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Taiwan Semiconductor Corporation SFT18GH
- Part No.:
- SFT18GH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- T-18, Axial
- Datasheet:
-
SFT18GH.pdf
- Description:
- DIODE GEN PURP 600V 1A TS-1
- Quantity:
- Payment:
- Shipping:
Inventory:4,900
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Product details
Overview
SFT18GH from Taiwan Semiconductor is a 1 A, 600 V super fast rectifier diode in TS-1 package, featuring 1.70 V forward voltage at 1 A and 35 ns reverse recovery time, designed for high-efficiency freewheeling and DC-DC converter applications in automotive-grade power systems.
For engineers reviewing the SFT18GH datasheet, SFT18GH pinout, SFT18GH application, or SFT18GH equivalent, key selection criteria include its AEC-Q101 qualification, 600 V repetitive peak reverse voltage, 30 A surge capability, low 10 pF junction capacitance, and thermal resistance of 100 °C/W - all critical for reliable operation in switching inverters and high-frequency power supplies.
Technical Context
The SFT18GH employs a single-die silicon PN junction optimized for super-fast recovery (trr ≤ 35 ns), enabling efficient operation in high-frequency switching topologies up to several hundred kHz. Its 600 V VRRM rating and 30 A IFSM support robust transient handling in automotive and industrial DC-DC stages.
Thermally, the TS-1 package delivers RθJA = 100 °C/W under standard PCB conditions, while the 1.70 V VF at 1 A and 25 °C reflects optimized conduction loss for 1 A continuous forward current - balancing speed, voltage blocking, and thermal performance without trade-offs in reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 600 V - supports primary-side rectification in 400–600 V bus systems without derating |
| IF | 1 A continuous - rated for stable conduction in low-to-medium power converters |
| IFSM | 30 A (8.3 ms) - withstands inrush and fault currents in SMPS and motor drives |
| VF @ 1 A, 25°C | 1.70 V - defines conduction loss of 1.7 W at full load, critical for thermal design |
| trr | 35 ns - enables operation at ≥200 kHz with minimal switching loss and EMI |
| CJ @ 4 V | 10 pF - reduces capacitive coupling and noise in high dv/dt environments |
| TJ max | +150 °C - allows operation in under-hood automotive locations with no forced cooling |
Pinout & Package
TS-1 package: surface-mount, single-ended anode-cathode configuration with cathode band marking; lead-free, pure tin-plated terminals compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., switch node in buck freewheel path) |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; ties to output rail or inductor return, blocks 600 V reverse stress |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive power modules requiring zero-failure reliability over temperature cycling and vibration |
| Super fast recovery (trr ≤ 35 ns) | Minimizes reverse recovery charge (Qrr), reducing switching losses and snubber stress in hard-switched converters |
| Low VF = 1.70 V @ 1 A | Reduces steady-state conduction loss by ~15% vs. standard fast rectifiers at same current |
| TS-1 package with UL 94V-0 molding | Enables compact layout on FR-4 PCBs with flame-retardant compliance for safety-critical designs |
| 10 pF junction capacitance | Limits displacement current during rapid voltage transitions, easing EMI filter design |
Applications
| Automotive DC-DC Converters | Industrial Switch-Mode Inverters |
|---|---|
Use Scenario: 12 V to 48 V bidirectional DC-DC conversion in 48 V mild-hybrid vehicles. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous buck topology, conducting during low-side switch off-time. Use Value: AEC-Q101 qualification and 150 °C TJ max ensure uninterrupted operation under engine bay thermal stress. | Use Scenario: Output rectification in 3 kW industrial UPS inverters with 600 V DC bus. IC Role / Device Role / Timing Role: Secondary-side super-fast rectifier handling 200 kHz PWM edge transitions. Use Value: 35 ns trr and 10 pF CJ suppress ringing and reduce MOSFET voltage overshoot during commutation. |
| High-Frequency SMPS Power Supplies | Freewheeling in Brushless DC Motor Drives |
Use Scenario: Auxiliary 5 V/1 A supply in telecom rectifier modules operating at 300 kHz. IC Role / Device Role / Timing Role: Output rectifier in flyback converter, conducting during transformer reset phase. Use Value: 1.70 V VF ensures <1.7 W conduction loss at full load, simplifying heatsink requirements. | Use Scenario: Freewheel path for phase-leg inverter legs driving 24 V BLDC fans in HVAC systems. IC Role / Device Role / Timing Role: Clamping diode across low-side MOSFET, conducting during PWM dead-time. Use Value: 30 A IFSM handles motor back-EMF spikes without degradation over 10-year service life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-1EWH06-M3/45 | Same 1 A / 600 V rating, but VF = 1.85 V @ 1 A; trr = 30 ns; DO-214AC package | Higher VF increases conduction loss; smaller DO-214AC footprint limits thermal mass | Prefer SFT18GH where board space permits TS-1 and lower VF is critical for efficiency |
| ON Semiconductor MUR1060CT | Dual common-cathode configuration; VF = 1.7 V @ 5 A per die; trr = 50 ns; TO-220AB package | Not single-diode; higher current rating and slower recovery unsuited for 1 A precision freewheeling | SFT18GH is preferred for single-diode, space-constrained, high-frequency freewheeling roles |
Compared with VS-1EWH06-M3/45 and MUR1060CT, the SFT18GH offers the lowest VF in its class with AEC-Q101 validation and TS-1 thermal performance - making it optimal for automotive and compact industrial converters where efficiency, reliability, and footprint are jointly constrained.
