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Vishay General Semiconductor - Diodes Division SMCJ43-E3/9AT
- Part No.:
- SMCJ43-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ43-E3/9AT.pdf
- Description:
- TVS DIODE 43VWM 76.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,404
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Product details
Overview
SMCJ43-E3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for robust overvoltage protection of sensitive electronics. It features a 43 V standoff voltage (VWM), 47.8–52.8 V breakdown range (VBR), 69.4 V clamping voltage at 21.6 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform. It is widely deployed in automotive power line and industrial sensor interface protection.
For engineers reviewing the SMCJ43-E3/9AT datasheet, SMCJ43-E3/9AT pinout, SMCJ43-E3/9AT application, or SMCJ43-E3/9AT equivalent, key selection criteria include clamping performance under 21.6 A surge, thermal resistance (RθJA = 75 °C/W), AEC-Q101 qualification, RoHS compliance, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR (47.8–52.8 V), it avalanches to limit transient energy across protected circuit nodes. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response (<1 ns), while low incremental surge resistance enables effective suppression of inductive switching spikes and ESD events.
The device is rated for continuous operation from –55 °C to +150 °C junction temperature, with 6.5 W power dissipation at TA = 50 °C on infinite heatsink. Its 200 A IFSM rating supports single half-sine surge handling per JESD22-A112, and MSL Level 1 moisture sensitivity allows standard reflow without baking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 47.8 V / 52.8 V - Breakdown voltage range at 1 mA test current; defines turn-on threshold tolerance |
| VC @ IPPM | 69.4 V - Clamped voltage at 21.6 A peak pulse current; determines maximum stress on downstream ICs |
| PPPM | 1500 W - Peak pulse power handling capability with 10/1000 µs waveform; validates surge immunity level |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance; informs PCB pad design and derating above 25 °C |
| IFSM | 200 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports load-dump event survival |
| AEC-Q101 | Qualified - Meets automotive-grade reliability requirements for temperature cycling, HTRB, and mechanical shock |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. Polarity indicated by cathode band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to ground or lower-potential node in unidirectional clamp configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 43 V supply rail); band-marked end |
Key Features
| Feature | Design Value |
|---|---|
| Clamping ratio (VC/VBR) | 1.31–1.45 - Low ratio ensures minimal overvoltage exposure during transients |
| Response time | <1 ns - Enables protection against fast-rising ESD and lightning-induced surges |
| Leakage current | <1.0 µA at 43 V - Negligible standby power loss and signal integrity impact |
| MSL Level | Level 1 (260 °C peak) - Compatible with standard lead-free reflow profiles without preconditioning |
| Whisker resistance | JESD201 Class 1A - Mitigates tin whisker growth risk in long-life automotive applications |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 43 V battery-fed ECUs and body control modules from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between power rail and chassis ground to clamp surges above 43 V. Use Value: Withstands 1500 W pulses and 200 A IFSM, meeting ISO 7637-2 Pulse 5a requirements for 12 V/24 V systems upgraded to 43 V architectures. |
Use Scenario: Safeguarding analog input pins of industrial PLC analog I/O modules exposed to field wiring surges. IC Role / Device Role / Timing Role: Standoff-rated TVS on 4–20 mA loop or ±10 V signal lines, referenced to local ground. Use Value: 69.4 V clamping voltage ensures downstream op-amps and ADCs remain within absolute maximum ratings during 1 kV/500 A surge events. |
| Telecom DC Power Feeds | Consumer Power Adapter Outputs |
Use Scenario: Secondary-side overvoltage protection on -48 V telecom rectifier outputs feeding base station equipment. IC Role / Device Role / Timing Role: Reverse-biased TVS between output rail and return, absorbing coupling transients from AC mains or lightning. Use Value: AEC-Q101 qualification and 150 °C TJ max ensure reliability in high-temperature outdoor enclosures with limited airflow. |
Use Scenario: Output rail protection in universal-input AC/DC adapters delivering regulated 43 V for LED drivers or USB-PD accessories. IC Role / Device Role / Timing Role: Final-stage TVS after regulation, preventing fault propagation from secondary-side short circuits or capacitor failures. Use Value: 75 °C/W RθJA enables thermal management with minimal PCB copper, reducing BOM cost versus larger packages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43A-E3/61T | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W) | Not suitable for 1500 W surge environments; limited to low-energy signal-line protection | Select only when space-constrained layouts preclude SMCJ footprint and surge energy is ≤400 W |
| SMCJ43AHE3/9AT | Identical electrical specs but AEC-Q101 qualified (HE3 suffix), same DO-214AB package | Required for automotive OEM designs requiring full qualification evidence; no functional difference in clamping behavior | Choose SMCJ43AHE3/9AT for Tier 1 automotive programs; SMCJ43-E3/9AT suffices for industrial/commercial use |
Compared with SMAJ43A-E3/61T, SMCJ43-E3/9AT delivers 275 % higher surge power handling and superior thermal performance; versus SMCJ43AHE3/9AT, it offers identical protection performance at lower qualification cost for non-automotive applications.
