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Vishay General Semiconductor - Diodes Division SMB10J8.5AHE3_A/I
- Part No.:
- SMB10J8.5AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J8.5AHE3_A/I.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,604
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Product details
Overview
SMB10J8.5AHE3_A/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection with 1000 W peak pulse power (10/1000 µs), 8.5 V stand-off voltage, and 14.4 V clamping voltage at 20 A peak pulse current. It is AEC-Q101 qualified and used to protect automotive sensor signal lines and MOSFET gate drivers against inductive switching transients.
For engineers reviewing the SMB10J8.5AHE3_A/I datasheet, SMB10J8.5AHE3_A/I pinout, SMB10J8.5AHE3_A/I application, or SMB10J8.5AHE3_A/I equivalent, key selection criteria include clamping voltage vs. protected IC's absolute maximum rating, junction temperature derating above 25 °C, IPPM capability under real-world surge waveforms, and AEC-Q101 qualification status for automotive deployment.
Technical Context
This TVS operates as a unidirectional avalanche diode with glass-passivated junction, optimized for fast response (<1 ns) to ESD and lightning-induced transients. Its low incremental surge resistance ensures minimal voltage overshoot during high-current surges, while MSL Level 1 reflow compatibility supports automated SMT assembly without moisture sensitivity concerns.
The device features a 9.44–10.4 V breakdown voltage range at 1 mA test current, 1.0 µA max reverse leakage at 8.5 V, and thermal resistance of 72 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads - enabling reliable operation up to +150 °C junction temperature in compact automotive PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - Maximum continuous reverse operating voltage before significant leakage; sets upper limit for protected circuit's normal operating rail. |
| VBR min/max | 9.44 V / 10.4 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on margin above VWM. |
| VC @ IPPM | 14.4 V at 20 A - Clamped voltage during 10/1000 µs surge; must stay below protected IC's absolute maximum input rating. |
| PPPM | 1000 W - Peak pulse power handling capacity; defines survivability against ISO 7637-2 Pulse 1/2a/5a transients in automotive systems. |
| IPPM | 20 A - Peak pulse current supported at rated clamping voltage; correlates directly with system-level surge energy (E = ∫v·i dt). |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments with minimal thermal derating. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JESD22-A114. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to protected line's ground or low-side return path; conducts during positive transients when cathode is biased higher. |
| Cathode | Avalanche clamping terminal | Connected to protected signal/power line; clamps voltage to ≤14.4 V when transient exceeds 9.44 V. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable breakdown voltage over lifetime and immunity to humidity-induced parameter drift in automotive under-hood conditions. |
| MSL Level 1 rating | Allows unlimited floor life and single-reflow processing at 260 °C peak without baking, reducing manufacturing complexity and cost. |
| Low incremental surge resistance | Minimizes dynamic impedance during surge events, reducing clamping voltage overshoot and improving protection margin for sensitive ICs. |
| AEC-Q101 qualification | Validates robustness for automotive applications including engine control units, ADAS sensors, and body electronics modules. |
Applications
| Automotive Sensor Protection | Power Supply Rail Clamping |
|---|---|
Use Scenario: Protecting LIN bus or analog sensor outputs (e.g., temperature, pressure) from load-dump and inductive kickback in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and ground, absorbing negative-going transients and clamping positive surges to ≤14.4 V. Use Value: Prevents latch-up or permanent damage to 12 V-tolerant sensor interface ICs while maintaining signal integrity during normal operation at 5–8 V DC. | Use Scenario: Safeguarding 12 V automotive power rails feeding microcontrollers or CAN transceivers against ISO 7637-2 Pulse 5a (load dump). IC Role / Device Role / Timing Role: Parallel-connected clamping device across input rail, conducting only during >9.44 V overvoltage events. Use Value: Limits rail voltage to 14.4 V during 1000 W surges, enabling use of lower-voltage-rated downstream regulators and reducing BOM cost. |
| MOSFET Gate Driver Protection | Industrial I/O Interface Protection |
Use Scenario: Shielding high-side N-channel MOSFET gate drivers from shoot-through-inducing voltage spikes during switching transitions. IC Role / Device Role / Timing Role: Placed between gate and source, clamping gate-source voltage to prevent oxide breakdown during dv/dt-induced coupling. Use Value: Maintains gate drive integrity with <1 ns response, avoiding false turn-on and ensuring reliable motor control in 48 V mild-hybrid systems. | Use Scenario: Hardening RS-485 or CAN FD transceiver inputs in factory automation equipment exposed to relay coil flyback and ESD. IC Role / Device Role / Timing Role: Bidirectional-capable variant not applicable; this unidirectional part used on receiver VCC-referenced lines where polarity is fixed. Use Value: Provides 1000 W surge immunity without adding capacitance that would degrade 10 Mbps data rates - junction capacitance not specified but typical for SMB package is <100 pF. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.5A-E3/52 | Same SMB package, identical VWM/VC, but commercial-grade (non-AEC-Q101) and RoHS-compliant only. | Lacks automotive qualification; suitable for industrial/commercial designs where AEC-Q101 is not mandated. | Select when cost sensitivity outweighs automotive compliance requirements and long-term supply continuity is assured. |
| SMCJ8.5AHE3_A/I | Same electrical specs but larger SMC (DO-214AB) package offering 1500 W PPPM and lower RθJA (50 °C/W). | Requires larger PCB footprint; preferred where higher surge margin or improved thermal performance is needed. | Choose when system-level surge testing exceeds 1000 W or ambient temperatures exceed 105 °C. |
Compared with SMBJ8.5A-E3/52, SMB10J8.5AHE3_A/I adds AEC-Q101 qualification and tighter process controls for automotive use; versus SMCJ8.5AHE3_A/I, it trades 500 W extra surge capacity and better thermal dissipation for 30% smaller board area - critical in space-constrained ADAS modules.