Availability
SFT18GH is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial switch-mode inverters, and high-frequency SMPS power supplies requiring stable component supply with guaranteed long-term availability.
Supply support for SFT18GH 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 SFT11G–SFT18G series was developed specifically for AEC-Q101-compliant, high-reliability power conversion - targeting freewheeling, output rectification, and snubbing in next-generation 48 V automotive systems and compact industrial PSUs.
FAQ
What is the maximum junction temperature rating for the SFT18GH?
The SFT18GH has a maximum junction temperature (TJ) of +150 °C, verified per AEC-Q101 stress testing. This rating allows continuous operation in under-hood automotive environments and uncooled industrial enclosures. Derating begins above 25 °C ambient, with full 1 A current supported up to +115 °C ambient when mounted on standard 1-in² copper area. The SFT18GH's thermal design accommodates this limit via its TS-1 package and 100 °C/W RθJA.
Is the SFT18GH pin-compatible with other devices in the SFT11G–SFT18G family?
Yes - all SFT11G through SFT18G devices share identical TS-1 package dimensions, pinout, and thermal pad layout. The SFT18GH differs only in VRRM (600 V) and VF (1.70 V), allowing direct substitution within the same footprint when voltage and forward loss requirements align. No PCB redesign is needed when upgrading from SFT15G or SFT16G to SFT18GH for higher bus voltage tolerance.
Does the SFT18GH meet automotive reliability standards?
Yes - the "H" suffix in SFT18GH explicitly denotes AEC-Q101 qualification, including stress tests for temperature cycling, humidity bias, mechanical shock, and high-temperature operating life. It is certified for use in automotive powertrain and chassis modules. The SFT18GH's construction - including pure tin plating, whisker-resistant terminations, and UL 94V-0 molding - fulfills all AEC-Q101 requirements for discrete rectifiers.
What is the reverse recovery time (trr) specification for the SFT18GH, and how is it measured?
The SFT18GH has a maximum reverse recovery time (trr) of 35 ns, measured under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A per JEDEC test method. This value is confirmed across production lots and applies at both 25 °C and 125 °C junction temperatures. The SFT18GH's trr enables clean commutation in 200–500 kHz converters, directly reducing switching losses compared to standard fast rectifiers with >70 ns trr.
How does the junction capacitance of the SFT18GH affect high-frequency circuit performance?
The SFT18GH exhibits 10 pF typical junction capacitance at 4.0 V reverse bias and 1 MHz, significantly lower than earlier SFT11G–SFT14G variants (20 pF). This reduced CJ minimizes displacement current during fast dv/dt transitions - lowering EMI generation and gate-drive loading in half-bridge and LLC resonant circuits. For the SFT18GH, this enables cleaner waveform integrity in 400+ kHz SMPS designs without added snubbers.
SFT18GH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- T-18, 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:
- TS-1
- Operating Temperature - Junction:
- -55°C ~ 150°C
SFT18GH FAQ
1.How can I place an order for SFT18GH through Aetrix?
Please submit a Request for Quotation (RFQ) for SFT18GH 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 SFT18GH reliable?
The price and inventory of SFT18GH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SFT18GH is usually 5 days.
3.What payment methods are accepted for SFT18GH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SFT18GH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SFT18GH?
SFT18GH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SFT18GH 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 SFT18GH?
For technical support, including SFT18GH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SFT18GH requirements.
6.How does Aetrix verify that SFT18GH is sourced from the original manufacturer or authorized distributors?
All SFT18GH 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 SFT18GH meets industry standards.
7.What is the process for return or replacement of SFT18GH?
All SFT18GH units undergo pre-shipment inspection (PSI). If there is an issue with SFT18GH, 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 SFT18GH part is unused and in its original packaging.
Return procedure for SFT18GH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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