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Vishay General Semiconductor - Diodes Division SMBJ8.0CAHE3/52
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- Part No.:
- SMBJ8.0CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ8.0CAHE3/52.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,094
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Product details
Overview
SMBJ8.0CAHE3/52 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features 600 W peak pulse power (10/1000 µs), 13.6 V maximum clamping voltage at 44.1 A peak pulse current, and 8.0 V stand-off voltage - deployed in automotive sensor interfaces, industrial I/O protection, and telecom line surge suppression.
For engineers reviewing the SMBJ8.0CAHE3/52 datasheet, SMBJ8.0CAHE3/52 pinout, SMBJ8.0CAHE3/52 application, or SMBJ8.0CAHE3/52 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 100 °C/W junction-to-ambient thermal resistance, and compatibility with automated SMT assembly on standard PCB pad layouts.
Technical Context
This device operates as a voltage-clamped transient protector with symmetrical breakdown behavior in both polarities. Its glass-passivated junction delivers fast response time (<1 ns), low incremental surge resistance, and stable clamping under repetitive 10/1000 µs surges at 0.01% duty cycle.
The SMBJ8.0CAHE3/52 is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020 (260 °C reflow peak), and supports bidirectional surge suppression without polarity sensitivity - eliminating need for orientation-aware placement in differential or AC-coupled signal paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 8.0 V - maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping threshold |
| Breakdown Voltage (VBR min/max) | 8.89 V / 9.83 V at 1 mA - guaranteed conduction onset range; ensures predictable turn-on during overvoltage events |
| Maximum Clamping Voltage (VC) | 13.6 V at 44.1 A IPPM - peak voltage seen by protected circuit during 600 W transient; critical for IC-level voltage tolerance |
| Peak Pulse Power (PPPM) | 600 W (10/1000 µs waveform) - standardized surge energy handling capacity; validates robustness against IEC 61000-4-5 Level 4 threats |
| Junction Temperature Range | -55 °C to +150 °C - enables deployment in under-hood automotive, industrial control cabinets, and outdoor telecom enclosures |
| Thermal Resistance (RθJA) | 100 °C/W - determines allowable power dissipation on standard 0.2" × 0.2" copper pads; guides thermal pad design |
| AEC-Q101 Qualified | Yes - certified for automotive electronics per stress test requirements; supports PPAP documentation for Tier 1 suppliers |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - terminals are symmetric anode/cathode pair.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no orientation required during placement |
| Terminal 2 | Anode/Cathode (bidirectional) | Paired terminal completing symmetrical clamping path; enables protection of AC signals and floating buses |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled lines, RS-485 buses, and ungrounded sensor outputs without polarity constraints |
| 600 W peak pulse power | Withstands IEC 61000-4-5 4th-level surge (4 kV line-earth, 2 kV line-line) when mounted per recommended pad layout |
| AEC-Q101 qualification | Validates reliability for automotive applications including body control modules, ADAS sensor interfaces, and infotainment power rails |
| MSL Level 1 rating | Supports lead-free reflow up to 260 °C peak without moisture-induced failure; eliminates bake-out requirement pre-assembly |
| Glass-passivated junction | Ensures stable VBR over lifetime and improved resistance to humidity-induced parameter drift in harsh environments |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
|
Use Scenario: Protecting CAN FD and LIN bus transceivers from load dump and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential bus lines to clamp common-mode transients while preserving signal integrity. Use Value: Limits voltage excursion to ≤13.6 V during 44.1 A surges, preventing damage to 12 V-rated transceivers and maintaining communication uptime. |
Use Scenario: Safeguarding PLC analog input channels (4–20 mA, 0–10 V) against field-wiring induced surges. IC Role / Device Role / Timing Role: Standoff-connected TVS shunting transients before they reach precision ADC front-end and isolation barrier. Use Value: Maintains 8.0 V standoff margin below system rail while clamping to 13.6 V - compatible with 15 V input protection stages. |
| Telecom Line Surge Suppression | Consumer Device USB Port Protection |
|
Use Scenario: Shielding Ethernet PHY magnetics and PoE injectors from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-level TVS on secondary side of isolation transformer, absorbing common-mode energy before it couples into silicon. Use Value: 600 W rating handles multi-kA induced currents; bidirectional symmetry avoids polarity misalignment in transformer-coupled designs. |
Use Scenario: ESD and hot-swap transient protection on USB 2.0 data lines and VBUS in portable audio/video devices. IC Role / Device Role / Timing Role: Low-capacitance TVS (typ. <50 pF) placed directly at connector to divert sub-ns ESD pulses away from USB transceiver. Use Value: Clamps 8 kV contact ESD to <13.6 V within <1 ns - meets IEC 61000-4-2 Level 4 without degrading 480 Mbps signal integrity. |
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-M3/52 | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification; same SMB package | No difference in circuit function or layout; selected where halogen-free compliance is mandated by OEM environmental policy | Choose SMBJ8.0CA-M3/52 when halogen-free material content is required; otherwise SMBJ8.0CAHE3/52 satisfies standard automotive and industrial use cases. |
| SMCJ8.0CAHE3/52 | Same VWM/VBR/VC specs but in larger SMC (DO-214AB) package; 1500 W PPPM rating; higher thermal mass and lower RθJA (50 °C/W) | Used where higher surge energy handling or improved thermal performance is needed - e.g., primary-side AC input protection | Choose SMCJ8.0CAHE3/52 only if 1500 W surge rating or lower thermal resistance is required; SMBJ8.0CAHE3/52 remains optimal for space-constrained board-level protection. |
Compared with SMBJ8.0CA-M3/52, the SMBJ8.0CAHE3/52 offers identical protection performance with standard RoHS compliance; versus SMCJ8.0CAHE3/52, it trades surge margin and thermal headroom for compact SMB footprint - making it ideal for dense automotive and telecom PCB layouts.
