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Vishay General Semiconductor - Diodes Division SMB10J8.5HE3/5B
- Part No.:
- SMB10J8.5HE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J8.5HE3/5B.pdf
- Description:
- TVS DIODE 8.5VWM 15.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,036
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Product details
Overview
SMB10J8.5HE3/5B from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy surge protection on power and signal lines. 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 1000 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive power supply rails and industrial sensor interfaces.
For engineers reviewing the SMB10J8.5HE3/5B datasheet, SMB10J8.5HE3/5B pinout, SMB10J8.5HE3/5B application, or SMB10J8.5HE3/5B equivalent, key selection criteria include clamping performance under 20 A surge, AEC-Q101 qualification for automotive use, RoHS-compliant matte tin plating, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a unidirectional clamping device, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its design targets transient suppression per IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and ISO 7637-2 (automotive load dump).
The SMB10J8.5HE3/5B is rated for -55 °C to +150 °C operating junction temperature, exhibits 1.0 µA max reverse leakage at 8.5 V, and delivers 14.4 V clamping at 20 A - enabling robust overvoltage protection without compromising signal integrity in 12 V automotive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - maximum continuous reverse working voltage; ensures no conduction during normal 12 V system operation. |
| VBR min/max | 9.44 V / 10.4 V at 1 mA - defines reliable turn-on threshold for transient clamping across process variation. |
| VC @ IPPM | 14.4 V at 20 A - clamping voltage limits downstream IC stress during 10/1000 µs surges in automotive environments. |
| PPPM | 1000 W - peak pulse power handling capacity with 10/1000 µs waveform; supports ISO 7637-2 Pulse 1 & 2b compliance. |
| ID @ VWM | 1.0 µA - ultra-low reverse leakage preserves battery drain budget in always-on vehicle modules. |
| TJ max | 150 °C - enables placement near heat-generating components in engine control units and ADAS ECUs. |
| Package | DO-214AA (SMB) - surface-mount outline with 2.13–2.44 mm body width; compatible with J-STD-020 MSL Level 1 reflow. |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with cathode band marking; matte tin-plated leads solderable per J-STD-002; 0.220" (5.59 mm) length, 0.130" (3.30 mm) width, 0.086" (2.18 mm) height; mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to ground or low-side return path; enables clamping when cathode voltage exceeds VBR. |
| Cathode | Reverse-biased terminal (marked with band) | Connected to protected line (e.g., 12 V rail); conducts surge current to ground during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for under-hood ECUs. |
| Glass passivated junction | Ensures stable VBR and low leakage over lifetime; resists humidity-induced degradation in harsh environments. |
| Low profile DO-214AA package | Enables high-density PCB layouts while maintaining thermal performance via 20 °C/W junction-to-lead resistance. |
| MSL Level 1 rating | Allows unlimited floor life and single reflow up to 260 °C peak - eliminates baking requirements in SMT production. |
| 1000 W peak pulse power | Handles repetitive load-dump transients in 12 V systems without parameter shift or failure. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V supply inputs of engine control units (ECUs) against ISO 7637-2 load dump pulses. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery feed and DC-DC input stage. Use Value: Limits transient voltage to ≤14.4 V during 35 V/100 ms load dump events, preventing damage to downstream regulators and microcontrollers. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loops) of pressure sensors in factory automation. IC Role / Device Role / Timing Role: Reverse-biased TVS connected across signal and ground to absorb EFT bursts per IEC 61000-4-4. Use Value: Maintains signal fidelity by clamping transients below 15 V while contributing only 1.0 µA leakage at 8.5 V operating bias. |
| Consumer USB Port ESD Protection | Telecom Power Supply Input Protection |
|
Use Scenario: Safeguarding VBUS line of USB 2.0 ports in set-top boxes against contact ESD per IEC 61000-4-2 ±15 kV. IC Role / Device Role / Timing Role: Unidirectional TVS placed in series with VBUS upstream of USB switch IC. Use Value: Responds in <1 ns to divert >15 kV ESD strikes while maintaining 8.5 V DC integrity and zero signal distortion on data lines. |
Use Scenario: Guarding primary-side inputs of AC-DC adapters used in VoIP phones against lightning-induced surges. IC Role / Device Role / Timing Role: Front-end TVS on bridge rectifier output to clamp differential-mode transients before bulk capacitor. Use Value: Absorbs 1000 W surges without degradation, ensuring adapter uptime in outdoor telecom cabinets exposed to induced surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.5A-E3/5B | Same electrical specs (VWM = 8.5 V, VC = 14.4 V), identical DO-214AA package, but lacks AEC-Q101 qualification. | Approved for commercial/industrial use only; not certified for automotive under-hood deployment. | Select when AEC-Q101 is not required and cost optimization is prioritized. |
| 1.5SMC8.5A | Higher package thermal resistance (RθJA = 110 °C/W vs. 72 °C/W); same VWM/VC but lower surge current rating (18.5 A vs. 20 A). | Less effective in high-ambient-temperature environments; requires larger copper area for thermal management. | Choose only if legacy 1.5SMC footprint is fixed and thermal derating is acceptable. |
Compared with SMBJ8.5A-E3/5B and 1.5SMC8.5A, the SMB10J8.5HE3/5B provides automotive-grade reliability without sacrificing clamping performance or board space - making it the optimal choice for new designs targeting OEM compliance and long-term field stability.
