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Vishay General Semiconductor - Diodes Division SMB8J7.0CAHM3_A/H
- Part No.:
- SMB8J7.0CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J7.0CAHM3_A/H.pdf
- Description:
- TVS DIODE 7VWM 12VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,505
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Product details
Overview
SMB8J7.0CAHM3_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 SMB8J7.0CAHM3_A/H datasheet, SMB8J7.0CAHM3_A/H pinout, SMB8J7.0CAHM3_A/H application, or SMB8J7.0CAHM3_A/H equivalent, this device is evaluated for AEC-Q101 qualification, low clamping ratio (VC/VWM = 1.71), and compatibility with automated SMT assembly on 5.0 mm × 5.0 mm copper pads per JEDEC standard.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling robust protection against ESD, lightning-induced surges, and inductive switching transients without polarity sensitivity. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 µA at VWM), while MSL Level 1 rating supports lead-free reflow up to 260 °C peak.
The device delivers 800 W peak pulse power handling with 12.0 V clamping at 400 A IPPM under 10/1000 µs waveform, and exhibits 72 °C/W junction-to-ambient thermal resistance - requiring careful PCB thermal pad design to sustain repetitive surge events at elevated ambient temperatures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 5 V–6 V logic/sensor rails. |
| VBR min / max | 7.78 V / 8.60 V at 10 mA - verified breakdown threshold range ensuring consistent turn-on across production lots. |
| VC @ IPPM | 12.0 V at 400 A - clamping voltage limits downstream IC stress during 800 W transient events. |
| PPPM | 800 W (10/1000 µs) - energy-handling capacity suitable for ISO 7637-2 Pulse 1/2b and IEC 61000-4-5 Level 3 surges. |
| ID @ VWM | <1.0 µA - ultra-low leakage preserves signal integrity and battery life in always-on sensor nodes. |
| TJ max | +150 °C - enables operation in under-hood automotive environments and industrial enclosures. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22-A114. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated terminals solderable per J-STD-002. No polarity marking - bidirectional symmetry eliminates orientation concerns during placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; no cathode band - simplifies layout and eliminates reverse-assembly risk. |
| Cathode (not applicable) | N/A | Bidirectional construction means neither terminal is designated cathode; device clamps equally in either direction. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and ADAS sensor interfaces. |
| MSL Level 1 | Supports lead-free reflow up to 260 °C peak without moisture-induced popcorn failure. |
| Glass-passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift. |
| Low clamping ratio (VC/VWM = 1.71) | Minimizes overvoltage exposure to protected ICs compared to higher-ratio alternatives. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets automotive OEM environmental requirements and JESD201 Class 2 whisker resistance. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt transients before reaching PHY layer. Use Value: 12.0 V clamping ensures MCU GPIOs and transceivers remain below absolute maximum ratings during ISO 16750-2 load dump events. |
Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers against field-wiring surges and relay coil flyback. IC Role / Device Role / Timing Role: Primary surge suppression device mounted adjacent to terminal block to intercept fast-rising transients before signal conditioning circuitry. Use Value: 800 W PPPM rating sustains repeated 1 kV/500 A surges per IEC 61000-4-5, extending system uptime in factory automation. |
| USB Type-C Port Protection | Smart Meter Communication Interface |
|
Use Scenario: Shielding USB 2.0 D+/D− lines in automotive infotainment head units from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed inline with data lines to clamp ±15 kV contact ESD per IEC 61000-4-2 without signal distortion. Use Value: Sub-1 µA leakage at 7.0 V VWM prevents DC bias shift in high-impedance USB receiver circuits. |
Use Scenario: Securing RS-485/MBus communication ports in electricity meters exposed to grid-induced surges and lightning coupling. IC Role / Device Role / Timing Role: Front-end transient suppressor on differential bus lines to limit common-mode overvoltage seen by isolated transceivers. Use Value: Symmetrical clamping maintains differential integrity during asymmetric surges, preserving data integrity over long-distance metering links. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J7.0CAHE3_A/H | Same electrical specs; RoHS-compliant but not halogen-free; lacks JESD201 Class 2 whisker resistance. | Approved for commercial/industrial use; not certified for automotive under hood. | Select when halogen-free requirement is waived and cost optimization is prioritized. |
| SMAJ7.0CA | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (90 °C/W), same VWM/VC. | Suitable for space-constrained consumer electronics; insufficient for automotive load dump duty cycles. | Choose only for non-automotive, low-duty-cycle applications where board area is critical. |
Compared with SMB8J7.0CAHE3_A/H, the HM3 variant adds halogen-free compliance and whisker resistance for automotive use; versus SMAJ7.0CA, SMB8J7.0CAHM3_A/H provides double the surge power handling and superior thermal dissipation for sustained industrial operation.
