My Inquiry
My Account
Taiwan Semiconductor Corporation SF46GH
- Part No.:
- SF46GH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
SF46GH.pdf
- Description:
- DIODE GEN PURP 400V 4A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SF46GH from Taiwan Semiconductor is a 400V, 4A super fast recovery rectifier diode in DO-201AD package, featuring 1.3V forward voltage at 4A and 35ns reverse recovery time, designed for high-efficiency DC-DC converters and switching inverters requiring low conduction loss and fast switching.
For engineers reviewing the SF46GH datasheet, SF46GH pinout, SF46GH application, or SF46GH equivalent, key selection criteria include VRRM = 400V, IF = 4A, trr = 35ns, VF = 1.3V (at 4A, 25°C), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This single-die silicon rectifier operates with a maximum junction temperature of 150°C and exhibits low junction-to-ambient thermal resistance (25°C/W), enabling stable performance under continuous 4A forward current. Its 80pF junction capacitance at 1MHz/4V supports high-frequency switching operation.
The device delivers 125A non-repetitive surge current capability (8.3ms half-sine) and maintains reverse leakage ≤5µA at 25°C and ≤500µA at 125°C, ensuring robust blocking behavior across automotive and industrial temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Maximum repetitive reverse voltage the diode blocks without breakdown |
| IF | 4 A - Continuous average forward current rating at case temperature ≤75°C |
| trr | 35 ns - Reverse recovery time defining minimum dead-time requirements in synchronous topologies |
| VF | 1.3 V @ 4A, 25°C - Forward voltage drop directly determining conduction loss in power stage |
| IFSM | 125 A - Peak non-repetitive surge current tolerance for startup or fault transients |
| Junction capacitance | 80 pF @ 1MHz, 4V - Capacitance affecting high-frequency switching losses and EMI generation |
Pinout & Package
DO-201AD axial-leaded package with cathode indicated by band; 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 | Forward current entry point | Connected to lower-potential side (e.g., switch node in buck converter) |
| Cathode | Forward current exit / reverse blocking terminal | Marked with band; connects to output rail or higher potential in freewheeling path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control and ADAS power supplies |
| Super fast recovery (35ns) | Enables >100kHz switching frequencies with minimal reverse recovery loss |
| Low VF (1.3V @ 4A) | Reduces conduction loss by ~15% vs. standard fast rectifiers at same current |
| High IFSM/IF ratio (31:1) | Supports transient overloads without bond-wire fusing during inrush or short-circuit events |
Applications
| DC-DC Converter | Switching Inverter |
|---|---|
Use Scenario: Secondary-side rectification in isolated flyback or forward converters for automotive infotainment power supplies. IC Role / Device Role / Timing Role: Freewheeling diode conducting during MOSFET off-time to maintain output current continuity. Use Value: 35ns trr minimizes reverse recovery charge (Qrr) and associated switching loss, improving efficiency at 200–500kHz operation. | Use Scenario: Output rectification in 400V-class solar microinverters and UPS systems. IC Role / Device Role / Timing Role: Unidirectional current path converting high-frequency AC from H-bridge into regulated DC output. Use Value: 400V VRRM and 125A IFSM ensure reliable operation under grid-voltage surges and load transients. |
| Freewheeling Diode | Industrial SMPS |
Use Scenario: Inductive load snubbing in solenoid drivers and motor control gate-drive auxiliary supplies. IC Role / Device Role / Timing Role: Provides low-impedance return path when main switch turns off, clamping inductive kickback. Use Value: 1.3V VF limits power dissipation during sustained freewheeling, reducing heatsink requirements. | Use Scenario: Primary-side clamp and secondary-side rectification in telecom rectifiers and PLC power modules. IC Role / Device Role / Timing Role: High-reliability rectifier handling continuous 4A load with AEC-Q101 stress validation. Use Value: RoHS-compliant, halogen-free construction meets IPC-61249-2-21 for industrial environmental compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH4R04G | VRRM = 400V, trr = 30ns, VF = 1.25V @ 4A - slightly faster and lower VF, but not AEC-Q101 qualified | Preferred for commercial SMPS where automotive qualification is unnecessary | Select STTH4R04G when lowest possible switching loss is prioritized over automotive qualification |
| ES4D-E3/54 | VRRM = 400V, trr = 35ns, VF = 1.35V @ 4A - identical recovery speed, marginally higher VF, AEC-Q101 qualified | Drop-in replacement in space-constrained designs using same DO-201AD footprint | Choose ES4D-E3/54 if sourcing flexibility across multiple authorized distributors is required |
Compared with STTH4R04G and ES4D-E3/54, SF46GH uniquely combines AEC-Q101 qualification, 1.3V VF, and 35ns trr in a cost-optimized DO-201AD package-making it optimal for automotive and industrial DC-DC where reliability and thermal margin are critical.