Availability
SMBJ8.0CAHE3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial I/O protection, and telecom line surge suppression requiring stable component supply across production lifecycles.
Supply support for SMBJ8.0CAHE3/52 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 and automotive-grade qualification.
The SMBJ series targets board-level transient suppression in space-constrained, high-reliability applications - engineered specifically for AEC-Q101 compliance, automated SMT compatibility, and consistent clamping performance across temperature.
FAQ
What does the "HE3" suffix indicate in SMBJ8.0CAHE3/52?
The "HE3" suffix denotes that SMBJ8.0CAHE3/52 is RoHS-compliant and AEC-Q101 qualified. It confirms compliance with automotive reliability standards and lead-free soldering requirements, distinguishing it from commercial-grade variants like SMBJ8.0CA-E3/52. This makes SMBJ8.0CAHE3/52 suitable for automotive ECUs, ADAS sensors, and industrial control units requiring validated long-term stability.
Is SMBJ8.0CAHE3/52 unidirectional or bidirectional?
SMBJ8.0CAHE3/52 is a bidirectional TVS diode, as indicated by the "CA" suffix. It provides symmetrical clamping in both polarities, with identical breakdown and clamping characteristics regardless of voltage polarity. This eliminates orientation concerns during placement and enables protection of AC signals, differential buses, and floating nodes - unlike unidirectional "A" variants which require correct cathode alignment.
What is the maximum clamping voltage of SMBJ8.0CAHE3/52 and at what current?
The maximum clamping voltage (VC) of SMBJ8.0CAHE3/52 is 13.6 V, measured at a peak pulse current (IPPM) of 44.1 A using the standard 10/1000 µs waveform. This value represents the worst-case voltage imposed on the protected circuit during a full-rated 600 W transient event, ensuring downstream components rated for ≥15 V operation remain within safe operating limits.
Does SMBJ8.0CAHE3/52 require special PCB layout considerations?
Yes - SMBJ8.0CAHE3/52 must be mounted on minimum recommended pad layout: 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated 600 W pulse power and 100 °C/W thermal resistance. Short, low-inductance traces to protected nodes are essential; ground plane connection should be direct and low-impedance to minimize clamping overshoot during fast transients.
How does SMBJ8.0CAHE3/52 compare to SMAJ8.0CAHE3/52 in terms of surge capability?
SMBJ8.0CAHE3/52 delivers 600 W peak pulse power, while SMAJ8.0CAHE3/52 is rated for 400 W - a 50% lower surge energy capacity. The SMB package also offers better thermal performance than SMA (DO-214AC), with lower junction-to-lead resistance. For applications exposed to IEC 61000-4-5 Level 4 surges or repeated transients, SMBJ8.0CAHE3/52 provides superior margin and reliability compared to SMAJ8.0CAHE3/52.
SMBJ8.0CAHE3/52 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):
- 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)
SMBJ8.0CAHE3/52 FAQ
1.How can I place an order for SMBJ8.0CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ8.0CAHE3/52 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 SMBJ8.0CAHE3/52 reliable?
The price and inventory of SMBJ8.0CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ8.0CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ8.0CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ8.0CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ8.0CAHE3/52?
SMBJ8.0CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ8.0CAHE3/52 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 SMBJ8.0CAHE3/52?
For technical support, including SMBJ8.0CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ8.0CAHE3/52 requirements.
6.How does Aetrix verify that SMBJ8.0CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ8.0CAHE3/52 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 SMBJ8.0CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ8.0CAHE3/52?
All SMBJ8.0CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ8.0CAHE3/52, 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 SMBJ8.0CAHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ8.0CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ8.0CAHE3/52 Tags
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