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Vishay General Semiconductor - Diodes Division SMBJ8.0CAHE3_A/H
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- Part No.:
- SMBJ8.0CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ8.0CAHE3_A/H.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,198
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Product details
Overview
SMBJ8.0CAHE3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, designed for robust ESD and surge protection on signal/power lines. It features a 8.0 V stand-off voltage (VWM), 6.4–7.07 V breakdown voltage (VBR) at 10 mA, 13.6 V clamping voltage (VC) at 44.1 A peak pulse current, and 600 W peak pulse power (10/1000 µs waveform), deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMBJ8.0CAHE3_A/H datasheet, SMBJ8.0CAHE3_A/H pinout, SMBJ8.0CAHE3_A/H application, or SMBJ8.0CAHE3_A/H equivalent, this device is selected for bidirectional transient suppression where low clamping ratio, AEC-Q101 qualification, and MSL Level 1 moisture sensitivity are required - especially in CAN/LIN bus nodes, motor control feedback lines, and USB/RS-485 interface protection.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR, VC, and IPPM specifications in forward and reverse directions. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1.0 ns), enabling effective suppression of EFT bursts and lightning-induced surges per IEC 61000-4-2/4-4/4-5.
Thermally, it exhibits RθJA = 100 °C/W and RθJL = 20 °C/W, supporting operation up to +150 °C junction temperature. The HE3 suffix confirms RoHS compliance and AEC-Q101 qualification, making it suitable for automotive-grade designs requiring long-term reliability under thermal cycling and humidity stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous reverse operating voltage before significant conduction begins; sets upper limit for safe signal line biasing. |
| VBR (min/max) | 6.4 V / 7.07 V at 10 mA - Ensures reliable triggering during transients while avoiding false triggering near nominal rail voltages. |
| VC @ IPPM | 13.6 V at 44.1 A - Clamped voltage seen by protected IC during 600 W surge; defines maximum stress on downstream circuitry. |
| PPPM | 600 W (10/1000 µs) - Peak surge energy handling capacity; validates suitability for IEC 61000-4-5 Level 3 (1 kV/2 Ω) testing. |
| IPPM | 44.1 A - Peak surge current capability; determines minimum trace width and PCB copper area needed for safe dissipation. |
| TJ max | +150 °C - Enables use in under-hood automotive environments and high-temperature industrial enclosures without derating. |
| MSL Level | Level 1 (J-STD-020) - Allows standard SMT reflow without baking; simplifies manufacturing and reduces assembly cost. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), matte tin-plated leads, UL 94 V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (negative polarity) | Connects to line being protected; forms symmetrical conduction path with cathode during negative transients. |
| Cathode | Transient current entry point (positive polarity) | Connects to line being protected; forms symmetrical conduction path with anode during positive transients. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., RS-485, CAN differential pairs) without polarity concerns. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive applications including engine control modules, body electronics, and ADAS sensor interfaces per stress test requirements. |
| 600 W peak pulse power | Supports IEC 61000-4-5 surge immunity up to 1 kV open-circuit / 0.5 kV short-circuit (2 Ω source impedance) without failure. |
| Low clamping ratio (VC/VBR ≈ 1.92) | Minimizes overvoltage exposure to protected ICs - critical for 3.3 V or 5 V logic interfacing with 8 V rails. |
| MSL Level 1 & J-STD-002 compliant | Eliminates pre-bake requirement and supports standard lead-free reflow profiles (peak 260 °C), reducing production complexity. |
Applications
| Automotive Sensor Interface | Industrial RS-485 Bus |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control units exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS clamping transient energy before it reaches ADC input or op-amp buffer stages. Use Value: Maintains signal integrity under ±100 V/50 ms load dump events while preserving <1 µA leakage at 8 V supply. |
Use Scenario: Shielding RS-485 transceiver data lines (A/B) against ESD and surge in factory automation PLC backplanes. IC Role / Device Role / Timing Role: Fast-clamping protection element placed directly at connector entry point, shunting transients to ground. Use Value: Limits voltage excursion to ≤13.6 V during 44.1 A surges, preventing transceiver latch-up and ensuring >100,000 surge cycles lifetime. |
| USB 2.0 Data Lines | Motor Control Feedback |
Use Scenario: ESD protection on D+/D− lines of automotive infotainment USB ports subjected to ±15 kV contact discharge (IEC 61000-4-2). IC Role / Device Role / Timing Role: Low-capacitance bidirectional suppressor placed adjacent to USB connector to minimize signal distortion. Use Value: Delivers sub-nanosecond response and <0.5 pF junction capacitance (typ.) at zero bias, preserving USB 2.0 eye diagram integrity. |
Use Scenario: Safeguarding hall-effect sensor outputs in BLDC motor drives exposed to commutation-induced voltage spikes. IC Role / Device Role / Timing Role: Transient voltage clamp on low-voltage analog feedback paths (e.g., 0–5 V position signals). Use Value: Clamps 600 W surges within 1 ns while maintaining 8.0 V stand-off margin above nominal 5 V sensor supply, preventing false triggering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0CA-E3/52 | Commercial-grade (non-AEC-Q101), same VWM/VC/PPPM, identical SMB package and pinout. | Lacks automotive qualification; not recommended for under-hood or safety-critical ECUs. | Select when cost-sensitive industrial or consumer applications require same electrical performance without automotive validation. |
| SAC8.0 | Same VWM and VC, but lower PPPM (400 W), smaller SOD-123FL package, higher RθJA (150 °C/W). | Lower surge rating and thermal resistance limit use to low-energy interfaces like I²C or GPIO. | Choose only for space-constrained, non-automotive designs where 400 W surge margin suffices and board area is premium. |
Compared with SMBJ8.0CAHE3_A/H, the E3/52 variant offers identical protection performance at lower cost but lacks AEC-Q101 validation, while SAC8.0 trades surge robustness and thermal capability for footprint reduction - making SMBJ8.0CAHE3_A/H the optimal choice for automotive and high-reliability industrial deployments.
