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Vishay General Semiconductor - Diodes Division VSSAF522HM3/H
- Part No.:
- VSSAF522HM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
VSSAF522HM3/H.pdf
- Description:
- DIODE SCHOTTKY 200V 2A DO221AC
- Quantity:
- Payment:
- Shipping:
Inventory:13,370
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Product details
Overview
VSSAF522HM3/H from Vishay General Semiconductor is a surface-mount Trench MOS Barrier Schottky (TMBS®) rectifier optimized for high-frequency DC/DC converters and freewheeling applications, featuring 200 V reverse voltage rating, 5.0 A average forward current, 0.69 V forward voltage at 5.0 A and 125 °C, and AEC-Q101 qualification for automotive use.
For engineers reviewing the VSSAF522HM3/H datasheet, VSSAF522HM3/H pinout, VSSAF522HM3/H application, or VSSAF522HM3/H equivalent, key selection criteria include low-profile SlimSMA (DO-221AC) packaging, junction-to-mount thermal resistance of 12 °C/W, MSL Level 1 moisture sensitivity, and verified performance under 175 °C maximum junction temperature.
Technical Context
The VSSAF522HM3/H employs trench MOS Schottky technology to achieve lower forward voltage and reduced switching losses compared to planar Schottky diodes. Its single-anode/cathode configuration supports unidirectional conduction in high-efficiency power stages.
Designed for operation up to 175 °C junction temperature, it delivers stable reverse leakage (<0.7 mA at 200 V, 125 °C) and low junction capacitance (240 pF at 4.0 V, 1 MHz), enabling reliable performance in fast-switching topologies like synchronous buck converters and flyback snubbers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - Supports input rails up to 170 V DC in industrial and automotive DC/DC converters without derating. |
| IF(AV) | 5.0 A - Rated continuous forward current on 30 mm × 30 mm aluminum PCB; enables compact 5 A power stage designs. |
| VF @ 5.0 A, 125 °C | 0.69 V - Low conduction loss reduces power dissipation by ~30% vs. comparable 200 V Si diodes. |
| IFSM | 90 A - Withstands short-duration surge currents typical of inductive load turn-off or startup transients. |
| RθJM | 12 °C/W - Enables efficient heat transfer to metal-core PCBs, critical for thermally constrained automotive modules. |
| Junction Temp. Max | 175 °C - Allows operation in under-hood environments and high-ambient industrial enclosures. |
| Package | SlimSMA (DO-221AC) - 0.95 mm profile fits ultra-thin power supplies; halogen-free, RoHS-compliant, AEC-Q101 qualified. |
Pinout & Package
SlimSMA (DO-221AC) package with molded epoxy body, matte tin-plated leads, and cathode indicated by color band. Complies with UL 94 V-0 flammability rating and JESD 201 Class 2 whisker test.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input terminal for forward conduction path | Connected to switching node or inductor output; must handle peak repetitive current and transient surges. |
| Cathode | Output terminal for forward conduction path | Connected to output rail or ground return; serves as thermal interface mount point on aluminum PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Trench MOS Schottky architecture | Enables 0.69 V VF at 5 A/125 °C - reduces conduction loss and improves system efficiency over planar alternatives. |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak - eliminates baking requirements and simplifies SMT assembly. |
| AEC-Q101 qualification | Validated for automotive under-hood applications including engine control units and ADAS power supplies. |
| Low profile (0.95 mm height) | Enables integration into space-constrained modules such as LED drivers and portable industrial sensors. |
| Junction-to-mount thermal resistance | 12 °C/W - facilitates direct thermal coupling to metal-core PCBs, improving thermal management without heatsinks. |
Applications
| Automotive DC/DC Converters | Industrial Freewheeling Diodes |
|---|---|
Use Scenario: Step-down conversion from 48 V battery to 12 V subsystem rail in mild-hybrid vehicles. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous buck converter operating at 200–500 kHz. Use Value: 0.69 V VF at 125 °C minimizes conduction loss and thermal stress during sustained high-load operation. |
Use Scenario: Energy recirculation in motor drive half-bridge outputs during PWM dead-time. IC Role / Device Role / Timing Role: Unidirectional freewheeling path for inductive back-EMF suppression. Use Value: 90 A IFSM withstands motor stall surges; 175 °C TJ max ensures reliability in sealed enclosures. |
| High-Frequency Inverters | Polarity Protection Circuits |
Use Scenario: Output rectification in resonant LLC inverters for solar micro-inverters. IC Role / Device Role / Timing Role: High-speed output rectifier handling >300 kHz switching with minimal reverse recovery. Use Value: 240 pF CJ limits capacitive switching loss; trench structure eliminates minority-carrier tail current. |
Use Scenario: Reverse-voltage blocking in USB-C PD power delivery modules and fieldbus interfaces. IC Role / Device Role / Timing Role: Input polarity guard protecting downstream PMICs and controllers. Use Value: 200 V VRRM provides margin against line transients; 0.05 mA IR at 200 V/25 °C ensures low standby leakage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VSSAF522-M3/H | Commercial-grade version; same electrical specs but not AEC-Q101 qualified. | Approved for commercial/industrial use only; not certified for automotive production. | Select when AEC-Q101 compliance is not required and cost optimization is prioritized. |
| SS220H | 200 V, 2 A average current; higher VF (0.85 V @ 2 A, 25 °C); DO-214AC package (higher profile, 2.3 mm). | Limited to ≤2 A loads; unsuitable for 5 A thermal design targets or ultra-low-profile layouts. | Use only for lower-current, non-automotive applications where SlimSMA footprint is not mandatory. |
Compared with VSSAF522HM3/H, the VSSAF522-M3/H offers identical performance at lower qualification cost, while SS220H trades current capacity and package height for broader distributor availability - making VSSAF522HM3/H optimal for AEC-Q101–required 5 A automotive power stages.
