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Vishay General Semiconductor - Diodes Division SMCJ7.5CA-M3/9AT
- Part No.:
- SMCJ7.5CA-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ7.5CA-M3/9AT.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,957
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Product details
Overview
SMCJ7.5CA-M3/9AT 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 7.5 V stand-off voltage (VWM), 8.33–9.21 V breakdown voltage (VBR) at 1 mA, 12.9 V maximum clamping voltage (VC) at 116.3 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed on power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMCJ7.5CA-M3/9AT datasheet, SMCJ7.5CA-M3/9AT pinout, SMCJ7.5CA-M3/9AT application, or SMCJ7.5CA-M3/9AT equivalent, key selection criteria include bidirectional clamping capability, halogen-free RoHS-compliant construction (M3 suffix), AEC-Q101 qualification eligibility, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads per terminal.
Technical Context
This device operates as a voltage-clamped surge protector using an avalanche junction structure, responding in sub-nanosecond time to transients induced by inductive load switching or ESD events. Its bidirectional symmetry ensures identical clamping behavior in both polarities, eliminating need for polarity-aware layout in AC-coupled or differential signal paths.
Thermal design relies on low RθJL (15 °C/W) and moderate RθJA (75 °C/W), enabling reliable operation up to TJ = +150 °C when mounted per recommended pad layout. The glass-passivated chip junction and matte tin-plated leads meet J-STD-002 solderability and JESD22-B102 whisker resistance Class 2 requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 8.33 V / 9.21 V at IT = 1.0 mA - Ensures consistent breakdown threshold across production lot |
| VC @ IPPM | 12.9 V at 116.3 A - Limits protected circuit voltage during worst-case 10/1000 µs surge |
| PPPM | 1500 W - Withstands high-energy transients common in automotive load-dump and ISO 7637-2 tests |
| ID @ VWM | 100 µA - Low leakage preserves signal integrity and battery life in always-on systems |
| TJ max | +150 °C - Supports under-hood automotive deployment without derating below ambient 125 °C |
| Package | SMC (DO-214AB) - Standardized surface-mount outline compatible with industry reflow profiles |
Pinout & Package
SMCJ7.5CA-M3/9AT uses the SMC (DO-214AB) package: a rectangular, low-profile, surface-mount case with two coplanar terminals. No polarity marking is present on bidirectional variants; both terminals are functionally symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | Accepts surge current during positive voltage excursion; electrically identical to cathode in bidirectional mode |
| Cathode | Transient current entry (negative half-cycle) | Accepts surge current during negative voltage excursion; electrically identical to anode in bidirectional mode |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., CAN, RS-485), and ungrounded power domains without polarity constraints |
| Halogen-free, RoHS-compliant (M3) | Meets environmental compliance mandates for automotive and industrial OEMs while maintaining thermal and mechanical reliability |
| 1500 W peak pulse power | Provides margin against high-energy transients including ISO 16750-2 load dump pulses in 12 V vehicle systems |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow without moisture sensitivity concerns or baking requirements |
| AEC-Q101 qualification path | Base P/NHM3_X variant available for automotive applications requiring stress-tested reliability validation |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting microcontroller I/O and power inputs in engine control units exposed to ISO 7637-2 Pulse 5a (load dump) and Pulse 1/2b (switching transients). IC Role / Device Role / Timing Role: Voltage-clamping TVS placed directly at connector entry point or IC supply pin to shunt surge energy to ground before it reaches silicon. Use Value: Clamps 12 V system surges to ≤12.9 V, preventing latch-up or gate oxide damage in 3.3 V/5 V logic devices downstream. | Use Scenario: Safeguarding analog outputs and digital communication lines (e.g., 4–20 mA loop, RS-485) in factory-floor pressure/temperature sensors. IC Role / Device Role / Timing Role: Bidirectional transient suppressor bridging signal line to ground, absorbing ESD (IEC 61000-4-2) and inductive kickback from nearby solenoids. Use Value: Maintains signal fidelity with <100 µA leakage at 7.5 V, while clamping ±1 kV ESD events within nanoseconds to preserve ADC accuracy and UART timing. |
| Consumer Device USB Port Protection | Telecom DSL Line Interface Protection |
Use Scenario: Hardening USB 2.0 data lines (D+/D−) and VBUS against hot-plug transients and human-body-model ESD in set-top boxes and docking stations. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed adjacent to connector, minimizing stub length to preserve 480 Mbps signal integrity. Use Value: Delivers 12.9 V clamping with no polarity marking required - simplifying layout and reducing BOM count versus dual-unidirectional solutions. | Use Scenario: Protecting ADSL/VDSL line drivers and receivers from lightning-induced surges and AC power cross-talk on twisted-pair telephone lines. IC Role / Device Role / Timing Role: Primary surge suppression stage in hybrid coupler interface, rated for repeated 10/1000 µs surges up to 1500 W. Use Value: Withstands >1000 surges at rated PPPM without parameter shift, ensuring long-term reliability in outdoor telecom cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.5CA-E3/61T | Lower PPPM (400 W), SMA package (smaller footprint, higher RθJA) | Suitable only for low-energy transients (e.g., HBM ESD); not rated for load dump | Select when board space is constrained and surge energy is limited to <400 W |
| 1.5KE7.5CA | Through-hole DO-201 package, same VWM/VC but higher parasitic inductance | Not suitable for high-speed signal lines due to longer lead inductance; preferred for bulk power rail protection | Choose for legacy through-hole designs or where manual assembly is required |
Compared with SMAJ7.5CA-E3/61T and 1.5KE7.5CA, the SMCJ7.5CA-M3/9AT delivers 3.75× higher surge power handling in a surface-mount package with lower thermal resistance and halogen-free compliance - making it optimal for next-generation automotive and industrial SMT platforms requiring robust, scalable protection.