Availability
SMBJ8.0CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial communication interfaces, USB port hardening, and motor feedback line safeguarding requiring stable component supply across multi-year production cycles.
Supply support for SMBJ8.0CAHE3_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 application-specific optimization.
The SMBJ series targets high-energy transient suppression in automotive, industrial, and telecom systems, engineered for AEC-Q101 compliance, low clamping ratio, and robust surge endurance in harsh environments.
FAQ
What is the clamping voltage of SMBJ8.0CAHE3_A/H at its rated peak pulse current?
The SMBJ8.0CAHE3_A/H has a maximum clamping voltage (VC) of 13.6 V at its rated peak pulse current (IPPM) of 44.1 A, measured under the standardized 10/1000 µs double-exponential surge waveform. This value defines the highest voltage imposed on protected circuitry during a full-rated 600 W transient event, and is confirmed in the Vishay SMBJ5.0A–SMBJ188A datasheet (Document Number: 88392, Rev. 09-Jan-2024) Table on page 2.
Is SMBJ8.0CAHE3_A/H suitable for automotive applications?
Yes, SMBJ8.0CAHE3_A/H is explicitly AEC-Q101 qualified, as indicated by the "HE3" suffix in its part number. It meets the stress test requirements for automotive electronics including temperature cycling, humidity bias, and mechanical shock, and is rated for operation from –55 °C to +150 °C. This makes SMBJ8.0CAHE3_A/H appropriate for use in engine control units, body control modules, and ADAS sensor interfaces where reliability under harsh conditions is mandatory.
What does the "CA" suffix signify in SMBJ8.0CAHE3_A/H?
The "CA" suffix in SMBJ8.0CAHE3_A/H denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SMBJ8.0A), SMBJ8.0CAHE3_A/H has no polarity marking and delivers identical breakdown (6.4–7.07 V), clamping (13.6 V), and surge current (44.1 A) characteristics in either direction, making it ideal for protecting AC-coupled or floating differential lines such as CAN, RS-485, or audio signals.
What is the maximum reverse leakage current for SMBJ8.0CAHE3_A/H at its stand-off voltage?
The maximum reverse leakage current (ID) for SMBJ8.0CAHE3_A/H is 1.0 µA at its stand-off voltage (VWM) of 8.0 V, tested at TA = 25 °C. This low leakage ensures minimal power loss and signal interference in always-on or battery-powered circuits, and is specified in the Electrical Characteristics table (page 2) of the Vishay SMBJ5.0A–SMBJ188A datasheet (Doc. No. 88392).
Does SMBJ8.0CAHE3_A/H require special handling during PCB assembly?
No, SMBJ8.0CAHE3_A/H is rated MSL Level 1 per J-STD-020 and supports standard lead-free reflow profiles with a maximum peak temperature of 260 °C. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards, and whisker resistance meets JESD 201 Class 2. Therefore, SMBJ8.0CAHE3_A/H can be assembled using conventional SMT processes without pre-baking or special flux requirements - simplifying manufacturing and reducing yield risk.
SMBJ8.0CAHE3_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):
- 44.1A
- Power - Peak Pulse:
- 600W
- 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 (SMBJ)
SMBJ8.0CAHE3_A/H FAQ
1.How can I place an order for SMBJ8.0CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ8.0CAHE3_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 SMBJ8.0CAHE3_A/H reliable?
The price and inventory of SMBJ8.0CAHE3_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 SMBJ8.0CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ8.0CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ8.0CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ8.0CAHE3_A/H?
SMBJ8.0CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ8.0CAHE3_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 SMBJ8.0CAHE3_A/H?
For technical support, including SMBJ8.0CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ8.0CAHE3_A/H requirements.
6.How does Aetrix verify that SMBJ8.0CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ8.0CAHE3_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 SMBJ8.0CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ8.0CAHE3_A/H?
All SMBJ8.0CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ8.0CAHE3_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 SMBJ8.0CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMBJ8.0CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ8.0CAHE3_A/H Tags
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