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Vishay General Semiconductor - Diodes Division SMCJ7.5CA-E3/57T
- Part No.:
- SMCJ7.5CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ7.5CA-E3/57T.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:549
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Product details
Overview
SMCJ7.5CA-E3/57T 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), 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-E3/57T datasheet, SMCJ7.5CA-E3/57T pinout, SMCJ7.5CA-E3/57T application, or SMCJ7.5CA-E3/57T equivalent, key selection criteria include bidirectional clamping symmetry, low incremental surge resistance, MSL Level 1 reflow compatibility, AEC-Q101 qualification eligibility (via HE3 suffix), and UL 497B recognition for telecom and automotive surge protection compliance.
Technical Context
The SMCJ7.5CA-E3/57T operates as a silicon avalanche diode with symmetrical breakdown in both directions, enabling protection of AC-coupled or floating signal paths without polarity sensitivity. Its glass-passivated junction ensures stable VBR (8.33–9.21 V at 1.0 mA IT) and low temperature coefficient (0.067 %/°C), critical for thermal stability across -55 °C to +150 °C operating range.
It delivers fast response (<1 ps) to transients induced by inductive switching or ESD, clamping within nanoseconds while maintaining <100 μA reverse leakage at VWM. The device meets JESD201 Class 2 whisker resistance and is rated for 200 A IFSM (unidirectional only - not applicable here due to bidirectional configuration).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - maximum continuous reverse voltage before clamping begins; defines safe operating margin for 5 V–12 V systems. |
| VBR min/max | 8.33 V / 9.21 V at 1.0 mA - guaranteed symmetric breakdown threshold in both directions; ensures predictable turn-on under surge. |
| VC @ IPPM | 12.9 V at 116.3 A - clamped voltage during 10/1000 μs surge; limits stress on downstream ICs like CAN transceivers or ADC inputs. |
| PPPM | 1500 W - peak transient power handling capacity; supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) surge testing. |
| Package | SMC (DO-214AB) - surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal design; enables automated placement and 75 °C/W RθJA. |
| Compliance | UL 497B recognized (QVGQ2), RoHS-compliant (E3 suffix), MSL Level 1 (260 °C peak reflow); suitable for automotive and telecom production. |
Pinout & Package
SMCJ7.5CA-E3/57T uses the SMC (DO-214AB) package: a surface-mount, bidirectional device with no polarity marking - both terminals are electrically symmetrical. Thermal performance assumes mounting on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 2; no polarity - connects to either side of protected line (e.g., RS-485 A/B pair or Ethernet differential pair). |
| Terminal 2 | Anode/Cathode (bidirectional) | Matches Terminal 1; forms symmetrical clamp path - enables protection of AC signals or floating buses without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of differential or AC-coupled lines (e.g., CAN FD, USB D+/D−, Ethernet PHY) without external polarity management. |
| 1500 W peak pulse power | Withstands high-energy surges per IEC 61000-4-5 Ed.3, supporting industrial and automotive EMC compliance without derating. |
| Low clamping ratio (VC/VWM = 1.72) | Minimizes voltage overshoot during transients - critical for protecting 3.3 V or 5 V logic interfaces with tight VIH/VIL margins. |
| MSL Level 1 rating | Allows standard SMT reflow (peak 260 °C) without baking or special handling - reduces manufacturing cost and risk of moisture-induced failure. |
| UL 497B recognition | Validated for telecom and data line protector classification (file E136766), accelerating safety certification for connected devices. |
Applications
| Automotive Body Control Module (BCM) | Industrial RS-485 Field Bus |
|---|---|
Use Scenario: Protecting LIN/CAN signal lines in door modules against load dump and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential bus lines to clamp ±200 V spikes within 1 ns. Use Value: Prevents latch-up or gate oxide damage in transceivers (e.g., TJA1042) while maintaining signal integrity up to 1 Mbps. | Use Scenario: Shielding RS-485 transceivers (e.g., MAX1487) from EFT and surge events in factory automation networks. IC Role / Device Role / Timing Role: Symmetric clamp between A and B lines, referenced to ground via low-inductance layout. Use Value: Ensures >10,000 surge cycles without degradation, meeting IEC 61000-4-4 (4 kV) and IEC 61000-4-5 (2 kV) requirements. |
| Telecom DSL Line Interface | Consumer Smart Meter Power Input |
Use Scenario: Safeguarding ADSL2+ line drivers from lightning-induced surges on twisted-pair telephone lines. IC Role / Device Role / Timing Role: Primary protection stage before gas discharge tube (GDT) and secondary TVS cascade. Use Value: UL 497B listing enables direct use in certified DSL modems; clamps to <13 V before GDT fires, limiting pre-GDT stress. | Use Scenario: Overvoltage suppression on 24 V DC input of smart electricity meters exposed to grid switching transients. IC Role / Device Role / Timing Role: Standoff-rated TVS across input rail and chassis ground, coordinated with upstream fuse and MOV. Use Value: Withstands repeated 1500 W surges without parameter shift - validated for 10-year field life in utility-grade meters. |
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 | Same VWM (7.5 V) and VC (12.9 V), but lower PPPM (600 W); SOD-123FL package (smaller, higher RθJA). | Limited to low-energy surges (IEC 61000-4-2 only); unsuitable for IEC 61000-4-5 Level 3+. | Select when board space is constrained and surge threat level is limited to ESD or capacitive coupling. |
| 1.5KE7.5CA | Same electrical specs but DO-201AE axial package; higher RθJA (~100 °C/W), manual assembly only. | Not compatible with automated SMT lines; requires through-hole footprint and wave soldering. | Choose only for legacy repair, prototyping, or non-SMT environments where reflow compatibility is not required. |
Compared with SAC7.5CA and 1.5KE7.5CA, the SMCJ7.5CA-E3/57T uniquely combines 1500 W surge capability, SMT process compatibility, and UL 497B recognition - making it the preferred choice for volume automotive and industrial designs requiring production-ready surge resilience.
