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Vishay General Semiconductor - Diodes Division SMCJ75A-E3/9AT
- Part No.:
- SMCJ75A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ75A-E3/9AT.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,342
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Product details
Overview
SMCJ75A-E3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 75 V standoff voltage, 83.3–92.1 V breakdown voltage at 1 mA, and 121 V clamping voltage at 12.4 A peak pulse current. It delivers 1500 W peak pulse power handling under 10/1000 µs waveform and operates across -55 °C to +150 °C junction temperature range, commonly used to protect power rails and I/O lines in industrial motor drives.
For engineers reviewing the SMCJ75A-E3/9AT datasheet, SMCJ75A-E3/9AT pinout, SMCJ75A-E3/9AT application, or SMCJ75A-E3/9AT equivalent, key selection criteria include unidirectional polarity, 1.0 µA max reverse leakage at 75 V, 0.106 %/°C VBR temperature coefficient, and RoHS-compliant matte tin-plated leads meeting J-STD-002 solderability standards.
Technical Context
This TVS diode employs a glass-passivated silicon junction optimized for fast response (<1 ns) to transient overvoltages and low incremental surge resistance to maintain stable clamping during high-current surges. Its unidirectional configuration provides cathode-banded polarity for DC rail protection, with thermal resistance of 75 °C/W (junction-to-ambient) on standard 8.0 mm × 8.0 mm copper pads.
The device meets MSL Level 1 per J-STD-020, supports peak forward surge current of 200 A (8.3 ms half-sine), and is rated for 6.5 W steady-state power dissipation at TA = 50 °C - enabling reliable operation in thermally constrained PCB layouts without active cooling.
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 at IT = 1 mA - ensures predictable turn-on threshold across temperature and unit variation |
| VC @ IPPM | 121 V at 12.4 A - limits downstream voltage stress during 1500 W transient events |
| PPPM | 1500 W - peak pulse power rating for 10/1000 µs waveform, defining surge energy capacity |
| ID @ VWM | 1.0 µA - ultra-low leakage preserves efficiency in high-impedance bias networks |
| TJ max | +150 °C - enables deployment in under-hood automotive or industrial ambient environments |
| RθJA | 75 °C/W - quantifies thermal bottleneck on standard FR-4 with minimal copper area |
Pinout & Package
Package: SMC (DO-214AB), molded epoxy case with matte tin-plated leads; cathode indicated by band on body; compliant with UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward conduction mode | Connected to lower-potential side of protected line (e.g., GND or return path) |
| Cathode | Current exit terminal in forward conduction mode; marked with band | Connected to higher-potential side (e.g., 75 V rail); defines unidirectional clamping direction |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR and low leakage over lifetime, even under humidity or thermal cycling stress |
| Low-profile SMC package | Enables automated placement and fits compact power supply layouts with 7.75 mm × 8.13 mm footprint |
| 1500 W peak pulse rating | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth) without degradation |
| AEC-Q101 qualified variant available | HE3 suffix option supports automotive-grade reliability validation for engine control modules |
| MSL Level 1 rating | Allows unlimited floor life and reflow compatibility up to 260 °C peak without baking |
Applications
| Industrial Motor Drives | Automotive Power Distribution Units |
|---|---|
Use Scenario: Protection of gate drivers and microcontroller supply rails against inductive kickback from 24 V solenoid switching. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 24 V input and ground to clamp transients below 121 V. Use Value: Prevents latch-up or permanent damage to 3.3 V logic ICs sharing the same 24 V input stage. | Use Scenario: Surge suppression on 12 V battery feed lines entering body control modules. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power input, upstream of DC-DC converters. Use Value: Limits voltage excursion to ≤121 V during load dump (ISO 7637-2 Pulse 5a), preserving downstream regulators. |
| Telecom Power Supplies | PLC Digital I/O Modules |
Use Scenario: Input-stage protection for AC/DC adapters powering VoIP phones exposed to lightning-induced surges. IC Role / Device Role / Timing Role: First-line TVS on secondary-side 48 V output rail before isolation barrier. Use Value: Clamps induced transients within 1 ns, preventing coupling into isolated data interfaces (e.g., Ethernet PHY). | Use Scenario: Protection of 24 V digital input channels receiving signals from field sensors in factory automation. IC Role / Device Role / Timing Role: Parallel-connected TVS on each channel's input node to absorb ESD and inductive spikes. Use Value: Maintains signal integrity by limiting voltage overshoot to <121 V while adding only 1.0 µA leakage at 24 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75A-E3/52T | Lower PPPM (600 W), SMB package (smaller footprint, higher RθJA = 100 °C/W) | Suitable for lower-energy surges; limited to ≤100 V transients in same layout | Select when board space is constrained and surge threat level is IEC 61000-4-4 Level 3 only |
| 1.5KE75A | Through-hole DO-201 package, same VWM/VBR/VC specs but higher RθJA (100 °C/W), no MSL rating | Requires wave soldering; not suitable for mixed-technology SMT-only assembly | Choose for legacy through-hole designs or where manual repair access is prioritized over automated placement |
Compared with SMCJ75A-E3/9AT, SMBJ75A-E3/52T offers reduced surge margin and thermal performance in a smaller package, while 1.5KE75A trades SMT compatibility and moisture sensitivity compliance for mechanical robustness and serviceability in through-hole systems.
