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Vishay General Semiconductor - Diodes Division SMCJ7.5CA/57T
- Part No.:
- SMCJ7.5CA/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ7.5CA/57T.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,045
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Product details
Overview
SMCJ7.5CA/57T from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for robust overvoltage protection on signal and power lines. It features a 7.5 V stand-off voltage (VWM), 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 - ideal for automotive sensor interface and industrial I/O line protection.
For engineers reviewing the SMCJ7.5CA/57T datasheet, SMCJ7.5CA/57T pinout, SMCJ7.5CA/57T application, or SMCJ7.5CA/57T equivalent, key selection criteria include bi-directional clamping capability, AEC-Q101 qualification, low incremental surge resistance, UL 94 V-0 molding compound, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ7.5CA/57T operates as a silicon avalanche diode with symmetrical breakdown behavior in both polarities, enabling protection of AC-coupled or floating signal paths without polarity constraints. Its glass-passivated junction ensures stable VBR (8.33–9.21 V at 1.0 mA IT) and low leakage (<100 µA at VWM).
Thermal performance is defined by RθJA = 75 °C/W and RθJL = 15 °C/W, supporting reliable operation up to TJ = +150 °C. The device meets MSL level 1 per J-STD-020 with 260 °C peak reflow profile and is qualified to AEC-Q101 for automotive under-hood applications.
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 1.0 mA - guaranteed breakdown range defining turn-on threshold |
| VC @ IPPM | 12.9 V at 116.3 A - clamped voltage during 10/1000 µs surge, limiting downstream stress |
| PPPM | 1500 W - peak transient power handling capacity under standardized surge waveform |
| ID @ VWM | <100 µA - ultra-low leakage preserves signal integrity in high-impedance circuits |
| TJ max | +150 °C - extended junction temperature rating supports under-hood and industrial environments |
| Package | DO-214AB (SMCJ) - surface-mount outline with 0.320" body length and J-bend leads for automated assembly |
Pinout & Package
DO-214AB (SMCJ) package: molded plastic case with two J-bend terminals; no polarity marking for bi-directional devices; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional avalanche junction | No functional distinction between terminals - identical clamping in either direction |
| Lead 1 / Lead 2 | Current path input/output | Both terminals conduct surge current equally; PCB layout requires equal thermal pad area (8.0 mm × 8.0 mm) on each side |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing |
| UL 94 V-0 molding compound | Flame-retardant encapsulation meeting safety standards for enclosed electronic systems |
| MSL Level 1 moisture sensitivity | Unlimited floor life at ≤30 °C/60% RH - no baking required prior to reflow |
| Low incremental surge resistance | Enables tighter VC/VBR ratio (12.9 V / 8.33 V ≈ 1.55), improving protection margin over competing TVS devices |
| Glass passivated junction | Stable electrical parameters across lifetime and environmental stress, minimizing parameter drift |
Applications
| Automotive Sensor Interface | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN transceiver inputs and analog sensor lines (e.g., pressure, temperature) from load dump and ESD events in engine control units. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed directly at connector entry point to shunt transients before reaching sensitive analog front-ends. Use Value: Clamps 10/1000 µs surges to ≤12.9 V while maintaining <100 µA leakage - preserving ADC reference accuracy and avoiding false triggers. | Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to inductive switching noise from solenoids and contactors. IC Role / Device Role / Timing Role: Standoff-rated TVS on 24 V DC input lines, absorbing repetitive 1500 W surges without degradation. Use Value: Withstands ≥1000 surges at rated PPPM and maintains VWM stability over temperature (−55 °C to +150 °C), ensuring long-term field reliability. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Shielding RS-485 transceivers and Ethernet PHYs from lightning-induced surges on outdoor data lines. IC Role / Device Role / Timing Role: Primary protection device upstream of GDT or polymer PTC, providing fast-response clamping before secondary protectors activate. Use Value: Sub-nanosecond response time limits let-through energy to <10 mJ, preventing latch-up in 3.3 V or 5 V transceivers. | Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals to clamp inductive kickback during MOSFET switching. Use Value: 1500 W PPPM rating handles repeated 8.3 ms half-sine surges up to 200 A (IFSM-equivalent), eliminating need for derating in cyclic duty. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC7.5CA | Lower PPPM (600 W), smaller DO-214AC (SMA) package, higher VC (13.3 V at 50 A) | Not suitable for 1500 W surge requirements; limited to low-energy signal-line protection | Select only when board space is constrained and surge energy is ≤600 W |
| 1.5KE7.5CA | Through-hole DO-15 package, same VWM/VC specs, but lower thermal mass and RθJA = 15 °C/W | Requires manual or wave soldering; unsuitable for high-volume SMT production | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SAC7.5CA and 1.5KE7.5CA, the SMCJ7.5CA/57T delivers superior surge handling (1500 W vs. 600 W or 1500 W with inferior thermal dissipation), full AEC-Q101 compliance, and optimized SMT manufacturability - making it the preferred choice for automotive and industrial surface-mount systems requiring repeatable, high-energy transient immunity.
