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Vishay General Semiconductor - Diodes Division SMBG8.5AHE3/52
- Part No.:
- SMBG8.5AHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG8.5AHE3/52.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMBG8.5AHE3/52 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 8.5 V stand-off voltage (VWM), 9.44–10.4 V breakdown voltage (VBR) at 1 mA, 14.4 V clamping voltage (VC) at 20 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - used to safeguard MOSFETs, ICs, and sensor signal lines in automotive and industrial systems.
For engineers reviewing the SMBG8.5AHE3/52 datasheet, SMBG8.5AHE3/52 pinout, SMBG8.5AHE3/52 application, or SMBG8.5AHE3/52 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This TVS diode operates as a clamping device that remains high-impedance below VWM (8.5 V) and rapidly transitions to low-impedance conduction above VBR (9.44–10.4 V), limiting transient-induced voltage excursions to ≤14.4 V at 20 A. Its glass-passivated junction ensures stable avalanche characteristics and long-term reliability under repetitive surge stress.
Designed for surface-mount use in space-constrained applications, the SMBG8.5AHE3/52 delivers fast response time (<1 ns), meets MSL Level 1 per J-STD-020, and supports lead-free reflow soldering up to 260 °C peak. It is rated for -55 °C to +150 °C operating junction temperature and exhibits 100 °C/W junction-to-ambient thermal resistance on 5.0 mm × 5.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - maximum continuous reverse working voltage before clamping begins |
| VBR (min/max) | 9.44 V / 10.4 V at IT = 1 mA - guaranteed avalanche onset range for reliable triggering |
| VC @ IPPM | 14.4 V at 20 A - peak clamped voltage during 10/1000 μs transient, defining protected circuit voltage ceiling |
| PPPM | 600 W - peak pulse power handling capability under standardized surge waveform |
| ID @ VWM | 1.0 μA - ultra-low leakage current ensuring minimal standby power loss and signal integrity |
| TJ max | +150 °C - enables operation in under-hood automotive and high-temperature industrial environments |
| Package | SMBG (DO-215AA) - industry-standard surface-mount outline with cathode band marking and matte tin leads |
Pinout & Package
Package: SMBG (DO-215AA), low-profile surface-mount case with molded UL 94 V-0 compound, 0.235" × 0.130" footprint, and cathode band indicating terminal polarity. Terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction; connected to system ground or low-side reference | Provides return path for surge current when device is reverse-biased in protection configuration |
| Cathode | Marked end (band); connected to protected line or I/O node | Accepts transient energy from signal/power line and routes it to ground via anode during clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing |
| Glass passivated junction | Ensures consistent avalanche behavior, low parameter drift, and long service life under repeated transients |
| 600 W peak pulse power (10/1000 μs) | Supports robust protection against ISO 7637-2 Load Dump and IEC 61000-4-5 surge events in 12 V systems |
| MSL Level 1 (260 °C peak) | Enables single-reflow assembly without moisture sensitivity concerns or baking requirements |
| Low clamping ratio (VC/VBR ≈ 1.44) | Minimizes voltage overshoot during clamping, reducing stress on downstream components like microcontrollers and transceivers |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply rails in body control modules, lighting drivers, and infotainment head units from load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and local regulator input to clamp surges before they reach LDOs or DC/DC controllers. Use Value: Limits transient voltage to ≤14.4 V, preventing damage to 16 V-rated input regulators and preserving system uptime in harsh vehicle environments. | Use Scenario: Shielding analog and digital signal lines (e.g., CAN, LIN, or thermistor inputs) in PLC I/O modules from ESD and field-induced noise. IC Role / Device Role / Timing Role: TVS mounted directly at connector entry points to shunt fast transients (<1 ns rise time) before propagation into precision ADC front-ends. Use Value: 1.0 μA leakage at 8.5 V avoids measurement offset errors in µA-level sensor bias networks while maintaining sub-15 V clamping. |
| Consumer Device USB Port Protection | Telecom Base Station Power Monitoring |
Use Scenario: Safeguarding USB VBUS and data lines in smart home hubs and set-top boxes against ESD (IEC 61000-4-2 ±15 kV) and hot-swap surges. IC Role / Device Role / Timing Role: Paired unidirectional TVS on VBUS and bidirectional on D+/D−; SMBG8.5AHE3/52 handles VBUS overvoltage due to adapter faults or backfeed. Use Value: 8.5 V VWM aligns with 5 V ±10% USB spec, enabling fail-safe clamping without false triggering during normal operation. | Use Scenario: Protecting voltage monitoring circuits in 48 V telecom rectifier modules exposed to lightning-induced surges on DC distribution buses. IC Role / Device Role / Timing Role: TVS placed across sense resistor inputs of isolated amplifiers to prevent saturation or latch-up during 600 W transient events. Use Value: 14.4 V clamping ensures amplifier common-mode input stays within its 20 V absolute maximum rating, avoiding measurement corruption or reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBG8.5A-E3/52 | Same electrical specs and SMBG package; differs only in qualification level - not AEC-Q101 certified | Approved for industrial but not automotive production; lacks automotive reliability test documentation | Select when AEC-Q101 compliance is not required and cost optimization is prioritized |
| SMAJ8.5AHE3/A | Same VWM/VBR/VC ratings but in smaller SMA (DO-214AC) package; 400 W PPPM vs. 600 W | Lower power handling limits suitability to lower-energy transients (e.g., IEC 61000-4-2 only) | Choose for space-constrained designs where 400 W surge margin is sufficient and footprint reduction is critical |
Compared with SMBG8.5AHE3/52, the E3/52 variant offers identical performance without automotive qualification, while the SMAJ8.5AHE3/A trades 33 % lower peak power for 30 % smaller board area - making SMBG8.5AHE3/52 optimal for AEC-Q101-compliant 600 W surge protection where thermal mass and layout space permit.
