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Vishay General Semiconductor - Diodes Division SMB10J8.5A-E3/52
- Part No.:
- SMB10J8.5A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J8.5A-E3/52.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMB10J8.5A-E3/52 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on DC power rails 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 sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB10J8.5A-E3/52 datasheet, SMB10J8.5A-E3/52 pinout, SMB10J8.5A-E3/52 application, or SMB10J8.5A-E3/52 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 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents <1 µA reverse leakage at 8.5 V, then rapidly avalanches when transients exceed its 9.44–10.4 V breakdown threshold to clamp the line at ≤14.4 V. Its glass-passivated junction ensures stable performance across -55 °C to +150 °C operating range and meets MSL Level 1 reflow requirements (260 °C peak).
The device delivers 1000 W peak pulse power handling per 10/1000 µs waveform with 20 A peak surge current capability, supported by low thermal resistance (RθJL = 20 °C/W) and optimized for fast response (<1 ns) to ESD and load-switching transients - critical for safeguarding MOSFET gates and microcontroller I/O pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 8.5 V - maximum continuous reverse voltage before significant leakage; sets operating margin below breakdown |
| VBR (Breakdown Voltage) | 9.44–10.4 V at 1 mA - precise avalanche onset threshold defining protection activation point |
| VC (Clamping Voltage) | 14.4 V at 20 A IPPM - maximum voltage seen by protected circuit during full-rated surge event |
| PPPM (Peak Pulse Power) | 1000 W (10/1000 µs) - energy-handling capacity for transient suppression without failure |
| IPPM (Peak Pulse Current) | 20 A - maximum non-repetitive surge current the device safely clamps without degradation |
| TJmax | +150 °C - enables reliable operation in under-hood automotive and industrial ambient environments |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile plastic case with matte tin-plated leads; cathode indicated by color band; UL 94 V-0 rated molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to protected line's lower-potential side | When used for DC rail protection, anode ties to ground or return path; defines unidirectional conduction direction |
| Cathode | Current exit terminal in forward bias; marked with color band; higher-potential connection point | Connected to the line being protected (e.g., 12 V supply or sensor output); conducts surge current to ground during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional polarity with cathode band marking | Enables precise orientation during automated placement and guarantees correct clamping direction on positive-rail circuits |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| MSL Level 1 moisture sensitivity | Allows standard SMT reflow without baking; compatible with 260 °C peak profile per J-STD-020 |
| RoHS-compliant, halogen-free option available | E3 suffix denotes commercial-grade RoHS compliance; supports environmental compliance in consumer and industrial BOMs |
| Low incremental surge resistance | Minimizes VC overshoot during fast transients, improving protection margin for downstream ICs |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital Input Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between signal line and chassis ground, responding within <1 ns to clamp spikes up to 1000 W. Use Value: Prevents latch-up or gate oxide damage in 3.3 V/5 V sensor interface ICs by limiting excursion to ≤14.4 V during 20 A surges. |
Use Scenario: Safeguarding 24 V digital input channels of programmable logic controllers against inductive kickback from solenoid/relay switching. IC Role / Device Role / Timing Role: Standoff-mode protector mounted directly at connector entry, conducting only during >9.44 V transients while remaining high-impedance otherwise. Use Value: Maintains signal integrity during normal operation (<1 µA leakage at 8.5 V) while absorbing 1000 W surges without derating at 85 °C ambient. |
| DC Power Rail Protection (12 V) | USB/Serial Port ESD Protection |
|
Use Scenario: Secondary overvoltage protection on 12 V supply lines feeding microcontrollers and PMICs in infotainment head units. IC Role / Device Role / Timing Role: Parallel-connected clamping device that activates after primary fuse or polyfuse, providing low-impedance path to ground during load dump events. Use Value: Clamps 12 V rail to ≤14.4 V during 20 A transients, preserving downstream regulator input specs and avoiding brownout resets. |
Use Scenario: Board-level ESD protection for RS-232/RS-485 transceivers and USB VBUS lines in industrial gateways and test equipment. IC Role / Device Role / Timing Role: Fast-response TVS placed adjacent to connector, diverting IEC 61000-4-2 ±8 kV contact discharge away from PHY IC pins. Use Value: Achieves sub-1 ns response with 14.4 V clamping, preventing damage to 5 V tolerant transceiver inputs while supporting automated optical inspection (AOI) due to low-profile SMB package. |
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-E3/52 | Same electrical specs (VWM, VBR, VC, PPPM), identical SMB package, but part of SMBJ series with tighter VBR tolerance (5%) vs. SMB10J's 10% | Preferred where tighter breakdown consistency is required across production lots, e.g., precision power monitoring circuits | Select SMBJ8.5A-E3/52 if VBR matching across units is critical; SMB10J8.5A-E3/52 offers cost advantage for general-purpose protection |
| 1.5SMC8.5A | Higher package thermal mass (SMC/DO-214AB), 1500 W PPPM rating, same VWM/VC, but larger footprint and 2× weight | Suitable for high-reliability 24 V systems requiring extended surge endurance beyond 1000 W, such as railway control modules | Choose 1.5SMC8.5A only when PCB layout allows larger SMC footprint and higher energy absorption is mandatory; not drop-in compatible |
Compared with SMBJ8.5A-E3/52 and 1.5SMC8.5A, SMB10J8.5A-E3/52 balances AEC-Q101 qualification, compact SMB footprint, and 1000 W surge capability - making it optimal for space-constrained automotive and industrial designs where cost and manufacturability are prioritized over ultra-tight VBR tolerance or extreme energy handling.
