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Vishay General Semiconductor - Diodes Division SMCJ75CA/57T
- Part No.:
- SMCJ75CA/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ75CA/57T.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,019
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Product details
Overview
SMCJ75CA/57T from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for clamping voltage transients on power and signal lines. It features a 75 V stand-off voltage (VWM), 121 V maximum clamping voltage (VC) at 12.4 A peak pulse current (IPPM), and 1500 W peak pulse power dissipation (PPPM) with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the SMCJ75CA/57T datasheet, SMCJ75CA/57T pinout, SMCJ75CA/57T application, or SMCJ75CA/57T equivalent, this device is selected for high-energy surge immunity in DC bus protection, ESD-hardened sensor front-ends, and AEC-Q101-compliant 12 V/24 V vehicle subsystems where low clamping voltage and bi-directional symmetry are critical.
Technical Context
The SMCJ75CA/57T operates as a bi-directional avalanche diode, exhibiting symmetrical breakdown behavior in both polarities with identical VBR min/max (83.3 V / 92.1 V) and VC (121 V). Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and robust surge handling under repetitive 10/1000 µs transients.
Thermal performance is defined by RθJA = 75 °C/W and RθJL = 15 °C/W, supporting operation up to TJ = +150 °C. The device meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 - confirming suitability for under-hood automotive environments without derating below 125 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before clamping begins; sets upper limit for normal circuit operation. |
| VBR (min/max) | 83.3 V / 92.1 V - Breakdown occurs within this range at 1 mA test current; defines turn-on threshold tolerance. |
| VC @ IPPM | 121 V at 12.4 A - Clamped voltage during 10/1000 µs surge; determines worst-case overvoltage seen by protected IC. |
| PPPM | 1500 W - Peak transient energy absorption capability; enables protection against IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | <1.0 µA - Reverse leakage at rated stand-off voltage; ensures minimal power loss and signal integrity in high-impedance circuits. |
| TJ max. | +150 °C - Maximum junction temperature; supports placement near hot components in engine control units and power converters. |
| Package | DO-214AB (SMCJ) - Surface-mount, low-profile case with 8.0 mm × 8.0 mm copper pad requirement; optimized for automated assembly and thermal relief. |
Pinout & Package
SMCJ75CA/57T uses the DO-214AB (SMCJ) package: a bi-directional device with no polarity marking; both terminals are electrically symmetrical and interchangeable. Mounting requires 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal for rated PPPM performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; clamps positive or negative transients equally - no orientation required during placement. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Identical VBR and VC in both directions - eliminates need for polarity-aware layout in AC-coupled or floating signal lines. |
| AEC-Q101 qualification | Validated for automotive under-hood use including temperature cycling, humidity bias, and mechanical shock - no additional qualification needed for Tier 1 designs. |
| Low incremental surge resistance | Enables tight VC specification (121 V) at 12.4 A - reduces stress on downstream MOSFET gate oxides and logic inputs during lightning-induced surges. |
| MSL Level 1 rating | Compatible with standard SMT reflow profiles up to 260 °C peak - supports high-volume manufacturing without moisture sensitivity concerns. |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage under thermal aging and humidity exposure - critical for 15-year automotive service life. |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V supply rails in body control modules against load dump and alternator transients. IC Role / Device Role / Timing Role: Primary clamping element placed upstream of DC-DC converters and microcontrollers. Use Value: Limits rail overvoltage to ≤121 V during ISO 7637-2 Pulse 5a (load dump), preventing latch-up or burnout of 3.3 V/5 V logic. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors connected to PLC analog input cards. IC Role / Device Role / Timing Role: Bi-directional TVS across differential signal pair (e.g., 4–20 mA loop) and ground. Use Value: Suppresses EFT bursts (IEC 61000-4-4) and surge coupling without distorting low-level analog signals due to sub-µA leakage. |
| Telecom DC Power Feeds | Consumer Appliance Motor Drive Inputs |
Use Scenario: Safeguarding PoE-powered equipment (e.g., IP cameras) from induced surges on 48 V DC feed lines. IC Role / Device Role / Timing Role: Standoff-clamp TVS on primary side of isolated DC-DC converter. Use Value: Withstands repeated 1500 W surges while maintaining 75 V hold-off - avoids false triggering during normal line fluctuations. |
Use Scenario: Protecting H-bridge gate drivers in washing machine motor controllers from back-EMF spikes. IC Role / Device Role / Timing Role: Clamp across VDD and GND pins of half-bridge driver ICs. Use Value: Fast response (<1 ps) and low clamping voltage prevent shoot-through failure caused by transient-induced logic upset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75CA | Lower PPPM (600 W), smaller SMB package (DO-214AA), higher RθJA (110 °C/W). | Suitable only for lower-energy transients (e.g., IEC 61000-4-2 ESD); not rated for ISO 7637-2 Pulse 5a. | Select SMBJ75CA only when board space is constrained and surge threat level is limited to ESD or low-energy switching noise. |
| 1.5KE75CA | Through-hole TO-218 package, same 75 V VWM and 121 V VC, but higher thermal mass and slower mounting. | Used in legacy industrial panels where manual assembly or high-reliability through-hole mounting is mandated. | Choose 1.5KE75CA when replacing legacy designs or when PCB layout prohibits surface-mount devices near high-current traces. |
Compared with SMBJ75CA and 1.5KE75CA, the SMCJ75CA/57T delivers optimal balance of high surge capacity (1500 W), AEC-Q101 compliance, and SMT manufacturability - making it the preferred choice for new automotive and industrial designs requiring robust, automated production-ready protection.
