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Taiwan Semiconductor Corporation SF34GH
- Part No.:
- SF34GH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
SF34GH.pdf
- Description:
- DIODE GEN PURP 200V 3A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:2,486
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Product details
Overview
SF34GH from Taiwan Semiconductor is a 200V, 3A super fast recovery rectifier diode in DO-201AD package, featuring 35ns reverse recovery time, 0.95V forward voltage at 3A/25°C, and AEC-Q101 qualification for automotive-grade reliability. It serves as a primary output rectifier in high-frequency DC-DC converters requiring low conduction loss and fast switching.
For engineers reviewing the SF34GH datasheet, SF34GH pinout, SF34GH application, or SF34GH equivalent, key selection criteria include its 200V repetitive peak reverse voltage (VRRM), 125A surge current rating (IFSM), junction-to-lead thermal resistance of 10°C/W, and compliance with AEC-Q101 for under-hood automotive power supplies.
Technical Context
The SF34GH employs a single-die silicon PN junction structure optimized for super-fast recovery (trr ≤ 35ns), enabling efficient operation in switching-mode power supplies operating above 50kHz. Its low VF (0.95V typ. @ 3A) and low CJ (80pF @ 1MHz, 4V) reduce both conduction and capacitive switching losses.
Thermally, the DO-201AD package delivers RθJL = 10°C/W and RθJA = 35°C/W, supporting continuous 3A operation up to 125°C ambient when mounted on ≥1cm² copper area. The device is rated for TJ = –55°C to +150°C and passes JESD201 Class 2 whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - Maximum non-repetitive reverse voltage the device blocks reliably in circuit |
| IF | 3 A - Continuous average forward current rating at TA = 75°C with adequate heatsinking |
| IFSM | 125 A - Peak non-repetitive surge current capability (8.3ms half-sine), critical for input fault tolerance |
| trr | 35 ns - Reverse recovery time defining minimum dead-time requirements in synchronous topologies |
| VF | 0.95 V - Typical forward voltage drop at 3A/25°C, directly determining conduction loss in rectification stage |
| RθJL | 10 °C/W - Junction-to-lead thermal resistance, enabling direct thermal coupling to PCB copper for passive cooling |
| CJ | 80 pF - Junction capacitance at 1MHz/4V, influencing high-frequency EMI and snubber design |
Pinout & Package
DO-201AD axial-leaded package with cathode band marking; leads are pure tin-plated, solderable per J-STD-002, UL 94V-0 molded compound, 1.10g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Forward current entry point | Connected to lower-potential side (e.g., transformer secondary center-tap or switch node) |
| Cathode (banded end) | Forward current exit / reverse blocking terminal | Connected to output rail; polarity band prevents misorientation during manual assembly |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive power modules requiring temperature cycling, HTRB, and mechanical shock compliance |
| Super fast recovery (trr ≤ 35ns) | Enables >100kHz switching in PFC and isolated DC-DC without excessive switching loss or ringing |
| Low VF (0.95V @ 3A) | Reduces I²R conduction loss by ~15% vs. standard fast rectifiers, improving efficiency in 12V–48V outputs |
| High IFSM (125A) | Withstands inrush and short-circuit surges in industrial SMPS without bond-wire fusing |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing |
Applications
| Automotive DC-DC Converter | Industrial Switch-Mode Power Supply |
|---|---|
Use Scenario: 12V-to-5V/3.3V buck converter in engine control unit (ECU) with 200kHz switching frequency. IC Role / Device Role / Timing Role: Output freewheeling rectifier handling 3A continuous load with transient surges up to 125A. Use Value: AEC-Q101 qualification ensures reliability across –40°C to +125°C ambient; 35ns trr minimizes reverse recovery loss during high-frequency switching. | Use Scenario: 48V-input telecom rectifier module delivering 12V@10A using dual-phase interleaved topology. IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier replacement where ultra-low VF and fast recovery reduce heat generation. Use Value: 0.95V VF at 3A lowers conduction loss by 0.3W per device vs. legacy fast diodes, reducing heatsink size by 30%. |
| LED Driver Power Stage | UPS Inverter Freewheeling Path |
Use Scenario: Constant-current LED driver for commercial lighting with 200V bus and 35kHz flyback operation. IC Role / Device Role / Timing Role: Primary-side clamp diode and secondary-side output rectifier in quasi-resonant flyback. Use Value: 200V VRRM safely handles reflected voltage spikes; 80pF CJ limits high-frequency noise coupling into feedback loop. | Use Scenario: Bidirectional IGBT-based UPS inverter with regenerative braking path. IC Role / Device Role / Timing Role: Freewheeling diode across IGBTs to conduct reactive current during turn-off transitions. Use Value: 125A IFSM supports motor regeneration surges; 10°C/W RθJL enables direct mounting to shared heatsink without thermal interface pads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH3L02 | VRRM = 200V, IF = 3A, trr = 30ns, VF = 0.92V - slightly faster but not AEC-Q101 qualified | Preferred for industrial/commercial SMPS where automotive qualification is unnecessary | Select STTH3L02 when lowest possible trr is prioritized over automotive stress testing compliance |
| ON Semi MUR320 | VRRM = 200V, IF = 3A, trr = 35ns, VF = 0.97V, no AEC-Q101 - same recovery speed but higher VF and no automotive validation | Suitable for cost-sensitive consumer power adapters with <100kHz operation | Choose MUR320 only if AEC-Q101 is not required and lead-time for SF34GH is constrained |
Compared with STTH3L02 and MUR320, the SF34GH uniquely combines AEC-Q101 qualification, 0.95V VF, and 35ns trr in DO-201AD - making it the only option qualified for automotive under-hood DC-DC where thermal robustness and reliability validation are mandatory.
