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Vishay General Semiconductor - Diodes Division SMB8J7.0CAHE3_A/H
- Part No.:
- SMB8J7.0CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J7.0CAHE3_A/H.pdf
- Description:
- TVS DIODE 7VWM 12VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,153
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Product details
Overview
SMB8J7.0CAHE3_A/H 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 7.0 V stand-off voltage (VWM), 12.0 V clamping voltage (VC) at 400 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 µs waveform - optimized for automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J7.0CAHE3_A/H datasheet, SMB8J7.0CAHE3_A/H pinout, SMB8J7.0CAHE3_A/H application, or SMB8J7.0CAHE3_A/H equivalent, key selection criteria include AEC-Q101 qualification, bidirectional polarity, low clamping ratio (VC/VWM = 1.71), and compatibility with automated SMT assembly on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamping protector using an avalanche breakdown mechanism, with bidirectional symmetry enabling suppression of both positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while MSL Level 1 rating supports lead-free reflow up to 260 °C.
The SMB8J7.0CAHE3_A/H delivers 800 W peak pulse power handling per IEC 61000-4-5 (10/1000 µs) and maintains clamping performance across -55 °C to +150 °C operating junction temperature range. Thermal resistance (RθJA = 72 °C/W) and RθJL = 20 °C/W support reliable power dissipation in compact PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 5 V–7 V signal/power rails. |
| VBR min/max | 7.78 V / 8.60 V at 10 mA - verified breakdown threshold ensures consistent turn-on behavior across production lots. |
| VC @ IPPM | 12.0 V at 400 A - clamping voltage limits downstream IC stress during 800 W surge events (10/1000 µs). |
| PPPM | 800 W - peak pulse power rating determines survivability against lightning-induced surges and inductive switching spikes. |
| ID @ VWM | <1.0 µA - ultra-low reverse leakage preserves signal integrity and battery life in always-on circuits. |
| TJ max | +150 °C - enables deployment in under-hood automotive environments and thermally constrained industrial enclosures. |
| 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); cathode band absent per bidirectional design.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | Either terminal serves as input/output; no DC polarity dependency - simplifies layout and eliminates orientation errors in automated placement. |
| Case (cathode band omitted) | Thermal and electrical reference plane | Exposed metal slug provides low-inductance path to PCB copper pour; requires minimum 5.0 mm × 5.0 mm thermal pad per terminal for rated PPPM. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements - suitable for ADAS sensors, body control modules, and infotainment I/O protection. |
| Glass passivated junction | Stable VBR tolerance (±5%) and low leakage over lifetime - critical for long-term reliability in harsh thermal/humidity environments. |
| MSL Level 1, 260 °C peak | Compatible with standard lead-free reflow profiles without pre-baking - reduces manufacturing complexity and cost. |
| Low clamping ratio (VC/VWM = 1.71) | Minimizes voltage overshoot during surge events - protects 3.3 V and 5 V logic interfaces without additional series impedance. |
| UL 94 V-0 molding compound | Flame-retardant encapsulation meets safety standards for industrial and transportation equipment enclosures. |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and MEMS pressure/temperature sensors from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector entry point to shunt transients before reaching signal conditioning circuitry. Use Value: Maintains 12.0 V clamping under 400 A surge while surviving repeated 150 °C junction temperatures - extends field life in engine bay deployments. |
Use Scenario: Safeguarding 4–20 mA current loop inputs on programmable logic controllers exposed to motor drive noise and relay switching spikes. IC Role / Device Role / Timing Role: Primary overvoltage clamp on analog front-end terminals, coordinated with series current-limiting resistors. Use Value: 7.0 V VWM aligns with 24 V system rail derating; 800 W PPPM handles repetitive 10/1000 µs surges common in factory automation environments. |
| USB 2.0 Data Line Protection | Smart Meter Communication Port |
|
Use Scenario: ESD and surge protection for D+ and D- lines in automotive infotainment USB ports subjected to ±15 kV contact discharge. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed adjacent to USB connector to minimize signal distortion. Use Value: Sub-1 µA leakage at 7.0 V prevents data line bias shift; symmetric clamping avoids differential skew during fast transients. |
Use Scenario: Securing RS-485 and PLC communication interfaces in utility smart meters installed in outdoor substations. IC Role / Device Role / Timing Role: First-line transient suppressor on communication port PCB, upstream of isolation barriers and transceivers. Use Value: AEC-Q101 qualification ensures compliance with IEC 61000-4-5 Level 4 (4 kV surge) and extended temperature operation (-40 °C to +85 °C ambient). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J7.0CAHM3_A/H | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected when halogen-free material compliance is mandated by OEM or regional regulations. | Direct material substitution where halogen content must be minimized - same footprint, thermal profile, and surge performance. |
| SMBJ7.0CAHE3_A/H | Unchanged VWM (7.0 V) and VC (12.0 V), but lower PPPM (600 W) and IPPM (300 A); same SMB package and AEC-Q101 rating. | Suitable for lower-energy threat environments (e.g., consumer IoT gateways), not recommended for automotive load dump. | Cost-optimized alternative when full 800 W surge immunity is not required - verify system-level surge test compliance before adoption. |
Compared with SMB8J7.0CAHE3_A/H, the HM3 variant offers identical protection performance with halogen-free construction, while SMBJ7.0CAHE3_A/H trades 25% lower surge capacity for reduced bill-of-materials cost in less demanding applications.
