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Vishay AU1FGHM3/H
- Part No.:
- AU1FGHM3/H
- Manufacturer:
- Vishay
- Category:
- Single Diodes
- Package:
- DO-219AB
- Datasheet:
-
AU1FGHM3/H.pdf
- Description:
- 1A,400V,AVALANCHE,ULTRAFAST,SMF
- Quantity:
- Payment:
- Shipping:
Inventory:9,304
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Product details
Overview
AU1FGHM3/H from Vishay General Semiconductor is a surface-mount ultrafast avalanche rectifier in SMF (DO-219AB) package, rated for 400 V repetitive peak reverse voltage (VRRM), 1.0 A average forward current (IF(AV)), and 75 ns reverse recovery time (trr). It serves as a freewheeling or output rectifier in automotive DC/DC converters, where low reverse leakage (1 μA at 25 °C), low forward voltage (1.85 V at 25 °C), and AEC-Q101 qualification ensure reliability under high-frequency switching and elevated junction temperatures up to 175 °C.
For engineers reviewing the AU1FGHM3/H datasheet, AU1FGHM3/H pinout, AU1FGHM3/H application, or AU1FGHM3/H equivalent, this page delivers verified electrical parameters, thermal behavior, mechanical dimensions, and real-world use context - including automotive-grade qualification, SOD-123W-compatible footprint, and EAS=20 mJ non-repetitive avalanche energy handling capability.
Technical Context
This device is a single-die, silicon planar, glass-passivated ultrafast rectifier optimized for high-frequency power conversion. Its 75 ns trr, 12.2 pF junction capacitance at 4.0 V, and 1.85 V forward voltage at 1.0 A / 25 °C reflect trade-offs between speed, conduction loss, and voltage rating within the AU1F family.
The SMF (DO-219AB) package enables automated placement and supports wave/reflow soldering per J-STD-020 MSL Level 1. With RθJA = 130 °C/W and RθJM = 20 °C/W, thermal performance is defined for 2 oz. copper pad layouts - critical for sustaining 1.0 A continuous current in compact automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Maximum repetitive reverse blocking voltage; defines safe operating range in 24 V–48 V automotive bus applications. |
| IF(AV) | 1.0 A - Continuous average forward current at TA = 25 °C with recommended PCB layout; derates linearly above 25 °C mount temperature. |
| trr | 75 ns - Measured at IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A; enables efficient operation in 100–500 kHz switching topologies. |
| VF @ 1.0 A, 25 °C | 1.85 V - Forward voltage drop directly impacts conduction loss and thermal load in high-duty-cycle rectification stages. |
| EAS | 20 mJ - Non-repetitive avalanche energy rating at IAS = 1.0 A; provides robustness against inductive turn-off transients without external snubbers. |
| TJ max. | 175 °C - Maximum junction temperature; supports operation in under-hood environments with minimal derating. |
| CJ @ 4 V, 1 MHz | 12.2 pF - Junction capacitance affects high-frequency switching noise and EMI generation in fast-switching converters. |
Pinout & Package
Package: SMF (DO-219AB), low-profile surface-mount case with matte tin-plated leads, compatible to SOD-123W outline. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to input side of rectifier stage (e.g., switch node in buck converter); must handle 30 A surge (IFSM) during fault conditions. |
| Cathode | Forward current exit point | Connected to output rail or ground return; polarity marking ensures correct orientation during automated placement and prevents reverse-bias failure. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS power supplies, with extended temperature cycling and humidity testing. |
| Glass passivated junction | Provides stable long-term reliability and resistance to moisture ingress, critical for under-hood deployment over 15-year vehicle lifetimes. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow assembly without popcorn effect or delamination risk on standard production lines. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and IPC-1752A material declarations; supports sustainability compliance for Tier 1 OEMs. |
| Low profile (1.3 mm height) | Reduces board stack height in space-constrained modules such as LED drivers and infotainment DC/DC regulators. |
Applications
| Automotive DC/DC Converters | Industrial Power Supplies |
|---|---|
Use Scenario: Step-down conversion from 48 V battery to 12 V auxiliary rail in mild-hybrid vehicles. IC Role / Device Role / Timing Role: Output freewheeling diode in synchronous or asynchronous buck topology. Use Value: 75 ns trr minimizes reverse recovery loss; 175 °C TJ max. sustains operation near hot engine compartments. |
Use Scenario: Input rectification in universal-input AC/DC front-end for programmable logic controllers. IC Role / Device Role / Timing Role: Bridge leg diode in full-wave rectifier configuration. Use Value: 400 V VRRM withstands 350 VAC line surges; 1 μA IR reduces standby power loss. |
| Telecom DC/DC Modules | Consumer Adapter Rectification |
Use Scenario: Secondary-side rectification in isolated 48 V–5 V telecom brick converters. IC Role / Device Role / Timing Role: High-frequency output rectifier replacing Schottky diodes where higher VRRM is required. Use Value: 12.2 pF CJ limits capacitive switching loss; EAS=20 mJ absorbs transformer leakage energy spikes. |
Use Scenario: Output rectification in compact wall adapters for USB-C PD devices. IC Role / Device Role / Timing Role: Low-profile, cost-effective replacement for SOD-123 Schottkys in <10 W designs. Use Value: SMF package fits tight footprints; halogen-free construction meets IEC 61204-3 safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay AU1FG-M3/H | No AEC-Q101 qualification; identical VRRM, trr, and package; lower cost for non-automotive use. | Not approved for automotive ECUs or ADAS systems; suitable for industrial/commercial power supplies only. | Select AU1FG-M3/H when AEC-Q101 is not mandated and cost sensitivity outweighs qualification requirements. |
| ON Semiconductor MUR140G | Same VRRM (400 V), but TO-220AC package (larger, through-hole); trr = 50 ns, VF = 1.25 V @ 1 A - faster but less compact. | Requires PCB through-holes and heatsinking; used in legacy industrial supplies where layout change is acceptable. | Choose MUR140G only if board redesign is feasible and lower VF justifies larger footprint and assembly complexity. |
Compared with AU1FG-M3/H, AU1FGHM3/H adds AEC-Q101 qualification without altering electrical specs - enabling drop-in use in automotive programs. Versus MUR140G, it trades 25 ns faster recovery and lower VF for 70% smaller footprint and surface-mount compatibility - critical for modern high-density power modules.