Availability
SMCJ7.5CA-E3/57T is available at Aetrix Electronics and suitable for automotive body control modules, industrial RS-485 networks, telecom DSL interfaces, and smart meter power inputs requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ7.5CA-E3/57T 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and AEC-Q qualification.
The SMCJ series was engineered specifically for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness, consistency, and safety certification are mandatory.
FAQ
What does the "CA" suffix mean in SMCJ7.5CA-E3/57T?
The "CA" suffix denotes a bidirectional configuration - meaning the SMCJ7.5CA-E3/57T provides symmetrical transient voltage suppression in both polarities. Unlike unidirectional variants (e.g., SMCJ7.5A), it has no cathode band marking and functions identically regardless of terminal orientation, making it ideal for differential signal lines such as CAN, RS-485, or Ethernet. This is confirmed in Vishay's datasheet section "DEVICES FOR BIDIRECTION APPLICATIONS".
Is SMCJ7.5CA-E3/57T AEC-Q101 qualified?
The SMCJ7.5CA-E3/57T itself is not AEC-Q101 qualified - the E3 suffix indicates RoHS-compliant commercial grade. However, Vishay offers AEC-Q101-qualified versions under the HE3 suffix (e.g., SMCJ7.5CAHE3_A/H). For automotive production, users must specify the HE3 variant; the E3/57T is intended for industrial and telecom applications where AEC-Q101 is not mandated.
What is the maximum clamping voltage of SMCJ7.5CA-E3/57T and how is it measured?
The maximum clamping voltage (VC) of SMCJ7.5CA-E3/57T is 12.9 V, measured at 116.3 A peak pulse current (IPPM) using a 10/1000 μs double-exponential surge waveform. This value is specified in the "ELECTRICAL CHARACTERISTICS" table of the Vishay datasheet (Document Number: 88394) and represents the worst-case voltage seen by protected circuitry during a standardized high-energy transient event.
Can SMCJ7.5CA-E3/57T be used in place of a unidirectional TVS like SMCJ7.5A?
No - SMCJ7.5CA-E3/57T is bidirectional and lacks polarity marking, while SMCJ7.5A is unidirectional with a cathode band. Substituting them requires verifying circuit topology: SMCJ7.5CA-E3/57T suits floating or AC-coupled lines (e.g., differential buses), whereas SMCJ7.5A is for DC rails referenced to ground. Using SMCJ7.5CA-E3/57T on a grounded DC line may allow reverse conduction during normal operation, risking malfunction.
What is the thermal resistance and recommended PCB layout for SMCJ7.5CA-E3/57T?
The SMCJ7.5CA-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as defined in the "MECHANICAL DATA" section. To achieve this, the PCB layout must use minimum recommended pad dimensions, avoid thermal reliefs on power traces, and ensure uninterrupted copper pour under the SMC body - critical for sustaining repetitive surge duty cycles without thermal runaway.
SMCJ7.5CA-E3/57T 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 (SMCJ)
SMCJ7.5CA-E3/57T FAQ
1.How can I place an order for SMCJ7.5CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ7.5CA-E3/57T 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-E3/57T reliable?
The price and inventory of SMCJ7.5CA-E3/57T 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-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ7.5CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ7.5CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ7.5CA-E3/57T?
SMCJ7.5CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ7.5CA-E3/57T 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-E3/57T?
For technical support, including SMCJ7.5CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ7.5CA-E3/57T requirements.
6.How does Aetrix verify that SMCJ7.5CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ7.5CA-E3/57T 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-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ7.5CA-E3/57T?
All SMCJ7.5CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ7.5CA-E3/57T, 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-E3/57T part is unused and in its original packaging.
Return procedure for SMCJ7.5CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ7.5CA-E3/57T Tags
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