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Vishay General Semiconductor - Diodes Division SMCJ43AHE3/9AT
- Part No.:
- SMCJ43AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ43AHE3/9AT.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,471
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Product details
Overview
SMCJ43AHE3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 43 V standoff voltage (VWM), 47.8–52.8 V breakdown range (VBR at 1 mA), 69.4 V maximum clamping voltage (VC) at 21.6 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive ECUs, industrial I/O modules, and sensor interface circuits.
For engineers reviewing the SMCJ43AHE3/9AT datasheet, SMCJ43AHE3/9AT pinout, SMCJ43AHE3/9AT application, or SMCJ43AHE3/9AT equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 1500 W surge capability, low 0.102 %/°C VBR temperature coefficient, and compatibility with automated SMT assembly on standard PCB pad layouts.
Technical Context
This TVS diode operates as a shunt-clamping device: under normal conditions it presents high impedance (>1 µA leakage at 43 V), but triggers into low-impedance conduction when transient voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR and fast response (<1 ns), while the SMC package supports 200 A non-repetitive forward surge current (IFSM) and meets MSL Level 1 per J-STD-020.
The device is rated for -55 °C to +150 °C operating junction temperature, with thermal resistance RθJA = 75 °C/W (on recommended 8 mm × 8 mm copper pads) and RθJL = 15 °C/W. Its AEC-Q101 qualification confirms suitability for automotive under-hood applications where reliability under thermal cycling and mechanical stress is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 43 V - Maximum continuous reverse working voltage before significant leakage; defines safe operating margin below clamping onset |
| VBR (Breakdown Voltage) | 47.8–52.8 V at 1 mA - Confirmed breakdown range ensuring predictable turn-on during transients |
| VC (Clamping Voltage) | 69.4 V at 21.6 A (10/1000 µs) - Limits protected circuit voltage during surge, enabling downstream IC survival |
| PPPM (Peak Pulse Power) | 1500 W - Sustains high-energy transients such as ISO 7637-2 pulse 1/2a/5a without failure |
| IPPM (Peak Pulse Current) | 21.6 A - Peak current handled at VC; determines minimum series impedance required upstream |
| TJ max. | +150 °C - Enables operation in high-temperature environments including engine control units |
| Temperature Coefficient | 0.102 %/°C - Predictable VBR drift across temperature, critical for precision protection thresholds |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified. Cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias | Connected to ground or lower-potential rail in unidirectional configuration |
| Cathode | Current exit point in forward bias; marked with band | Connected to protected line (e.g., 43 V supply rail); conducts during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensors |
| Glass passivated junction | Ensures long-term stability of VBR and low parameter drift under thermal/humidity stress |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD, load dump) |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns |
| 1500 W 10/1000 µs rating | Withstands high-energy surges common in industrial motor drives and automotive power systems |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Digital Input Module |
|---|---|
Use Scenario: Protects microcontroller I/O and CAN transceiver power rails from load-dump transients (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Shunt-clamping TVS placed directly at connector entry point to clamp surges before reaching sensitive logic. Use Value: Clamps 12 V system transients to ≤69.4 V, preserving MCU and transceiver integrity without derating design margins. | Use Scenario: Shields 24 V DC digital input circuitry from inductive kickback when switching solenoids or relays. IC Role / Device Role / Timing Role: Unidirectional TVS connected between input line and ground to suppress negative-going transients. Use Value: Withstands 21.6 A surge current while limiting voltage to 69.4 V, preventing latch-up or gate oxide damage in input buffer ICs. |
| Automotive Camera Module Power Rail | Consumer IoT Sensor Node Supply Line |
Use Scenario: Safeguards 5 MP image sensor and ISP power inputs against ESD (IEC 61000-4-2) and cable discharge events. IC Role / Device Role / Timing Role: TVS placed at board edge connector to absorb fast transients before they propagate to analog front-end. Use Value: Sub-1 ns response time and 69.4 V clamping ensure sensor pixel array and ADC reference remain undisturbed. | Use Scenario: Protects battery-powered environmental sensor node (e.g., temperature/humidity) from electrostatic discharge during handling or field deployment. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA at 43 V) unidirectional TVS on main 3.3 V or 5 V supply rail. Use Value: Maintains <1 µA standby leakage to preserve battery life while delivering 1500 W surge immunity. |
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), SMA package (smaller footprint, higher RθJA), same VWM/VC specs | Not AEC-Q101 qualified; limited to consumer/industrial use with lower surge energy requirements | Select when space-constrained layout and cost sensitivity outweigh automotive qualification needs |
| SMCJ43CAHE3/9AT | Bidirectional variant; identical VWM, VBR, VC, and PPPM, but symmetrical clamping in both polarities | Required for AC-coupled or floating signal lines (e.g., RS-485, USB D+/D−) where polarity reversal occurs | Choose only if bidirectional protection is mandated by signal architecture - not a drop-in replacement for unidirectional use |
Compared with SMAJ43A-E3/61T and SMCJ43CAHE3/9AT, the SMCJ43AHE3/9AT uniquely combines AEC-Q101 qualification, 1500 W surge capacity, and unidirectional polarity in the robust SMC package - making it the preferred choice for automotive power rail protection where reliability under thermal and mechanical stress is non-negotiable.
