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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Taiwan Semiconductor Corporation SFT15GHA1G

Name: SFT15GHA1G
Brand: Taiwan Semiconductor Corporation
SKU: SFT15GHA1G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SFT15GHA1G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: T-18, Axial

Datasheet:: SFT15GHA1G.pdf

Description:: DIODE GEN PURP 300V 1A TS-1

Quantity:: RFQ Add To RFQ list

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Product details

Overview

SFT15GHA1G from Taiwan Semiconductor is a 400V, 1A AEC-Q101-qualified super fast rectifier diode in TS-1 package, featuring 1.30V forward voltage at 1A/25°C, 35ns reverse recovery time, and 10pF junction capacitance - deployed in automotive DC-DC converters and freewheeling paths where low switching loss and high surge robustness are required.

For engineers reviewing the SFT15GHA1G datasheet, SFT15GHA1G pinout, SFT15GHA1G application, or SFT15GHA1G equivalent, key selection criteria include V_RRM = 400V, I_F = 1A, t_rr = 35ns, thermal resistance R_θJA = 100°C/W, and AEC-Q101 qualification for under-hood power conversion.

Technical Context

This super fast rectifier uses a single-die planar structure optimized for low Q_rr and minimal tail current, enabling efficient operation in high-frequency switching topologies up to several hundred kHz. Its 400V V_RRM, 30A I_FSM (8.3ms), and 150°C T_JMAX support transient-heavy automotive environments.

The TS-1 package provides pure tin-plated leads compliant with J-STD-002, UL 94V-0 molding compound, and JESD201 Class 2 whisker resistance - ensuring solderability and long-term reliability in reflow and wave processes.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	400 V - maximum repetitive reverse voltage before breakdown; sets upper limit for blocking capability in flyback/freewheeling stages
I_F	1 A - continuous average forward current; defines steady-state conduction rating at T_A = 25°C with derating above 25°C
t_rr	35 ns - reverse recovery time at I_F = 0.5A, I_R = 1.0A, I_rr = 0.25A; critical for minimizing switching loss in SMPS >100kHz
V_F	1.30 V - forward voltage drop at I_F = 1A, T_J = 25°C; directly impacts conduction loss and thermal rise in compact layouts
C_J	10 pF - junction capacitance at 1MHz, V_R = 4.0V; low value reduces capacitive turn-on loss and EMI in high-dV/dt circuits
R_θJA	100 °C/W - junction-to-ambient thermal resistance; determines temperature rise under 1A DC load on standard PCB pad
I_FSM	30 A - non-repetitive surge current (8.3ms half-sine); supports inrush and fault-current handling in automotive 12V systems

Pinout & Package

TS-1 package: surface-mount, single-anode/single-cathode configuration with cathode band marking; lead-free, RoHS-compliant, halogen-free molding compound meeting UL 94V-0.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential node (e.g., switch node in buck freewheel path); must handle full I_F and I_FSM
Cathode	Forward current exit / reverse blocking terminal	Connected to higher-potential rail (e.g., output capacitor positive); polarity marked by visible band; withstands full V_RRM

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive applications including engine control, body electronics, and ADAS power supplies
Super fast recovery (t_rr = 35ns)	Reduces switching losses and EMI vs. standard fast rectifiers in 200–500kHz DC-DC designs
Low V_F (1.30V @ 1A)	Lowers conduction loss by ~15% compared to 1.5V-class rectifiers at same current, easing thermal design
TS-1 package with pure tin leads	Enables lead-free reflow assembly without voiding or dewetting; meets J-STD-002 solderability requirements
10pF junction capacitance	Minimizes displacement current during high-dV/dt switching, reducing gate drive loading and noise coupling

