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Vishay General Semiconductor - Diodes Division SMB8J9.0CAHE3_A/I
- Part No.:
- SMB8J9.0CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J9.0CAHE3_A/I.pdf
- Description:
- TVS DIODE 9VWM 15.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,745
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Product details
Overview
SMB8J9.0CAHE3_A/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on signal and power lines. It features a 9.0 V stand-off voltage (VWM), 15.4 V maximum clamping voltage (VC) at 20 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 μs waveform - optimized for automotive sensor interface and industrial I/O protection.
For engineers reviewing the SMB8J9.0CAHE3_A/I datasheet, SMB8J9.0CAHE3_A/I pinout, SMB8J9.0CAHE3_A/I application, or SMB8J9.0CAHE3_A/I equivalent, key selection criteria include AEC-Q101 qualification, bidirectional symmetry, low clamping ratio (VC/VWM = 1.71), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamping protector using an avalanche breakdown mechanism, with symmetrical bidirectional conduction enabling suppression of both positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at VWM), while MSL Level 1 rating supports lead-free reflow up to 260 °C.
The SMB8J9.0CAHE3_A/I delivers 800 W peak pulse power under standardized 10/1000 μs surge conditions, with thermal resistance RθJA = 72 °C/W and RθJL = 20 °C/W enabling effective heat dissipation in compact PCB layouts. It meets ANSI/IEEE C62.35 definitions for transient suppressors and is qualified per AEC-Q101 for automotive underhood and body electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 9.0 V - reverse stand-off voltage; defines maximum continuous operating voltage before significant leakage begins |
| VBR (min/max) | 10.0 V / 11.1 V at 1.0 mA - guaranteed breakdown onset range, ensuring predictable clamping initiation |
| VC @ IPPM | 15.4 V at 20 A - maximum clamped voltage during 10/1000 μs surge, limiting stress on downstream ICs |
| PPPM | 800 W - peak pulse power handling capability, defining robustness against lightning-induced or ESD-like surges |
| ID @ VWM | <1.0 μA - ultra-low reverse leakage, minimizing standby power loss and signal integrity impact |
| TJ max. | +150 °C - maximum junction temperature, supporting operation in under-hood automotive environments |
| AEC-Q101 | Qualified - validated for automotive reliability including temperature cycling, HTRB, and ESD testing |
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. No polarity marking - bidirectional construction eliminates cathode/anode orientation concerns during placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; bidirectional clamping enables single-device protection of AC or differential lines |
| Case (body) | Thermal and mechanical interface | Plastic molding meets UL 94 V-0; thermal path to PCB copper pads critical for sustaining 800 W pulses |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability across temperature cycling, humidity, and surge lifetime tests |
| MSL Level 1 | Compatible with standard lead-free reflow profiles up to 260 °C peak, no dry-pack required |
| Glass-passivated junction | Ensures stable VBR over time and temperature, reducing parameter drift in harsh environments |
| Low clamping ratio (VC/VWM) | 1.71 - tight voltage control minimizes overvoltage exposure to protected ICs like CAN transceivers or ADC inputs |
| UL 94 V-0 molding compound | Flame-retardant encapsulation meets safety standards for industrial and automotive enclosures |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting LIN/CAN bus nodes and analog sensor outputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt surge energy before reaching MCU or analog front-end. Use Value: 15.4 V clamping limits stress on 5 V or 3.3 V sensor supply rails and input pins, preserving signal fidelity during 100 V/500 ms load dump events. | Use Scenario: Safeguarding PLC digital input modules against field-wiring induced transients from relay coils or motor drives. IC Role / Device Role / Timing Role: Primary surge clamp on 24 V DC input lines, coordinated with series impedance to limit let-through current. Use Value: 800 W PPPM rating sustains repeated 1 kV/42 Ω surge events per IEC 61000-4-5, extending module service life in factory automation settings. |
| USB/Serial Data Line Protection | DC Power Rail Clamp |
Use Scenario: Shielding RS-232, RS-485, or USB VBUS lines from ESD and cable discharge events in medical or test equipment. IC Role / Device Role / Timing Role: Low-capacitance TVS placed adjacent to connector to absorb sub-100 ns ESD strikes before signal integrity degrades. Use Value: Symmetric bidirectional response ensures equal protection for both signal polarities without requiring dual unidirectional devices. | Use Scenario: Clamping 12 V or 24 V DC power inputs in embedded controllers exposed to inductive switching noise from solenoids or fans. IC Role / Device Role / Timing Role: Standoff-rated suppressor mounted between rail and ground, sized to handle 10/1000 μs surges up to 20 A. Use Value: 9.0 V VWM allows safe operation across nominal 12 V systems with ±10 % tolerance, while 15.4 V VC prevents brownout of downstream regulators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J9.0CAHM3_A/I | Halogen-free variant with identical electrical specs and AEC-Q101 qualification | No functional difference; selected when halogen-free compliance is mandated by OEM or regional regulations | Choose SMB8J9.0CAHM3_A/I if RoHS + halogen-free material declaration is required for final product certification |
| SMBJ9.0CAHE3_A/I | Same VWM/VC/IPPM but rated for 1000 W PPPM (unidirectional); bidirectional version has lower 800 W rating | Not suitable as direct replacement for bidirectional use cases; requires circuit redesign for polarity-aware placement | Select SMB8J9.0CAHE3_A/I only when bidirectional symmetry is essential; avoid SMBJ9.0CAHE3_A/I unless unidirectional topology is confirmed |
Compared with SMB8J9.0CAHE3_A/I, the SMB8J9.0CAHM3_A/I offers identical protection performance with halogen-free materials, while SMBJ9.0CAHE3_A/I provides higher unidirectional power rating but lacks true bidirectional symmetry - making it unsuitable for AC-coupled or differential line protection without layout changes.
