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Vishay General Semiconductor - Diodes Division SMB8J9.0CAHM3_A/I
- Part No.:
- SMB8J9.0CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J9.0CAHM3_A/I.pdf
- Description:
- TVS DIODE 9VWM 15.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMB8J9.0CAHM3_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 SMB8J9.0CAHM3_A/I datasheet, SMB8J9.0CAHM3_A/I pinout, SMB8J9.0CAHM3_A/I application, or SMB8J9.0CAHM3_A/I equivalent, this device delivers AEC-Q101 qualified transient suppression for CAN, LIN, and analog sensor lines where low-leakage (<1 µA at VWM), fast response (<1 ns), and stable clamping under repetitive surges are critical selection criteria.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) of 10.0–11.1 V at 1.0 mA test current and clamps transients to ≤15.4 V at 20 A IPPM. Its low incremental surge resistance ensures minimal voltage overshoot during ESD and lightning-induced surges.
Thermal performance is defined by RθJA = 72 °C/W and RθJL = 20 °C/W, enabling reliable operation up to TJ = +150 °C. The device meets J-STD-020 MSL Level 1 and is halogen-free, RoHS-compliant, and qualified to AEC-Q101 for automotive under-hood and body electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 9.0 V - maximum continuous reverse operating voltage before clamping begins; sets safe margin above 5 V or 9 V rail systems. |
| VBR min/max | 10.0 / 11.1 V at IT = 1.0 mA - defines precise breakdown threshold for predictable turn-on during overvoltage events. |
| VC @ IPPM | 15.4 V at IPPM = 20 A (10/1000 µs) - peak clamped voltage seen by protected circuit; enables robust IC-level protection. |
| PPPM | 800 W - total transient energy absorption capability; supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge compliance. |
| ID @ VWM | <1.0 µA - ultra-low leakage preserves signal integrity and battery life in always-on sensor interfaces. |
| TJ max | +150 °C - enables deployment in engine control units, motor drivers, and other high-temperature automotive zones. |
| Package | SMB (DO-214AA) - surface-mount footprint (5.59 mm × 3.94 mm) compatible with automated assembly and IPC-7351B land patterns. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; polarity-unmarked for bidirectional operation per JEDEC standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically; no polarity marking required - simplifies PCB layout and eliminates orientation errors. |
| Case (body) | Thermal and mechanical interface | Plastic body provides UL 94 V-0 flammability rating; copper pad mounting (0.2" × 0.2") achieves specified RθJA = 72 °C/W. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including powertrain, chassis, and ADAS sensors - supports PPAP and long-term reliability requirements. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and JESD201 Class 2 whisker resistance - suitable for green manufacturing and export compliance. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage stress on downstream ICs - critical for protecting 3.3 V or 5 V logic interfaces without derating margins. |
| MSL Level 1 (260 °C peak) | Enables single-reflow soldering without moisture sensitivity concerns - reduces production yield risk and handling overhead. |
| 800 W peak pulse power | Handles repeated 10/1000 µs surges up to 20 A - exceeds ISO 7637-2 Pulse 1/2/5a/b and IEC 61000-4-5 requirements. |
Applications
| Automotive Sensor Interface | Industrial Analog I/O Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and temperature/pressure sensor outputs in engine control modules exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt transients before reaching MCU or analog front-end. Use Value: Maintains signal fidelity below 1 µA leakage while clamping surges to ≤15.4 V - prevents latch-up and parametric drift in 12 V automotive systems. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog inputs on PLC analog input modules subjected to field wiring surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on differential analog input pins, coordinated with series impedance and filtering. Use Value: Enables robust immunity to IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) without degrading DC accuracy or bandwidth. |
| Automotive Body Electronics | Consumer Appliance Motor Control |
Use Scenario: Protecting door module microcontrollers and LED driver ICs from electrostatic discharge and relay coil flyback in smart lighting systems. IC Role / Device Role / Timing Role: Secondary-level TVS placed adjacent to IC power pins and communication lines (CAN/LIN) to absorb localized transients. Use Value: AEC-Q101 qualification ensures 15-year operational life under thermal cycling and vibration - critical for warranty-critical body ECUs. |
Use Scenario: Shielding BLDC motor driver gate drivers and Hall-effect position sensors from commutation spikes in washing machine and HVAC fan controllers. IC Role / Device Role / Timing Role: Fast-response clamping device on low-voltage control rails (e.g., 15 V gate drive supply) to prevent false triggering or latch-up. Use Value: 15.4 V clamping voltage limits gate-source overvoltage on 20 V-rated MOSFETs - avoids destructive avalanche and improves system MTBF. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J9.0CAHE3_A/I | Same electrical specs, but RoHS-compliant without halogen restriction; not AEC-Q101 qualified. | Acceptable for commercial/industrial use only; unsuitable for automotive PPAP or safety-critical modules. | Select when halogen-free requirement is absent and automotive qualification is unnecessary. |
| SMAJ9.0CA | Lower PPPM (400 W), higher VC (16.7 V at 12.3 A), SMA package (smaller footprint, higher RθJA). | Limited to lower-energy surges; less effective in high-temperature enclosures or high-repetition-rate environments. | Choose only for space-constrained designs where 800 W surge capacity is not required. |
Compared with SMB8J9.0CAHE3_A/I, the SMB8J9.0CAHM3_A/I adds halogen-free compliance and AEC-Q101 validation - essential for Tier 1 automotive sourcing. Against SMAJ9.0CA, it delivers double the surge power and tighter clamping, enabling higher system-level EMC margin without board redesign.
