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Vishay General Semiconductor - Diodes Division SMB8J9.0CAHM3_A/H
- Part No.:
- SMB8J9.0CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J9.0CAHM3_A/H.pdf
- Description:
- TVS DIODE 9VWM 15.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,231
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Product details
Overview
SMB8J9.0CAHM3_A/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 (10/1000 µs waveform), making it suitable for automotive sensor interface and industrial I/O line protection.
For engineers reviewing the SMB8J9.0CAHM3_A/H datasheet, SMB8J9.0CAHM3_A/H pinout, SMB8J9.0CAHM3_A/H application, or SMB8J9.0CAHM3_A/H equivalent, key selection considerations include its AEC-Q101 qualification, bidirectional polarity, low clamping ratio (VC/VWM = 1.71), halogen-free RoHS compliance, and MSL Level 1 rating for reflow compatibility.
Technical Context
This device operates as a voltage-clamping protector with symmetrical breakdown behavior in both directions, enabling robust suppression of positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable leakage performance (<1.0 µA at VWM) and fast response time (<1 ns), critical for safeguarding sensitive analog front-ends and digital interfaces.
The SMB8J9.0CAHM3_A/H delivers 800 W peak pulse power under standardized 10/1000 µs surge conditions while maintaining thermal resistance of 72 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), supporting reliable operation up to +150 °C junction temperature in compact PCB layouts with minimum 5.0 mm × 5.0 mm copper pads per terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 9.0 V - Maximum continuous reverse operating voltage before clamping begins; sets safe margin below system supply or signal swing. |
| VBR (min/max) | 10.0 V / 11.1 V - Breakdown occurs within this range at 1.0 mA test current; defines threshold consistency across production lots. |
| VC @ IPPM | 15.4 V - Clamped voltage during 20 A 10/1000 µs surge; determines maximum stress imposed on downstream circuitry. |
| IPPM | 20 A - Peak surge current capability under standard waveform; directly supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) compliance. |
| PPPM | 800 W - Peak pulse power rating; enables protection against high-energy transients like load dump or inductive switching spikes. |
| TJ max | +150 °C - Maximum junction temperature; allows deployment in under-hood automotive or high-temperature industrial enclosures. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, matte tin-plated leads, MSL Level 1 (260 °C peak reflow), 0.220" × 0.130" footprint (5.59 mm × 3.30 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Band End) | Transient return path (bidirectional) | No functional polarity marking; symmetric terminals enable orientation-agnostic placement on PCB. |
| Anode (Opposite Band) | Transient return path (bidirectional) | Identical electrical role to cathode; device functions identically regardless of mounting direction. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints. |
| AEC-Q101 qualification | Validates suitability for automotive applications including engine control modules, ADAS sensors, and body electronics. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets global environmental regulations and supports lead-free assembly processes without compromising surge robustness. |
| Low clamping ratio (VC/VWM = 1.71) | Minimizes overvoltage exposure to protected ICs-critical for 3.3 V or 5 V logic interfacing with 9 V rails. |
| MSL Level 1 rating | Permits unlimited floor life and standard reflow profiles up to 260 °C, simplifying SMT manufacturing. |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
|
Use Scenario: Protecting LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and jump-start transients in vehicle ECUs. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed between signal line and ground, acting as last-line defense before signal conditioning amplifier or microcontroller input. Use Value: Limits induced surges to ≤15.4 V, preventing latch-up or gate oxide damage in 5 V tolerant automotive MCUs and analog front-ends. |
Use Scenario: Shielding PLC digital input channels from field-wiring induced surges caused by relay coil de-energization or lightning-induced coupling. IC Role / Device Role / Timing Role: Bidirectional shunt protector mounted at connector entry point, clamping both positive and negative transients before optocoupler or level-shifter stage. Use Value: Withstands repeated 20 A surges without degradation, ensuring long-term reliability in unattended factory automation systems. |
| USB 2.0 Data Line Protection | DC Power Rail Clamp |
|
Use Scenario: Safeguarding USB 2.0 D+/D− lines in automotive infotainment head units against ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS (typ. <50 pF) placed inline with data pair, providing sub-nanosecond response without signal integrity impact. Use Value: Maintains signal fidelity up to 480 Mbps while suppressing ±15 kV contact ESD per IEC 61000-4-2, enabled by tight VBR tolerance (±5.5%). |
Use Scenario: Clamping 12 V DC power inputs in telematics control units exposed to battery reversal and alternator load dump. IC Role / Device Role / Timing Role: Primary surge clamp parallel to bulk capacitor, diverting >800 W energy away from downstream DC-DC converters and LDOs. Use Value: Survives 10/1000 µs surges up to 20 A without parametric shift, preserving power rail stability during harsh automotive electrical events. |
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_A/H | Same electrical specs, but RoHS-compliant commercial grade (not halogen-free); no AEC-Q101 validation. | Limited to non-automotive industrial or consumer use where halogen content and automotive qualification are not required. | Select when cost sensitivity outweighs halogen-free mandate or automotive qualification. |
| SMAJ9.0CAHM3_A/H | Lower 400 W PPPM, 10.5 V VBR min, SMA package (smaller footprint, higher RθJA = 85 °C/W). | Suitable only for lower-energy threats (e.g., IEC 61000-4-2 ESD), not full IEC 61000-4-5 surge levels. | Choose for space-constrained designs accepting reduced surge margin and non-automotive qualification. |
Compared with SMB8J9.0CAHE3_A/H and SMAJ9.0CAHM3_A/H, the SMB8J9.0CAHM3_A/H uniquely combines AEC-Q101 qualification, halogen-free construction, and 800 W surge capacity in the robust SMB package-making it the only option qualified for under-hood automotive power and signal line protection requiring full load-dump immunity.