Availability
SMCJ75A-E3/9AT is available at Aetrix Electronics and suitable for industrial motor drives, automotive power distribution units, telecom power supplies, and PLC digital I/O modules requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMCJ75A-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 and application-specific optimization.
The SMCJ series is engineered for high-power transient suppression in harsh environments, targeting industrial, automotive, and telecom systems where robustness against repetitive surges and wide temperature operation are critical design requirements.
FAQ
What is the clamping voltage of SMCJ75A-E3/9AT at its rated peak pulse current?
The SMCJ75A-E3/9AT has a maximum clamping voltage (VC) of 121 V at its specified peak pulse current (IPPM) of 12.4 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during a full-rated surge event. The SMCJ75A-E3/9AT maintains this clamping performance across its operational temperature range, ensuring consistent protection behavior in both ambient and elevated thermal conditions.
Is SMCJ75A-E3/9AT RoHS-compliant and lead-free?
Yes, SMCJ75A-E3/9AT is RoHS-compliant and lead-free, as indicated by the "E3" suffix per Vishay's ordering nomenclature. The device uses matte tin-plated leads that meet J-STD-002 solderability requirements and complies with JEDEC JESD201 Class 2 whisker resistance testing. The molding compound satisfies UL 94 V-0 flammability standards, and the entire construction adheres to EU RoHS Directive 2011/65/EU without exemptions.
Does SMCJ75A-E3/9AT have AEC-Q101 qualification?
No, SMCJ75A-E3/9AT is not AEC-Q101 qualified; it is a commercial-grade part. However, Vishay offers an automotive-qualified variant under the ordering code SMCJ75AHE3_A/I (or similar HE3-suffixed versions), which undergoes additional stress testing per AEC-Q101. For automotive applications requiring qualification, users must select the HE3 or HM3 suffix variants - the SMCJ75A-E3/9AT itself is intended for industrial and telecom use where AEC-Q101 is not mandated.
What is the thermal resistance of SMCJ75A-E3/9AT and how does it affect PCB layout?
The SMCJ75A-E3/9AT 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. This value assumes standard FR-4 board material and no internal plane layers. To maintain safe junction temperatures under sustained power dissipation, designers should allocate adequate copper area and avoid routing heat-sensitive components nearby. The SMCJ75A-E3/9AT's RθJL of 15 °C/W indicates efficient heat transfer to leads, supporting thermal relief via wider traces or thermal vias.
How does the unidirectional configuration of SMCJ75A-E3/9AT impact its circuit placement?
The unidirectional configuration of SMCJ75A-E3/9AT requires correct orientation: the banded end is the cathode and must connect to the higher-potential side of the protected line (e.g., 75 V rail), while the anode connects to ground or return. This arrangement allows forward conduction only during positive transients, making it ideal for DC supply rail protection. Reversing polarity renders the device non-functional for surge suppression, as it behaves like a high-voltage rectifier rather than a clamping element. The SMCJ75A-E3/9AT's cathode band is clearly marked for visual verification during inspection.
SMCJ75A-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:
- 1
- Bidirectional Channels:
- -
- 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)
SMCJ75A-E3/9AT FAQ
1.How can I place an order for SMCJ75A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ75A-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 SMCJ75A-E3/9AT reliable?
The price and inventory of SMCJ75A-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 SMCJ75A-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ75A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ75A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ75A-E3/9AT?
SMCJ75A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ75A-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 SMCJ75A-E3/9AT?
For technical support, including SMCJ75A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ75A-E3/9AT requirements.
6.How does Aetrix verify that SMCJ75A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ75A-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 SMCJ75A-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ75A-E3/9AT?
All SMCJ75A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ75A-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 SMCJ75A-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ75A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ75A-E3/9AT Tags
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