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Vishay General Semiconductor - Diodes Division SMCJ75CA-E3/9AT
- Part No.:
- SMCJ75CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ75CA-E3/9AT.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,342
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Product details
Overview
SMCJ75CA-E3/9AT from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 75 V standoff voltage, 1500 W peak pulse power rating, and 121 V maximum clamping voltage at 12.4 A peak pulse current. It protects sensitive ICs, MOSFETs, and sensor signal lines in automotive, industrial, and telecom systems against inductive switching transients and lightning-induced surges.
For engineers reviewing the SMCJ75CA-E3/9AT datasheet, SMCJ75CA-E3/9AT pinout, SMCJ75CA-E3/9AT application, or SMCJ75CA-E3/9AT equivalent, key selection criteria include bidirectional clamping symmetry, 121 V VC under 10/1000 μs surge, -55 °C to +150 °C operating junction temperature, RoHS-compliant matte tin terminations, and compatibility with automated SMT placement on standard 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ75CA-E3/9AT operates as a voltage-clamping device that remains non-conductive below its 75 V standoff voltage (VWM), then rapidly transitions to low-impedance conduction above its 83.3–92.1 V breakdown range (VBR) to divert transient energy. Its bidirectional architecture ensures symmetrical clamping in both polarities without polarity marking.
It delivers 1500 W peak pulse power handling per 10/1000 μs waveform, with thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-lead), enabling reliable operation up to 150 °C junction temperature under derated conditions per Figure 2 of the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 83.3 V / 92.1 V - Breakdown occurs within this range at 1 mA test current, defining turn-on threshold |
| VC @ IPPM | 121 V - Clamped voltage across device during 12.4 A 10/1000 μs surge, limiting stress on protected circuit |
| PPPM | 1500 W - Peak transient energy absorption capability under standardized surge waveform |
| ID @ VWM | 1.0 μA - Reverse leakage at rated standoff voltage, ensuring minimal standby power loss |
| TJ max | +150 °C - Maximum allowable junction temperature, supporting high-reliability automotive and industrial use |
| Package | SMC (DO-214AB) - Surface-mount outline with 8.13 mm × 6.22 mm footprint and 3.20 mm height, optimized for automated assembly |
Pinout & Package
SMCJ75CA-E3/9AT uses the SMC (DO-214AB) package: a two-terminal, bidirectional surface-mount device with no polarity marking. Terminals are matte tin-plated leads solderable per J-STD-002 and JESD 22-B102, mounted on 8.0 mm × 8.0 mm copper pads per JEDEC standard layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | One terminal of symmetrical bidirectional junction; conducts during negative transients |
| Cathode | Transient current entry (positive polarity) | Other terminal of symmetrical bidirectional junction; conducts during positive transients |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 1500 W peak pulse power | Supports robust immunity to IEC 61000-4-5 Level 4 (4 kV) surges when properly laid out |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns response time) |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity handling |
| AEC-Q101 qualification option | HE3/HM3 variants available for automotive-grade reliability; E3 suffix denotes commercial RoHS compliance |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V vehicle power rails from load-dump and alternator ripple transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed between power rail and ground to clamp ±100 V spikes. Use Value: Limits rail voltage to ≤121 V during 12.4 A surge, preventing damage to MCU power supplies and CAN transceivers. | Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loops) from ESD and field wiring surges. IC Role / Device Role / Timing Role: Low-capacitance TVS connected across signal and return paths near connector entry point. Use Value: 1.0 μA leakage at 75 V ensures minimal impact on loop accuracy; 121 V clamping preserves ADC input integrity. |
| Telecom Data Line Surge Suppression | Consumer Equipment AC-DC Adapter Input Protection |
Use Scenario: Safeguarding Ethernet PHY interfaces or RS-485 transceivers exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional TVS installed differential-mode across twisted-pair lines before line driver/receiver. Use Value: Symmetrical 83.3–92.1 V breakdown ensures balanced clamping, maintaining signal integrity during common-mode transients. | Use Scenario: Adding secondary overvoltage protection on primary-side rectifier outputs in offline SMPS designs. IC Role / Device Role / Timing Role: TVS placed across bulk capacitor to absorb residual switch-node ringing and line surges. Use Value: 1500 W rating handles repetitive 10/1000 μs events; 150 °C TJ max supports enclosed, thermally constrained enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC75CA | Same VWM (75 V) and VC (121 V), but lower PPPM (600 W); smaller SMA package | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 | Select only where board space is critical and surge threat level is ≤Level 2 |
| 1.5KE75CA | Through-hole DO-201 package; identical VWM, VBR, and VC; same 1500 W rating | Requires wave solder or hand-solder process; incompatible with fully SMT production | Choose for prototyping or legacy through-hole designs where rework tolerance is prioritized |
Compared with SAC75CA and 1.5KE75CA, the SMCJ75CA-E3/9AT provides optimal balance of high surge capacity, SMT manufacturability, and thermal performance in compact SMC packaging-making it preferred for volume automotive and industrial PCBs requiring automated assembly and AEC-Q101-ready variants.
