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Taiwan Semiconductor Corporation SFT18GHA1G
- Part No.:
- SFT18GHA1G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- T-18, Axial
- Datasheet:
-
SFT18GHA1G.pdf
- Description:
- DIODE GEN PURP 600V 1A TS-1
- Quantity:
- Payment:
- Shipping:
Inventory:6,211
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Product details
Overview
SFT18GHA1G 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 25 °C, 35 ns reverse recovery time, 10 pF junction capacitance at 1 MHz/4 V, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SFT18GHA1G datasheet, SFT18GHA1G pinout, SFT18GHA1G application, or SFT18GHA1G equivalent, key selection criteria include peak reverse voltage rating, VF vs. TJ trade-off, trr-dependent switching loss in high-frequency DC-DC converters, and TS-1 thermal resistance (100 °C/W) for board-level thermal design.
Technical Context
This device operates as a single-die, unidirectional super fast recovery rectifier optimized for high-efficiency switching power supplies. Its 600 V VRRM rating supports 400 V AC input bridge configurations, while the 35 ns trr enables operation up to ~500 kHz without excessive switching loss.
The TS-1 package provides surface-mount compatibility with pure tin-plated leads (J-STD-002 compliant), UL 94V-0 molding compound, and JESD201 Class 2 whisker resistance - critical for automotive under-hood environments where thermal cycling and vibration stress are present.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 600 V - supports 400 V RMS AC input rectification with 50 % safety margin |
| IF | 1 A continuous - suitable for low-to-medium power DC-DC stages (e.g., 12 V/1 A output) |
| VF @ 1 A, 25 °C | 1.70 V - contributes ~1.7 W conduction loss at full load; impacts thermal design in confined layouts |
| trr | 35 ns - enables efficient operation in 200–500 kHz SMPS without significant tail current loss |
| CJ @ 1 MHz, 4 V | 10 pF - limits capacitive coupling noise in high dv/dt gate-drive or feedback paths |
| RθJA | 100 °C/W - requires ≥ 100 mm² copper pour for safe 1 A operation at 70 °C ambient |
| IFSM (8.3 ms) | 30 A - withstands inrush currents during cold-start of buck-derived converters |
Pinout & Package
TS-1 package: surface-mount, single-anode/single-cathode configuration with cathode band marking; lead-free, RoHS-compliant, halogen-free molding compound (IEC 61249-2-21); weight ≈ 0.200 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential node (e.g., switch node in synchronous buck freewheel path) |
| Cathode | Current exit terminal during forward conduction; marked by band | Connected to output rail or inductor node; polarity must be verified before PCB layout |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive temperature cycling (-55 °C to +150 °C), mechanical shock, and humidity exposure per JESD47 |
| Super fast recovery (trr = 35 ns) | Reduces reverse recovery charge (Qrr) to < 10 nC, minimizing EMI and cross-conduction risk in hard-switched topologies |
| Low VF at high TJ | VF increases only modestly with junction temperature - maintains efficiency stability across operating range |
| TS-1 package with tin plating | Enables reflow soldering compatibility and eliminates post-solder cleaning; meets J-STD-002 wetting requirements |
| Junction temperature limit | 150 °C max - allows operation in engine-control or ADAS modules with limited heatsinking |
Applications
| Automotive DC-DC Converter | Industrial SMPS Freewheel Diode |
|---|---|
Use Scenario: 12 V → 5 V/1 A buck converter in body control module with 400 kHz switching frequency. IC Role / Device Role / Timing Role: Freewheeling diode providing current path during high-side MOSFET off-time; critical for maintaining continuous inductor current. Use Value: 35 ns trr minimizes reverse recovery loss, enabling >92 % efficiency at full load and reducing EMI filtering burden. | Use Scenario: Output rectification in 24 V input, 12 V/1 A industrial isolated flyback supply. IC Role / Device Role / Timing Role: Secondary-side unidirectional current valve; handles repetitive 1 A forward current and 600 V blocking during transformer reset. Use Value: 600 V VRRM ensures margin against reflected transients; 100 °C/W RθJA permits use on standard FR4 without thermal vias. |
| On-Board Charger Auxiliary Supply | LED Driver Flyback Snubber Diode |
Use Scenario: Auxiliary 15 V bias supply derived from OBC primary-side auxiliary winding. IC Role / Device Role / Timing Role: Rectifier for low-power auxiliary rail; subjected to intermittent loading and wide ambient temperature swings. Use Value: AEC-Q101 qualification guarantees reliability over 15-year vehicle lifetime; -55 °C to +150 °C TSTG supports under-hood placement. | Use Scenario: Snubber clamp diode in 48 V LED driver flyback with 300 kHz switching. IC Role / Device Role / Timing Role: Fast-recovery path for snubber capacitor discharge; must absorb energy without oscillation or latch-up. Use Value: Low CJ (10 pF) prevents resonant ringing with snubber R-C network; 30 A IFSM tolerates surge events during lamp short-circuit. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R06S | Same 1 A / 600 V rating; VF = 1.7 V @ 1 A, trr = 35 ns; TO-277A package (larger footprint, higher RθJA) | Requires PCB redesign due to different outline and thermal pad; not drop-in compatible | Select if existing layout accommodates TO-277A and higher thermal mass is acceptable |
| ON Semi MUR160 | 1 A / 600 V; VF = 1.7 V @ 1 A, trr = 50 ns; DO-41 through-hole package | Not surface-mount; incompatible with automated SMT assembly; higher trr increases switching loss | Consider only for legacy through-hole designs or prototyping where reflow is unavailable |
Compared with STTH1R06S and MUR160, SFT18GHA1G offers identical electrical performance in a smaller, automotive-qualified TS-1 package with superior manufacturability and thermal performance per unit area - making it optimal for space-constrained, high-reliability SMT power stages.
