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Vishay General Semiconductor - Diodes Division SMB10J8.5A-E3/5B
- Part No.:
- SMB10J8.5A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J8.5A-E3/5B.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,992
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Product details
Overview
SMB10J8.5A-E3/5B 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 - used to safeguard automotive sensor interfaces and industrial I/O circuits against ESD and load dump transients.
For engineers reviewing the SMB10J8.5A-E3/5B datasheet, SMB10J8.5A-E3/5B pinout, SMB10J8.5A-E3/5B application, or SMB10J8.5A-E3/5B equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, RoHS-compliant matte tin plating, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a clamping device that remains non-conductive below VWM = 8.5 V and rapidly avalanches above VBR (min 9.44 V) to limit transient voltages. Its low incremental surge resistance and fast response time (<1 ns) enable effective suppression of inductive switching spikes and ESD events per IEC 61000-4-2 and ISO 16750-2.
The device is rated for TJ = –55 °C to +150 °C operation, features glass-passivated junction construction, and meets JESD201 Class 2 whisker resistance. Thermal resistance is RθJA = 72 °C/W (on 0.2" × 0.2" pads), supporting reliable power dissipation in compact automotive and industrial PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA; defines safe DC bias margin for protected line |
| VBR (min/max) | 9.44 V / 10.4 V at IT = 1 mA - guaranteed avalanche onset range; ensures consistent triggering across temperature and unit variation |
| VC @ IPPM | 14.4 V at 20 A - clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream ICs |
| PPPM | 1000 W - peak pulse power handling capability; enables robust protection against 100 A surge events when derated per fig. 2 |
| IFSM | 100 A - 8.3 ms half-sine forward surge rating; supports protection against automotive load dump without failure |
| Package | SMB (DO-214AA) - surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with standard reflow profiles and J-STD-020 MSL Level 1 |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; cathode indicated by color band on one end; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes conduction path during reverse-biased clamping |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., 12 V rail or sensor output); avalanche occurs between cathode and anode |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional clamping | Enables asymmetric protection on positive-rail systems without forward conduction during normal operation |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS modules requiring extended lifetime and thermal cycling endurance |
| MSL Level 1 rating | Permits unlimited floor life and standard reflow without baking; simplifies manufacturing logistics for high-volume SMT lines |
| Glass-passivated junction | Provides stable VBR tolerance and low leakage over 150 °C junction temperature and long-term operation |
| 1000 W peak pulse power | Supports single-event suppression of ISO 7637-2 Pulse 5a (load dump) up to 120 V/500 ms on 12 V systems |
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 battery transients and ESD in engine control units. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between sensor signal line and chassis ground to shunt surges before reaching precision amplifier inputs. Use Value: Limits induced voltage to ≤14.4 V during 20 A transients, preserving ADC reference integrity and preventing latch-up in 3.3 V/5 V interface ICs. |
Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers exposed to relay coil flyback and field wiring faults. IC Role / Device Role / Timing Role: Standoff device mounted at connector entry point to clamp negative-going spikes and positive surges on optocoupler input side. Use Value: Withstands 100 A 8.3 ms surges (IFSM) and maintains <1 µA leakage at 8.5 V, ensuring stable logic threshold detection under noisy factory conditions. |
| DC Power Rail Protection (12 V) | Consumer USB Port ESD Suppression |
|
Use Scenario: Secondary-level surge protection on automotive infotainment head-unit 12 V supply, downstream of primary fuse and filter. IC Role / Device Role / Timing Role: Fast-acting clamping element parallel to bulk capacitance to absorb residual energy after upstream TVS or varistor stages. Use Value: Delivers 1000 W peak power handling with 14.4 V clamping, limiting rail overshoot to safe levels for PMICs and microcontrollers during load dump events. |
Use Scenario: Board-level ESD protection on USB 2.0 VBUS and D+/D− lines in portable medical monitors and smart home hubs. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS placed adjacent to USB connector to divert ±15 kV contact discharge per IEC 61000-4-2. Use Value: Achieves sub-1 ns response and <1 µA leakage at 8.5 V, preventing false resets while maintaining signal integrity on high-speed data lines. |
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 VWM, VBR, and VC; identical SMB package but lower PPPM = 600 W (vs. 1000 W) | Not suitable for automotive load dump or high-energy industrial surges; limited to consumer-grade ESD and low-energy transients | Select SMB10J8.5A-E3/5B when 1000 W clamping capacity is required for ISO 7637-2 compliance or high-reliability industrial use. |
| SMCJ8.5A-E3/5B | Same electrical specs but larger SMC (DO-214AB) package; RθJA = 35 °C/W vs. 72 °C/W; higher IPPM = 119 A | Better thermal performance and surge margin, but requires 7.11 mm × 6.22 mm board area vs. 5.59 mm × 4.06 mm | Choose SMB10J8.5A-E3/5B where space-constrained PCBs demand SMB footprint without sacrificing 1000 W rating. |
Compared with SMBJ8.5A-E3/5B and SMCJ8.5A-E3/5B, SMB10J8.5A-E3/5B uniquely delivers 1000 W surge capability in the smallest qualified SMB outline, enabling AEC-Q101-compliant protection in tight automotive ECUs and miniaturized industrial sensors where both power density and qualification matter.
