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Vishay General Semiconductor - Diodes Division SMCJ7.0CAHM3_A/I
- Part No.:
- SMCJ7.0CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ7.0CAHM3_A/I.pdf
- Description:
- TVS DIODE 7VWM 12VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,662
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Product details
Overview
SMCJ7.0CAHM3_A/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 7.0 V stand-off voltage (VWM), 12.0 V maximum clamping voltage (VC) at 125 A peak pulse current (IPPM), and 1500 W peak pulse power dissipation (PPPM) with 10/1000 µs waveform - deployed on power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMCJ7.0CAHM3_A/I datasheet, SMCJ7.0CAHM3_A/I pinout, SMCJ7.0CAHM3_A/I application, or SMCJ7.0CAHM3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, halogen-free RoHS compliance, thermal resistance (RθJA = 75 °C/W), and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ7.0CAHM3_A/I operates as a voltage-clamped surge protector using an avalanche breakdown mechanism, with symmetrical bidirectional conduction enabling protection against both positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance, while MSL Level 1 rating supports lead-free reflow up to 260 °C peak.
Designed for transient suppression per IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and ISO 7637-2 (automotive load dump), it delivers sub-nanosecond response time and maintains clamping performance across -55 °C to +150 °C operating junction temperature range - critical for under-hood automotive modules and industrial PLC I/O stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum continuous reverse working voltage before clamping initiates; defines safe operating margin below breakdown. |
| VBR (min/max) | 7.78 V / 8.60 V at 10 mA - Verified breakdown voltage range ensures reliable turn-on during surges without premature conduction. |
| VC @ IPPM | 12.0 V at 125 A - Clamping voltage limits downstream IC stress during 10/1000 µs transients; enables MOSFET gate or MCU I/O protection. |
| PPPM | 1500 W - Peak pulse power handling capacity determines survivability against high-energy spikes like inductive kickback. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance informs heatsinking requirements when operating near PD = 6.5 W limit. |
| TJ max. | +150 °C - Maximum junction temperature supports operation in high-ambient environments such as engine control units. |
| AEC-Q101 | Qualified - Confirmed reliability for automotive applications including ECU, body control modules, and ADAS sensor interfaces. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. Bidirectional construction means no polarity marking; terminals are symmetric and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode / Anode (bidirectional) | Surge current path | Both terminals conduct identically during positive or negative transients; no cathode band marking required. |
| Case / Body | Thermal interface | Exposed metal slug provides primary heat path to PCB copper; requires minimum 8.0 mm × 8.0 mm pad per terminal per datasheet fig. 2. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without external polarity management. |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and JEDEC J-STD-20 moisture sensitivity level 1 (MSL-1) for lead-free reflow. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a), improving protection margin for 3.3 V/5 V logic. |
| 1500 W peak pulse power | Supports protection of 12 V automotive systems against load-dump events up to ISO 16750-2 Category C5 (35 V, 400 ms). |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and microcontroller power inputs in door module ECUs exposed to battery line transients. IC Role / Device Role / Timing Role: Voltage-clamping TVS device placed between VCC and GND, responding within <1 ns to suppress ISO 7637-2 pulses. Use Value: Limits rail voltage to ≤12.0 V during 125 A surge, preventing latch-up or permanent damage to 5 V tolerant MCU IO cells. | Use Scenario: Safeguarding analog outputs of pressure sensors in factory automation systems subject to relay coil flyback. IC Role / Device Role / Timing Role: Bidirectional shunt protector across 4–20 mA loop terminals, clamping both polarity transients induced by inductive switching. Use Value: Maintains signal integrity by holding output voltage within ±12.0 V during 10/1000 µs surges, avoiding ADC saturation or op-amp rail-to-rail clipping. |
| Consumer USB Port ESD Protection | Telecom Line Card Surge Suppression |
Use Scenario: Secondary-level ESD protection on USB 2.0 VBUS and D+/D− lines in set-top boxes subjected to IEC 61000-4-2 ±8 kV contact discharge. IC Role / Device Role / Timing Role: Fast-response TVS array element providing low-capacitance clamping (CJ < 100 pF at 0 V) without signal distortion. Use Value: Clamps ESD events to <12.0 V within nanoseconds, preserving USB eye diagram integrity and meeting USB-IF compliance thresholds. | Use Scenario: Primary surge protection on Ethernet PHY power and data lines in VoIP gateway line cards exposed to lightning-induced surges. IC Role / Device Role / Timing Role: High-power bidirectional clamp installed at board edge, coordinated with GDT or MOV upstream for staged protection. Use Value: Absorbs up to 1500 W of surge energy per event, reducing let-through voltage to downstream isolation transformers and PHY ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.0CAHE3_A/I | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W) | Suitable only for lower-energy transients; not recommended for automotive load dump or industrial motor drive environments. | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2 ESD only. |
| SMCJ7.0AHE3_A/I | Unidirectional version; includes cathode band marking; identical VWM, VC, and PPPM ratings | Requires correct polarity orientation; unsuitable for AC or floating differential signals where bidirectional clamping is mandatory. | Choose only for DC-biased rails where polarity is fixed and reverse conduction must be blocked. |
Compared with SMAJ7.0CAHE3_A/I and SMCJ7.0AHE3_A/I, the SMCJ7.0CAHM3_A/I offers superior thermal performance (RθJA = 75 °C/W vs. 110 °C/W), halogen-free compliance, and guaranteed bidirectional symmetry - making it the preferred choice for AEC-Q101-requiring automotive and high-reliability industrial designs.