Availability
SMCJ7.5CA-M3/9AT is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor modules, and telecom line interface cards requiring stable component supply and full traceability.
Supply support for SMCJ7.5CA-M3/9AT 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, 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 specifically for high-power transient suppression in harsh environments - targeting automotive, industrial, and communications infrastructure where failure is not an option.
FAQ
What does the "CA" suffix indicate in SMCJ7.5CA-M3/9AT?
The "CA" suffix denotes a bidirectional configuration: the SMCJ7.5CA-M3/9AT provides symmetrical clamping for both positive and negative voltage transients, with identical electrical characteristics in either polarity. This eliminates polarity marking on the device and simplifies PCB layout for AC-coupled or floating signal paths - unlike unidirectional "A" variants which require correct cathode orientation. The SMCJ7.5CA-M3/9AT is fully specified for bidirectional use per Vishay Document 88394.
Is SMCJ7.5CA-M3/9AT qualified for automotive applications?
The base SMCJ7.5CA-M3/9AT is halogen-free and RoHS-compliant, but AEC-Q101 qualification requires the HM3_X variant (e.g., SMCJ7.5CAHM3_A/I). While the SMCJ7.5CA-M3/9AT shares identical die and construction, only HM3-suffixed parts undergo the full AEC-Q101 stress test sequence. For automotive-grade deployment, specify the HM3 ordering code and confirm qualification status via Vishay's official product change notices.
What is the maximum clamping voltage of SMCJ7.5CA-M3/9AT under surge conditions?
The SMCJ7.5CA-M3/9AT has a maximum clamping voltage (VC) of 12.9 V when subjected to its rated peak pulse current (IPPM) of 116.3 A using the standardized 10/1000 µs waveform. This value is measured at the device terminals under specified test conditions (TA = 25 °C, mounted on 8.0 mm × 8.0 mm copper pads), and represents the upper limit of voltage seen by downstream circuitry during worst-case transient events.
How does the M3 suffix affect the SMCJ7.5CA-M3/9AT's compliance and performance?
"M3" indicates halogen-free, RoHS-compliant construction with matte tin-plated leads meeting J-STD-002 solderability and JESD22-B102 whisker resistance Class 2. It does not alter electrical parameters versus E3-suffixed parts, but ensures compliance with EU RoHS Directive 2011/65/EU Annex II exemptions and automotive material restrictions. The SMCJ7.5CA-M3/9AT maintains identical VWM, VBR, VC, and PPPM ratings as its E3 counterpart.
Can SMCJ7.5CA-M3/9AT be used in place of a unidirectional TVS like SMCJ7.5A-M3/9AT?
No - the SMCJ7.5CA-M3/9AT is bidirectional and lacks polarity marking, while SMCJ7.5A-M3/9AT is unidirectional with a cathode band. Substituting them requires verifying circuit topology: bidirectional use is mandatory for AC signals or floating grounds, whereas unidirectional parts are required for DC power rails where reverse conduction must be blocked. Using SMCJ7.5CA-M3/9AT in a unidirectional-only design may allow unintended reverse leakage paths.
SMCJ7.5CA-M3/9AT 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 116.3A
- 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 (SMC)
SMCJ7.5CA-M3/9AT FAQ
1.How can I place an order for SMCJ7.5CA-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ7.5CA-M3/9AT 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 SMCJ7.5CA-M3/9AT reliable?
The price and inventory of SMCJ7.5CA-M3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ7.5CA-M3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ7.5CA-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ7.5CA-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ7.5CA-M3/9AT?
SMCJ7.5CA-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ7.5CA-M3/9AT 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 SMCJ7.5CA-M3/9AT?
For technical support, including SMCJ7.5CA-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ7.5CA-M3/9AT requirements.
6.How does Aetrix verify that SMCJ7.5CA-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ7.5CA-M3/9AT 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 SMCJ7.5CA-M3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ7.5CA-M3/9AT?
All SMCJ7.5CA-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ7.5CA-M3/9AT, 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 SMCJ7.5CA-M3/9AT part is unused and in its original packaging.
Return procedure for SMCJ7.5CA-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ7.5CA-M3/9AT Tags
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Diodes Incorporated
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