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Vishay General Semiconductor - Diodes Division SMB10J8.5-E3/5B
- Part No.:
- SMB10J8.5-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J8.5-E3/5B.pdf
- Description:
- TVS DIODE 8.5VWM 15.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,012
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Product details
Overview
SMB10J8.5-E3/5B 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 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 (IPPM), and 1000 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive power supply rails and industrial sensor interfaces.
For engineers reviewing the SMB10J8.5-E3/5B datasheet, SMB10J8.5-E3/5B pinout, SMB10J8.5-E3/5B application, or SMB10J8.5-E3/5B equivalent, key selection criteria include clamping performance under 20 A surge, unidirectional polarity for DC-biased lines, RoHS-compliant matte tin terminations, and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR, it avalanches to divert transient energy away from downstream ICs. Its glass-passivated junction ensures stable breakdown and low leakage (<1.0 µA at VWM), while low incremental surge resistance enables rapid response to ESD and lightning-induced transients.
The device is rated for -55 °C to +150 °C operating junction temperature, with thermal resistance RθJA = 72 °C/W and RθJL = 20 °C/W, supporting robust thermal management on standard 5.0 mm × 5.0 mm copper pads. It meets MSL Level 1 per J-STD-020 and passes JESD201 Class 1A whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - maximum continuous reverse operating voltage before conduction begins; sets safe margin below system rail (e.g., 9–12 V automotive supplies) |
| VBR (min/max) | 9.44 V / 10.4 V at IT = 1 mA - defines precise avalanche onset window for predictable clamping behavior |
| VC @ IPPM | 14.4 V at IPPM = 20 A (10/1000 µs) - peak clamped voltage seen by protected circuit during worst-case surge |
| PPPM | 1000 W - total transient energy absorption capability; sufficient for ISO 7637-2 Pulse 1/2a/5a compliance in 12 V systems |
| ID @ VWM | ≤1.0 µA - ultra-low leakage preserves battery life and avoids false triggering in low-power sensor nodes |
| TJ max. | +150 °C - enables deployment in under-hood automotive environments and industrial enclosures without derating |
| Package | DO-214AA (SMB) - surface-mount footprint (5.21 mm × 4.06 mm) compatible with automated pick-and-place and reflow soldering |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with cathode band marking; matte tin-plated leads solderable per J-STD-002 and JESD22-B102; polarity indicated by single black band at cathode end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / surge return path | Connected to ground or low-impedance return plane; must handle 20 A transient without trace fusing |
| Cathode | Protected line connection | Connected to input rail (e.g., battery+, CAN_H); clamps to 14.4 V when overvoltage occurs |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics per stress test requirements |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift in harsh environments |
| MSL Level 1 rating | Allows unlimited floor life and reflow at peak 260 °C without moisture-related popcorn failure |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes voltage overshoot during surge events - critical for protecting 12 V logic-level interface ICs |
| RoHS-compliant & halogen-free | Meets JEDEC JS709A and EU Directive 2011/65/EU; supports green manufacturing and end-of-life recycling |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 12 V battery feed to engine control module exposed to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between VBAT and GND, clamping transients before they reach LDOs and microcontrollers. Use Value: Limits voltage to ≤14.4 V during 20 A surges, preventing latch-up or gate oxide damage in downstream 16 V-rated regulators. |
Use Scenario: Analog output line (0–5 V) from pressure sensor in factory automation PLC I/O module. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to absorb ESD (IEC 61000-4-2 ±8 kV contact) and inductive kickback from nearby solenoids. Use Value: Sub-1 µA leakage avoids signal offset error; 14.4 V clamping prevents op-amp input stage breakdown during 1 kV surge events. |
| Consumer USB Power Input Protection | Telecom DC Feeder Protection |
Use Scenario: 5 V USB-C power input on smart home hub subjected to hot-plug transients and cable ESD. IC Role / Device Role / Timing Role: Unidirectional TVS on VBUS line upstream of USB PD controller and buck converter. Use Value: 8.5 V VWM provides 3.5 V margin above 5 V nominal; fast avalanche response (<1 ns) limits overshoot to <15 V. |
Use Scenario: -48 V DC feeder line in telecom base station remote radio unit exposed to lightning-induced surges. IC Role / Device Role / Timing Role: TVS array element protecting PoE-like DC distribution bus against induced common-mode transients. Use Value: 1000 W PPPM handles multi-kA surge currents; DO-214AA package allows dense layout near feedthrough connectors. |
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-E3/5B | Identical electrical specs and DO-214AA package; same VWM, VBR, VC, and PPPM ratings. | No functional difference; both unidirectional, AEC-Q101 qualified, RoHS-compliant. | Select SMBJ8.5A-E3/5B if cross-referencing legacy Vishay part numbering; SMB10J8.5-E3/5B reflects updated family designation but shares full form-fit-function. |
| 1.5SMC8.5A | Same VWM/VBR/VC specs but in larger DO-214AB (SMC) package (7.11 mm × 6.22 mm); higher thermal mass but requires more PCB area. | Preferred where higher sustained power dissipation or board-level thermal relief is needed; not suitable for space-constrained layouts. | Choose 1.5SMC8.5A only when thermal derating below 72 °C/W is required; otherwise SMB10J8.5-E3/5B offers superior power density. |
Compared with SMBJ8.5A-E3/5B, SMB10J8.5-E3/5B is functionally identical and interchangeable; versus 1.5SMC8.5A, it delivers equal protection in 40% less PCB area but with lower thermal inertia - optimal for compact automotive and portable electronics designs.
