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Vishay General Semiconductor - Diodes Division SMCJ7.0A-E3/9AT
- Part No.:
- SMCJ7.0A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ7.0A-E3/9AT.pdf
- Description:
- TVS DIODE 7VWM 12VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,164
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Product details
Overview
SMCJ7.0A-E3/9AT from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features a 7.0 V stand-off voltage (VWM), 7.78–8.60 V breakdown voltage (VBR) at 10 mA, 1500 W peak pulse power (PPPM), 125 A peak pulse current (IPPM), and clamps to ≤12.0 V at rated surge current.
For engineers reviewing the SMCJ7.0A-E3/9AT datasheet, SMCJ7.0A-E3/9AT pinout, SMCJ7.0A-E3/9AT application, or SMCJ7.0A-E3/9AT equivalent, this device is selected for robust overvoltage protection in automotive power rails, industrial sensor interfaces, and DC power supply inputs where fast response (<1 ns), low clamping voltage, and AEC-Q101 qualification (via HE3 variant) are critical design requirements.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 MΩ at 7.0 V), but switches to low-impedance conduction within picoseconds when reverse voltage exceeds VBR, diverting surge energy away from downstream circuitry. Its glass-passivated junction ensures stable leakage and long-term reliability under repeated transient stress.
The SMCJ7.0A-E3/9AT is rated for 1500 W peak pulse power with a 10/1000 μs waveform, derates linearly above 25 °C ambient (RθJA = 75 °C/W), and maintains <1000 μA reverse leakage at VWM - enabling use in low-power standby circuits without compromising battery life or signal integrity.
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–7 V DC rails. |
| VBR min/max | 7.78 V / 8.60 V at 10 mA - Confirmed breakdown range ensures predictable turn-on across production lots and temperature. |
| VC @ IPPM | ≤12.0 V at 125 A - Clamping voltage limits stress on protected ICs (e.g., microcontrollers, CAN transceivers) during ESD or surge events. |
| PPPM | 1500 W - Peak surge energy handling capability per 10/1000 μs waveform; supports IEC 61000-4-5 Level 4 compliance with proper PCB layout. |
| ID @ VWM | ≤200 μA - Low reverse leakage preserves efficiency in always-on circuits and avoids false triggering in high-impedance sensor nodes. |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and industrial enclosures without thermal derating penalties. |
| Package | SMC (DO-214AB) - Standardized 2-pin surface-mount outline with 8.0 mm × 8.0 mm copper pad requirement for thermal performance. |
Pinout & Package
Package: SMC (DO-214AB), 2-terminal surface-mount case with cathode band marking. Matte tin-plated leads, RoHS-compliant, J-STD-002 solderable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink node | Connected to protected line (e.g., VBUS, CAN_H); conducts during overvoltage to shunt energy to ground. |
| Anode | Reference/ground return | Typically tied to system ground plane; must be low-inductance path to handle 125 A transient currents without voltage overshoot. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMC package | Enables automated placement on dense PCBs while maintaining 1500 W surge rating - no through-hole compromise required. |
| Glass-passivated junction | Ensures stable VBR and leakage over 10+ years of field operation, even under thermal cycling and humidity exposure. |
| Very fast response time | <1 ns turn-on enables protection of high-speed interfaces (e.g., USB 2.0, RS-485) against ESD and fast-rising transients. |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles without pre-baking - reduces manufacturing complexity and cost. |
| AEC-Q101 qualified option | HE3 suffix variant meets automotive-grade reliability testing (HTOL, TCT, ESD), supporting under-hood and ADAS applications. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between VBAT and GND, clamping spikes up to 120 V for <100 ms. Use Value: Limits voltage seen by MCU power pins to ≤12.0 V, preventing latch-up or permanent damage during cold-crank or jump-start events. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to PLC I/O modules exposed to motor noise. IC Role / Device Role / Timing Role: Bidirectional or unidirectional clamp on signal lines, absorbing coupled transients from nearby VFDs or solenoids. Use Value: Maintains signal fidelity by suppressing >1 kV transients to <12.0 V within nanoseconds, avoiding ADC saturation or false readings. |
| DC Power Supply Input Protection | Telecom Line Interface Protection |
|
Use Scenario: Front-end surge suppression for 5 V/12 V wall adapters and PoE-powered devices. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input rail, coordinated with fuse and MOV for staged protection. Use Value: Absorbs 1500 W surges per IEC 61000-4-5, enabling Class II isolation compliance without oversized heatsinking. |
Use Scenario: Secondary protection on Ethernet PHY or DSL line drivers subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Fast-acting shunt element after gas discharge tube (GDT), limiting let-through voltage to PHY ICs. Use Value: Reduces clamping voltage from ~500 V (GDT alone) to ≤12.0 V, meeting IEEE 802.3af surge immunity 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 |
|---|---|---|---|
| SAC7.0 | Lower PPPM (600 W), same VWM (7.0 V), smaller SMA package (DO-214AC) | Not suitable for IEC 61000-4-5 Level 4; limited to consumer-grade surge events ≤600 W | Select SAC7.0 only for space-constrained, low-energy applications where 1500 W rating is unnecessary. |
| SMCJ7.0CA-E3/9AT | Bidirectional version; identical VWM (7.0 V), VBR (7.78–8.60 V), PPPM (1500 W), and package | Required for AC-coupled or differential signal lines (e.g., RS-485, CAN) where polarity reversal occurs | Choose SMCJ7.0CA-E3/9AT when protecting bidirectional buses; SMCJ7.0A-E3/9AT is optimal for DC power rails with defined polarity. |
Compared with SAC7.0, the SMCJ7.0A-E3/9AT delivers 2.5× higher surge energy handling in the same footprint class; versus SMCJ7.0CA-E3/9AT, it offers lower capacitance and tighter leakage control for unidirectional DC applications - making it the preferred choice for automotive power distribution and industrial SMPS inputs.