Availability
SMB8J9.0CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial analog I/O hardening, and consumer appliance motor control requiring stable component supply across multi-year production cycles.
Supply support for SMB8J9.0CAHM3_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, TVS devices, and optoelectronics with emphasis on reliability, power density, and automotive-grade qualification.
The SMB8Jx.xCA series targets high-reliability transient suppression in harsh environments - engineered specifically for AEC-Q101 compliance, low-clamp performance, and seamless integration into automated SMT lines.
FAQ
What is the maximum clamping voltage of SMB8J9.0CAHM3_A/I at its rated peak pulse current?
The SMB8J9.0CAHM3_A/I clamps to a maximum of 15.4 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 surge events - critical for ensuring compatibility with 12 V or 15 V logic and analog components downstream of the SMB8J9.0CAHM3_A/I.
Is SMB8J9.0CAHM3_A/I suitable for automotive applications requiring AEC-Q101 qualification?
Yes, SMB8J9.0CAHM3_A/I is explicitly AEC-Q101 qualified per the Vishay datasheet (Document Number: 88422, Revision: 09-Jan-2024). The "HM3" suffix denotes halogen-free, RoHS-compliant, and AEC-Q101 validated construction - making SMB8J9.0CAHM3_A/I appropriate for engine control units, body electronics, and ADAS sensor modules where automotive-grade reliability is mandatory.
What does the "CA" suffix indicate in SMB8J9.0CAHM3_A/I?
The "CA" suffix in SMB8J9.0CAHM3_A/I designates a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SMB8J9.0AHM3_A/I), SMB8J9.0CAHM3_A/I has no cathode marking and functions identically regardless of polarity, simplifying layout for AC-coupled or differential signal lines.
What is the standoff voltage (VWM) and why is it important for SMB8J9.0CAHM3_A/I?
The standoff voltage (VWM) of SMB8J9.0CAHM3_A/I is 9.0 V - the maximum continuous reverse voltage the device can withstand without entering breakdown. This parameter establishes the operating margin between normal system voltage (e.g., 9 V supply rails or 12 V nominal systems) and clamping onset, preventing false triggering while ensuring rapid response when transients exceed this threshold. It directly impacts system noise immunity and power efficiency.
How does the SMB (DO-214AA) package of SMB8J9.0CAHM3_A/I compare to SMA in terms of thermal performance?
The SMB (DO-214AA) package of SMB8J9.0CAHM3_A/I offers lower thermal resistance than SMA: RθJA = 72 °C/W versus ~100–125 °C/W for typical SMA devices. This allows SMB8J9.0CAHM3_A/I to dissipate 800 W surges more effectively, sustaining higher junction temperatures without derating - especially critical in compact, thermally constrained automotive and industrial modules where airflow is limited.
SMB8J9.0CAHM3_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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB8J9.0CAHM3_A/I FAQ
1.How can I place an order for SMB8J9.0CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J9.0CAHM3_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 SMB8J9.0CAHM3_A/I reliable?
The price and inventory of SMB8J9.0CAHM3_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 SMB8J9.0CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMB8J9.0CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J9.0CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J9.0CAHM3_A/I?
SMB8J9.0CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J9.0CAHM3_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 SMB8J9.0CAHM3_A/I?
For technical support, including SMB8J9.0CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J9.0CAHM3_A/I requirements.
6.How does Aetrix verify that SMB8J9.0CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMB8J9.0CAHM3_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 SMB8J9.0CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMB8J9.0CAHM3_A/I?
All SMB8J9.0CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J9.0CAHM3_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 SMB8J9.0CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMB8J9.0CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J9.0CAHM3_A/I Tags
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Diodes Incorporated
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