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Vishay General Semiconductor - Diodes Division SMB8J8.0CAHM3_A/H
- Part No.:
- SMB8J8.0CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J8.0CAHM3_A/H.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,299
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Product details
Overview
SMB8J8.0CAHM3_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 8.89 V minimum / 9.83 V maximum breakdown voltage at 1 mA test current, 8.0 V stand-off voltage, 13.6 V clamping voltage at 100 A peak pulse current, and 800 W peak pulse power rating with 10/1000 µs waveform.
For engineers reviewing the SMB8J8.0CAHM3_A/H datasheet, SMB8J8.0CAHM3_A/H pinout, SMB8J8.0CAHM3_A/H application, or SMB8J8.0CAHM3_A/H equivalent, this device is selected for automotive-grade ESD/surge protection where AEC-Q101 qualification, low clamping ratio, and halogen-free RoHS compliance are required - especially in sensor interfaces, CAN/LIN bus lines, and power supply inputs.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling robust protection against voltage transients induced by inductive switching, ESD, and lightning surges without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while MSL Level 1 moisture sensitivity supports lead-free reflow up to 260 °C.
The device delivers 100 A peak pulse current (IPPM) under 10/1000 µs waveform with 13.6 V clamping voltage, achieving a clamping ratio (VC/VBR) of ~1.37–1.53. Thermal resistance is 72 °C/W junction-to-ambient (RθJA) on standard 0.2" × 0.2" copper pads, supporting reliable operation up to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VBR) | 8.89 V min / 9.83 V max at 1 mA - defines precise voltage threshold for avalanche conduction onset |
| Stand-off Voltage (VWM) | 8.0 V - maximum continuous reverse voltage before significant leakage begins |
| Clamping Voltage (VC) | 13.6 V at 100 A IPPM - limits protected circuit voltage during worst-case surge |
| Peak Pulse Power (PPPM) | 800 W (10/1000 µs) - quantifies single-event surge energy handling capability |
| Peak Pulse Current (IPPM) | 100 A (10/1000 µs) - maximum transient current safely diverted to ground |
| Reverse Leakage (ID) | ≤1.0 µA at VWM - ensures minimal power loss and signal integrity in standby |
| Junction Temperature Range | -55 °C to +150 °C - supports operation in under-hood automotive and industrial environments |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, AEC-Q101 qualified. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); cathode band absent (bidirectional symmetry).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Both terminals function identically - no polarity marking; bidirectional conduction enables universal placement |
| Case (body) | Thermal and mechanical interface | Plastic molding meets UL 94 V-0; leads matte tin-plated per J-STD-002 for reliable solderability |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, ADAS sensors, and infotainment power rails |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets global environmental regulations and JEDEC JESD201 Class 2 whisker resistance |
| Low clamping ratio (VC/VBR ≈ 1.37–1.53) | Minimizes overvoltage stress on downstream ICs such as microcontrollers and transceivers |
| MSL Level 1, 260 °C peak reflow | Enables compatibility with standard lead-free SMT assembly without pre-baking |
| Glass-passivated junction | Ensures stable VBR over lifetime and improved reliability vs. epoxy-passivated alternatives |
Applications
| Automotive Sensor Interface | CAN Bus Protection |
|---|---|
|
Use Scenario: Protecting analog outputs of pressure, temperature, or position sensors in engine bay or chassis modules. IC Role / Device Role / Timing Role: Bidirectional TVS placed between sensor signal line and ground to clamp ESD and load-dump transients. Use Value: Prevents latch-up or damage to 12-bit ADC inputs and op-amps operating at 3.3 V or 5 V, leveraging 13.6 V clamping and <1 µA leakage. |
Use Scenario: Safeguarding CANH/CANL differential pair against ISO 7637-2 pulses and ESD events in vehicle networks. IC Role / Device Role / Timing Role: Paired SMB8J8.0CAHM3_A/H devices (one per line) provide symmetrical surge suppression without affecting signal integrity. Use Value: Maintains CAN signal rise/fall times due to low junction capacitance (~300 pF typical at 0 V), while surviving 100 A transients per line. |
| Industrial Power Input Stage | Consumer USB Port Protection |
|
Use Scenario: Front-end protection for 12 V DC input rails feeding PLC I/O modules or motor drivers. IC Role / Device Role / Timing Role: TVS placed after fuse and before DC-DC converter to absorb load dump spikes up to 35 V. Use Value: Withstands 800 W surges and operates continuously from -40 °C to +125 °C ambient, meeting IEC 61000-4-5 Level 4 requirements. |
Use Scenario: ESD protection for VBUS and D+/D- lines in portable chargers and docking stations. IC Role / Device Role / Timing Role: Bidirectional clamping prevents forward/reverse overvoltage during hot-plug and contact discharge events. Use Value: 8.0 V stand-off avoids interference with 5 V USB signaling, while 13.6 V clamping protects USB PHY transceivers rated to 16 V absolute max. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J8.0CAHE3_A/H | RoHS-compliant but not halogen-free; same electrical specs and AEC-Q101 qualification | Acceptable for commercial-automotive hybrids where halogen content is unrestricted | Select when cost sensitivity outweighs halogen-free requirement and full automotive compliance is still needed |
| SMAJ8.0CA-M3/A | Lower PPPM (400 W), smaller SMA package (DO-214AC), same VBR/VC specs | Suitable for space-constrained consumer boards but insufficient for 800 W automotive load dump | Choose only for non-automotive, lower-energy applications where PCB area is critical |
Compared with SMB8J8.0CAHM3_A/H, the HE3 variant trades halogen-free status for marginally lower cost without sacrificing AEC-Q101 or surge rating, while the SMAJ8.0CA-M3/A reduces footprint and power handling - making it unsuitable for under-hood use but viable for compact consumer designs.