Availability
SMCJ7.5CA/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply, AEC-Q101 traceability, and RoHS-compliant packaging.
Supply support for SMCJ7.5CA/57T 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 was engineered for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where AEC-Q101 qualification, UL recognition, and consistent clamping performance are mandatory.
FAQ
What is the clamping voltage of the SMCJ7.5CA/57T under a 10/1000 µs surge?
The SMCJ7.5CA/57T clamps to a maximum of 12.9 V when subjected to its rated peak pulse current of 116.3 A using the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's datasheet revision 11-Dec-12, ensuring predictable overvoltage limiting for downstream ICs such as microcontrollers and transceivers.
Is the SMCJ7.5CA/57T suitable for automotive applications?
Yes, the SMCJ7.5CA/57T is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. Its −55 °C to +150 °C operating junction temperature range, MSL Level 1 reflow compatibility, and UL 94 V-0 flammability rating meet critical automotive system requirements - making SMCJ7.5CA/57T appropriate for ECUs, ADAS sensors, and body control modules.
Does the SMCJ7.5CA/57T have polarity markings on the package?
No, the SMCJ7.5CA/57T is a bi-directional TVS diode and carries no polarity marking on the DO-214AB (SMCJ) case. Unlike uni-directional variants (e.g., SMCJ7.5A), the CA suffix indicates symmetrical breakdown behavior - both terminals function identically, simplifying PCB layout and eliminating orientation errors during automated placement.
What is the maximum leakage current of the SMCJ7.5CA/57T at its stand-off voltage?
The SMCJ7.5CA/57T exhibits a maximum reverse leakage current (ID) of 100 µA when biased at its 7.5 V stand-off voltage (VWM), measured at TA = 25 °C. This low leakage preserves signal integrity in high-impedance sensor interfaces and ensures minimal power loss in always-on monitoring circuits - a key advantage over higher-leakage alternatives.
Can the SMCJ7.5CA/57T be used in place of the SMCJ7.5A in a new design?
No - the SMCJ7.5CA/57T and SMCJ7.5A are not interchangeable without circuit review. While both share VWM = 7.5 V and DO-214AB packaging, the SMCJ7.5A is uni-directional (cathode-banded) and conducts forward current, whereas the SMCJ7.5CA/57T is bi-directional with symmetrical clamping. Using SMCJ7.5CA/57T in a DC-biased line may cause unintended conduction; verify topology before substitution.
SMCJ7.5CA/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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 (SMCJ)
SMCJ7.5CA/57T FAQ
1.How can I place an order for SMCJ7.5CA/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ7.5CA/57T 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/57T reliable?
The price and inventory of SMCJ7.5CA/57T 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/57T is usually 5 days.
3.What payment methods are accepted for SMCJ7.5CA/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ7.5CA/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ7.5CA/57T?
SMCJ7.5CA/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ7.5CA/57T 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/57T?
For technical support, including SMCJ7.5CA/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ7.5CA/57T requirements.
6.How does Aetrix verify that SMCJ7.5CA/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ7.5CA/57T 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/57T meets industry standards.
7.What is the process for return or replacement of SMCJ7.5CA/57T?
All SMCJ7.5CA/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ7.5CA/57T, 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/57T part is unused and in its original packaging.
Return procedure for SMCJ7.5CA/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ7.5CA/57T Tags
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