Availability
SMCJ75CA/57T is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, telecom DC power feeds, and consumer appliance motor drive inputs requiring stable component supply and full traceability.
Supply support for SMCJ75CA/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, and protection devices with emphasis on reliability, automotive qualification, and high-power handling.
The SMCJ series was developed specifically for high-energy transient suppression in harsh environments - targeting AEC-Q101-compliant automotive electronics and industrial systems demanding >1000 W surge immunity.
FAQ
What is the clamping voltage of SMCJ75CA/57T under a standard 10/1000 µs surge?
The SMCJ75CA/57T clamps to a maximum of 121 V when subjected to its rated peak pulse current of 12.4 A using the standardized 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and forms the basis for system-level overvoltage margin calculations in designs using the SMCJ75CA/57T.
Is SMCJ75CA/57T suitable for automotive applications?
Yes, the SMCJ75CA/57T is AEC-Q101 qualified and rated for operation from –55 °C to +150 °C junction temperature. Its DO-214AB package, MSL Level 1 rating, and validated performance under load dump and EFT conditions make it appropriate for engine control units, body electronics, and ADAS power domains where the SMCJ75CA/57T is deployed.
How does the bi-directional nature of SMCJ75CA/57T affect PCB layout?
The SMCJ75CA/57T has no polarity marking and identical electrical characteristics in both directions, so PCB layout requires no orientation check during placement. This simplifies routing on differential lines, AC-coupled interfaces, or floating grounds - unlike uni-directional variants such as SMCJ75A, where cathode alignment is mandatory for correct operation.
What is the maximum steady-state power dissipation of SMCJ75CA/57T?
The SMCJ75CA/57T has a maximum steady-state power dissipation (PD) of 6.5 W when mounted on an infinite heatsink at TA = 50 °C. In typical PCB layouts with 8.0 mm × 8.0 mm copper pads per terminal, derating applies above 25 °C ambient - ensuring safe operation of the SMCJ75CA/57T in enclosed enclosures up to +85 °C ambient.
Does SMCJ75CA/57T meet RoHS and halogen-free requirements?
Yes, the SMCJ75CA/57T carries the "E3" suffix indicating RoHS compliance per Directive 2011/65/EU and halogen-free status per JEDEC JS709A. The matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards, confirming full environmental compliance for the SMCJ75CA/57T in global production.
SMCJ75CA/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):
- 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/57T FAQ
1.How can I place an order for SMCJ75CA/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ75CA/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/57T reliable?
The price and inventory of SMCJ75CA/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/57T is usually 5 days.
3.What payment methods are accepted for SMCJ75CA/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ75CA/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ75CA/57T?
SMCJ75CA/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ75CA/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/57T?
For technical support, including SMCJ75CA/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ75CA/57T requirements.
6.How does Aetrix verify that SMCJ75CA/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ75CA/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/57T meets industry standards.
7.What is the process for return or replacement of SMCJ75CA/57T?
All SMCJ75CA/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ75CA/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/57T part is unused and in its original packaging.
Return procedure for SMCJ75CA/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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