Availability
SMCJ7.0CAHM3_A/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, consumer USB power delivery systems, and telecom line card surge protection requiring stable component supply and full traceability.
Supply support for SMCJ7.0CAHM3_A/I 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, efficiency, and application-specific optimization.
The SMCJ series is part of Vishay's TRANSZORB® TVS platform engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and communications infrastructure where failure modes demand proven ruggedness and standardized qualification.
FAQ
What is the clamping voltage of the SMCJ7.0CAHM3_A/I at its rated peak pulse current?
The SMCJ7.0CAHM3_A/I has a maximum clamping voltage (VC) of 12.0 V when subjected to its rated peak pulse current (IPPM) of 125 A with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and verified under standard test conditions (TA = 25 °C, mounted on 8.0 mm × 8.0 mm copper pads). The SMCJ7.0CAHM3_A/I maintains this clamping performance across its full operating temperature range, ensuring predictable protection behavior in real-world automotive and industrial deployments.
Is the SMCJ7.0CAHM3_A/I suitable for automotive applications?
Yes, the SMCJ7.0CAHM3_A/I is AEC-Q101 qualified and specifically designed for automotive use cases including engine control units, body electronics, and ADAS sensor modules. Its halogen-free, RoHS-compliant construction (HM3 suffix), MSL Level 1 rating, and guaranteed operation from -55 °C to +150 °C junction temperature meet stringent automotive reliability requirements. The SMCJ7.0CAHM3_A/I is referenced in Vishay's automotive ordering codes and validated for ISO 7637-2 load dump and pulse immunity testing - confirming its suitability for under-hood and chassis-mounted systems.
How does the bidirectional configuration of the SMCJ7.0CAHM3_A/I affect circuit design?
The bidirectional configuration of the SMCJ7.0CAHM3_A/I eliminates polarity constraints during layout - both terminals are functionally identical, and no cathode band marking is present. This simplifies placement on AC-coupled lines, differential buses (e.g., CAN, RS-485), or floating sensor outputs where transient polarity is unpredictable. Unlike unidirectional variants such as SMCJ7.0AHE3_A/I, the SMCJ7.0CAHM3_A/I provides symmetrical clamping in either direction, removing risk of incorrect orientation and enabling single-part inventory consolidation across multiple signal types.
What is the thermal resistance and power derating behavior of the SMCJ7.0CAHM3_A/I?
The SMCJ7.0CAHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal. Its steady-state power dissipation (PD) is rated at 6.5 W at TA = 50 °C, and derating follows Figure 2 in the datasheet: above 25 °C ambient, power capability decreases linearly to zero at +150 °C junction temperature. The SMCJ7.0CAHM3_A/I's low RθJA enables effective passive cooling in compact automotive and industrial PCB layouts without additional heatsinking.
Does the SMCJ7.0CAHM3_A/I require special PCB layout considerations?
Yes - optimal performance of the SMCJ7.0CAHM3_A/I requires adherence to Vishay's recommended mounting pad layout: 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper areas per terminal, with minimal trace length between the device and protected node. This minimizes parasitic inductance that could elevate clamping voltage during fast transients. The SMCJ7.0CAHM3_A/I's SMC (DO-214AB) package also demands proper stencil aperture design for consistent solder paste deposition and void-free reflow. Failure to follow these guidelines may degrade the SMCJ7.0CAHM3_A/I's ability to clamp within its specified 12.0 V VC limit.
SMCJ7.0CAHM3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 125A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMC)
SMCJ7.0CAHM3_A/I FAQ
1.How can I place an order for SMCJ7.0CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ7.0CAHM3_A/I 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 SMCJ7.0CAHM3_A/I reliable?
The price and inventory of SMCJ7.0CAHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ7.0CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMCJ7.0CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ7.0CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ7.0CAHM3_A/I?
SMCJ7.0CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ7.0CAHM3_A/I 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 SMCJ7.0CAHM3_A/I?
For technical support, including SMCJ7.0CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ7.0CAHM3_A/I requirements.
6.How does Aetrix verify that SMCJ7.0CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ7.0CAHM3_A/I 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 SMCJ7.0CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMCJ7.0CAHM3_A/I?
All SMCJ7.0CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ7.0CAHM3_A/I, 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 SMCJ7.0CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMCJ7.0CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ7.0CAHM3_A/I Tags
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