Availability
SMB8J8.0CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor protection, CAN bus hardening, and industrial DC input stage design requiring stable component supply, long-term lifecycle support, and AEC-Q101 traceability.
Supply support for SMB8J8.0CAHM3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade validation.
The SMB8Jx.xCA series targets high-reliability transient suppression in harsh environments, specifically engineered for AEC-Q101 compliance, low clamping, and thermal robustness in automotive and industrial power/signal lines.
FAQ
What is the clamping voltage of SMB8J8.0CAHM3_A/H at its rated peak pulse current?
The SMB8J8.0CAHM3_A/H has a maximum clamping voltage (VC) of 13.6 V when subjected to its rated 100 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream ICs see limited overvoltage during surge events - a critical parameter for protecting 5 V or 3.3 V logic interfaces. The SMB8J8.0CAHM3_A/H maintains this clamping performance across its full operating temperature range.
Is SMB8J8.0CAHM3_A/H suitable for automotive applications?
Yes, SMB8J8.0CAHM3_A/H is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials (HM3 suffix), making it approved for automotive use in engine control units, body electronics, and ADAS sensor modules. Its -55 °C to +150 °C junction temperature range, MSL Level 1 rating, and validated surge performance per ISO 7637-2 support deployment in demanding under-hood and chassis locations - confirming SMB8J8.0CAHM3_A/H meets automotive reliability and regulatory requirements.
How does the bidirectional configuration of SMB8J8.0CAHM3_A/H affect PCB layout?
The SMB8J8.0CAHM3_A/H has no polarity marking and functions identically in either orientation, eliminating orientation constraints during automated placement and simplifying layout. Unlike unidirectional TVS diodes, it requires no cathode band alignment - reducing assembly errors and enabling symmetric placement on differential lines like CAN or RS-485. This symmetry also allows single-part stocking for both polarities, lowering inventory complexity while maintaining full protection coverage for AC-coupled or floating signals - a key advantage of SMB8J8.0CAHM3_A/H in bidirectional interface protection.
What is the thermal resistance of SMB8J8.0CAHM3_A/H, and how does it impact board design?
The SMB8J8.0CAHM3_A/H 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 FR-4 PCB with no internal planes; adding thermal vias or larger copper areas can reduce RθJA. For sustained surge duty or high ambient temperatures, designers must verify junction temperature stays below 150 °C using this RθJA - directly influencing pad size, copper weight, and airflow in the SMB8J8.0CAHM3_A/H layout.
Does SMB8J8.0CAHM3_A/H meet industry standards for surge immunity testing?
Yes, SMB8J8.0CAHM3_A/H is characterized for compliance with IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and IEC 61000-4-5 (surge) when applied per recommended layout. Its 800 W peak pulse power rating corresponds to Level 4 (4 kV line-to-ground, 2 kV line-to-line) per IEC 61000-4-5 using 10/1000 µs waveform. The SMB8J8.0CAHM3_A/H achieves this with verified clamping performance and AEC-Q101 qualification - confirming suitability for systems requiring certified surge immunity in automotive and industrial equipment.
SMB8J8.0CAHM3_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):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 13.6V
- Current - Peak Pulse (10/1000µs):
- 58.8A
- 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)
SMB8J8.0CAHM3_A/H FAQ
1.How can I place an order for SMB8J8.0CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J8.0CAHM3_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 SMB8J8.0CAHM3_A/H reliable?
The price and inventory of SMB8J8.0CAHM3_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 SMB8J8.0CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMB8J8.0CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J8.0CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J8.0CAHM3_A/H?
SMB8J8.0CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J8.0CAHM3_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 SMB8J8.0CAHM3_A/H?
For technical support, including SMB8J8.0CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J8.0CAHM3_A/H requirements.
6.How does Aetrix verify that SMB8J8.0CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMB8J8.0CAHM3_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 SMB8J8.0CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMB8J8.0CAHM3_A/H?
All SMB8J8.0CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J8.0CAHM3_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 SMB8J8.0CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMB8J8.0CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J8.0CAHM3_A/H Tags
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