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Taiwan Semiconductor Corporation SF18GH
- Part No.:
- SF18GH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
SF18GH.pdf
- Description:
- DIODE GEN PURP 600V 1A DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:4,986
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Product details
Overview
SF18GH from Taiwan Semiconductor is a 1 A, 600 V super fast recovery rectifier diode in DO-204AL (DO-41) package, featuring 1.70 V max forward voltage at 1 A and 35 ns reverse recovery time, designed for high-efficiency DC-DC converters and switching inverters in automotive-grade power supplies.
For engineers reviewing the SF18GH datasheet, SF18GH pinout, SF18GH application, or SF18GH equivalent, key selection criteria include its AEC-Q101 qualification, 600 V repetitive peak reverse voltage, 30 A surge rating, 150 °C maximum junction temperature, and low 10 pF junction capacitance at 1 MHz under 4 V reverse bias.
Technical Context
This single-die silicon rectifier uses optimized epitaxial structure to achieve super-fast switching with controlled minority-carrier lifetime, enabling low conduction loss and minimal reverse recovery charge. Its 35 ns trr and 1.70 V VF at 1 A support high-frequency operation up to 100 kHz in hard-switched topologies.
The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements, with pure tin-plated leads compliant to J-STD-002. Polarity is marked by cathode band; thermal resistance is 20 °C/W junction-to-lead and 80 °C/W junction-to-ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 600 V - supports input stages of 400 VAC rectification or 300 VDC bus protection |
| IF | 1 A continuous - suitable for low-to-medium power SMPS outputs up to ~15 W |
| IFSM | 30 A (8.3 ms) - withstands inrush currents in offline adapters and motor drive freewheel paths |
| VF @ 1 A | 1.70 V max - limits conduction loss to ≤1.7 W at full rated current |
| trr | 35 ns - enables efficient operation in 50–100 kHz switch-mode converters |
| CJ @ 1 MHz | 10 pF - reduces capacitive coupling noise in high dv/dt gate-drive or snubber circuits |
| TJ max | 150 °C - allows operation in under-hood automotive environments without derating below 1 A |
Pinout & Package
DO-204AL (DO-41) axial-leaded package with cathode indicated by a painted band; lead finish is pure tin, solderable per J-STD-002; weight ≈0.350 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to lower-potential side (e.g., switch node or ground return) |
| Cathode | Current exit point during forward conduction; polarity marker band | Connected to higher-potential rail (e.g., output capacitor positive or VBUS) |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive power electronics requiring stress-tested reliability over temperature and life cycles |
| Super fast recovery (trr ≤ 35 ns) | Minimizes switching loss and EMI generation in high-frequency flyback and forward converters |
| Low VF = 1.70 V max @ 1 A | Reduces thermal load on PCB layout and eliminates need for heatsinking in <1 A applications |
| RoHS + halogen-free | Complies with IEC 61249-2-21 and automotive ELV directive for sustainable manufacturing |
| Junction-to-lead RθJL = 20 °C/W | Enables direct thermal path to copper pour or chassis for passive cooling in space-constrained modules |
Applications
| Automotive DC-DC Converter | Industrial Switch-Mode Inverter |
|---|---|
Use Scenario: 12 V to 48 V bidirectional converter in 48 V mild-hybrid vehicle architecture. IC Role / Device Role / Timing Role: Output rectifier in synchronous or asynchronous buck-boost stage handling 1 A continuous load. Use Value: AEC-Q101 qualification ensures compliance with automotive environmental stress testing; 600 V VRRM provides margin against load-dump transients. | Use Scenario: Auxiliary power supply in PLC motor drive cabinet supplying control logic and gate drivers. IC Role / Device Role / Timing Role: Freewheeling diode across IGBT collector-emitter during turn-off commutation. Use Value: 35 ns trr prevents cross-conduction losses; 30 A IFSM absorbs inductive kickback energy without failure. |
| LED Driver Secondary Rectification | UPS Battery Charging Stage |
Use Scenario: Constant-current LED driver for street lighting operating from 277 VAC mains. IC Role / Device Role / Timing Role: Output rectifier in flyback transformer secondary winding. Use Value: 10 pF junction capacitance minimizes high-frequency ringing; 150 °C TJ max supports sealed outdoor enclosure operation. | Use Scenario: AC/DC front-end rectification in line-interactive UPS charging circuit. IC Role / Device Role / Timing Role: Input bridge leg rectifier handling 1 A average charging current. Use Value: 1.70 V VF ensures <1.7 W conduction loss at full load; DO-41 package allows through-hole mounting on high-reliability industrial PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R06U | Same 1 A / 600 V rating; VF = 1.7 V typ (not max); trr = 30 ns; TO-220AC package | Requires heatsink above ~0.5 A; unsuitable for space-constrained DO-41 layouts | Select when higher surge robustness and thermal mass are needed over board-level compactness |
| ON Semi MUR160 | 1 A / 600 V; VF = 1.7 V max; trr = 50 ns; same DO-41 package; no AEC-Q101 qualification | Lacks automotive qualification; higher trr increases switching loss in >50 kHz designs | Select for cost-sensitive industrial applications where AEC-Q101 is not mandated |
Compared with STTH1R06U and MUR160, SF18GH uniquely combines AEC-Q101 qualification, DO-41 form factor, and guaranteed 35 ns trr-making it optimal for automotive auxiliary supplies and compact industrial converters where reliability, size, and speed must coexist.
