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Vishay General Semiconductor - Diodes Division SMB8J9.0CAHM3/H
- Part No.:
- SMB8J9.0CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J9.0CAHM3/H.pdf
- Description:
- TVS DIODE 9VWM 15.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,643
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Product details
Overview
SMB8J9.0CAHM3/H 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 interfaces and industrial I/O protection.
For engineers reviewing the SMB8J9.0CAHM3/H datasheet, SMB8J9.0CAHM3/H pinout, SMB8J9.0CAHM3/H application, or SMB8J9.0CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance (HM3 suffix), and compatibility with 0.2" × 0.2" copper pad layout per JEDEC standard.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its bidirectional symmetry enables protection of AC-coupled or differential lines without polarity concerns.
Rated for -55 °C to +150 °C operating junction temperature and qualified to AEC-Q101, SMB8J9.0CAHM3/H supports automotive-grade reliability under repetitive surge stress. Thermal resistance is characterized at RθJA = 72 °C/W (typ.) and RθJL = 20 °C/W (typ.), enabling accurate derating above 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 9.0 V - blocks normal operation voltage up to 9.0 V while remaining high-impedance |
| VBR (Breakdown Voltage) | 10.0–11.1 V at 1.0 mA - onset of avalanche conduction under controlled test conditions |
| VC (Clamping Voltage) | 15.4 V at IPPM = 20 A - maximum voltage seen by protected circuit during 10/1000 μs surge |
| PPPM (Peak Pulse Power) | 800 W - energy-handling capacity for standardized 10/1000 μs transient waveform |
| ID (Reverse Leakage) | ≤1.0 μA at VWM - ensures minimal standby power loss and signal integrity in high-impedance circuits |
| TJ max | +150 °C - enables use in under-hood automotive environments and thermally constrained PCBs |
| Package | SMB (DO-214AA) - surface-mount footprint compatible with automated placement and J-STD-020 MSL Level 1 reflow |
Pinout & Package
Two-terminal SMB (DO-214AA) package with no polarity marking for bidirectional operation; terminals are matte tin-plated and solderable per J-STD-002 and JESD 22-B102. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for rated power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Identical bidirectional avalanche behavior - either terminal serves as input or return path during surge |
| Case (body) | Thermal and mechanical interface | Non-electrical; provides thermal path to PCB copper and mechanical anchoring per DO-214AA outline |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
| Halogen-free & RoHS-compliant (HM3) | Meets global environmental regulations without compromising surge robustness or thermal performance |
| Low incremental surge resistance | Enables tighter clamping (VC − VBR ≈ 5.4 V) and reduced let-through energy to downstream ICs |
| Glass passivated junction | Ensures stable breakdown characteristics and long-term reliability under humidity and thermal cycling |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without pre-baking or special handling |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN, LIN, or analog sensor outputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role: Bidirectional voltage clamp placed across signal line and ground before signal conditioning amplifier. Use Value: Limits transient voltage to ≤15.4 V during 20 A surges, preventing damage to 3.3 V/5 V ADC inputs and maintaining signal fidelity. |
Use Scenario: Safeguarding PLC digital input modules against inductive kickback from solenoid/relay switching. IC Role / Device Role: Primary surge suppression element on 24 V DC input channel, upstream of optocoupler or level shifter. Use Value: Absorbs 800 W pulses without degradation, enabling reliable operation in factory-floor electromagnetic environments. |
| USB Port ESD Protection | Telecom Line Interface |
|
Use Scenario: Secondary-level ESD protection on USB 2.0 data lines (D+/D−) in automotive infotainment head units. IC Role / Device Role: Low-capacitance bidirectional TVS placed differential across data pair to ground. Use Value: Clamps ±15 kV contact ESD (IEC 61000-4-2) while adding <1 pF parasitic capacitance - preserving signal integrity at 480 Mbps. |
Use Scenario: Overvoltage protection on telephone line interface circuits in VoIP gateways and PBX systems. IC Role / Device Role: Line-to-ground and line-to-line protection element on tip/ring terminals. Use Value: Withstands repeated lightning-induced surges (ITU-T K.20/21) up to 800 W, extending system MTBF in outdoor deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J9.0CAHE3/H | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs HM3) | Lacks halogen-free certification required for certain automotive Tier 1 supply chains | Select SMB8J9.0CAHE3/H only if halogen-free material is not mandated by end-customer specification. |
| SMBJ9.0CAHM3/H | Unidirectional variant (SMBJ series); same VWM/VC but asymmetric conduction - cathode-marked | Requires polarity-aware layout; unsuitable for AC or differential signal protection | Choose SMBJ9.0CAHM3/H only when protecting unidirectional DC rails where reverse conduction must be blocked. |
Compared with SMB8J9.0CAHE3/H and SMBJ9.0CAHM3/H, SMB8J9.0CAHM3/H uniquely combines bidirectional clamping, AEC-Q101 qualification, and halogen-free construction - making it the preferred choice for automotive-grade differential signal protection where material compliance and polarity insensitivity are both required.