Availability
SF46GH is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and freewheeling applications requiring stable component supply, automotive-grade qualification, and consistent parametric performance across production lots.
Supply support for SF46GH 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 global automotive, industrial, and consumer markets since 1979.
The SF4xG series was developed specifically for high-reliability power conversion applications demanding fast recovery, low forward drop, and AEC-Q101 validation-targeting automotive body electronics, industrial SMPS, and renewable energy interfaces.
FAQ
What is the peak repetitive reverse voltage rating for SF46GH?
The SF46GH has a peak repetitive reverse voltage (VRRM) rating of 400 V, verified per the manufacturer's absolute maximum ratings table. This value defines the highest reverse-biased voltage the device can block continuously without avalanche breakdown. The SF46GH is part of the SF41G–SF48G family where "46" explicitly denotes the 400V grade, confirmed in the voltage matrix on page 1 of the G2105 datasheet revision.
Is SF46GH qualified to AEC-Q101 standards?
Yes, SF46GH is AEC-Q101 qualified, as indicated by the "H" suffix in the ordering code and explicitly stated in the FEATURES section. This qualification covers stress tests including HTSL, TC, UHAST, and mechanical shock, validating suitability for automotive power electronics. The SF46GH datasheet version G2105 confirms this status under both Features and Ordering Information sections.
What is the forward voltage of SF46GH at rated current?
The forward voltage (VF) of SF46GH is 1.3 V at 4 A and 25°C junction temperature, per the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) and represents typical conduction loss under nominal operating conditions. At elevated temperatures (e.g., 125°C), VF decreases slightly due to semiconductor physics, but derating curves confirm safe operation up to 150°C junction temperature.
What package type does SF46GH use, and what are its mechanical features?
SF46GH uses the DO-201AD axial-leaded package, specified in the MECHANICAL DATA section. Key features include UL 94V-0 flammability-rated molding compound, pure tin-plated leads compliant with J-STD-002 solderability, JESD201 Class 2 whisker resistance, and cathode polarity marked by a visible band. The device weighs approximately 1.10 g and is supplied in tape-and-reel (1,250 pcs) or ammo box (500 pcs) packaging.
How does the reverse recovery time of SF46GH impact circuit design?
The SF46GH has a reverse recovery time (trr) of 35 ns, measured at IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This parameter directly affects switching loss, EMI generation, and required dead time in bridge configurations. Designers must ensure gate-drive timing accommodates ≥40 ns dead time to prevent shoot-through, especially in hard-switched topologies operating above 100 kHz.
SF46GH 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):
- 400 V
- Current - Average Rectified (Io):
- 4A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 4 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 400 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
SF46GH FAQ
1.How can I place an order for SF46GH through Aetrix?
Please submit a Request for Quotation (RFQ) for SF46GH 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 SF46GH reliable?
The price and inventory of SF46GH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF46GH is usually 5 days.
3.What payment methods are accepted for SF46GH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF46GH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SF46GH?
SF46GH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SF46GH 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 SF46GH?
For technical support, including SF46GH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF46GH requirements.
6.How does Aetrix verify that SF46GH is sourced from the original manufacturer or authorized distributors?
All SF46GH 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 SF46GH meets industry standards.
7.What is the process for return or replacement of SF46GH?
All SF46GH units undergo pre-shipment inspection (PSI). If there is an issue with SF46GH, 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 SF46GH part is unused and in its original packaging.
Return procedure for SF46GH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SF46GH Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