Availability
SF18GH is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial switch-mode inverters, and LED driver secondary rectification requiring stable component supply with long-term lifecycle assurance.
Supply support for SF18GH 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 automotive, industrial, and consumer markets since 1979.
The SF1xG series was developed specifically for high-reliability, high-frequency rectification in automotive power systems and industrial switching supplies-emphasizing AEC-Q101 compliance, tight parametric distribution, and robust thermal performance in legacy through-hole packages.
FAQ
What is the maximum junction temperature rating for SF18GH?
The SF18GH has a maximum junction temperature (TJ max) of +150 °C, verified per AEC-Q101 stress testing. This rating allows uninterrupted 1 A operation in ambient temperatures up to +105 °C when mounted on standard FR-4 PCB with 1-inch² copper pour, making SF18GH suitable for under-hood automotive modules and enclosed industrial power supplies.
Is SF18GH pin-compatible with other SF1xG variants like SF15GH or SF16GH?
Yes, all SF1xGH devices-including SF18GH-share identical DO-204AL (DO-41) package dimensions, lead spacing, and cathode band marking. They are mechanically interchangeable; however, electrical differences exist: SF18GH has 600 V VRRM and 1.70 V VF max, while SF15GH is rated at 300 V and 1.30 V VF max. System-level voltage margin must be re-verified when substituting.
Does SF18GH meet automotive qualification standards?
Yes, SF18GH is explicitly AEC-Q101 qualified, as confirmed in the ordering code suffix "H" and documented in Taiwan Semiconductor's H2104 revision datasheet. It passes temperature cycling, high-temperature operating life, and mechanical shock tests required for automotive power semiconductor applications.
What is the reverse recovery time (trr) specification for SF18GH?
The SF18GH has a maximum reverse recovery time (trr) of 35 ns, measured at IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This value is guaranteed across the full operating temperature range and enables efficient use in switching power supplies operating up to 100 kHz without excessive switching loss or EMI.
Can SF18GH be used as a freewheeling diode in IGBT-based motor drives?
Yes, SF18GH is well-suited as a freewheeling diode in IGBT-based motor drives due to its 30 A non-repetitive surge rating (IFSM), 35 ns trr, and 600 V VRRM-providing sufficient voltage margin against inductive kickback. Its DO-41 package allows direct mounting near IGBT modules on industrial PCBs without thermal interface complications.
SF18GH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 600 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1.7 V @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 600 V
- Capacitance @ Vr, F:
- 10pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SF18GH FAQ
1.How can I place an order for SF18GH through Aetrix?
Please submit a Request for Quotation (RFQ) for SF18GH 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 SF18GH reliable?
The price and inventory of SF18GH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF18GH is usually 5 days.
3.What payment methods are accepted for SF18GH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF18GH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SF18GH?
SF18GH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SF18GH 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 SF18GH?
For technical support, including SF18GH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF18GH requirements.
6.How does Aetrix verify that SF18GH is sourced from the original manufacturer or authorized distributors?
All SF18GH 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 SF18GH meets industry standards.
7.What is the process for return or replacement of SF18GH?
All SF18GH units undergo pre-shipment inspection (PSI). If there is an issue with SF18GH, 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 SF18GH part is unused and in its original packaging.
Return procedure for SF18GH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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