Availability
AU1FGHM3/H is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial AC/DC power supplies, and telecom DC/DC modules requiring stable component supply, AEC-Q101 compliance, and consistent lead-time performance across volume production ramps.
Supply support for AU1FGHM3/H 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and optoelectronics with emphasis on reliability, efficiency, and automotive-grade validation.
The AU1F series was developed specifically for high-frequency, high-temperature rectification in automotive and industrial power conversion - delivering ultrafast recovery, robust avalanche capability, and compact packaging in one platform.
FAQ
What is the maximum junction temperature rating for AU1FGHM3/H?
The AU1FGHM3/H has a maximum junction temperature (TJ) of 175 °C, validated per AEC-Q101 stress testing. This allows sustained operation in under-hood automotive environments where ambient temperatures exceed 105 °C, provided thermal design maintains junction temperature below this limit using the specified RθJA = 130 °C/W and RθJM = 20 °C/W values. The AU1FGHM3/H achieves this via glass-passivated silicon die and optimized SMF package thermal path.
Is AU1FGHM3/H pin-compatible with standard SOD-123W footprint designs?
Yes, AU1FGHM3/H uses the SMF (DO-219AB) package, which is explicitly stated as compatible to the SOD-123W package case outline in the Vishay datasheet. Its mechanical dimensions - including 2.9 mm length, 1.4 mm width, and 1.3 mm height - match SOD-123W land patterns, enabling direct substitution without PCB modification. The AU1FGHM3/H cathode marking and terminal plating also conform to J-STD-002 and JESD 22-B102 standards for reliable solder joint formation.
Does AU1FGHM3/H support lead-free reflow soldering?
Yes, AU1FGHM3/H is qualified for lead-free reflow soldering with a maximum peak temperature of 260 °C, meeting J-STD-020 MSL Level 1 requirements. Its matte tin-plated terminals and UL 94 V-0 molding compound ensure compatibility with standard Pb-free reflow profiles. The AU1FGHM3/H has been tested for whisker resistance per JESD 201 Class 2, confirming long-term interconnect reliability in automotive and industrial assemblies subjected to thermal cycling.
What is the reverse recovery time (trr) specification for AU1FGHM3/H and how is it measured?
The AU1FGHM3/H has a typical reverse recovery time (trr) of 75 ns, measured under standardized conditions: IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A, per JEDEC test methodology. This value reflects the diode's ability to transition from forward conduction to reverse blocking in high-frequency switching circuits. The AU1FGHM3/H achieves this performance through optimized carrier lifetime control in its ultrafast silicon structure, minimizing switching losses in DC/DC converters operating above 100 kHz.
How does the avalanche energy rating (EAS) of AU1FGHM3/H benefit circuit design?
The AU1FGHM3/H specifies a non-repetitive avalanche energy (EAS) of 20 mJ at IAS = 1.0 A and TA = 25 °C. This rating enables the AU1FGHM3/H to safely absorb inductive energy spikes - such as those from transformer leakage in flyback converters or motor winding back-EMF - without catastrophic failure. Designers can eliminate or reduce external snubber networks when using the AU1FGHM3/H, simplifying layout and improving system efficiency while maintaining robustness in automotive and industrial transient-prone environments.
AU1FGHM3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay
- Series:
- eSMP®
- Package/Case:
- DO-219AB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Avalanche
- Voltage - DC Reverse (Vr) (Max):
- 400 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 75 ns
- Current - Reverse Leakage @ Vr:
- 1 µA @ 400 V
- Capacitance @ Vr, F:
- 12.2pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
- Operating Temperature - Junction:
- -55°C ~ 175°C
AU1FGHM3/H FAQ
1.How can I place an order for AU1FGHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for AU1FGHM3/H 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 AU1FGHM3/H reliable?
The price and inventory of AU1FGHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AU1FGHM3/H is usually 5 days.
3.What payment methods are accepted for AU1FGHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AU1FGHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AU1FGHM3/H?
AU1FGHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AU1FGHM3/H 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 AU1FGHM3/H?
For technical support, including AU1FGHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AU1FGHM3/H requirements.
6.How does Aetrix verify that AU1FGHM3/H is sourced from the original manufacturer or authorized distributors?
All AU1FGHM3/H 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 AU1FGHM3/H meets industry standards.
7.What is the process for return or replacement of AU1FGHM3/H?
All AU1FGHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with AU1FGHM3/H, 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 AU1FGHM3/H part is unused and in its original packaging.
Return procedure for AU1FGHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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