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Vishay General Semiconductor - Diodes Division SMB8J8.0CAHE3_A/I
- Part No.:
- SMB8J8.0CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J8.0CAHE3_A/I.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,738
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Product details
Overview
SMB8J8.0CAHE3_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 8.0 V stand-off voltage (VWM), 13.6 V clamping voltage (VC) at 100 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J8.0CAHE3_A/I datasheet, SMB8J8.0CAHE3_A/I pinout, SMB8J8.0CAHE3_A/I application, or SMB8J8.0CAHE3_A/I equivalent, key selection criteria include AEC-Q101 qualification, bidirectional clamping symmetry, low clamping ratio (VC/VWM = 1.7), and compatibility with automated SMT assembly on 5.0 mm × 5.0 mm copper pads.
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 architecture enables symmetrical clamping above ±8.0 V without polarity sensitivity, supporting both AC-coupled and floating signal paths.
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 (260 °C peak reflow) and is qualified to AEC-Q101 for automotive under-hood and body electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min / max | 8.89 V / 9.83 V at IT = 1.0 mA - ensures tight breakdown tolerance for predictable turn-on |
| VC @ IPPM | 13.6 V at IPPM = 100 A (10/1000 µs) - defines worst-case voltage seen by protected circuitry |
| PPPM | 800 W - peak transient energy absorption capability under standardized surge waveform |
| ID @ VWM | 1.0 µA - ultra-low leakage preserves signal integrity in high-impedance sensor inputs |
| TJ max | +150 °C - supports under-hood automotive environments and industrial enclosures |
| Package | SMB (DO-214AA) - surface-mount footprint compatible with IPC-7351B standard pad layout |
Pinout & Package
Two-terminal device in SMB (DO-214AA) package; no polarity marking for bidirectional configuration. Cathode band absent - terminals are symmetric and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals serve identical clamping function; no DC bias dependency - enables placement in AC or floating nodes |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| Glass-passivated junction | Ensures stable VBR over temperature and long-term reliability under repeated surge stress |
| MSL Level 1 compliance | Supports lead-free reflow up to 260 °C without popcorn or delamination risk |
| Low clamping ratio (VC/VWM) | 1.7 - minimizes overvoltage exposure to downstream ICs compared to higher-ratio TVS devices |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and JEDEC J-STD-201 Class 2 whisker resistance |
Applications
| Automotive Sensor Protection | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN FD and LIN bus transceivers from load dump and ESD events in vehicle body control modules. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector interface to shunt transients before reaching PHY layer. Use Value: Prevents latch-up or permanent damage to transceivers by limiting voltage to ≤13.6 V during 100 A surges - maintaining communication integrity per ISO 16750-2 Pulse 5a. |
Use Scenario: Safeguarding PLC digital input channels against inductive kickback from solenoid valves and relay coils. IC Role / Device Role / Timing Role: Primary surge suppression device mounted adjacent to terminal block to absorb 800 W transients before signal conditioning circuitry. Use Value: Enables >100,000 switching cycles without degradation due to low incremental resistance and stable VBR across temperature. |
| USB 2.0 Data Line Protection | Automotive Camera Power Rail Clamping |
Use Scenario: Shielding USB D+/D− lines in infotainment head units from ESD (IEC 61000-4-2 ±15 kV contact discharge). IC Role / Device Role / Timing Role: Low-capacitance TVS placed inline with data traces to clamp fast transients while preserving signal rise/fall times. Use Value: Achieves <0.5 pF typical junction capacitance (per Fig. 4) - avoids signal integrity loss at 480 Mbps full-speed USB operation. |
Use Scenario: Clamping 12 V camera module power rail against jump-start transients and alternator load dump in rear-view systems. IC Role / Device Role / Timing Role: Secondary overvoltage protection stage after primary DC/DC converter, rated for 800 W pulse handling. Use Value: Withstands ≥1000 pulses at 80% of rated PPPM per AEC-Q101 stress testing - ensuring field reliability over 15-year vehicle lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0CAHE3_A/I | Same SMB package, but 1000 W PPPM (unidirectional only); bidirectional variant not offered in SMBJ series | Limited to unidirectional use cases; unsuitable for AC-coupled or floating signal lines | Select only when unidirectional clamping suffices and higher PPPM is required |
| SMCJ8.0CAHE3_A/I | Same electrical specs but in larger SMC (DO-214AB) package; RθJA = 40 °C/W vs. 72 °C/W | Better thermal dissipation allows sustained surge duty cycles; requires 2.5× PCB area | Prefer for high-repetition-rate transients where SMB8J8.0CAHE3_A/I thermal derating limits performance |
Compared with SMBJ8.0CAHE3_A/I and SMCJ8.0CAHE3_A/I, SMB8J8.0CAHE3_A/I uniquely balances AEC-Q101 qualification, bidirectional symmetry, and compact SMB footprint - making it optimal for space-constrained automotive sensor nodes where polarity-agnostic protection is mandatory.