Availability
SF34GH is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial switch-mode power supplies, and LED driver power stages requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SF34GH 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 since 1979.
The SF3xG series was designed specifically for high-efficiency, high-reliability power conversion in automotive and industrial environments - emphasizing AEC-Q101 qualification, low VF, and fast recovery in standardized DO-201AD packaging.
FAQ
What is the maximum junction temperature rating for SF34GH?
The SF34GH has a maximum junction temperature (TJ MAX) of +150°C, verified per AEC-Q101 stress test conditions. This allows reliable operation in under-hood automotive environments where ambient temperatures reach +125°C, provided thermal design maintains junction temperature below this limit. The SF34GH's RθJL of 10°C/W supports this via direct lead-to-PCB thermal transfer.
Is SF34GH pin-compatible with other SF3xG variants like SF33GH or SF35GH?
Yes - all SF3xGH devices share identical DO-201AD package dimensions, lead spacing, and cathode band polarity marking. However, VRRM differs: SF33GH = 150V, SF34GH = 200V, SF35GH = 300V. Substitution requires verifying that the circuit's peak reverse voltage does not exceed the selected variant's VRRM rating.
Does SF34GH require derating at elevated ambient temperatures?
Yes - the SF34GH's average forward current (IF) must be derated linearly above 75°C ambient. At 100°C ambient, maximum IF drops to ~2.1A; at 125°C, it falls to ~1.3A. Derating follows the curve in Figure 1 of the SF31G–SF38G datasheet, based on measured RθJA = 35°C/W and thermal interface conditions.
What does the "H" suffix in SF34GH signify?
The "H" suffix in SF34GH explicitly denotes AEC-Q101 qualification - meaning the device has passed accelerated stress tests including temperature cycling, high-temperature reverse bias (HTRB), and unbiased highly accelerated stress test (uHAST). This distinguishes SF34GH from standard SF34G, which lacks automotive qualification documentation.
Can SF34GH be used in surface-mount designs?
No - SF34GH is supplied in axial-leaded DO-201AD package and is not compatible with SMT reflow processes. It requires through-hole mounting with lead forming and wave or selective soldering. For SMT equivalents, consider TSC's SOD-123W-packaged SFR320H or similar AEC-Q101-qualified surface-mount super fast rectifiers.
SF34GH 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):
- 200 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 @ 200 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
SF34GH FAQ
1.How can I place an order for SF34GH through Aetrix?
Please submit a Request for Quotation (RFQ) for SF34GH 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 SF34GH reliable?
The price and inventory of SF34GH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF34GH is usually 5 days.
3.What payment methods are accepted for SF34GH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF34GH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SF34GH?
SF34GH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SF34GH 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 SF34GH?
For technical support, including SF34GH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF34GH requirements.
6.How does Aetrix verify that SF34GH is sourced from the original manufacturer or authorized distributors?
All SF34GH 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 SF34GH meets industry standards.
7.What is the process for return or replacement of SF34GH?
All SF34GH units undergo pre-shipment inspection (PSI). If there is an issue with SF34GH, 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 SF34GH part is unused and in its original packaging.
Return procedure for SF34GH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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