Applications

Automotive DC-DC Converters	On-Board Charger (OBC) Auxiliary Supplies
Use Scenario: 12V/48V bidirectional DC-DC converter in mild-hybrid vehicles converting battery energy for infotainment and ADAS ECUs. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous rectified buck-boost stage, conducting during low-side switch off-time. Use Value: 35ns t_rr and 400V V_RRM prevent cross-conduction loss and ensure safe blocking during 400V bus transients.	Use Scenario: Auxiliary 12V supply derived from high-voltage OBC input stage to power control logic and isolation drivers. IC Role / Device Role / Timing Role: Output rectifier in flyback or forward converter powering isolated gate drivers and microcontrollers. Use Value: 1.30V V_F minimizes dropout and thermal stress at 1A load, while AEC-Q101 ensures lifetime reliability across temperature cycling.
Industrial Motor Drive Gate Supply	Server PSU Hold-Up Circuits
Use Scenario: Isolated auxiliary supply for IGBT/SiC gate drivers in HVAC and pump inverters operating at ambient up to 85°C. IC Role / Device Role / Timing Role: Secondary-side rectifier delivering stable 15V/1A to driver ICs; subjected to repeated surge events during motor stall. Use Value: 30A I_FSM withstands startup surges; 150°C T_JMAX and 100°C/W R_θJA allow operation without heatsink in constrained spaces.	Use Scenario: Freewheeling path in hold-up capacitor charging circuit of 1U server PSUs, maintaining 12V rail during AC dropout. IC Role / Device Role / Timing Role: Fast-recovery path paralleling MOSFET in active clamp or passive snubber network during line interruption. Use Value: Low C_J (10pF) prevents parasitic oscillation during rapid voltage reversal; RoHS/halogen-free compliance meets datacenter environmental standards.

Automotive DC-DC Converters

On-Board Charger (OBC) Auxiliary Supplies

Use Scenario: 12V/48V bidirectional DC-DC converter in mild-hybrid vehicles converting battery energy for infotainment and ADAS ECUs.

IC Role / Device Role / Timing Role: Freewheeling diode in synchronous rectified buck-boost stage, conducting during low-side switch off-time.

Use Value: 35ns t_rr and 400V V_RRM prevent cross-conduction loss and ensure safe blocking during 400V bus transients.

Use Scenario: Auxiliary 12V supply derived from high-voltage OBC input stage to power control logic and isolation drivers.

IC Role / Device Role / Timing Role: Output rectifier in flyback or forward converter powering isolated gate drivers and microcontrollers.

Use Value: 1.30V V_F minimizes dropout and thermal stress at 1A load, while AEC-Q101 ensures lifetime reliability across temperature cycling.

Industrial Motor Drive Gate Supply

Server PSU Hold-Up Circuits

Use Scenario: Isolated auxiliary supply for IGBT/SiC gate drivers in HVAC and pump inverters operating at ambient up to 85°C.

IC Role / Device Role / Timing Role: Secondary-side rectifier delivering stable 15V/1A to driver ICs; subjected to repeated surge events during motor stall.

Use Value: 30A I_FSM withstands startup surges; 150°C T_JMAX and 100°C/W R_θJA allow operation without heatsink in constrained spaces.

Use Scenario: Freewheeling path in hold-up capacitor charging circuit of 1U server PSUs, maintaining 12V rail during AC dropout.

IC Role / Device Role / Timing Role: Fast-recovery path paralleling MOSFET in active clamp or passive snubber network during line interruption.

Use Value: Low C_J (10pF) prevents parasitic oscillation during rapid voltage reversal; RoHS/halogen-free compliance meets datacenter environmental standards.

Equivalent & Alternatives

The following parts are listed as comparable options for similar super fast rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1L06S	V_RRM = 600V, t_rr = 30ns, V_F = 1.15V @ 1A, TO-277A package	Higher voltage margin and faster recovery, but larger footprint and no AEC-Q101 certification	Preferred where 600V blocking or <30ns t_rr is mandatory; requires layout change due to TO-277A outline
ON Semi MUR105G	V_RRM = 50V, t_rr = 35ns, V_F = 0.95V @ 1A, DO-41 package	Lower V_RRM, axial leaded, no AEC-Q101, higher V_F at elevated temperature	Only suitable for low-voltage (<60V), non-automotive, through-hole designs; not drop-in replaceable

Compared with STTH1L06S and MUR105G, SFT15GHA1G uniquely combines 400V rating, AEC-Q101 qualification, TS-1 surface-mount compatibility, and balanced V_F/t_rr for cost-sensitive automotive power modules requiring zero requalification effort.