Availability
SMB8J7.0CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and smart meter communication interfaces requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for SMB8J7.0CAHM3_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 designs and manufactures discrete semiconductors including diodes, MOSFETs, and TVS devices, with emphasis on reliability, power density, and automotive qualification.
The SMB8J7.0CAHM3_A/H belongs to Vishay's TRANSZORB® family of high-power-density TVS diodes, engineered specifically for AEC-Q101-compliant surge protection in harsh automotive and industrial environments.
FAQ
What is the clamping voltage of SMB8J7.0CAHM3_A/H at its rated peak pulse current?
The SMB8J7.0CAHM3_A/H has a maximum clamping voltage (VC) of 12.0 V at 400 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures protected circuitry remains within safe operating limits during surge events. The SMB8J7.0CAHM3_A/H achieves this with a low clamping ratio of 1.71 (VC/VWM), making it effective for safeguarding sensitive 5 V–6 V interface ICs.
Is SMB8J7.0CAHM3_A/H suitable for automotive applications?
Yes, SMB8J7.0CAHM3_A/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance. It is explicitly intended for automotive use cases such as sensor protection, body control modules, and infotainment interfaces. The SMB8J7.0CAHM3_A/H meets MSL Level 1 and operates from –55 °C to +150 °C, fulfilling under-hood thermal and reliability requirements.
How does the bidirectional configuration of SMB8J7.0CAHM3_A/H affect PCB layout?
The SMB8J7.0CAHM3_A/H has no polarity marking and functions identically in both directions, eliminating orientation constraints during SMT placement. This simplifies PCB layout - no silkscreen polarity indicator is needed, and routing symmetry is not required. Engineers can place the SMB8J7.0CAHM3_A/H inline on differential or single-ended lines without concern for anode/cathode alignment, reducing assembly errors and supporting automated optical inspection.
What is the thermal resistance of SMB8J7.0CAHM3_A/H, and how does it impact surge handling?
The SMB8J7.0CAHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per JEDEC standards. This value directly affects its ability to dissipate heat during repetitive surges: higher ambient temperatures or inadequate copper area will reduce safe surge repetition rate. For sustained operation, the SMB8J7.0CAHM3_A/H requires adherence to the derating curve in Figure 2 of its datasheet.
Does SMB8J7.0CAHM3_A/H meet industry surge immunity standards?
Yes, SMB8J7.0CAHM3_A/H supports compliance with key surge immunity standards including IEC 61000-4-5 (Level 3: 1 kV line-earth, 2 kV line-line), ISO 7637-2 (Pulse 1, 2b, 3a/b), and ISO 16750-2 (load dump). Its 800 W peak pulse power rating and 12.0 V clamping voltage enable system-level protection when combined with appropriate PCB layout - such as short traces and dedicated ground planes - as validated in Vishay's application notes for the SMB8J7.0CAHM3_A/H.
SMB8J7.0CAHM3_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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB8J7.0CAHM3_A/H FAQ
1.How can I place an order for SMB8J7.0CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J7.0CAHM3_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 SMB8J7.0CAHM3_A/H reliable?
The price and inventory of SMB8J7.0CAHM3_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 SMB8J7.0CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMB8J7.0CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J7.0CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J7.0CAHM3_A/H?
SMB8J7.0CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J7.0CAHM3_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 SMB8J7.0CAHM3_A/H?
For technical support, including SMB8J7.0CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J7.0CAHM3_A/H requirements.
6.How does Aetrix verify that SMB8J7.0CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMB8J7.0CAHM3_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 SMB8J7.0CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMB8J7.0CAHM3_A/H?
All SMB8J7.0CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J7.0CAHM3_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 SMB8J7.0CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMB8J7.0CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J7.0CAHM3_A/H Tags
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