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Vishay General Semiconductor - Diodes Division US1GHE3_A/H
- Part No.:
- US1GHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
US1GHE3_A/H.pdf
- Description:
- DIODE GEN PURP 400V 1A DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,081
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Product details
Overview
US1GHE3_A/H from Vishay General Semiconductor is a surface-mount ultrafast rectifier diode in SMA (DO-214AC) package, rated for 400 V maximum repetitive peak reverse voltage (VRRM), 1.0 A average forward current (IF(AV)), and 50 ns reverse recovery time (trr). It features glass passivated junction, AEC-Q101 qualification, and is used in high-frequency freewheeling and output rectification in automotive DC/DC converters.
For engineers reviewing the US1GHE3_A/H datasheet, US1GHE3_A/H pinout, US1GHE3_A/H application, or US1GHE3_A/H equivalent, key selection criteria include its 400 V VRRM rating, 50 ns trr for low switching loss, AEC-Q101 qualification for automotive reliability, and SMA package compatibility with automated SMT placement.
Technical Context
This device is a single-die, single-anode/cathode silicon PN junction rectifier optimized for high-frequency switching operation. Its ultrafast recovery (50 ns) and low forward voltage (1.7 V at 1.0 A) enable high efficiency in flyback and boost topologies where reverse recovery losses dominate.
The SMA (DO-214AC) package provides thermal resistance of 75 °C/W (RθJA) and 27 °C/W (RθJL), supporting operation up to 150 °C junction temperature. AEC-Q101 qualification confirms robustness under automotive temperature cycling, humidity, and mechanical stress conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - blocks up to 400 V reverse voltage in DC/DC output stages without breakdown |
| IF(AV) | 1.0 A at TL = 110 °C - supports continuous 1 A conduction on standard 5 mm × 5 mm PCB copper pad |
| trr | 50 ns - enables operation up to ~2 MHz switching frequency with minimal reverse recovery loss |
| VF at IF = 1.0 A | 1.7 V - contributes <1.7 W conduction loss at full load, critical for thermal management |
| IFSM | 30 A - withstands 8.3 ms surge events such as input hot-swap or load dump transients |
| TJ max. | 150 °C - allows use in under-hood automotive environments with no derating below 110 °C ambient |
| IR at VRRM | 10 µA at 25 °C - ensures low leakage in standby mode for battery-powered systems |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads; cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., switch node in buck converter); must handle 30 A surge |
| Cathode | Forward current exit point / reverse blocking terminal | Connected to output rail; polarity marking ensures correct orientation during automated placement |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive powertrain and body electronics per stress test requirements (temperature cycling, HAST, etc.) |
| Glass passivated junction | Enhances long-term reliability and moisture resistance vs. epoxy-passivated alternatives |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without preconditioning or baking |
| Low profile SMA package | 0.208" height enables compact layout in space-constrained modules like ECU power supplies |
| High IFSM / IF(AV) ratio (30:1) | Supports transient-heavy applications such as motor drive freewheeling without oversized heatsinking |
Applications
| Automotive DC/DC Converters | Server VRM Output Rectification |
|---|---|
|
Use Scenario: 12 V–48 V bidirectional DC/DC converter in 48 V mild hybrid vehicle architecture. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous rectifier stage, conducting during low-side FET off-time. Use Value: 50 ns trr minimizes cross-conduction loss and improves efficiency >95% at 300 kHz switching. |
Use Scenario: Secondary-side rectification in 48 V input server VRM supplying 1 V @ 200 A to CPU. IC Role / Device Role / Timing Role: Ultrafast clamp diode in active clamp forward topology, handling reset energy. Use Value: 1.7 V VF and 30 A IFSM support high peak currents while maintaining thermal stability on 2 oz copper. |
| Industrial SMPS Flyback Outputs | Telecom AC/DC Adapter Secondary Side |
|
Use Scenario: 24 V/3 A isolated flyback supply for PLC I/O module with wide input range (85–265 VAC). IC Role / Device Role / Timing Role: Output rectifier delivering regulated DC after transformer secondary winding. Use Value: 400 V VRRM safely handles reflected flyback spikes; 150 °C TJ rating enables operation in sealed enclosures. |
Use Scenario: Compact wall adapter (12 V/2 A) for VoIP phone with strict EMI limits. IC Role / Device Role / Timing Role: High-frequency output rectifier in quasi-resonant flyback design. Use Value: Low trr reduces high-frequency ringing and eases EMI filter design; RoHS-compliant HE3 suffix meets global compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| US1G-E3/61T | Same VRRM (400 V), trr (50 ns), and IF(AV) (1.0 A), but commercial-grade (non-AEC-Q101), no automotive qualification | Suitable for industrial/commercial power supplies where automotive reliability testing is not required | Select US1GHE3_A/H when AEC-Q101 compliance is mandatory; choose US1G-E3/61T for cost-sensitive non-automotive designs |
| STTH1R04 | Same SMA package, 400 V VRRM, 1.0 A IF(AV), but trr = 60 ns (slower), VF = 1.75 V (slightly higher) | Acceptable in lower-frequency (<500 kHz) telecom adapters where margin exists on recovery loss | US1GHE3_A/H offers tighter trr spec and automotive qualification; STTH1R04 may be preferred if dual-sourcing across suppliers is needed |
Compared with US1G-E3/61T and STTH1R04, US1GHE3_A/H uniquely combines AEC-Q101 qualification, 50 ns trr, and 1.7 V VF in a single-source, drop-in-replaceable SMA footprint-making it the only option qualified for safety-critical automotive power conversion without layout change.