Availability

SFT15GHA1G is available at Aetrix Electronics and suitable for automotive power conversion, industrial motor drives, and server auxiliary supplies requiring stable component supply, AEC-Q101 compliance, and consistent TS-1 packaging.

Supply support for SFT15GHA1G 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 SFT1xG series targets high-reliability power conversion in harsh environments, with design focus on fast recovery, low loss, and automotive-grade qualification - specifically addressing needs in engine control units, ADAS power rails, and EV auxiliary systems.

FAQ

What is the peak repetitive reverse voltage rating for SFT15GHA1G?

The SFT15GHA1G has a peak repetitive reverse voltage (V_RRM) rating of 400 V. This value is confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version J2104), where SFT15G is explicitly assigned 400 V under the V_RRM column. It defines the maximum DC or sinusoidal AC reverse voltage the device can block continuously without breakdown.

Is SFT15GHA1G qualified to AEC-Q101, and what does the 'H' suffix indicate?

Yes, SFT15GHA1G is AEC-Q101 qualified. The 'H' in the ordering code (SFT15GHA1G) explicitly denotes AEC-Q101 qualification per Taiwan Semiconductor's Ordering Information table. This means the device has passed stress tests for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - making it suitable for under-hood and safety-critical power applications.

What is the forward voltage drop of SFT15GHA1G at rated current and room temperature?

The forward voltage (V_F) of SFT15GHA1G is 1.30 V at I_F = 1 A and T_J = 25°C, as specified in the Electrical Specifications table for SFT15G–SFT16G group. This value is measured under pulsed conditions (PW = 0.3 ms) and represents the conduction loss baseline used for thermal and efficiency calculations in DC-DC designs.

Does SFT15GHA1G have a specified reverse recovery time, and how is it tested?

Yes, SFT15GHA1G has a maximum reverse recovery time (t_rr) of 35 ns. Per the datasheet, this is measured under conditions: I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A, using the test circuit shown in Figure 6. The value applies to the entire SFT15G–SFT18G group and reflects performance in high-frequency switching applications such as automotive DC-DC converters.

What package type and mounting method does SFT15GHA1G use?

SFT15GHA1G uses the TS-1 surface-mount package - a compact, gull-wing leaded outline with pure tin-plated terminals. It is designed for reflow soldering per J-STD-002 and features UL 94V-0 flammability-rated molding compound. The cathode is marked by a visible band, and polarity must be observed during placement to ensure correct circuit operation.

SFT15GHA1G 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):: 300 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 1.3 V @ 1 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: 35 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 300 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

SFT15GHA1G FAQ

1.How can I place an order for SFT15GHA1G through Aetrix?

Please submit a Request for Quotation (RFQ) for SFT15GHA1G 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 SFT15GHA1G reliable?

The price and inventory of SFT15GHA1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SFT15GHA1G is usually 5 days.

3.What payment methods are accepted for SFT15GHA1G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SFT15GHA1G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SFT15GHA1G?

SFT15GHA1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SFT15GHA1G 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 SFT15GHA1G?

For technical support, including SFT15GHA1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SFT15GHA1G requirements.

6.How does Aetrix verify that SFT15GHA1G is sourced from the original manufacturer or authorized distributors?

All SFT15GHA1G 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 SFT15GHA1G meets industry standards.

7.What is the process for return or replacement of SFT15GHA1G?

All SFT15GHA1G units undergo pre-shipment inspection (PSI). If there is an issue with SFT15GHA1G, 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 SFT15GHA1G part is unused and in its original packaging.

Return procedure for SFT15GHA1G:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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