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Vishay General Semiconductor - Diodes Division SMB8J8.0CA-E3/5B
- Part No.:
- SMB8J8.0CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J8.0CA-E3/5B.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,846
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Product details
Overview
SMB8J8.0CA-E3/5B 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 maximum 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 SMB8J8.0CA-E3/5B datasheet, SMB8J8.0CA-E3/5B pinout, SMB8J8.0CA-E3/5B application, or SMB8J8.0CA-E3/5B equivalent, key selection criteria include bidirectional clamping behavior, AEC-Q101 qualification, 1.0 µA max reverse leakage at VWM, thermal resistance (RθJA = 72 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within <1 ps to transients induced by inductive switching or ESD events. Its glass-passivated junction ensures stable breakdown characteristics, while bidirectional symmetry enables protection of AC-coupled or differential signal paths without polarity constraints.
The device complies with ANSI/IEEE C62.35 surge standards and meets MSL level 1 per J-STD-020 (260 °C peak reflow). Its 150 °C maximum junction temperature and AEC-Q101 qualification confirm suitability for under-hood automotive environments and industrial control systems requiring long-term reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - maximum continuous reverse operating voltage before clamping begins; sets safe margin below circuit operating voltage |
| VBR min / max | 8.89 V / 9.83 V at 1.0 mA - verified breakdown threshold range ensuring consistent turn-on across production lots |
| VC @ IPPM | 13.6 V at 100 A - clamping voltage during full-rated surge; defines worst-case overvoltage seen by protected IC |
| PPPM | 800 W (10/1000 µs) - peak transient energy absorption capacity; determines survivability against IEC 61000-4-5 Level 4 surges |
| ID @ VWM | ≤1.0 µA - ultra-low leakage preserves signal integrity and battery life in always-on sensor nodes |
| RθJA | 72 °C/W - thermal resistance from junction to ambient; informs derating requirements on standard FR4 PCBs |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
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, J-STD-002 solderable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Bidirectional terminals - either end serves as anode or cathode depending on transient polarity; no color band or marking required |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term parameter stability under thermal cycling and humidity stress |
| Low incremental surge resistance | Minimizes VC rise under high di/dt transients - critical for protecting fast-switching MOSFET gates and CAN transceivers |
| MSL Level 1 rating | Enables single-reflow assembly without moisture sensitivity concerns - eliminates bake-out requirement for high-volume SMT lines |
| UL 94 V-0 molding compound | Provides flame-retardant encapsulation meeting safety standards for industrial and automotive enclosures |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting LIN bus and analog sensor inputs (e.g., pressure, temperature) in engine control modules from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt clamping element placed directly at connector entry point to divert >100 A transients away from ASIC front-end. Use Value: 13.6 V clamping ensures downstream op-amps and ADCs remain within absolute maximum ratings during 12 V system surges. | Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers exposed to relay coil flyback and field wiring faults. IC Role / Device Role / Timing Role: Primary overvoltage clamp on dry-contact interface, coordinated with series impedance to limit let-through energy. Use Value: 800 W PPPM rating sustains repeated 1 kV/500 A surges per IEC 61000-4-4 without degradation. |
| USB Type-C Port Protection | RS-485 Transceiver Interface |
Use Scenario: Bidirectional ESD and surge suppression on USB 2.0 D+/D− lines in automotive infotainment head units. IC Role / Device Role / Timing Role: Low-capacitance (≈100 pF typical) shunt protector placed adjacent to connector to minimize stub length. Use Value: Symmetrical clamping prevents signal inversion during ±8 kV contact ESD (IEC 61000-4-2), preserving data integrity. | Use Scenario: Protecting half-duplex RS-485 transceivers in factory automation networks from ground loop surges and lightning-induced transients. IC Role / Device Role / Timing Role: Common-mode surge limiter on A/B differential pair, referenced to local ground plane. Use Value: 8.0 V VWM provides 20 % margin above 6.5 V RS-485 common-mode range while enabling fast response to >1 kV transients. |
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-E3/5B | 1000 W PPPM (unidirectional variant); same VWM/VBR/VC but higher surge rating | Unidirectional only - requires polarity-aware layout; not suitable for AC or differential lines | Select when protecting DC-biased rails where polarity is fixed and higher surge margin is needed |
| SMCJ8.0CA-E3/57T | Larger SMC (DO-214AB) package; 1500 W PPPM; RθJA = 35 °C/W | Higher thermal mass supports sustained surge duty cycles; requires larger PCB footprint | Choose for industrial motor drives with repetitive surge exposure where SMB thermal limits are exceeded |
Compared with SMBJ8.0CA-E3/5B and SMCJ8.0CA-E3/57T, SMB8J8.0CA-E3/5B delivers optimal balance of bidirectional capability, AEC-Q101 compliance, and compact SMB footprint - making it the preferred choice for space-constrained automotive and portable industrial interfaces where polarity-agnostic protection is mandatory.