Availability
SMB8J9.0CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, USB 2.0 port protection, and 12 V DC power rail clamping requiring stable component supply across extended production cycles.
Supply support for SMB8J9.0CAHM3_A/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, efficiency, and application-specific optimization.
The SMB8Jx.xCAHM3 series belongs to Vishay's TRANSZORB® automotive-grade TVS family, engineered specifically for high-reliability transient suppression in harsh environments including engine compartments, ADAS domains, and industrial control cabinets.
FAQ
What is the clamping voltage of SMB8J9.0CAHM3_A/H at its rated peak pulse current?
The SMB8J9.0CAHM3_A/H 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 and guaranteed per Vishay Document Number 88422, ensuring predictable overvoltage limiting for protected circuits. The SMB8J9.0CAHM3_A/H maintains this clamping performance across its full operating temperature range from –55 °C to +150 °C.
Is SMB8J9.0CAHM3_A/H suitable for automotive applications?
Yes, SMB8J9.0CAHM3_A/H is AEC-Q101 qualified and explicitly designated for automotive use via its HM3 suffix and HE3/HM3 ordering code structure. It meets requirements for temperature cycling, high-temperature reverse bias, and mechanical shock testing defined in AEC-Q101. The SMB8J9.0CAHM3_A/H is deployed in engine control units, body control modules, and ADAS sensor interfaces where sustained reliability under thermal and electrical stress is mandatory.
What does the "HM3" suffix indicate in SMB8J9.0CAHM3_A/H?
The "HM3" suffix in SMB8J9.0CAHM3_A/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Unlike "HE3", which is RoHS-compliant and AEC-Q101 qualified but not halogen-free, the HM3 variant satisfies strict environmental mandates for automotive and industrial markets requiring zero brominated flame retardants. The SMB8J9.0CAHM3_A/H also meets JESD201 Class 2 whisker resistance and J-STD-020 MSL Level 1 reflow specifications.
How does SMB8J9.0CAHM3_A/H differ from unidirectional variants like SMB10J9.0A?
The SMB8J9.0CAHM3_A/H is bidirectional with symmetrical clamping in both polarities, whereas SMB10J9.0A is unidirectional and conducts only in reverse bias. The SMB8J9.0CAHM3_A/H offers 800 W peak pulse power and 20 A IPPM, while SMB10J9.0A provides 1000 W and 64.9 A-reflecting different surge energy handling priorities. Additionally, SMB8J9.0CAHM3_A/H carries AEC-Q101 qualification; SMB10J9.0A-E3/M3 variants do not unless explicitly ordered with HE3/HM3 suffixes.
What is the thermal resistance of SMB8J9.0CAHM3_A/H, and how does it affect layout design?
The SMB8J9.0CAHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W and junction-to-lead (RθJL) of 20 °C/W, measured on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures under repeated surges, PCB layout must allocate adequate copper area-reducing RθJA improves power handling margin. The SMB8J9.0CAHM3_A/H's low RθJL enables efficient heat transfer to solder joints and internal traces, supporting high-reliability operation in thermally constrained automotive modules.
SMB8J9.0CAHM3_A/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:
- 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/H FAQ
1.How can I place an order for SMB8J9.0CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J9.0CAHM3_A/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_A/H reliable?
The price and inventory of SMB8J9.0CAHM3_A/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_A/H is usually 5 days.
3.What payment methods are accepted for SMB8J9.0CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J9.0CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J9.0CAHM3_A/H?
SMB8J9.0CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J9.0CAHM3_A/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_A/H?
For technical support, including SMB8J9.0CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J9.0CAHM3_A/H requirements.
6.How does Aetrix verify that SMB8J9.0CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMB8J9.0CAHM3_A/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_A/H meets industry standards.
7.What is the process for return or replacement of SMB8J9.0CAHM3_A/H?
All SMB8J9.0CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J9.0CAHM3_A/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_A/H part is unused and in its original packaging.
Return procedure for SMB8J9.0CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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