Availability
SMB10J8.5A-E3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC digital inputs, and 12 V DC power rail protection requiring stable component supply, AEC-Q101 compliance, and SMT-ready packaging.
Supply support for SMB10J8.5A-E3/52 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, TVS devices, and optoelectronics with emphasis on reliability, power efficiency, and automotive-grade validation.
The SMB10J series is engineered specifically for high-power-density transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness, fast response, and AEC-Q101 certification are mandatory.
FAQ
What is the clamping voltage of SMB10J8.5A-E3/52 at its rated peak pulse current?
The SMB10J8.5A-E3/52 has a maximum clamping voltage (VC) of 14.4 V at 20 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is guaranteed per Vishay's datasheet (Document Number: 88422, Rev. 09-Jan-2024) and represents the upper voltage limit imposed on the protected line during full-rated surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SMB10J8.5A-E3/52 qualified for automotive applications?
Yes, SMB10J8.5A-E3/52 is AEC-Q101 qualified when ordered with the HE3 suffix (e.g., SMB10J8.5AHE3_B/H). The E3/52 variant itself is RoHS-compliant and commercial-grade; however, the HE3 automotive-grade version shares identical electrical specs and SMB package, enabling direct substitution in qualified designs with full stress-test documentation from Vishay.
What is the standoff voltage and maximum leakage current for SMB10J8.5A-E3/52 at room temperature?
The SMB10J8.5A-E3/52 has a stand-off voltage (VWM) of 8.5 V and a maximum reverse leakage current (ID) of 1.0 µA at VWM and TA = 25 °C. This low leakage ensures minimal power loss and signal interference in always-on circuits such as automotive wake-up lines or battery-backed sensors.
Can SMB10J8.5A-E3/52 be used in bidirectional configurations?
No - SMB10J8.5A-E3/52 is strictly unidirectional, as indicated by its "J" (not "JCA") designation and cathode band marking. For bidirectional protection at 8.5 V standoff, the functionally matched part is SMB8J8.5CA-E3/52, which provides symmetrical clamping for AC-coupled or floating signal lines like RS-485 or Ethernet PHYs.
What is the thermal resistance and maximum junction temperature of SMB10J8.5A-E3/52?
The SMB10J8.5A-E3/52 has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W and a maximum junction temperature (TJmax) of +150 °C. These values enable reliable operation in high-ambient environments when mounted on recommended 5.0 mm × 5.0 mm copper pads, supporting sustained surge duty cycles in industrial motor drives and automotive body control modules.
SMB10J8.5A-E3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- 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):
- 69.4A
- Power - Peak Pulse:
- 1000W (1kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB10J8.5A-E3/52 FAQ
1.How can I place an order for SMB10J8.5A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J8.5A-E3/52 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 SMB10J8.5A-E3/52 reliable?
The price and inventory of SMB10J8.5A-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J8.5A-E3/52 is usually 5 days.
3.What payment methods are accepted for SMB10J8.5A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J8.5A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J8.5A-E3/52?
SMB10J8.5A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J8.5A-E3/52 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 SMB10J8.5A-E3/52?
For technical support, including SMB10J8.5A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J8.5A-E3/52 requirements.
6.How does Aetrix verify that SMB10J8.5A-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMB10J8.5A-E3/52 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 SMB10J8.5A-E3/52 meets industry standards.
7.What is the process for return or replacement of SMB10J8.5A-E3/52?
All SMB10J8.5A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J8.5A-E3/52, 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 SMB10J8.5A-E3/52 part is unused and in its original packaging.
Return procedure for SMB10J8.5A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J8.5A-E3/52 Tags
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