Availability
SMB8J8.0CA-E3/5B is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and USB Type-C interface designs requiring stable component supply, RoHS-compliant materials, and AEC-Q101 traceability.
Supply support for SMB8J8.0CA-E3/5B 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 SMB8J series belongs to Vishay's TRANSZORB® TVS portfolio, engineered specifically for high-power-density, bidirectional surge suppression in automotive and industrial environments where AEC-Q101 validation and low-profile SMT integration are mandatory.
FAQ
What is the clamping voltage of SMB8J8.0CA-E3/5B at its rated peak pulse current?
The SMB8J8.0CA-E3/5B exhibits 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 at the device terminals and represents the upper bound of overvoltage imposed on protected circuitry during worst-case surge events - a critical parameter for ensuring downstream ICs remain within their absolute maximum voltage ratings.
Is SMB8J8.0CA-E3/5B suitable for automotive applications?
Yes, SMB8J8.0CA-E3/5B is AEC-Q101 qualified and explicitly designated for automotive use, with validation across temperature cycling, highly accelerated life testing (HALT), and ESD robustness per JESD22-A114. Its 150 °C maximum junction temperature, MSL Level 1 reflow rating, and RoHS-compliant construction make SMB8J8.0CA-E3/5B appropriate for engine control units, body electronics, and ADAS sensor interfaces where reliability under harsh environmental conditions is required.
How does the bidirectional configuration of SMB8J8.0CA-E3/5B affect its circuit implementation?
The bidirectional configuration of SMB8J8.0CA-E3/5B eliminates polarity dependency, allowing direct placement across AC-coupled lines, differential pairs (e.g., RS-485, CAN FD), or ungrounded signal paths without orientation constraints. Unlike unidirectional TVS diodes, SMB8J8.0CA-E3/5B conducts symmetrically for both positive and negative transients - simplifying layout, reducing BOM count, and avoiding misorientation risks during automated assembly.
What is the reverse leakage current specification for SMB8J8.0CA-E3/5B at its stand-off voltage?
At its 8.0 V stand-off voltage (VWM), the SMB8J8.0CA-E3/5B specifies a maximum reverse leakage current (ID) of 1.0 µA at 25 °C. This ultra-low leakage preserves signal fidelity in high-impedance sensor interfaces and minimizes quiescent power loss in battery-powered automotive modules - a key differentiator versus higher-leakage alternatives that may compromise accuracy or runtime.
Can SMB8J8.0CA-E3/5B be used in place of SMBJ8.0CA-E3/5B?
No - SMB8J8.0CA-E3/5B and SMBJ8.0CA-E3/5B are not interchangeable without design review. SMB8J8.0CA-E3/5B is bidirectional with 800 W PPPM, while SMBJ8.0CA-E3/5B is unidirectional with 1000 W PPPM. Substituting SMB8J8.0CA-E3/5B for SMBJ8.0CA-E3/5B introduces polarity ambiguity and reduces surge rating; conversely, using SMBJ8.0CA-E3/5B in a bidirectional path causes forward conduction failure. Always verify circuit topology and surge profile before substitution.
SMB8J8.0CA-E3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB8J8.0CA-E3/5B FAQ
1.How can I place an order for SMB8J8.0CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J8.0CA-E3/5B 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 SMB8J8.0CA-E3/5B reliable?
The price and inventory of SMB8J8.0CA-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J8.0CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMB8J8.0CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J8.0CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J8.0CA-E3/5B?
SMB8J8.0CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J8.0CA-E3/5B 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 SMB8J8.0CA-E3/5B?
For technical support, including SMB8J8.0CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J8.0CA-E3/5B requirements.
6.How does Aetrix verify that SMB8J8.0CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMB8J8.0CA-E3/5B 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 SMB8J8.0CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SMB8J8.0CA-E3/5B?
All SMB8J8.0CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J8.0CA-E3/5B, 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 SMB8J8.0CA-E3/5B part is unused and in its original packaging.
Return procedure for SMB8J8.0CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J8.0CA-E3/5B Tags
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