Availability
US1GHE3_A/H is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial SMPS flyback outputs, and telecom AC/DC adapter secondary-side rectification requiring stable component supply and AEC-Q101 compliance.
Supply support for US1GHE3_A/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 and performance.
The US1x family targets high-efficiency, high-frequency power conversion in automotive, industrial, and computing applications-designed specifically to replace slower general-purpose rectifiers with ultrafast, thermally robust alternatives.
FAQ
What is the maximum junction temperature rating for US1GHE3_A/H?
The US1GHE3_A/H has a maximum junction temperature (TJ max.) of 150 °C, enabling reliable operation in under-hood automotive environments and sealed industrial enclosures without forced cooling. This rating is validated per AEC-Q101 stress tests and applies across its full operating range.
Is US1GHE3_A/H pin-compatible with other US1x series diodes in SMA package?
Yes, US1GHE3_A/H shares identical SMA (DO-214AC) mechanical dimensions and anode/cathode pinout with all US1x variants (e.g., US1A, US1J), allowing direct substitution within the same voltage grade-provided VRRM, trr, and qualification requirements align with system needs.
Does US1GHE3_A/H meet RoHS and halogen-free requirements?
US1GHE3_A/H is RoHS-compliant per EU Directive 2011/65/EU and carries the HE3 suffix indicating AEC-Q101 qualification; however, it is not halogen-free-the HM3 suffix denotes halogen-free construction, so US1GHE3_A/H is RoHS-compliant but contains halogens per Vishay's material categorization.
What is the reverse recovery time (trr) specification for US1GHE3_A/H?
The US1GHE3_A/H has a maximum reverse recovery time (trr) of 50 ns, measured at IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This value is confirmed in the Vishay datasheet revision 12-Aug-2022 (Doc. #88768) and enables efficient operation in switching power supplies up to ~2 MHz.
Can US1GHE3_A/H be used in place of US1G-E3/61T without layout changes?
Yes, US1GHE3_A/H uses the identical SMA (DO-214AC) package, pinout, and thermal pad layout as US1G-E3/61T, requiring no PCB modifications. The only differences are AEC-Q101 qualification and packaging format (A/H reel vs. 61T reel); electrical and mechanical interfaces remain fully compatible.
US1GHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- DO-214AC, SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 400 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 400 V
- Capacitance @ Vr, F:
- 15pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
- Operating Temperature - Junction:
- -55°C ~ 150°C
US1GHE3_A/H FAQ
1.How can I place an order for US1GHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for US1GHE3_A/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 US1GHE3_A/H reliable?
The price and inventory of US1GHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for US1GHE3_A/H is usually 5 days.
3.What payment methods are accepted for US1GHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for US1GHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for US1GHE3_A/H?
US1GHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your US1GHE3_A/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 US1GHE3_A/H?
For technical support, including US1GHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your US1GHE3_A/H requirements.
6.How does Aetrix verify that US1GHE3_A/H is sourced from the original manufacturer or authorized distributors?
All US1GHE3_A/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 US1GHE3_A/H meets industry standards.
7.What is the process for return or replacement of US1GHE3_A/H?
All US1GHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with US1GHE3_A/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 US1GHE3_A/H part is unused and in its original packaging.
Return procedure for US1GHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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