Availability
SFT18GHA1G is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial switching mode power supplies, and LED driver freewheeling circuits requiring stable component supply and AEC-Q101 compliance.
Supply support for SFT18GHA1G 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 diodes, and MOSFETs for industrial and automotive markets.
SFT11G–SFT18G is part of TSC's AEC-Q101-qualified super fast rectifier family designed specifically for high-frequency, high-reliability power conversion in automotive body electronics and industrial SMPS where low VF, fast trr, and robust thermal performance are essential.
FAQ
What is the maximum junction temperature rating for SFT18GHA1G?
The SFT18GHA1G has a maximum junction temperature (TJ MAX) of +150 °C, validated per AEC-Q101 stress testing. This allows reliable operation in under-hood automotive environments and industrial enclosures where ambient temperatures reach 70–85 °C, provided board-level thermal design maintains junction rise within limits. The 100 °C/W RθJA value defines the required thermal interface between die and ambient.
Is SFT18GHA1G pin-compatible with other SFTxxG variants?
No - all SFT11G–SFT18G devices share the same TS-1 package and pinout (anode/cathode), but SFT18GHA1G is distinguished by its "H" suffix indicating AEC-Q101 qualification and "A1G" denoting tape-and-reel packaging with green compound. Electrical parameters (e.g., VRRM = 600 V, VF = 1.70 V) are specific to SFT18GHA1G; substituting lower-voltage variants like SFT11G would violate reverse voltage requirements.
Does SFT18GHA1G require a heatsink in typical 1 A applications?
In most 1 A continuous applications with moderate ambient temperature (< 60 °C), SFT18GHA1G does not require an external heatsink when mounted on ≥ 100 mm² of 1 oz copper. Its 100 °C/W RθJA means a 1.7 W conduction loss (at VF = 1.7 V) results in ~170 °C junction rise above ambient - so PCB copper area and airflow must be sized accordingly. Thermal simulation is recommended for enclosed or high-ambient deployments.
What does the "A1G" suffix mean in SFT18GHA1G?
The "A1G" suffix in SFT18GHA1G indicates green (halogen-free) molding compound per IEC 61249-2-21 and tape-and-reel packaging (5,000 pcs/reel). The "H" confirms AEC-Q101 qualification. This distinguishes it from base SFT18G (no qualification) and SFT18G A0G (ammo box packaging). All variants retain identical electrical specs and TS-1 mechanical form factor.
How does the 35 ns reverse recovery time of SFT18GHA1G impact EMI in switching converters?
The 35 ns trr of SFT18GHA1G reduces reverse recovery charge (Qrr) to approximately 8–10 nC, limiting high-frequency current spikes during turn-off. This directly lowers broadband EMI generation in the 30–300 MHz range, easing compliance with CISPR 25 Class 5 in automotive systems. Compared to standard fast rectifiers (trr > 75 ns), SFT18GHA1G cuts peak dv/dt-induced noise by >6 dB in typical 400 kHz buck converters.
SFT18GHA1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Tape & Box (TB)
- Product Status:
- Discontinued at Digi-Key
- 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
SFT18GHA1G FAQ
1.How can I place an order for SFT18GHA1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SFT18GHA1G 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 SFT18GHA1G reliable?
The price and inventory of SFT18GHA1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SFT18GHA1G is usually 5 days.
3.What payment methods are accepted for SFT18GHA1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SFT18GHA1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SFT18GHA1G?
SFT18GHA1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SFT18GHA1G 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 SFT18GHA1G?
For technical support, including SFT18GHA1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SFT18GHA1G requirements.
6.How does Aetrix verify that SFT18GHA1G is sourced from the original manufacturer or authorized distributors?
All SFT18GHA1G 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 SFT18GHA1G meets industry standards.
7.What is the process for return or replacement of SFT18GHA1G?
All SFT18GHA1G units undergo pre-shipment inspection (PSI). If there is an issue with SFT18GHA1G, 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 SFT18GHA1G part is unused and in its original packaging.
Return procedure for SFT18GHA1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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