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Vishay General Semiconductor - Diodes Division SMCJ7.5CA-M3/57T
- Part No.:
- SMCJ7.5CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ7.5CA-M3/57T.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,353
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Product details
Overview
SMCJ7.5CA-M3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients on signal or power lines. It features a 7.5 V stand-off voltage (VWM), 12.9 V maximum clamping voltage at 116.3 A peak pulse current (10/1000 μs), and 1500 W peak pulse power dissipation - optimized for protecting MOSFETs, ICs, and sensor interfaces in automotive and industrial systems.
For engineers reviewing the SMCJ7.5CA-M3/57T datasheet, SMCJ7.5CA-M3/57T pinout, SMCJ7.5CA-M3/57T application, or SMCJ7.5CA-M3/57T equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM = 1.72), halogen-free RoHS-compliant construction (M3 suffix), and AEC-Q101 qualification eligibility via HM3 variant.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional CA construction, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<100 μA at VWM), while the low incremental surge resistance supports fast energy absorption during ESD or lightning-induced surges.
The device complies with UL 497B for protector classification and meets J-STD-020 MSL Level 1 (260 °C peak reflow), making it suitable for high-reliability surface-mount assembly. Thermal resistance values (RθJA = 75 °C/W, RθJL = 15 °C/W) confirm effective heat dissipation when mounted on 8.0 mm × 8.0 mm copper pads per terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 8.33 V / 9.21 V at 1.0 mA - Confirmed breakdown threshold range under standardized test conditions |
| VC @ IPPM | 12.9 V at 116.3 A - Clamped voltage during 10/1000 μs surge, defining worst-case stress on protected circuitry |
| PPPM | 1500 W - Peak transient power handling capacity, critical for IEC 61000-4-5 surge immunity design |
| ID @ VWM | ≤100 μA - Low leakage ensures minimal standby power loss and signal integrity in high-impedance circuits |
| TJ max | +150 °C - Maximum junction temperature rating enables operation in under-hood automotive environments |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
Pinout & Package
SMCJ7.5CA-M3/57T uses the SMC (DO-214AB) package: a two-terminal, non-polarized surface-mount case with matte tin-plated leads solderable per J-STD-002. Bidirectional construction means no cathode/anode marking; terminals are functionally identical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Transient voltage input/output node | Connected across protected line pair (e.g., CAN_H/CAN_L, RS-485 A/B, or DC bus); conducts during overvoltage events in either polarity |
| Terminal 2 | Transient voltage input/output node | Second connection point completing bidirectional clamping path; no polarity dependency - interchangeable with Terminal 1 |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals or differential buses without external polarity management |
| 1500 W peak pulse power | Meets IEC 61000-4-5 Level 4 (4 kV surge) requirements when properly laid out with thermal pads |
| Halogen-free & RoHS-compliant (M3) | Complies with environmental regulations for automotive and industrial end equipment without compromising surge robustness |
| Low clamping ratio (VC/VWM = 1.72) | Minimizes voltage overshoot during transients, reducing risk of damage to downstream 3.3 V or 5 V logic |
| AEC-Q101 qualification path | HM3 variant available for automotive applications requiring validated reliability per stress-test standards |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting ABS wheel speed sensor outputs from load-dump and inductive switching transients in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Voltage clamping element placed directly at connector interface to limit transient excursions below IC input absolute maximum ratings. Use Value: Prevents latch-up or permanent damage to analog front-end amplifiers by limiting clamped voltage to 12.9 V during 100 A surge events. | Use Scenario: Safeguarding RS-485 transceivers in factory automation PLCs exposed to ground potential differences and motor drive noise. IC Role / Device Role / Timing Role: Bidirectional shunt protector across differential A/B lines, absorbing common-mode surges without disrupting data integrity. Use Value: Maintains signal fidelity during 1 kV/1.2 × 50 μs surges by clamping differential swing within ±13 V window, preserving receiver common-mode range. |
| Consumer Power Adapter Input | Telecom DSL Line Protection |
Use Scenario: Secondary-side overvoltage suppression on 5 V USB-C PD adapter outputs subject to feedback loop faults or capacitor failure. IC Role / Device Role / Timing Role: Fast-response crowbar device that diverts fault current away from downstream USB controller and port switch ICs. Use Value: Limits sustained overvoltage to ≤12.9 V for >100 ms, allowing system-level fault detection and graceful shutdown before thermal runaway. | Use Scenario: Primary protection stage on POTS/DSL line cards against lightning-induced longitudinal surges entering via telephone wiring. IC Role / Device Role / Timing Role: First-line bidirectional clamp before gas discharge tube (GDT) secondary stage, handling fast-rising edges up to 10 kV/μs. Use Value: Reduces let-through voltage to <15 V within 1 ns, preventing premature triggering of slower GDTs and minimizing signal distortion on ADSL2+ channels. |
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-E3/61 | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher VC (12.0 V @ 32.9 A) | Suitable only for lower-energy transients (IEC 61000-4-2 ESD, not full IEC 61000-4-5) | Select when board space is constrained and surge threat level is limited to ESD or low-energy switching noise. |
| 1.5KE7.5CA | Higher PPPM (1500 W), axial-leaded DO-15 package, higher leakage (500 μA @ VWM) | Requires through-hole mounting; less compatible with automated SMT lines and high-density PCBs | Choose for legacy designs or cost-sensitive applications where reflow compatibility is not required. |
Compared with SMAJ7.5CA-E3/61 and 1.5KE7.5CA, the SMCJ7.5CA-M3/57T delivers superior surge robustness in a compact, automated-assembly-ready SMC package with halogen-free compliance - making it optimal for new automotive and industrial designs demanding AEC-Q101 readiness and high-power transient immunity.
