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Vishay General Semiconductor - Diodes Division SMB8J8.0CAHE3/5B
- Part No.:
- SMB8J8.0CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J8.0CAHE3/5B.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,444
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Product details
Overview
SMB8J8.0CAHE3/5B 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 8.0 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 SMB8J8.0CAHE3/5B datasheet, SMB8J8.0CAHE3/5B pinout, SMB8J8.0CAHE3/5B application, or SMB8J8.0CAHE3/5B equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VWM = 1.7), MSL Level 1 reflow compatibility, and 150 °C max junction temperature for under-hood automotive use.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within <1 ps to transients exceeding its breakdown threshold (VBR min = 8.89 V, max = 9.83 V at 1 mA). Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and robust surge handling across -55 °C to +150 °C operating range.
Designed per ANSI/IEEE C62.35, it delivers symmetrical clamping in both polarities, with thermal resistance RθJA = 72 °C/W and RθJL = 20 °C/W - enabling effective heat dissipation on standard 5.0 mm × 5.0 mm copper pads per terminal without heatsinking.
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 1 mA - defines reliable turn-on threshold with tight 10.6% tolerance |
| VC @ IPPM | 13.6 V at 100 A - limits protected circuit voltage during 800 W transient events |
| PPPM | 800 W (10/1000 µs) - sustains high-energy surges common in automotive load-dump and ISO 7637-2 tests |
| ID @ VWM | <1.0 µA - ensures negligible standby power loss and signal integrity in high-impedance lines |
| TJ max | +150 °C - supports under-hood placement and extended thermal margin in industrial environments |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile (2.20 mm height), UL 94 V-0 molded compound, matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. No polarity marking - bidirectional device.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; clamps voltage above ±13.6 V regardless of polarity |
| Case (body) | Thermal and mechanical interface | Non-electrical; provides mechanical anchoring and primary heat path to PCB copper pads |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without preconditioning or baking |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage under humidity and thermal stress |
| Bidirectional symmetry | Eliminates orientation concerns during automated placement and simplifies PCB layout |
| Low clamping ratio (VC/VWM = 1.7) | Minimizes overvoltage stress on downstream ICs such as CAN transceivers and microcontrollers |
Applications
| Automotive Sensor Protection | Industrial I/O Port Protection |
|---|---|
Use Scenario: Protecting LIN bus and analog sensor outputs (e.g., pressure, temperature) from load-dump and ESD in vehicle cabins. IC Role / Device Role / Timing Role: Shunt-type transient clamp placed directly at connector entry point before signal conditioning circuitry. Use Value: Clamps 800 W surges to ≤13.6 V while maintaining <1.0 µA leakage - preserving signal fidelity and MCU input thresholds. | Use Scenario: Safeguarding PLC digital input modules against induced surges from relay coil switching and motor noise. IC Role / Device Role / Timing Role: Primary overvoltage suppression element on 24 V DC input lines, upstream of optocoupler isolation. Use Value: Withstands repeated 100 A pulses (10/1000 µs) without degradation, extending field service life beyond 10 years. |
| Telecom Line Interface | Consumer Appliance Control Board |
Use Scenario: Shielding RS-485 transceivers in base station backhaul equipment from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: First-line defense in series with common-mode choke, absorbing differential-mode transients before IC-level protection. Use Value: Symmetrical clamping ensures equal protection for both A/B lines, preventing data corruption during 800 W surge events. | Use Scenario: Securing microcontroller GPIOs and display driver lines in washing machine control boards exposed to motor commutation noise. IC Role / Device Role / Timing Role: Localized TVS adjacent to connectors and noisy actuators, minimizing trace inductance in clamping path. Use Value: Low-profile SMB package fits dense layouts; AEC-Q101 qualification ensures reliability despite non-automotive use case. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J8.0CA-E3/5B | Same electrical specs; RoHS-compliant commercial grade (non-AEC-Q101) | Lacks automotive qualification; suitable for industrial/commercial only | Select when AEC-Q101 is not required and cost sensitivity is higher |
| SMC8J8.0CAHE3/5B | Same VWM/VC/IPPM but in larger SMC (DO-214AB) package; RθJA = 40 °C/W vs. 72 °C/W | Better thermal performance for sustained surge duty cycles; requires larger PCB area | Choose for higher ambient temperatures or repetitive surge conditions where SMB thermal margin is insufficient |
Compared with SMB8J8.0CA-E3/5B, the SMB8J8.0CAHE3/5B adds AEC-Q101 validation for automotive deployment; versus SMC8J8.0CAHE3/5B, it trades thermal derating headroom for space-constrained layouts - making SMB8J8.0CAHE3/5B optimal for compact, qualified automotive modules.