Availability
SMB10J8.5AHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor protection, power rail clamping, and MOSFET gate driver hardening requiring stable component supply across production lifecycles.
Supply support for SMB10J8.5AHE3_A/I 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, and protection devices with emphasis on high-reliability, automotive-qualified components.
The SMB10J series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-power-density transient suppression in automotive and industrial environments where space, thermal performance, and qualification rigor are critical.
FAQ
What is the clamping voltage of SMB10J8.5AHE3_A/I at its rated peak pulse current?
The SMB10J8.5AHE3_A/I has a maximum clamping voltage (VC) of 14.4 V at 20 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured and guaranteed per Vishay Document Number 88422, ensuring predictable overvoltage limiting for protected circuits. The SMB10J8.5AHE3_A/I maintains this clamping performance across its full operating temperature range from -55 °C to +150 °C.
Is SMB10J8.5AHE3_A/I suitable for automotive applications?
Yes, SMB10J8.5AHE3_A/I is AEC-Q101 qualified per the Vishay datasheet (Rev. 09-Jan-2024), confirming its suitability for automotive applications including engine control, ADAS sensors, and body electronics. The "HE3" suffix denotes RoHS-compliant and AEC-Q101 qualified construction, and the device meets MSL Level 1 reflow requirements. SMB10J8.5AHE3_A/I is explicitly recommended for protecting automotive sensor signal lines and power rails against ISO 7637-2 transients.
What is the standoff voltage (VWM) and why does it matter for SMB10J8.5AHE3_A/I?
The standoff voltage (VWM) of SMB10J8.5AHE3_A/I is 8.5 V - the maximum DC or continuous reverse voltage the device can withstand without entering avalanche conduction. This parameter ensures the SMB10J8.5AHE3_A/I remains non-conductive during normal operation, minimizing leakage and power loss. Selecting VWM ≥ 1.1× the protected circuit's maximum operating voltage prevents false triggering while preserving sufficient margin to VBR (9.44–10.4 V).
How does the SMB10J8.5AHE3_A/I package compare to standard SMB diodes in terms of thermal performance?
The SMB10J8.5AHE3_A/I uses the SMB (DO-214AA) package with a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on 0.2" × 0.2" copper pads - matching industry-standard SMB thermal behavior. Its glass-passivated junction and matte tin plating ensure consistent solder wetting and long-term thermal stability. Unlike some legacy SMB diodes, the SMB10J8.5AHE3_A/I is characterized for derating above 25 °C per Figure 2 in the datasheet, enabling accurate thermal design in automotive under-hood environments.
Can SMB10J8.5AHE3_A/I replace bidirectional TVS diodes in circuit designs?
No, SMB10J8.5AHE3_A/I is strictly unidirectional and must not be substituted for bidirectional TVS diodes (e.g., SMB8J8.5CA) without circuit redesign. Its cathode-band polarity requires connection with cathode to the protected line and anode to ground - it cannot suppress negative transients on floating or AC-coupled lines. Using SMB10J8.5AHE3_A/I in place of a bidirectional device risks failure during reverse-polarity surges. Always verify signal polarity and transient direction before selecting SMB10J8.5AHE3_A/I.
SMB10J8.5AHE3_A/I 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:
- 14.4V
- Current - Peak Pulse (10/1000µs):
- 69.4A
- 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)
SMB10J8.5AHE3_A/I FAQ
1.How can I place an order for SMB10J8.5AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J8.5AHE3_A/I 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 SMB10J8.5AHE3_A/I reliable?
The price and inventory of SMB10J8.5AHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J8.5AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMB10J8.5AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J8.5AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J8.5AHE3_A/I?
SMB10J8.5AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J8.5AHE3_A/I 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 SMB10J8.5AHE3_A/I?
For technical support, including SMB10J8.5AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J8.5AHE3_A/I requirements.
6.How does Aetrix verify that SMB10J8.5AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMB10J8.5AHE3_A/I 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 SMB10J8.5AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMB10J8.5AHE3_A/I?
All SMB10J8.5AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J8.5AHE3_A/I, 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 SMB10J8.5AHE3_A/I part is unused and in its original packaging.
Return procedure for SMB10J8.5AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J8.5AHE3_A/I Tags
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