Availability
SMB8J9.0CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, USB/serial data line protection, and DC power rail clamping requiring stable component supply and AEC-Q101 assurance.
Supply support for SMB8J9.0CAHE3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific optimization.
The SMB8Jx.xCA family targets high-reliability transient suppression in automotive and industrial environments, engineered for AEC-Q101 compliance, low clamping voltage, and robust surge handling in space-constrained SMB packages.
FAQ
What is the clamping voltage of SMB8J9.0CAHE3_A/I at its rated peak pulse current?
The SMB8J9.0CAHE3_A/I has a maximum clamping voltage (VC) of 15.4 V when subjected to its rated 20 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured at the device terminals with recommended 0.2" × 0.2" copper pad layout and confirms the device's ability to limit transient overvoltage to a safe level for downstream 3.3 V or 5 V ICs. The SMB8J9.0CAHE3_A/I maintains this clamping performance across its full operating temperature range.
Is SMB8J9.0CAHE3_A/I suitable for automotive applications?
Yes, SMB8J9.0CAHE3_A/I is AEC-Q101 qualified and specifically designed for automotive use, including engine control units, body electronics, and ADAS sensor interfaces. Its qualification covers temperature cycling, high-temperature reverse bias, and surge lifetime testing per automotive reliability standards. The SMB8J9.0CAHE3_A/I also meets MSL Level 1 for lead-free reflow and uses UL 94 V-0 molding compound - all documented in Vishay's official qualification report for this part number.
How does the bidirectional design of SMB8J9.0CAHE3_A/I affect circuit layout?
The SMB8J9.0CAHE3_A/I has symmetrical bidirectional conduction, meaning neither terminal is designated anode or cathode - eliminating polarity orientation requirements during PCB placement. This simplifies layout for AC-coupled lines, differential buses (e.g., RS-485), or any application where voltage transients may swing positive or negative relative to ground. Unlike unidirectional TVS diodes, the SMB8J9.0CAHE3_A/I requires no silkscreen polarity marking and tolerates reversed board orientation without functional impact.
What is the maximum reverse leakage current for SMB8J9.0CAHE3_A/I at its stand-off voltage?
The SMB8J9.0CAHE3_A/I exhibits a maximum reverse leakage current (ID) of 1.0 μA at its 9.0 V stand-off voltage (VWM), measured at 25 °C ambient. This ultra-low leakage ensures minimal power drain in battery-operated systems and avoids signal distortion on high-impedance sensor or communication lines. The SMB8J9.0CAHE3_A/I maintains leakage below 5.0 μA even at elevated temperatures up to +125 °C, as verified in Vishay's published thermal derating curves.
Can SMB8J9.0CAHE3_A/I be used in place of a unidirectional TVS diode?
No - SMB8J9.0CAHE3_A/I is strictly bidirectional and must not replace unidirectional TVS diodes in circuits relying on DC blocking or polarity-sensitive clamping, such as DC power rail protection with forward-biased rectification paths. While it provides equal clamping for both voltage polarities, it lacks the inherent DC blocking behavior of unidirectional devices. Substituting SMB8J9.0CAHE3_A/I for a unidirectional part like SMBJ9.0AHE3_A/I could cause unintended conduction or failure to suppress certain fault modes. Always verify topology compatibility before substitution.
SMB8J9.0CAHE3_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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 9V
- Voltage - Breakdown (Min):
- 10V
- Voltage - Clamping (Max) @ Ipp:
- 15.4V
- Current - Peak Pulse (10/1000µs):
- 51.9A
- Power - Peak Pulse:
- 800W
- 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)
SMB8J9.0CAHE3_A/I FAQ
1.How can I place an order for SMB8J9.0CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J9.0CAHE3_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 SMB8J9.0CAHE3_A/I reliable?
The price and inventory of SMB8J9.0CAHE3_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 SMB8J9.0CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMB8J9.0CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J9.0CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J9.0CAHE3_A/I?
SMB8J9.0CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J9.0CAHE3_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 SMB8J9.0CAHE3_A/I?
For technical support, including SMB8J9.0CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J9.0CAHE3_A/I requirements.
6.How does Aetrix verify that SMB8J9.0CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMB8J9.0CAHE3_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 SMB8J9.0CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMB8J9.0CAHE3_A/I?
All SMB8J9.0CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J9.0CAHE3_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 SMB8J9.0CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMB8J9.0CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J9.0CAHE3_A/I Tags
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