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Vishay General Semiconductor - Diodes Division SMB8J5.0CA-M3/5B
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- Part No.:
- SMB8J5.0CA-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J5.0CA-M3/5B.pdf
- Description:
- TVS DIODE 5VWM 9.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,508
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Product details
Overview
SMB8J5.0CA-M3/5B 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 a 5.0 V stand-off voltage (VWM), 6.4–7.25 V breakdown voltage (VBR) at 10 mA, 9.2 V clamping voltage (VC) at 2000 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 SMB8J5.0CA-M3/5B datasheet, SMB8J5.0CA-M3/5B pinout, SMB8J5.0CA-M3/5B application, or SMB8J5.0CA-M3/5B equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance (M3 suffix), 150 °C max junction temperature, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bidirectional TVS diode operates symmetrically across both polarities, enabling robust protection against ESD, lightning-induced transients, and inductive switching spikes without polarity sensitivity. Its glass-passivated junction ensures stable VBR tolerance (±10% typical), low incremental surge resistance, and fast response time (<1 ns), meeting ANSI/IEEE C62.35 standards for transient suppression.
Thermally, it delivers RθJA = 72 °C/W and RθJL = 20 °C/W, supporting reliable operation up to 150 °C junction temperature. The device is qualified to AEC-Q101 and rated MSL Level 1 (260 °C reflow peak), confirming suitability for automotive under-hood and chassis-mounted electronics where thermal cycling and long-term reliability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 5.0 V - maximum reverse stand-off voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR min/max | 6.40 V / 7.25 V at IT = 10 mA - guaranteed breakdown range ensuring consistent turn-on behavior across production lots |
| VC @ IPPM | 9.2 V at IPPM = 2000 A (10/1000 µs) - clamping voltage limiting downstream IC stress during worst-case surge events |
| PPPM | 800 W - peak pulse power handling capacity defining transient energy absorption capability per IEEE C62.35 |
| ID @ VWM | 2000 µA max - low reverse leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits |
| TJ max | +150 °C - enables deployment in under-hood automotive environments and industrial enclosures without derating |
| Package | SMB (DO-214AA) - surface-mount outline with 5.59 mm × 4.06 mm footprint, optimized for automated pick-and-place and thermal pad layout |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 compliant. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); cathode band not marked (bidirectional).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional transient conduction path | No polarity marking; terminals interchangeable - provides identical clamping in either direction for AC-coupled or floating lines |
| Case (body) | Thermal and mechanical interface | Non-electrical; requires minimum 5.0 mm × 5.0 mm copper pad per terminal for specified RθJA and PPPM derating |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and body electronics per stress test requirements |
| Halogen-free & RoHS-compliant (M3) | Meets JESD201 Class 2 whisker resistance and global environmental compliance mandates for Tier 1 supply chains |
| Low-profile SMB package | 2.2 mm height enables use in space-constrained modules such as camera ECUs and battery management subsystems |
| Fast response time < 1 ns | Clamps transients before sensitive logic or analog circuitry sustains damage - critical for CAN, LIN, and sensor signal lines |
| 800 W peak pulse power (10/1000 µs) | Withstands ISO 7637-2 Pulse 1/2/5a/b surges and IEC 61000-4-5 Level 4 (4 kV) without degradation |
Applications
| Automotive Sensor Interface | Industrial I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors in engine control units exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt surge energy before reaching ADC input or signal conditioner. Use Value: Maintains <5.0 V signal integrity during 2000 A transients while surviving 150 °C ambient - validated per AEC-Q101 HTOL and TC testing. | Use Scenario: Safeguarding RS-485/RS-232 communication ports on PLC backplanes subjected to field wiring ESD and ground loop surges. IC Role / Device Role / Timing Role: Primary line-level TVS on differential pair inputs, coordinated with common-mode chokes to meet IEC 61000-4-2/4-4/4-5 immunity requirements. Use Value: 9.2 V clamping ensures transceiver ICs (e.g., SN65HVD230) remain within absolute maximum ratings during 4 kV contact discharge events. |
| Consumer Power Adapter Input | Telecom DC Power Feed |
Use Scenario: Secondary-side overvoltage suppression on 5 V USB-C PD adapter outputs prone to feedback loop failure or hot-swap transients. IC Role / Device Role / Timing Role: Fast-acting crowbar device across VBUS/GND, triggered before downstream USB controller latches or resets. Use Value: Sub-1 ns response prevents >12 V excursion beyond USB spec limits; M3 suffix ensures compliance with EU EcoDesign Directive. | Use Scenario: Surge protection on -48 V DC telecom power feeds entering remote radio units (RRUs), exposed to lightning-induced longitudinal surges. IC Role / Device Role / Timing Role: Bidirectional clamp between tip/ring and shield, referenced to chassis ground to divert common-mode energy. Use Value: 800 W rating supports GR-1089-CORE Level 3 (10/1000 µs, 100 A) compliance without thermal runaway under repeated stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ5.0CA-M3/5B | Unidirectional variant with same VWM/VBR/VC but asymmetric conduction; lower IPPM (1000 A) and PPPM (600 W) | Suitable only for DC-biased lines where polarity is fixed; not usable on AC or floating signals | Select SMBJ5.0CA-M3/5B only when circuit topology guarantees unidirectional surge polarity and lower energy levels suffice. |
| SMAJ5.0CA-M3/5B | Same electrical specs but in smaller SMA (DO-214AC) package; 400 W PPPM rating and higher RθJA (110 °C/W) | Limited to lower-power consumer or non-automotive applications due to reduced thermal mass and surge capacity | Choose SMAJ5.0CA-M3/5B only for cost-sensitive, space-constrained designs with <400 W surge exposure and no AEC-Q101 requirement. |
Compared with SMBJ5.0CA-M3/5B and SMAJ5.0CA-M3/5B, the SMB8J5.0CA-M3/5B delivers 33% higher peak pulse power (800 W vs. 600 W/400 W), AEC-Q101 qualification, and superior thermal performance - making it the preferred choice for automotive and industrial systems requiring sustained surge resilience and long-term reliability.
