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Vishay General Semiconductor - Diodes Division SMCJ75CA-E3/57T
- Part No.:
- SMCJ75CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ75CA-E3/57T.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,635
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Product details
Overview
SMCJ75CA-E3/57T from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients up to 121 V at 12.4 A peak pulse current (10/1000 μs), with 75 V standoff voltage and 1500 W peak pulse power dissipation. It protects sensitive ICs and MOSFETs in automotive power supplies and industrial sensor interfaces.
For engineers reviewing the SMCJ75CA-E3/57T datasheet, SMCJ75CA-E3/57T pinout, SMCJ75CA-E3/57T application, or SMCJ75CA-E3/57T equivalent, key selection criteria include bidirectional clamping capability, 121 V max clamping voltage at rated surge current, -55 °C to +150 °C operating junction temperature, and RoHS-compliant matte tin-plated leads suitable for automated placement.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal lines without polarity constraints. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance under repetitive transient stress.
The device complies with AEC-Q101 qualification when ordered with HE3/HM3 suffixes, though SMCJ75CA-E3/57T is commercial-grade RoHS-compliant. Thermal resistance is specified at RθJA = 75 °C/W (typ.) on standard 8.0 mm × 8.0 mm copper pads, supporting reliable operation in high-temperature environments up to TJ = 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VWM) | 75 V - Maximum continuous reverse voltage before clamping begins; defines operating margin below breakdown. |
| Breakdown Voltage (VBR) | 83.3–92.1 V at 1 mA - Confirmed minimum/maximum threshold where avalanche conduction initiates reliably. |
| Clamping Voltage (VC) | 121 V at 12.4 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case surge event. |
| Peak Pulse Power (PPPM) | 1500 W - Surge energy handling capacity under standardized 10/1000 μs waveform; determines robustness against lightning or ESD-like transients. |
| Operating Temperature Range | -55 °C to +150 °C - Full specification compliance across automotive under-hood and industrial control environments. |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with J-STD-020 MSL Level 1 reflow. |
Pinout & Package
SMCJ75CA-E3/57T uses the SMC (DO-214AB) package: a two-terminal, non-polarized surface-mount case with no marking for bidirectional devices. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically; voltage clamping occurs regardless of polarity-no cathode band marking required. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines, differential buses (e.g., RS-485), or ungrounded sensor outputs without polarity concerns. |
| 1500 W peak pulse power | Withstands high-energy transients from inductive load switching (e.g., solenoid drivers) and ISO 7637-2 pulse 1/2a/5a in automotive systems. |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes overvoltage stress on downstream components-critical for 75 V-rated power rails protecting 100 V tolerant MOSFETs. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; simplifies SMT line integration and reduces manufacturing risk. |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Lines |
|---|---|
Use Scenario: Protection of 12 V/24 V battery-fed ECUs against load dump and alternator ripple transients per ISO 16750-2. IC Role / Device Role / Timing Role: Bidirectional TVS placed at power entry point to clamp surges before DC-DC converters and microcontrollers. Use Value: Limits transient voltage to ≤121 V, preserving integrity of 100 V input-rated buck controllers and preventing latch-up in 3.3 V logic domains. | Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loops) from ESD and field-induced noise in factory automation. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF typical) bidirectional clamp across signal and return paths near connector interface. Use Value: Maintains signal fidelity while suppressing ±15 kV contact ESD (IEC 61000-4-2) without distorting low-frequency analog waveforms. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Surge protection on POTS or DSL line cards exposed to lightning-induced longitudinal surges. IC Role / Device Role / Timing Role: Primary-level TVS in series with gas discharge tube (GDT) for coordinated two-stage protection. Use Value: Fast response (<1 ns) initiates clamping before GDT fires, limiting let-through voltage to telecom PHY ICs rated for ≤130 V abs max. | Use Scenario: Secondary-side overvoltage suppression in universal-input AC/DC adapters after rectification and bulk capacitance. IC Role / Device Role / Timing Role: Clamp across DC bus to protect primary-side controller ICs and optocoupler feedback circuits. Use Value: Absorbs 1500 W surge energy from capacitor discharge events, preventing destructive overvoltage on 80 V-rated gate drivers and error amplifiers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75CA-E3/52T | Lower peak pulse power (600 W), smaller SMB (DO-214AA) package, same VWM/VC ratings. | Not suitable for high-energy transients like automotive load dump; limited to consumer electronics with lower surge requirements. | Select when board space is constrained and surge threat level is ≤600 W (e.g., USB port protection). |
| SMCJ75A-E3/57T | Unidirectional version; identical VWM, VBR, VC, and PPPM, but requires correct polarity orientation. | Applicable only where circuit ground reference is fixed and reverse voltage cannot occur (e.g., DC power rail with known polarity). | Choose only if system architecture guarantees unidirectional stress and polarity alignment can be assured during layout. |
Compared with SMBJ75CA-E3/52T and SMCJ75A-E3/57T, the SMCJ75CA-E3/57T uniquely delivers 1500 W bidirectional clamping in the SMC footprint-making it the sole option for space-constrained, high-energy, polarity-agnostic protection in automotive and industrial power systems.