Availability
SMB10J8.5HE3/5B is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and consumer power interface designs requiring stable component supply, AEC-Q101 traceability, and RoHS-compliant manufacturing.
Supply support for SMB10J8.5HE3/5B 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, MOSFETs, optoelectronics, and passive components with emphasis on high-reliability and automotive-grade solutions.
The SMB10J series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-power-density transient suppression in space-constrained automotive and industrial applications where AEC-Q101 validation and low clamping voltage are critical.
FAQ
What is the clamping voltage of SMB10J8.5HE3/5B at its rated peak pulse current?
The SMB10J8.5HE3/5B has a maximum clamping voltage (VC) of 14.4 V at 20 A peak pulse current with a 10/1000 µs waveform. This value is measured under standardized test conditions and ensures predictable overvoltage limiting during surge events in 12 V systems. The SMB10J8.5HE3/5B maintains this clamping performance across its full operating temperature range of -55 °C to +150 °C.
Is SMB10J8.5HE3/5B qualified for automotive applications?
Yes, SMB10J8.5HE3/5B is AEC-Q101 qualified, meaning it has passed rigorous stress tests including temperature cycling, high-temperature reverse bias, and ESD immunity required for automotive electronic components. The "HE3" suffix explicitly denotes AEC-Q101 qualification, distinguishing it from commercial-grade variants like SMBJ8.5A-E3/5B. This makes SMB10J8.5HE3/5B suitable for engine control, ADAS, and body electronics modules.
What does the "5B" in SMB10J8.5HE3/5B indicate?
The "5B" suffix specifies the packaging configuration: 13-inch diameter plastic tape and reel, containing 3200 units per reel. This format supports high-volume automated SMT assembly. The "HE3" portion confirms RoHS compliance and AEC-Q101 qualification, while "SMB10J8.5" identifies the electrical variant with 8.5 V stand-off voltage. The full part number SMB10J8.5HE3/5B thus encodes qualification, environmental compliance, and logistics data in a single identifier.
How does SMB10J8.5HE3/5B compare to bi-directional TVS diodes with the same VWM?
Unlike bi-directional variants such as SMB8J8.5CA, the SMB10J8.5HE3/5B is unidirectional and offers higher peak pulse power (1000 W vs. 800 W) and greater peak pulse current (20 A vs. 40 A for bi-directional, but at lower energy density). Its unidirectional architecture provides tighter clamping and lower leakage (1.0 µA vs. up to 5.0 µA), making SMB10J8.5HE3/5B preferable for DC power rail protection where polarity is fixed and leakage sensitivity is high.
What is the thermal resistance of SMB10J8.5HE3/5B, and how does it affect layout?
The SMB10J8.5HE3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W. To maintain safe operation under repeated surges, PCB layout must use minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. Reducing pad size increases junction temperature, potentially derating peak power capability - a critical consideration in compact automotive modules where SMB10J8.5HE3/5B is commonly deployed.
SMB10J8.5HE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 8.5V
- Voltage - Breakdown (Min):
- 9.44V
- Voltage - Clamping (Max) @ Ipp:
- 15.9V
- Current - Peak Pulse (10/1000µs):
- 62.9A
- Power - Peak Pulse:
- 1000W (1kW)
- 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 (SMB)
SMB10J8.5HE3/5B FAQ
1.How can I place an order for SMB10J8.5HE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J8.5HE3/5B 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 SMB10J8.5HE3/5B reliable?
The price and inventory of SMB10J8.5HE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J8.5HE3/5B is usually 5 days.
3.What payment methods are accepted for SMB10J8.5HE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J8.5HE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J8.5HE3/5B?
SMB10J8.5HE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J8.5HE3/5B 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 SMB10J8.5HE3/5B?
For technical support, including SMB10J8.5HE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J8.5HE3/5B requirements.
6.How does Aetrix verify that SMB10J8.5HE3/5B is sourced from the original manufacturer or authorized distributors?
All SMB10J8.5HE3/5B 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 SMB10J8.5HE3/5B meets industry standards.
7.What is the process for return or replacement of SMB10J8.5HE3/5B?
All SMB10J8.5HE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J8.5HE3/5B, 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 SMB10J8.5HE3/5B part is unused and in its original packaging.
Return procedure for SMB10J8.5HE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J8.5HE3/5B Tags
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Diodes Incorporated
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Diodes Incorporated
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