Availability
SMCJ75CA-E3/9AT is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom data line surge suppression requiring stable component supply and full traceability.
Supply support for SMCJ75CA-E3/9AT 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 developed for high-power, surface-mount transient suppression in harsh environments-targeting automotive, industrial, and telecom systems demanding AEC-Q101 qualification, high surge immunity, and automated manufacturing compatibility.
FAQ
What is the standoff voltage and clamping voltage of SMCJ75CA-E3/9AT?
The SMCJ75CA-E3/9AT has a standoff voltage (VWM) of 75 V and a maximum clamping voltage (VC) of 121 V at 12.4 A peak pulse current under 10/1000 μs waveform. This means it remains inactive below 75 V and limits transient voltage to no more than 121 V during specified surge events, protecting downstream components such as microcontrollers and communication ICs.
Is SMCJ75CA-E3/9AT bidirectional and how does that affect circuit design?
Yes, SMCJ75CA-E3/9AT is a bidirectional TVS diode, meaning it clamps symmetrically for both positive and negative voltage transients without polarity marking. This eliminates the need for orientation during placement and simplifies protection of AC-coupled, differential, or floating signal paths-such as RS-485 lines or sensor bridges-where polarity reversal may occur.
What package type and mounting requirements apply to SMCJ75CA-E3/9AT?
SMCJ75CA-E3/9AT uses the SMC (DO-214AB) surface-mount package with 8.13 mm × 6.22 mm body and 3.20 mm height. It requires 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal for optimal thermal dissipation and surge current handling, and is compatible with standard lead-free reflow profiles (MSL Level 1, 260 °C peak).
Does SMCJ75CA-E3/9AT meet automotive reliability standards?
The base SMCJ75CA-E3/9AT is RoHS-compliant and commercial-grade; however, Vishay offers AEC-Q101 qualified versions under ordering codes SMCJ75CAHE3_X (RoHS + AEC-Q101) and SMCJ75CAHM3_X (halogen-free + AEC-Q101). These variants undergo stress testing per AEC-Q101 and are suitable for automotive powertrain and chassis applications.
How does the thermal performance of SMCJ75CA-E3/9AT impact system-level design?
SMCJ75CA-E3/9AT has RθJA = 75 °C/W and RθJL = 15 °C/W, meaning its junction temperature rise depends heavily on PCB copper area and airflow. At 1500 W surge, even brief pulses cause localized heating; thus, proper pad sizing (8.0 mm × 8.0 mm), internal copper planes, and thermal vias are essential to maintain TJ ≤ 150 °C and ensure long-term reliability in repeated surge events.
SMCJ75CA-E3/9AT 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-E3/9AT FAQ
1.How can I place an order for SMCJ75CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ75CA-E3/9AT 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-E3/9AT reliable?
The price and inventory of SMCJ75CA-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ75CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ75CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ75CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ75CA-E3/9AT?
SMCJ75CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ75CA-E3/9AT 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-E3/9AT?
For technical support, including SMCJ75CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ75CA-E3/9AT requirements.
6.How does Aetrix verify that SMCJ75CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ75CA-E3/9AT 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-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ75CA-E3/9AT?
All SMCJ75CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ75CA-E3/9AT, 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-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ75CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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