Availability
SMB8J8.0CAHE3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, and telecom line interface circuits requiring stable component supply with full AEC-Q101 traceability and RoHS compliance.
Supply support for SMB8J8.0CAHE3/5B 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.xCAHE3 series belongs to Vishay's TRANSZORB® TVS portfolio, engineered specifically for high-power-density, AEC-Q101-compliant transient suppression in harsh automotive and industrial environments.
FAQ
What is the clamping voltage of SMB8J8.0CAHE3/5B at its rated peak pulse current?
The SMB8J8.0CAHE3/5B has a maximum clamping voltage (VC) of 13.6 V when subjected to its rated 100 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's Document Number 88422, ensuring predictable overvoltage limiting for downstream ICs in the SMB8J8.0CAHE3/5B protection path.
Is SMB8J8.0CAHE3/5B suitable for automotive applications?
Yes, SMB8J8.0CAHE3/5B is AEC-Q101 qualified and explicitly designated for automotive use with the "HE3" suffix. It meets requirements for temperature cycling, high-temperature reverse bias, and ESD robustness - making it appropriate for engine control, body electronics, and ADAS sensor interfaces where SMB8J8.0CAHE3/5B is specified in the BOM.
What is the standoff voltage rating for SMB8J8.0CAHE3/5B?
The standoff voltage (VWM) for SMB8J8.0CAHE3/5B is 8.0 V - the maximum DC or continuous reverse working voltage the device can withstand without entering avalanche conduction. This value is verified per Vishay's datasheet 88422 and defines the upper limit of normal operation before SMB8J8.0CAHE3/5B begins clamping transients.
Does SMB8J8.0CAHE3/5B have polarity markings on the package?
No, SMB8J8.0CAHE3/5B does not have polarity markings because it is a bidirectional TVS diode. The SMB (DO-214AA) package is symmetric, and both terminals perform identically - eliminating orientation constraints during placement and simplifying assembly. This behavior is inherent to the SMB8J8.0CAHE3/5B design and documented in Vishay's mechanical drawings.
What is the peak pulse power rating of SMB8J8.0CAHE3/5B?
The SMB8J8.0CAHE3/5B is rated for 800 W peak pulse power (PPPM) using the standardized 10/1000 µs double-exponential waveform. This rating applies to bidirectional operation and is validated under JEDEC test conditions with 0.2" × 0.2" copper pads - a key specification confirming SMB8J8.0CAHE3/5B's suitability for ISO 7637-2 and IEC 61000-4-5 surge immunity requirements.
SMB8J8.0CAHE3/5B 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):
- 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)
SMB8J8.0CAHE3/5B FAQ
1.How can I place an order for SMB8J8.0CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J8.0CAHE3/5B 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 SMB8J8.0CAHE3/5B reliable?
The price and inventory of SMB8J8.0CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J8.0CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMB8J8.0CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J8.0CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J8.0CAHE3/5B?
SMB8J8.0CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J8.0CAHE3/5B 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 SMB8J8.0CAHE3/5B?
For technical support, including SMB8J8.0CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J8.0CAHE3/5B requirements.
6.How does Aetrix verify that SMB8J8.0CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMB8J8.0CAHE3/5B 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 SMB8J8.0CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMB8J8.0CAHE3/5B?
All SMB8J8.0CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J8.0CAHE3/5B, 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 SMB8J8.0CAHE3/5B part is unused and in its original packaging.
Return procedure for SMB8J8.0CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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