Availability
SMB8J8.0CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, USB 2.0 port protection, and camera power rail clamping requiring stable component supply and AEC-Q101 compliance.
Supply support for SMB8J8.0CAHE3_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, rectifiers, MOSFETs, and protection devices with emphasis on reliability and automotive-grade validation.
The SMB8J series targets high-density transient suppression in automotive and industrial systems, engineered specifically for AEC-Q101 compliance, low-profile SMT assembly, and robust clamping performance under repetitive surge stress.
FAQ
What is the clamping voltage of SMB8J8.0CAHE3_A/I at its rated peak pulse current?
The SMB8J8.0CAHE3_A/I has a maximum clamping voltage (VC) of 13.6 V when subjected to a 100 A peak pulse current with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SMB8J8.0CAHE3_A/I suitable for automotive applications?
Yes, SMB8J8.0CAHE3_A/I is AEC-Q101 qualified and carries the HE3 suffix denoting RoHS-compliant, automotive-grade construction. It is validated for under-hood and body electronics, including sensor interfaces and infotainment subsystems, with full traceability and extended temperature operation from –55 °C to +150 °C.
How does the bidirectional design of SMB8J8.0CAHE3_A/I affect PCB layout?
The SMB8J8.0CAHE3_A/I has no polarity marking and symmetrical terminals, eliminating orientation constraints during placement. This simplifies automated assembly and enables use in AC-coupled lines, differential pairs, or floating grounds - unlike unidirectional TVS diodes that require strict cathode/anode alignment relative to system ground.
What is the thermal resistance of SMB8J8.0CAHE3_A/I, and how does it impact power derating?
SMB8J8.0CAHE3_A/I 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. At ambient temperatures above 25 °C, peak pulse power must be linearly derated per Figure 2 in the datasheet - e.g., at 85 °C TA, PPPM drops to ~640 W for safe operation.
Does SMB8J8.0CAHE3_A/I meet lead-free reflow requirements?
Yes, SMB8J8.0CAHE3_A/I complies with J-STD-020 MSL Level 1 and supports lead-free reflow profiles with a maximum peak temperature of 260 °C. Its matte tin-plated leads are solderable per J-STD-002 and JESD 22-B102, and it passes JESD 201 Class 2 whisker testing - confirming suitability for modern high-volume SMT manufacturing.
SMB8J8.0CAHE3_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):
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB8J8.0CAHE3_A/I FAQ
1.How can I place an order for SMB8J8.0CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J8.0CAHE3_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 SMB8J8.0CAHE3_A/I reliable?
The price and inventory of SMB8J8.0CAHE3_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 SMB8J8.0CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMB8J8.0CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J8.0CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J8.0CAHE3_A/I?
SMB8J8.0CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J8.0CAHE3_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 SMB8J8.0CAHE3_A/I?
For technical support, including SMB8J8.0CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J8.0CAHE3_A/I requirements.
6.How does Aetrix verify that SMB8J8.0CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMB8J8.0CAHE3_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 SMB8J8.0CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMB8J8.0CAHE3_A/I?
All SMB8J8.0CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J8.0CAHE3_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 SMB8J8.0CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMB8J8.0CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J8.0CAHE3_A/I Tags
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