Availability
SMCJ7.5CA-M3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial communication ports, consumer power adapters, and telecom line cards requiring stable component supply and long-term production continuity.
Supply support for SMCJ7.5CA-M3/57T 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 is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments including automotive, industrial, and telecom infrastructure.
FAQ
What is the clamping voltage of SMCJ7.5CA-M3/57T under a standard 10/1000 μs surge?
The SMCJ7.5CA-M3/57T clamps to a maximum of 12.9 V when subjected to its rated peak pulse current of 116.3 A using the 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's datasheet revision 09-Jan-2024, Document Number 88394. The low clamping ratio (12.9 V / 7.5 V = 1.72) ensures effective protection of 5 V and 3.3 V logic circuits without overstressing downstream components.
Is SMCJ7.5CA-M3/57T suitable for automotive applications?
Yes - the SMCJ7.5CA-M3/57T is halogen-free and RoHS-compliant (M3 suffix), and belongs to the AEC-Q101-qualified SMCJ family. While the M3 variant itself is commercial-grade, the HM3 variant (e.g., SMCJ7.5CA-HM3/57T) is fully AEC-Q101 qualified. Engineers designing for automotive use should specify HM3 for qualification-critical applications; SMCJ7.5CA-M3/57T remains appropriate for non-qualification prototypes or cost-optimized modules where full AEC validation is deferred.
How does the bidirectional design of SMCJ7.5CA-M3/57T affect PCB layout?
The bidirectional nature of SMCJ7.5CA-M3/57T eliminates polarity constraints during placement - no cathode band marking exists, and terminals are interchangeable. This simplifies layout for differential interfaces like CAN, RS-485, or Ethernet PHYs, where symmetric protection is required. However, thermal pad design remains critical: Vishay specifies mounting on 8.0 mm × 8.0 mm copper pads per terminal to sustain 1500 W surge capability and maintain RθJA ≤ 75 °C/W.
What is the maximum leakage current of SMCJ7.5CA-M3/57T at its stand-off voltage?
At its 7.5 V stand-off voltage (VWM), the SMCJ7.5CA-M3/57T exhibits a maximum reverse leakage current (ID) of 100 μA at TA = 25 °C. This low leakage preserves signal integrity in high-impedance sensor circuits and minimizes quiescent power loss in battery-powered systems. Leakage increases with temperature but remains below 500 μA up to TJ = 125 °C per derating curves in the datasheet.
Can SMCJ7.5CA-M3/57T be used in place of a unidirectional TVS like SMCJ7.5A-M3/57T?
No - SMCJ7.5CA-M3/57T is strictly bidirectional and lacks polarity marking, whereas SMCJ7.5A-M3/57T is unidirectional with a defined cathode band. Substituting them requires verifying circuit topology: bidirectional use is mandatory for AC-coupled or floating lines (e.g., CAN, USB D+/D−), while unidirectional types suit DC-biased rails like 12 V power inputs. Using SMCJ7.5CA-M3/57T on a DC rail introduces unnecessary conduction during normal forward bias, risking overheating.
SMCJ7.5CA-M3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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-M3/57T FAQ
1.How can I place an order for SMCJ7.5CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ7.5CA-M3/57T 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-M3/57T reliable?
The price and inventory of SMCJ7.5CA-M3/57T 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-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ7.5CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ7.5CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ7.5CA-M3/57T?
SMCJ7.5CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ7.5CA-M3/57T 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-M3/57T?
For technical support, including SMCJ7.5CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ7.5CA-M3/57T requirements.
6.How does Aetrix verify that SMCJ7.5CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ7.5CA-M3/57T 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-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ7.5CA-M3/57T?
All SMCJ7.5CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ7.5CA-M3/57T, 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-M3/57T part is unused and in its original packaging.
Return procedure for SMCJ7.5CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ7.5CA-M3/57T Tags
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