Availability
SMBG8.5AHE3/52 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, consumer USB power delivery systems, and telecom power monitoring circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBG8.5AHE3/52 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 protection devices with emphasis on reliability, efficiency, and application-specific validation.
The SMBG series was developed to deliver high-power, AEC-Q101-qualified TVS protection in compact surface-mount packages for automotive and industrial power and signal line applications demanding repeatable clamping performance.
FAQ
What is the clamping voltage of SMBG8.5AHE3/52 and how is it measured?
The SMBG8.5AHE3/52 has a maximum clamping voltage (VC) of 14.4 V, measured at a peak pulse current (IPPM) of 20 A using the standardized 10/1000 μs double-exponential waveform. This value reflects the actual voltage seen by protected circuitry during worst-case transient events and is guaranteed across temperature and production lot variations per Vishay's characterization methodology.
Is SMBG8.5AHE3/52 suitable for automotive applications?
Yes, SMBG8.5AHE3/52 is AEC-Q101 qualified and explicitly rated for automotive use. Its construction includes glass-passivated junctions, MSL Level 1 moisture sensitivity rating, and validated performance across -55 °C to +150 °C junction temperature range - meeting requirements for engine control, body electronics, and ADAS subsystems per the AEC-Q101 stress test schedule.
What does the "HE3" suffix mean in SMBG8.5AHE3/52?
The "HE3" suffix in SMBG8.5AHE3/52 indicates RoHS-compliant, matte tin-plated leads and AEC-Q101 qualification. "H" denotes AEC-Q101 compliance, "E3" specifies industrial-grade RoHS packaging with JESD 201 Class 2 whisker resistance, distinguishing it from non-automotive variants like SMBG8.5A-E3/52.
How does SMBG8.5AHE3/52 compare to bidirectional TVS diodes?
SMBG8.5AHE3/52 is unidirectional and intended for DC line protection where polarity is fixed (e.g., 12 V supply rails). Unlike bidirectional types (e.g., SMBG8.5CA), it conducts only in reverse breakdown and blocks forward current - eliminating risk of unintended conduction in polarized circuits and offering tighter VBR tolerance and lower leakage than equivalent bidirectional parts.
What PCB pad layout is recommended for SMBG8.5AHE3/52 to achieve rated 600 W performance?
To achieve the full 600 W peak pulse power rating, Vishay specifies mounting SMBG8.5AHE3/52 on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, with internal or external thermal vias recommended for sustained surge duty cycles. Deviation from this layout reduces thermal dissipation and de-rates IPPM and PPPM per Figure 2 in the datasheet.
SMBG8.5AHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AA, SMB Gull Wing
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 8.5V
- Voltage - Breakdown (Min):
- 9.44V
- Voltage - Clamping (Max) @ Ipp:
- 14.4V
- Current - Peak Pulse (10/1000µs):
- 41.7A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG8.5AHE3/52 FAQ
1.How can I place an order for SMBG8.5AHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG8.5AHE3/52 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 SMBG8.5AHE3/52 reliable?
The price and inventory of SMBG8.5AHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG8.5AHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBG8.5AHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG8.5AHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG8.5AHE3/52?
SMBG8.5AHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG8.5AHE3/52 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 SMBG8.5AHE3/52?
For technical support, including SMBG8.5AHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG8.5AHE3/52 requirements.
6.How does Aetrix verify that SMBG8.5AHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG8.5AHE3/52 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 SMBG8.5AHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBG8.5AHE3/52?
All SMBG8.5AHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG8.5AHE3/52, 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 SMBG8.5AHE3/52 part is unused and in its original packaging.
Return procedure for SMBG8.5AHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG8.5AHE3/52 Tags
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