Availability
SMB10J8.5A-E3/5B is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC inputs, and DC power rail protection requiring stable component supply, AEC-Q101 traceability, and RoHS-compliant SMT assembly.
Supply support for SMB10J8.5A-E3/5B 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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, power density, and automotive qualification.
The SMB10J series is engineered for high-power-density transient suppression in space-constrained automotive and industrial environments, balancing 1000 W surge capability with MSL Level 1 manufacturability and AEC-Q101 validation.
FAQ
What is the clamping voltage of SMB10J8.5A-E3/5B at its rated peak pulse current?
The SMB10J8.5A-E3/5B 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 measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during transient events. The SMB10J8.5A-E3/5B maintains this clamping performance across its full operating temperature range and is validated per ANSI/IEEE C62.35 standards.
Is SMB10J8.5A-E3/5B qualified for automotive applications?
Yes, SMB10J8.5A-E3/5B is AEC-Q101 qualified when ordered with HE3 or HM3 suffixes; the -E3/5B variant is RoHS-compliant and commercial grade, but shares identical die and construction with AEC-Q101 versions. Its glass-passivated junction, 150 °C max junction temperature, and MSL Level 1 rating support deployment in automotive body electronics and ADAS sensor modules. For certified automotive use, specify SMB10J8.5AHE3_B/I.
What is the standoff voltage and leakage current specification for SMB10J8.5A-E3/5B?
The SMB10J8.5A-E3/5B has a stand-off voltage (VWM) of 8.5 V and a maximum reverse leakage current (ID) of 1.0 µA at VWM and 25 °C. This low leakage ensures minimal power loss and no interference with upstream voltage regulators or precision reference circuits. The SMB10J8.5A-E3/5B maintains leakage below 5 µA up to 125 °C, supporting stable operation in under-hood environments.
Can SMB10J8.5A-E3/5B be used in bidirectional configurations?
No, SMB10J8.5A-E3/5B is a unidirectional TVS diode, identifiable by its cathode band marking. Bidirectional variants (e.g., SMB8J8.5CA) exist in the same family but feature symmetrical breakdown in both polarities and no polarity marking. Using SMB10J8.5A-E3/5B in reverse-biased AC applications would result in forward conduction and failure; always verify polarity alignment during layout.
What is the thermal resistance and recommended pad layout for SMB10J8.5A-E3/5B?
The SMB10J8.5A-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. The recommended pad layout matches the DO-214AA outline: 0.086" (2.18 mm) min anode/cathode pad width, 0.220" (5.59 mm) overall length reference, and 0.060" (1.52 mm) min solder mask clearance. This layout ensures rated 1000 W pulse power handling and avoids thermal derating penalties.
SMB10J8.5A-E3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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-E3/5B FAQ
1.How can I place an order for SMB10J8.5A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J8.5A-E3/5B 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 SMB10J8.5A-E3/5B reliable?
The price and inventory of SMB10J8.5A-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J8.5A-E3/5B is usually 5 days.
3.What payment methods are accepted for SMB10J8.5A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J8.5A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J8.5A-E3/5B?
SMB10J8.5A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J8.5A-E3/5B 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 SMB10J8.5A-E3/5B?
For technical support, including SMB10J8.5A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J8.5A-E3/5B requirements.
6.How does Aetrix verify that SMB10J8.5A-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMB10J8.5A-E3/5B 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 SMB10J8.5A-E3/5B meets industry standards.
7.What is the process for return or replacement of SMB10J8.5A-E3/5B?
All SMB10J8.5A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J8.5A-E3/5B, 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 SMB10J8.5A-E3/5B part is unused and in its original packaging.
Return procedure for SMB10J8.5A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J8.5A-E3/5B Tags
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