Availability
SMB8J5.0CA-M3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial I/O protection, consumer power adapter outputs, and telecom DC feed applications requiring stable component supply, halogen-free compliance, and AEC-Q101 validation.
Supply support for SMB8J5.0CA-M3/5B 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SMB8J series belongs to Vishay's TRANSZORB® TVS portfolio, engineered specifically for high-energy bidirectional surge suppression in harsh environments - targeting automotive, industrial automation, and infrastructure equipment where AEC-Q101 compliance and thermal robustness are mandatory.
FAQ
What is the clamping voltage of SMB8J5.0CA-M3/5B at its rated peak pulse current?
The SMB8J5.0CA-M3/5B has a maximum clamping voltage (VC) of 9.2 V when subjected to its rated peak pulse current (IPPM) of 2000 A using the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures protected circuits remain within safe operating limits during surge events. The SMB8J5.0CA-M3/5B maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMB8J5.0CA-M3/5B suitable for automotive applications?
Yes, SMB8J5.0CA-M3/5B is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood and chassis-mounted systems. Its halogen-free M3 construction, 150 °C maximum junction temperature, and MSL Level 1 reflow compatibility meet stringent automotive manufacturing and reliability requirements. The SMB8J5.0CA-M3/5B is commonly deployed in ADAS sensor modules, engine control units, and body electronics for transient protection.
How does the SMB8J5.0CA-M3/5B differ from the SMBJ5.0CA-M3/5B?
The SMB8J5.0CA-M3/5B is bidirectional with 800 W peak pulse power and 2000 A IPPM, whereas the SMBJ5.0CA-M3/5B is unidirectional with 600 W PPPM and 1000 A IPPM. Both share the same VWM (5.0 V) and VC (9.2 V), but the SMB8J5.0CA-M3/5B supports AC-coupled or floating signal lines, while SMBJ5.0CA-M3/5B requires defined polarity. The SMB8J5.0CA-M3/5B also carries AEC-Q101 qualification by default in M3 configuration.
What is the thermal resistance of SMB8J5.0CA-M3/5B, and how does it affect PCB layout?
The SMB8J5.0CA-M3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per terminal. To achieve this rating, PCB layout must follow Vishay's recommended pad dimensions and avoid excessive trace length or isolation. Reducing copper area increases RθJA, causing higher junction temperatures during repetitive surges - potentially degrading long-term reliability of the SMB8J5.0CA-M3/5B.
Does SMB8J5.0CA-M3/5B require polarity-aware placement on the PCB?
No, SMB8J5.0CA-M3/5B is a bidirectional TVS diode with symmetrical electrical characteristics; it has no cathode marking and can be placed in either orientation on the PCB. This eliminates polarity-check steps during assembly and simplifies layout for differential or AC-coupled lines. Unlike unidirectional variants such as SMBJ5.0CA-M3/5B, the SMB8J5.0CA-M3/5B functions identically regardless of terminal connection order.
SMB8J5.0CA-M3/5B 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):
- 5V
- Voltage - Breakdown (Min):
- 6.4V
- Voltage - Clamping (Max) @ Ipp:
- 9.2V
- Current - Peak Pulse (10/1000µs):
- 87A
- 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 (SMBJ)
SMB8J5.0CA-M3/5B FAQ
1.How can I place an order for SMB8J5.0CA-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J5.0CA-M3/5B 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 SMB8J5.0CA-M3/5B reliable?
The price and inventory of SMB8J5.0CA-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J5.0CA-M3/5B is usually 5 days.
3.What payment methods are accepted for SMB8J5.0CA-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J5.0CA-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J5.0CA-M3/5B?
SMB8J5.0CA-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J5.0CA-M3/5B 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 SMB8J5.0CA-M3/5B?
For technical support, including SMB8J5.0CA-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J5.0CA-M3/5B requirements.
6.How does Aetrix verify that SMB8J5.0CA-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMB8J5.0CA-M3/5B 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 SMB8J5.0CA-M3/5B meets industry standards.
7.What is the process for return or replacement of SMB8J5.0CA-M3/5B?
All SMB8J5.0CA-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J5.0CA-M3/5B, 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 SMB8J5.0CA-M3/5B part is unused and in its original packaging.
Return procedure for SMB8J5.0CA-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J5.0CA-M3/5B Tags
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