Availability
SMCJ43-E3/9AT is available at Aetrix Electronics and suitable for automotive power line protection, industrial sensor interface hardening, and telecom DC feed protection requiring stable component supply and traceable sourcing.
Supply support for SMCJ43-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMCJ series belongs to Vishay's TRANSZORB® TVS platform, engineered for high-energy transient suppression in harsh environments including automotive, industrial, and telecom infrastructure.
FAQ
What is the clamping voltage of the SMCJ43-E3/9AT at its rated peak pulse current?
The SMCJ43-E3/9AT has a maximum clamping voltage (VC) of 69.4 V at its rated peak pulse current (IPPM) of 21.6 A, measured using a 10/1000 µs waveform. This value is critical for ensuring downstream components like microcontrollers or analog front-ends remain within their absolute maximum voltage ratings during surge events. The SMCJ43-E3/9AT achieves this clamping performance while maintaining low incremental resistance and fast response.
Is the SMCJ43-E3/9AT suitable for automotive applications?
The SMCJ43-E3/9AT is RoHS-compliant and manufactured in an AEC-Q101-qualified process flow, but the specific part number SMCJ43-E3/9AT carries commercial-grade qualification (E3 suffix). For full AEC-Q101 compliance, the variant SMCJ43AHE3/9AT must be used. Engineers deploying the SMCJ43-E3/9AT in automotive contexts should verify system-level qualification requirements, as the SMCJ43-E3/9AT itself does not carry the HE3 automotive grade marking.
What is the meaning of the "-E3/9AT" suffix in SMCJ43-E3/9AT?
The "-E3" suffix indicates RoHS-compliant, commercial-grade construction with JESD201 Class 1A whisker resistance; "/9AT" specifies packaging in 13-inch diameter plastic tape and reel, with a base quantity of 3500 units. This differs from /57T (7-inch reel, 850 units) and confirms the SMCJ43-E3/9AT is optimized for high-volume SMT assembly. The SMCJ43-E3/9AT uses the same die and DO-214AB package as other variants in the family.
How does the thermal performance of SMCJ43-E3/9AT affect PCB layout?
The SMCJ43-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. To maintain TJ ≤ 150 °C under worst-case power dissipation, PCB layout must provide adequate copper area and thermal vias-especially important during repetitive surge events. Derating curves in the datasheet require adjusting IPPM if ambient temperature exceeds 25 °C, making thermal design integral to reliable SMCJ43-E3/9AT operation.
Does the SMCJ43-E3/9AT have bidirectional capability?
No, the SMCJ43-E3/9AT is a unidirectional TVS diode, as indicated by the absence of the "CA" suffix (e.g., SMCJ43CA would be bidirectional). Its polarity is marked by a cathode band, and it conducts only in forward bias-clamping transients on reverse-biased lines. For AC-coupled or symmetrical surge protection, a bidirectional variant such as SMCJ43CA must be selected; the SMCJ43-E3/9AT is strictly for DC rail protection where polarity is fixed.
SMCJ43-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 76.7V
- Current - Peak Pulse (10/1000µs):
- 19.6A
- 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)
SMCJ43-E3/9AT FAQ
1.How can I place an order for SMCJ43-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ43-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 SMCJ43-E3/9AT reliable?
The price and inventory of SMCJ43-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 SMCJ43-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ43-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ43-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ43-E3/9AT?
SMCJ43-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ43-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 SMCJ43-E3/9AT?
For technical support, including SMCJ43-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ43-E3/9AT requirements.
6.How does Aetrix verify that SMCJ43-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ43-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 SMCJ43-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ43-E3/9AT?
All SMCJ43-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ43-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 SMCJ43-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ43-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ43-E3/9AT Tags
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