | 0.95 V - low forward voltage reduces conduction loss and thermal stress at rated load |
| IFSM (8.3ms) | 125 A - non-repetitive surge rating supports inrush current tolerance during startup or fault conditions |
| RθJL | 10 °C/W - junction-to-lead thermal resistance enables direct PCB copper pour heat sinking without heatsink |
| Junction Temp Range | –55°C to +150°C - extended temperature range supports operation in automotive engine compartments |
Pinout & Package
DO-201AD package: axial-leaded, molded plastic case with cathode band marking; lead material is pure tin-plated copper, compliant with J-STD-002 solderability and JESD201 Class 2 whisker requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., switch node in synchronous rectification or transformer secondary) |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; ties to output rail or filter capacitor positive; blocks reverse voltage up to 50V |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and UHAST per AEC standard |
| Super fast recovery (trr ≤ 35 ns) | Enables efficient operation in 100–500 kHz switching converters without excessive switching loss or ringing |
| Low VF (0.95 V @ 3A) | Reduces power dissipation by ~15% vs. standard fast rectifiers, lowering thermal design burden |
| DO-201AD mechanical robustness | UL 94V-0 molding compound and 1.10g mass support vibration resistance and thermal mass stability in automotive mounting |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally constrained supply chains |
Applications
| Automotive DC-DC Converters | Switching Mode Inverters |
|---|---|
Use Scenario: 12V-to-48V bidirectional DC-DC converter in mild hybrid electric vehicles (MHEV). IC Role / Device Role / Timing Role: Output rectifier in synchronous or asynchronous buck-boost stage. Use Value: 35ns trr minimizes dead-time loss; 50V VRRM matches system overvoltage margin; AEC-Q101 ensures 15-year under-hood reliability. | Use Scenario: Auxiliary power supply in solar microinverters converting DC panel output to AC grid interface. IC Role / Device Role / Timing Role: Freewheeling diode in H-bridge output stage. Use Value: 125A IFSM withstands transient surges from grid faults; DO-201AD package allows manual or automated through-hole assembly on high-Tg PCBs. |
| Industrial Switch-Mode Power Supplies | Freewheeling in Relay/Contactor Drivers |
Use Scenario: 24V industrial control power supply with 300kHz PWM frequency. IC Role / Device Role / Timing Role: Secondary-side rectifier in forward or flyback topology. Use Value: 0.95V VF reduces conduction loss at full 3A load; RθJL = 10°C/W enables direct copper pour thermal path without thermal vias. | Use Scenario: Inductive load suppression in PLC output modules driving solenoids or contactors. IC Role / Device Role / Timing Role: Freewheeling diode across coil to clamp back-EMF. Use Value: 50V VRRM exceeds typical 24–48V system rails; 150°C TJ max supports sealed enclosure operation up to 85°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH3L05S | 50V VRRM, 3A IF, 30ns trr, TO-220AC package (not DO-201AD) | Higher thermal mass but requires different footprint and mounting; no AEC-Q101 qualification | Preferred where higher surge margin or heatsink attachment is needed, not for space-constrained automotive PCBs |
| ON Semi MUR305 | 50V VRRM, 3A IF, 35ns trr, DO-201AD package, no AEC-Q101 | Same mechanical fit and electrical specs but lacks automotive qualification and halogen-free compliance | Acceptable for industrial non-automotive use where cost is prioritized over qualification and environmental compliance |
Compared with STTH3L05S and MUR305, SF31GHR0G uniquely combines DO-201AD form factor, AEC-Q101 qualification, halogen-free construction, and 0.95V VF - making it the only drop-in solution for automotive-grade 50V rectification where footprint, reliability, and regulatory compliance are jointly required.
Availability
SF31GHR0G is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial switching power supplies, and freewheeling applications requiring stable component supply, long-term lifecycle assurance, and AEC-Q101-compliant sourcing.
Supply support for SF31GHR0G 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, MOSFETs, and LED drivers since 1979.
The SF31GHR0G belongs to TSC's AEC-Q101-qualified SF3xG super fast rectifier family, engineered specifically for high-efficiency, high-reliability automotive and industrial switching power conversion where low VF, fast trr, and robust thermal performance are mandatory.
FAQ
What does the "H" and "R0G" suffix mean in SF31GHR0G?
The "H" denotes AEC-Q101 qualification per the ordering code table in the SF31G–SF38G datasheet. "R0G" indicates green (halogen-free) molding compound compliant with IEC 61249-2-21. SF31GHR0G is therefore the AEC-Q101-qualified, halogen-free version of the SF31G 50V super fast rectifier in DO-201AD package.
Is SF31GHR0G pin-compatible with standard DO-201AD rectifiers like 1N5408?
Yes - SF31GHR0G uses the standard DO-201AD outline with anode and cathode leads spaced per JEDEC DO-201AD dimensions. However, unlike 1N5408 (a general-purpose rectifier with ~2μs trr), SF31GHR0G is a super fast device (35ns trr) and must be substituted only where fast recovery is required and thermal limits permit.
What is the maximum allowable PCB pad size for SF31GHR0G in reflow soldering?
Taiwan Semiconductor specifies no explicit pad size limit, but recommends using standard DO-201AD land patterns per IPC-7351B (e.g., 2.5mm lead spacing, 1.5mm pad width). Thermal relief is advised for cathode/anode pads to prevent tombstoning; SF31GHR0G's 1.10g mass and tin-plated leads support both wave and reflow processes per J-STD-002.
Does SF31GHR0G require derating at elevated ambient temperatures?
Yes - the forward current rating drops linearly above 75°C ambient per the derating curve in the datasheet. At 100°C ambient, SF31GHR0G is rated for ~2.2A average forward current. This derating is enforced by its 150°C max junction temperature and 35°C/W RθJA; proper copper pour area is essential to maintain safe TJ in SF31GHR0G applications.
Can SF31GHR0G replace SF31G in existing designs?
Yes - SF31GHR0G is a direct replacement for SF31G with identical electrical specs and DO-201AD packaging. The "HR0G" variant adds AEC-Q101 qualification and halogen-free construction, so it may be used in all SF31G applications while enabling automotive qualification and RoHS/halogen compliance without layout or thermal changes.
SF31GHR0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 50 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 950 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 50 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
SF31GHR0G FAQ
1.How can I place an order for SF31GHR0G through Aetrix?
Please submit a Request for Quotation (RFQ) for SF31GHR0G 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 SF31GHR0G reliable?
The price and inventory of SF31GHR0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF31GHR0G is usually 5 days.
3.What payment methods are accepted for SF31GHR0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF31GHR0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SF31GHR0G?
SF31GHR0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SF31GHR0G 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 SF31GHR0G?
For technical support, including SF31GHR0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF31GHR0G requirements.
6.How does Aetrix verify that SF31GHR0G is sourced from the original manufacturer or authorized distributors?
All SF31GHR0G 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 SF31GHR0G meets industry standards.
7.What is the process for return or replacement of SF31GHR0G?
All SF31GHR0G units undergo pre-shipment inspection (PSI). If there is an issue with SF31GHR0G, 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 SF31GHR0G part is unused and in its original packaging.
Return procedure for SF31GHR0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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