Availability
SMB8J9.0CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, USB port ESD protection, and telecom line interface circuits requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMB8J9.0CAHM3/H 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 and application-specific optimization.
The SMB8Jx.xCA series targets high-reliability transient suppression in automotive and industrial environments, with design focus on AEC-Q101 compliance, low clamping ratio, and robust surge endurance under thermal stress.
FAQ
What is the clamping voltage of SMB8J9.0CAHM3/H at its rated peak pulse current?
The SMB8J9.0CAHM3/H has a maximum clamping voltage (VC) of 15.4 V when subjected to a 10/1000 μs waveform peak pulse current (IPPM) of 20 A. This value is measured per ANSI/IEEE C62.35 and ensures downstream circuitry remains within safe operating limits during surge events. The SMB8J9.0CAHM3/H maintains this clamping performance across its qualified temperature range of -55 °C to +150 °C.
Is SMB8J9.0CAHM3/H suitable for automotive applications?
Yes, SMB8J9.0CAHM3/H is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials (HM3 suffix), meeting stringent automotive reliability requirements. It is specified for use in engine control units, body electronics, and ADAS sensor interfaces where immunity to load dump, ISO 7637-2 pulses, and ESD is critical. The SMB8J9.0CAHM3/H undergoes stress testing per AEC-Q101 including HTGB, HTRB, and temperature cycling.
How does SMB8J9.0CAHM3/H differ from unidirectional SMBJ9.0CAHM3/H?
SMB8J9.0CAHM3/H is bidirectional with symmetrical avalanche behavior on both terminals, while SMBJ9.0CAHM3/H is unidirectional and requires correct cathode orientation. The SMB8J9.0CAHM3/H supports AC-coupled or differential signal protection without polarity constraints, whereas SMBJ9.0CAHM3/H is limited to DC rail protection where reverse conduction must be blocked. Both share identical VWM (9.0 V) and VC (15.4 V), but SMBJ9.0CAHM3/H offers higher PPPM (1000 W).
What PCB layout guidance applies to SMB8J9.0CAHM3/H for optimal thermal performance?
For rated 800 W pulse power handling, SMB8J9.0CAHM3/H must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, per Vishay's recommended pad layout. Use internal or external copper planes connected via multiple thermal vias to enhance heat dissipation. Avoid narrow traces between the SMB8J9.0CAHM3/H and ground plane, as excessive trace resistance increases clamping voltage during surge events.
Does SMB8J9.0CAHM3/H meet JEDEC moisture sensitivity level requirements?
Yes, SMB8J9.0CAHM3/H meets J-STD-020 Moisture Sensitivity Level (MSL) 1, with a maximum peak reflow temperature of 260 °C. This allows standard lead-free reflow processing without pre-baking, simplifying manufacturing flow for high-volume automotive and industrial assembly. The device's molding compound also complies with UL 94 V-0 flammability rating.
SMB8J9.0CAHM3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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/H FAQ
1.How can I place an order for SMB8J9.0CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J9.0CAHM3/H 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/H reliable?
The price and inventory of SMB8J9.0CAHM3/H 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/H is usually 5 days.
3.What payment methods are accepted for SMB8J9.0CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J9.0CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J9.0CAHM3/H?
SMB8J9.0CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J9.0CAHM3/H 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/H?
For technical support, including SMB8J9.0CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J9.0CAHM3/H requirements.
6.How does Aetrix verify that SMB8J9.0CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMB8J9.0CAHM3/H 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/H meets industry standards.
7.What is the process for return or replacement of SMB8J9.0CAHM3/H?
All SMB8J9.0CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J9.0CAHM3/H, 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/H part is unused and in its original packaging.
Return procedure for SMB8J9.0CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J9.0CAHM3/H Tags
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