Availability
SMCJ7.0A-E3/9AT is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and telecom power supply designs requiring stable component supply, RoHS compliance, and traceable sourcing.
Supply support for SMCJ7.0A-E3/9AT 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, power efficiency, and automotive-grade qualification.
The SMCJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where failure modes must be mitigated without sacrificing response speed or thermal robustness.
FAQ
What is the maximum clamping voltage of the SMCJ7.0A-E3/9AT at its rated peak pulse current?
The SMCJ7.0A-E3/9AT clamps to a maximum of 12.0 V when subjected to its rated 125 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is guaranteed across temperature and production lot, ensuring consistent protection margins for downstream ICs such as microcontrollers and interface transceivers in the SMCJ7.0A-E3/9AT's target applications.
Is the SMCJ7.0A-E3/9AT RoHS-compliant and halogen-free?
Yes, the SMCJ7.0A-E3/9AT carries the "E3" suffix, indicating full RoHS compliance per EU Directive 2011/65/EU and exemption 7a. It is not halogen-free; for halogen-free compliance, the "M3" suffix variant (e.g., SMCJ7.0A-M3/9AT) must be specified. Both variants meet JESD 201 class 2 whisker resistance and UL 94 V-0 flammability standards.
Can the SMCJ7.0A-E3/9AT be used in bidirectional signal lines like RS-485?
No - the SMCJ7.0A-E3/9AT is unidirectional and must be installed with correct polarity (cathode toward the protected line). For bidirectional data lines, the SMCJ7.0CA-E3/9AT is the designated variant, offering identical electrical ratings but symmetrical breakdown in both directions. Using SMCJ7.0A-E3/9AT on AC-coupled signals risks forward conduction and failure.
What is the thermal resistance and how does it affect PCB layout for the SMCJ7.0A-E3/9AT?
The SMCJ7.0A-E3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on minimum recommended 8.0 mm × 8.0 mm copper pads per terminal. To sustain repetitive surges or elevated ambient temperatures, designers must allocate sufficient copper area and avoid thermal bottlenecks - undersized pads will cause junction temperature to exceed 150 °C, degrading clamping performance and lifetime reliability of the SMCJ7.0A-E3/9AT.
Does the SMCJ7.0A-E3/9AT meet AEC-Q101 qualification?
The base SMCJ7.0A-E3/9AT is commercial-grade and not AEC-Q101 qualified. However, Vishay offers the automotive-grade variant SMCJ7.0AHE3_A/I (with "HE3" suffix), which undergoes full AEC-Q101 stress testing including HTOL, TCT, and ESD. For automotive applications requiring qualification, specify the HE3 version - the SMCJ7.0A-E3/9AT remains suitable for industrial and telecom use where AEC-Q101 is not mandated.
SMCJ7.0A-E3/9AT 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:
- 1
- Bidirectional Channels:
- -
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ7.0A-E3/9AT FAQ
1.How can I place an order for SMCJ7.0A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ7.0A-E3/9AT 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 SMCJ7.0A-E3/9AT reliable?
The price and inventory of SMCJ7.0A-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ7.0A-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ7.0A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ7.0A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ7.0A-E3/9AT?
SMCJ7.0A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ7.0A-E3/9AT 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 SMCJ7.0A-E3/9AT?
For technical support, including SMCJ7.0A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ7.0A-E3/9AT requirements.
6.How does Aetrix verify that SMCJ7.0A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ7.0A-E3/9AT 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 SMCJ7.0A-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ7.0A-E3/9AT?
All SMCJ7.0A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ7.0A-E3/9AT, 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 SMCJ7.0A-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ7.0A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ7.0A-E3/9AT Tags
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