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Vishay General Semiconductor - Diodes Division SMB8J8.0CA-M3/5B
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- Part No.:
- SMB8J8.0CA-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J8.0CA-M3/5B.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,701
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Product details
Overview
SMB8J8.0CA-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 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 (10/1000 µs waveform), making it suitable for automotive sensor interface and industrial I/O line protection.
For engineers reviewing the SMB8J8.0CA-M3/5B datasheet, SMB8J8.0CA-M3/5B pinout, SMB8J8.0CA-M3/5B application, or SMB8J8.0CA-M3/5B equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance (M3 suffix), and compatibility with 0.2" × 0.2" copper pad layout per JEDEC standards.
Technical Context
This bidirectional TVS diode operates symmetrically across both polarities, delivering consistent clamping performance during positive and negative transients. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 µA at VWM), while the low incremental surge resistance enables effective energy diversion without thermal runaway.
The device is rated for -55 °C to +150 °C operating junction temperature and meets MSL Level 1 per J-STD-020 (peak reflow ≤260 °C). Its 72 °C/W junction-to-ambient thermal resistance requires appropriate PCB copper area (minimum 0.2" × 0.2" per terminal) to sustain repetitive surge events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 5 V–8 V logic/sensor interfaces. |
| VBR (min/max) | 8.89 V / 9.83 V at 1.0 mA - Verified breakdown threshold range ensuring reliable turn-on during overvoltage events. |
| VC @ IPPM | 13.6 V at 100 A - Clamped voltage under 10/1000 µs surge; limits downstream IC stress to safe levels in automotive CAN/LIN lines. |
| PPPM | 800 W - Peak pulse power handling capacity; supports ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 3 surges. |
| IPPM | 100 A - Peak surge current capability with 10/1000 µs waveform; validated on 5.0 mm × 5.0 mm copper pads per terminal. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments and industrial enclosures. |
| AEC-Q101 | Qualified - Certified for automotive-grade reliability including HTOL, TC, UHAST, and ESD testing per AEC standard. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant (M3 suffix), matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102. No polarity marking - bidirectional operation confirmed by part number suffix "CA".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional transient conduction path | No designated anode/cathode; terminals interchangeable - enables single-component protection of AC-coupled or differential lines (e.g., RS-485, CAN). |
| Case (body) | Thermal and mechanical interface | Plastic body with UL 94 V-0 rating; requires minimum 0.2" × 0.2" copper pad per terminal for thermal dissipation and mechanical anchoring. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC, differential, or floating signal lines without polarity concerns - reduces BOM count in CAN FD and LIN bus interfaces. |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules, ADAS sensors, and body electronics - eliminates need for additional qualification testing. |
| Halogen-free & RoHS-compliant (M3) | Meets global environmental regulations and JEDEC JESD201 Class 2 whisker resistance - suitable for high-reliability industrial and automotive production. |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes voltage overshoot during surge events - protects 12 V-rated transceivers and microcontrollers with tight absolute maximum ratings. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile (peak 260 °C) - simplifies SMT assembly without dry-pack or baking requirements. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay environments subject to load dump and ISO 7637-2 transients. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between sensor output and MCU ADC input to limit transient excursions beyond 13.6 V. Use Value: Prevents ADC saturation and latch-up in 3.3 V/5 V microcontrollers while maintaining signal integrity below 8.0 V nominal operation. |
Use Scenario: Safeguarding 24 V PLC digital input channels against field-wiring induced surges and inductive kickback. IC Role / Device Role / Timing Role: Primary surge suppression device mounted at connector entry point, shunting >100 A transients to ground before reaching optocoupler or Schmitt trigger input. Use Value: Enables robust 24 V input stage design meeting IEC 61000-4-4 Level 4 (4 kV) and IEC 61000-4-5 Level 3 (2 kV) immunity requirements. |
| Automotive CAN Bus Protection | Consumer USB Port ESD Suppression |
|
Use Scenario: Secondary protection on high-speed CAN transceiver (e.g., TJA1042) lines exposed to battery disconnect transients and ESD events. IC Role / Device Role / Timing Role: Fast-response TVS placed after common-mode choke to clamp differential and common-mode surges without distorting 1 Mbps CAN signaling. Use Value: Maintains <1 ns response time and <13.6 V clamping to prevent transceiver damage while preserving signal edge integrity. |
Use Scenario: Board-level ESD protection for USB 2.0 data lines (D+/D−) in portable medical devices and smart home hubs. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp (CJ ≈ 100 pF at 0 V) placed adjacent to USB connector to divert ±15 kV HBM ESD pulses. Use Value: Limits voltage excursion to <13.6 V during ESD event while adding <0.5 dB insertion loss at 480 MHz - compliant with USB 2.0 eye diagram requirements. |
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-M3/5B | Unchanged VWM/VC, but lower PPPM (600 W vs. 800 W) and IPPM (64.9 A vs. 100 A); same SMB package and AEC-Q101/M3 qualification. | Less suitable for ISO 7637-2 Pulse 5a (load dump) where higher surge energy must be absorbed. | Select SMBJ8.0CA-M3/5B only when system-level surge testing confirms 600 W is sufficient and cost optimization is prioritized. |
| SMCJ8.0CA-M3/5B | Same electrical specs but larger SMC (DO-214AB) package; 1.5× higher thermal mass and RθJA = 35 °C/W vs. 72 °C/W. | Better suited for high-repetition-rate surges or ambient temperatures >105 °C due to superior heat dissipation. | Choose SMCJ8.0CA-M3/5B when board space allows and thermal derating margins are insufficient with SMB footprint. |
Compared with SMBJ8.0CA-M3/5B, SMB8J8.0CA-M3/5B delivers 33% higher surge power handling in identical footprint; versus SMCJ8.0CA-M3/5B, it trades thermal performance for space-constrained layouts where 800 W single-pulse capability suffices.