Availability
SMB8J7.0CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC analog inputs, USB 2.0 data line protection, and smart meter communication ports requiring stable component supply and AEC-Q101 assurance.
Supply support for SMB8J7.0CAHE3_A/H 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, power density, and automotive qualification.
The SMB8JxxCAHE3 series targets high-reliability transient suppression in automotive and industrial systems, delivering AEC-Q101-compliant TVS performance in low-profile SMB packages for space-constrained designs.
FAQ
What is the clamping voltage of SMB8J7.0CAHE3_A/H at its rated peak pulse current?
The SMB8J7.0CAHE3_A/H has a maximum clamping voltage (VC) of 12.0 V when subjected to its rated peak pulse current (IPPM) of 400 A with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's datasheet revision 09-Jan-2024, ensuring predictable overvoltage limiting for downstream 5 V and 7 V circuits. The SMB8J7.0CAHE3_A/H maintains this clamping performance across its full operating temperature range.
Is SMB8J7.0CAHE3_A/H suitable for automotive applications?
Yes, SMB8J7.0CAHE3_A/H is AEC-Q101 qualified and specifically designed for automotive use cases including sensor interface protection, infotainment USB ports, and body control module I/O lines. Its construction includes glass-passivated junctions, MSL Level 1 moisture sensitivity, and operation up to +150 °C junction temperature - all validated per automotive reliability standards. The SMB8J7.0CAHE3_A/H meets requirements for under-hood and cabin-mounted electronics.
How does the bidirectional configuration of SMB8J7.0CAHE3_A/H affect PCB layout?
The SMB8J7.0CAHE3_A/H has no polarity marking and symmetrical terminal behavior, eliminating orientation constraints during placement. Engineers can route either terminal to the protected line without regard to DC polarity - simplifying layout, reducing assembly errors, and enabling reuse across both positive- and negative-going transient paths. This symmetry also avoids differential timing skew in high-speed data line protection, unlike unidirectional TVS devices.
What is the thermal resistance of SMB8J7.0CAHE3_A/H, and how does it impact PCB design?
SMB8J7.0CAHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W. To achieve rated 800 W pulse power, the datasheet specifies mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. Reducing pad area or omitting thermal vias increases junction temperature rise, potentially derating surge capability - so SMB8J7.0CAHE3_A/H layout must follow Vishay's recommended pad dimensions and copper weight.
Does SMB8J7.0CAHE3_A/H meet RoHS and halogen-free requirements?
SMB8J7.0CAHE3_A/H is RoHS-compliant per EU Directive 2011/65/EU and carries the "HE3" suffix indicating RoHS compliance and AEC-Q101 qualification. It is not halogen-free; for halogen-free compliance, the equivalent SMB8J7.0CAHM3_A/H (HM3 suffix) should be selected. Both variants share identical electrical performance, package, and qualification status - only material composition differs.
SMB8J7.0CAHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 66.7A
- 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)
SMB8J7.0CAHE3_A/H FAQ
1.How can I place an order for SMB8J7.0CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J7.0CAHE3_A/H 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 SMB8J7.0CAHE3_A/H reliable?
The price and inventory of SMB8J7.0CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J7.0CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMB8J7.0CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J7.0CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J7.0CAHE3_A/H?
SMB8J7.0CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J7.0CAHE3_A/H 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 SMB8J7.0CAHE3_A/H?
For technical support, including SMB8J7.0CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J7.0CAHE3_A/H requirements.
6.How does Aetrix verify that SMB8J7.0CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMB8J7.0CAHE3_A/H 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 SMB8J7.0CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMB8J7.0CAHE3_A/H?
All SMB8J7.0CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J7.0CAHE3_A/H, 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 SMB8J7.0CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMB8J7.0CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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