Availability
SMB10J8.5-E3/5B is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and consumer USB power input circuits requiring stable component supply across production lifecycles.
Supply support for SMB10J8.5-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, efficiency, and automotive-grade qualification.
The SMB10J series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density transient suppression in automotive, industrial, and telecom infrastructure where space, thermal performance, and AEC-Q101 compliance are critical.
FAQ
What is the clamping voltage of SMB10J8.5-E3/5B at its rated peak pulse current?
The SMB10J8.5-E3/5B has a maximum clamping voltage (VC) of 14.4 V when subjected to a 20 A peak pulse current with a 10/1000 µs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on the protected circuit during surge events - a key parameter for ensuring downstream ICs remain within their absolute maximum ratings. The SMB10J8.5-E3/5B achieves this clamping performance while maintaining low leakage and fast response.
Is SMB10J8.5-E3/5B suitable for automotive applications?
Yes, SMB10J8.5-E3/5B is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments with operating junction temperatures up to +150 °C. Its glass-passivated junction, MSL Level 1 rating, and JESD201 Class 1A whisker resistance make it suitable for engine control units, body control modules, and ADAS sensor interfaces. The SMB10J8.5-E3/5B meets stringent reliability requirements without derating in typical 12 V vehicle electrical systems.
What does the "E3/5B" suffix indicate in SMB10J8.5-E3/5B?
The "E3" suffix denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads meeting J-STD-002 solderability and JESD201 Class 1A whisker resistance. The "5B" indicates packaging in 13-inch diameter plastic tape and reel, with a base quantity of 3200 units per reel - optimized for high-volume SMT assembly. This configuration ensures consistent feeding in automated placement equipment and traceable lot control for SMB10J8.5-E3/5B deliveries.
How does SMB10J8.5-E3/5B differ from bi-directional TVS diodes like SMB8J8.5CA?
SMB10J8.5-E3/5B is unidirectional and intended for DC-biased lines (e.g., VBAT, USB VBUS), offering 1000 W peak pulse power. In contrast, SMB8J8.5CA is bi-directional with symmetrical breakdown, rated for 800 W and used in AC-coupled or floating signal paths (e.g., RS-485, audio). The SMB10J8.5-E3/5B has lower clamping impedance in forward surge mode and includes anode/cathode polarity marking - a distinction critical for correct placement in SMB10J8.5-E3/5B applications.
What is the thermal resistance of SMB10J8.5-E3/5B, and how does it affect layout design?
SMB10J8.5-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. This value assumes standard PCB layout per Vishay's recommended pad dimensions. To maintain safe junction temperature under repeated surges, designers must ensure adequate copper area and avoid excessive trace length - especially for the cathode connection, where SMB10J8.5-E3/5B conducts peak current. Thermal vias under pads further reduce RθJA.
SMB10J8.5-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:
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB10J8.5-E3/5B FAQ
1.How can I place an order for SMB10J8.5-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J8.5-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 SMB10J8.5-E3/5B reliable?
The price and inventory of SMB10J8.5-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 SMB10J8.5-E3/5B is usually 5 days.
3.What payment methods are accepted for SMB10J8.5-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J8.5-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J8.5-E3/5B?
SMB10J8.5-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J8.5-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 SMB10J8.5-E3/5B?
For technical support, including SMB10J8.5-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J8.5-E3/5B requirements.
6.How does Aetrix verify that SMB10J8.5-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMB10J8.5-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 SMB10J8.5-E3/5B meets industry standards.
7.What is the process for return or replacement of SMB10J8.5-E3/5B?
All SMB10J8.5-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J8.5-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 SMB10J8.5-E3/5B part is unused and in its original packaging.
Return procedure for SMB10J8.5-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J8.5-E3/5B Tags
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