Availability
SMCJ75CA-E3/57T is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor signal conditioning, telecom line interface, and consumer power adapter input applications requiring stable component supply and full traceability.
Supply support for SMCJ75CA-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, rectifiers, MOSFETs, and protection devices with emphasis on reliability and automotive qualification.
The SMCJ series is engineered for high-power transient suppression in harsh environments, targeting design-in for automotive electronics, industrial controls, and infrastructure equipment where robustness and consistency are critical.
FAQ
What is the maximum clamping voltage of the SMCJ75CA-E3/57T under standard test conditions?
The SMCJ75CA-E3/57T has a maximum clamping voltage (VC) of 121 V when subjected to a 10/1000 μs waveform at 12.4 A peak pulse current. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's official datasheet revision 09-Jan-2024. The clamping performance ensures downstream components see no more than 121 V during surge events, making SMCJ75CA-E3/57T suitable for protecting 100 V-rated power stages.
Is the SMCJ75CA-E3/57T suitable for automotive applications?
The SMCJ75CA-E3/57T is RoHS-compliant and qualified to MSL Level 1, but it is not AEC-Q101 certified. For automotive use, Vishay offers the SMCJ75CAHE3 variant with AEC-Q101 qualification. Engineers must select SMCJ75CA-E3/57T only for non-safety-critical commercial or industrial applications; SMCJ75CA-E3/57T does not meet automotive qualification requirements unless explicitly validated by the end customer.
Does the SMCJ75CA-E3/57T have polarity markings on the package?
No, the SMCJ75CA-E3/57T has no polarity markings because it is a bidirectional TVS diode. Unlike unidirectional variants (e.g., SMCJ75A-E3/57T), which feature a cathode band, the SMCJ75CA-E3/57T functions identically in both directions and carries no visual polarity indicator. This simplifies PCB layout and eliminates orientation errors during automated assembly.
What is the thermal resistance of the SMCJ75CA-E3/57T, and how does it affect power derating?
The SMCJ75CA-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. This value directly governs power derating above 25 °C ambient: for example, at 70 °C ambient, the allowable continuous power drops to ~3.7 W. Derating curves in Figure 2 of the Vishay datasheet document this relationship for precise thermal design of SMCJ75CA-E3/57T installations.
Can the SMCJ75CA-E3/57T replace the SMCJ75A-E3/57T in an existing design?
The SMCJ75CA-E3/57T can replace the unidirectional SMCJ75A-E3/57T only if the circuit experiences bidirectional transients or lacks a defined polarity reference. Since SMCJ75CA-E3/57T has identical electrical ratings (VWM, VBR, VC, PPPM) but no polarity constraint, it adds design flexibility-but requires verification that reverse leakage and clamping symmetry meet system requirements. No PCB changes are needed due to identical SMC (DO-214AB) packaging.
SMCJ75CA-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):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 121V
- Current - Peak Pulse (10/1000µs):
- 12.4A
- 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)
SMCJ75CA-E3/57T FAQ
1.How can I place an order for SMCJ75CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ75CA-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 SMCJ75CA-E3/57T reliable?
The price and inventory of SMCJ75CA-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 SMCJ75CA-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ75CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ75CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ75CA-E3/57T?
SMCJ75CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ75CA-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 SMCJ75CA-E3/57T?
For technical support, including SMCJ75CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ75CA-E3/57T requirements.
6.How does Aetrix verify that SMCJ75CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ75CA-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 SMCJ75CA-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ75CA-E3/57T?
All SMCJ75CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ75CA-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 SMCJ75CA-E3/57T part is unused and in its original packaging.
Return procedure for SMCJ75CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ75CA-E3/57T Tags
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