Availability
VSSAF522HM3/H is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial motor drives, and high-frequency solar inverters requiring stable component supply, AEC-Q101 traceability, and consistent SlimSMA (DO-221AC) packaging.
Supply support for VSSAF522HM3/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 high-reliability diodes, MOSFETs, and optoelectronics for demanding industrial and automotive applications.
The VSSAF522HM3/H belongs to Vishay's TMBS® (Trench MOS Barrier Schottky) rectifier family, engineered specifically to replace conventional Schottky and fast recovery diodes in high-efficiency, high-temperature power conversion systems.
FAQ
What is the AEC-Q101 qualification status of VSSAF522HM3/H?
VSSAF522HM3/H is fully AEC-Q101 qualified per the Vishay datasheet (Document Number: 87453, Revision: 21-Apr-2023). This certification covers stress testing for temperature cycling, humidity bias, mechanical shock, and high-temperature operating life - confirming suitability for automotive under-hood applications. The "HM3" suffix explicitly denotes AEC-Q101 qualification, distinguishing it from the commercial-grade VSSAF522-M3/H variant.
Does VSSAF522HM3/H have a defined pinout or terminal assignment?
Yes - VSSAF522HM3/H uses a two-terminal SlimSMA (DO-221AC) package with clearly defined anode and cathode terminals. The cathode is marked by a color band on the body; the anode is the opposite end. Pinout validation is confirmed in the official Vishay mechanical drawings and mounting pad layout diagram (page 4, Document Number: 87453), showing cathode as the thermal mounting surface.
What is the thermal resistance from junction to mount (RθJM) for VSSAF522HM3/H?
The VSSAF522HM3/H has a typical RθJM of 12 °C/W when mounted on a 30 mm × 30 mm aluminum PCB, as specified in the Thermal Characteristics table (page 2, Document Number: 87453). This value is measured with the cathode terminal serving as the thermal interface, enabling efficient heat extraction in metal-core board designs without additional thermal vias or heatsinks.
Can VSSAF522HM3/H be used in high-frequency (>1 MHz) applications?
VSSAF522HM3/H supports high-frequency operation due to its trench MOS Schottky structure, which eliminates minority-carrier storage delay. With a typical junction capacitance of 240 pF at 4.0 V and 1 MHz, and no reverse recovery charge (Qrr = 0), it is suitable for switching frequencies up to 1 MHz in resonant and soft-switching topologies - confirmed by Vishay's Fig. 5 (CJ vs. reverse voltage) and Fig. 4 (reverse leakage stability at high dV/dt).
What is the maximum junction temperature rating for VSSAF522HM3/H?
The VSSAF522HM3/H has a maximum rated junction temperature (TJ max) of +175 °C, as stated in the Primary Characteristics table (page 1, Document Number: 87453). This rating is validated across the full operating range (−40 °C to +175 °C) and enables deployment in under-hood automotive environments and sealed industrial enclosures where ambient temperatures exceed 105 °C.
VSSAF522HM3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- DO-221AC, SMA Flat Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 200 V
- Current - Average Rectified (Io):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 50 µA @ 200 V
- Capacitance @ Vr, F:
- 240pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-221AC (SlimSMA)
- Operating Temperature - Junction:
- -40°C ~ 175°C
VSSAF522HM3/H FAQ
1.How can I place an order for VSSAF522HM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for VSSAF522HM3/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 VSSAF522HM3/H reliable?
The price and inventory of VSSAF522HM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VSSAF522HM3/H is usually 5 days.
3.What payment methods are accepted for VSSAF522HM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VSSAF522HM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VSSAF522HM3/H?
VSSAF522HM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VSSAF522HM3/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 VSSAF522HM3/H?
For technical support, including VSSAF522HM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VSSAF522HM3/H requirements.
6.How does Aetrix verify that VSSAF522HM3/H is sourced from the original manufacturer or authorized distributors?
All VSSAF522HM3/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 VSSAF522HM3/H meets industry standards.
7.What is the process for return or replacement of VSSAF522HM3/H?
All VSSAF522HM3/H units undergo pre-shipment inspection (PSI). If there is an issue with VSSAF522HM3/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 VSSAF522HM3/H part is unused and in its original packaging.
Return procedure for VSSAF522HM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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