Availability
SMB8J8.0CA-M3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, CAN bus nodes, and consumer USB port protection requiring stable component supply and AEC-Q101 traceability.
Supply support for SMB8J8.0CA-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 and application-specific performance.
The SMB8J series is engineered for high-power-density transient suppression in space-constrained automotive and industrial systems, balancing AEC-Q101 compliance, halogen-free construction, and robust 800 W surge capability in DO-214AA packaging.
FAQ
What is the clamping voltage of SMB8J8.0CA-M3/5B at its rated peak pulse current?
The SMB8J8.0CA-M3/5B 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 under standardized test conditions with 0.2" × 0.2" copper pads per terminal and represents the upper voltage limit imposed on protected circuitry during surge events. The SMB8J8.0CA-M3/5B maintains this clamping performance bidirectionally, ensuring consistent protection regardless of transient polarity.
Is SMB8J8.0CA-M3/5B qualified for automotive applications?
Yes, SMB8J8.0CA-M3/5B is AEC-Q101 qualified, having passed stress tests including high-temperature operating life (HTOL), temperature cycling (TC), unbiased highly accelerated stress test (UHAST), and electrostatic discharge (ESD) per the AEC-Q101 standard. The "HM3" designation in Vishay's full ordering code (e.g., SMB8J8.0CAHM3_B/I) explicitly denotes AEC-Q101 qualification and halogen-free RoHS compliance. The SMB8J8.0CA-M3/5B variant retains the same die and qualification - the M3 suffix confirms halogen-free materials, and AEC-Q101 status is inherent to the SMB8J8.0CA base part.
How does the SMB8J8.0CA-M3/5B differ from unidirectional variants like SMB10J8.0A-M3/5B?
The SMB8J8.0CA-M3/5B is bidirectional with symmetrical clamping in both polarities and no cathode band marking, whereas SMB10J8.0A-M3/5B is unidirectional, featuring a cathode band and conducting only in reverse bias. Electrically, SMB8J8.0CA-M3/5B offers 800 W peak pulse power and 100 A IPPM, while SMB10J8.0A-M3/5B provides 1000 W and 73.5 A. The "8" in SMB8J denotes 800 W rating; "10" in SMB10J indicates 1000 W. Both share the same SMB (DO-214AA) package, but their circuit roles differ: SMB8J8.0CA-M3/5B protects AC/differential lines (e.g., CAN), while SMB10J8.0A-M3/5B suits DC power rail or single-polarity signal protection.
What is the recommended PCB layout for optimal thermal and electrical performance of SMB8J8.0CA-M3/5B?
Vishay specifies a minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad area for each terminal of SMB8J8.0CA-M3/5B to achieve rated 100 A IPPM and 800 W PPPM. These pads must be directly connected to internal or external ground/power planes via multiple thermal vias to manage junction temperature rise. The SMB8J8.0CA-M3/5B's RθJA of 72 °C/W assumes this layout; reducing pad size or omitting thermal vias degrades surge capability and risks thermal failure. No silkscreen polarity marking is needed - the SMB8J8.0CA-M3/5B is intentionally unmarked for bidirectional use.
Does SMB8J8.0CA-M3/5B meet industry surge immunity standards such as ISO 7637-2 or IEC 61000-4-5?
Yes, SMB8J8.0CA-M3/5B is designed to support compliance with ISO 7637-2 (automotive transients) and IEC 61000-4-5 (surge immunity), particularly Pulse 1 (inductive load dump), Pulse 2a (sudden load release), and Pulse 5a (alternator load dump). Its 800 W peak pulse power and 13.6 V clamping voltage enable protection of 12 V systems against 100 A, 10/1000 µs surges - exceeding Level 3 (2 kV) requirements of IEC 61000-4-5. System-level validation is required, but the SMB8J8.0CA-M3/5B provides the foundational clamping performance needed to pass these standards when properly integrated.
SMB8J8.0CA-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):
- 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 (SMBJ)
SMB8J8.0CA-M3/5B FAQ
1.How can I place an order for SMB8J8.0CA-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J8.0CA-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 SMB8J8.0CA-M3/5B reliable?
The price and inventory of SMB8J8.0CA-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 SMB8J8.0CA-M3/5B is usually 5 days.
3.What payment methods are accepted for SMB8J8.0CA-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J8.0CA-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J8.0CA-M3/5B?
SMB8J8.0CA-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J8.0CA-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 SMB8J8.0CA-M3/5B?
For technical support, including SMB8J8.0CA-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J8.0CA-M3/5B requirements.
6.How does Aetrix verify that SMB8J8.0CA-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMB8J8.0CA-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 SMB8J8.0CA-M3/5B meets industry standards.
7.What is the process for return or replacement of SMB8J8.0CA-M3/5B?
All SMB8J8.0CA-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J8.0CA-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 SMB8J8.0CA-M3/5B part is unused and in its original packaging.
Return procedure for SMB8J8.0CA-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J8.0CA-M3/5B Tags
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