Availability
SMCJ43AHE3/9AT is available at Aetrix Electronics and suitable for automotive ECU designs, industrial PLC input protection, and camera module power conditioning requiring stable component supply across extended production lifecycles.
Supply support for SMCJ43AHE3/9AT 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 automotive-grade qualification.
The SMCJ series is engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where sustained surge immunity and long-term parametric stability are mandatory.
FAQ
What is the clamping voltage of the SMCJ43AHE3/9AT at its rated peak pulse current?
The SMCJ43AHE3/9AT has a maximum clamping voltage (VC) of 69.4 V when subjected to its rated 21.6 A peak pulse current with a 10/1000 µs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on the protected circuit during surge events. The SMCJ43AHE3/9AT maintains this clamping performance across its full operating temperature range, supporting robust design margining in automotive and industrial applications.
Is the SMCJ43AHE3/9AT qualified for automotive applications?
Yes, the SMCJ43AHE3/9AT is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3", which denotes RoHS-compliant and AEC-Q101 qualified construction. This qualification covers stress tests including temperature cycling, humidity bias, and mechanical shock - validating its suitability for under-hood and chassis-mounted automotive electronics. The SMCJ43AHE3/9AT is explicitly intended for use in engine control units, ADAS cameras, and body control modules where automotive-grade reliability is required.
What is the standoff voltage and breakdown voltage range for the SMCJ43AHE3/9AT?
The SMCJ43AHE3/9AT has a standoff voltage (VWM) of 43 V and a breakdown voltage (VBR) range of 47.8 V to 52.8 V at 1 mA test current. This 4.8 V window between VWM and minimum VBR provides a defined safety margin to prevent false triggering during normal operation while ensuring rapid conduction during overvoltage events. These parameters are guaranteed across the full -55 °C to +150 °C junction temperature range, with a temperature coefficient of 0.102 %/°C.
Does the SMCJ43AHE3/9AT have polarity marking, and how is it oriented in circuit?
Yes, the SMCJ43AHE3/9AT is unidirectional and features a cathode band marking on the SMC (DO-214AB) package. In circuit, the cathode must be connected to the line being protected (e.g., a 43 V supply rail), and the anode to ground. This orientation ensures the device remains reverse-biased during normal operation and conducts only during positive transients exceeding VBR. Reversing polarity would render the device ineffective for overvoltage protection and may cause catastrophic failure under surge conditions.
What is the peak pulse power rating and corresponding test waveform for the SMCJ43AHE3/9AT?
The SMCJ43AHE3/9AT is rated for 1500 W peak pulse power dissipation using the standardized 10/1000 µs double-exponential waveform defined in ANSI/IEEE C62.35. This waveform simulates high-energy transients such as automotive load dump and industrial inductive switching. The 1500 W rating is valid at TA = 25 °C on recommended 8.0 mm × 8.0 mm copper pads; derating applies above 25 °C per the datasheet's Fig. 2 curve. The SMCJ43AHE3/9AT sustains this rating without degradation when mounted per Vishay's specified pad layout.
SMCJ43AHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 69.4V
- Current - Peak Pulse (10/1000µs):
- 21.6A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ43AHE3/9AT FAQ
1.How can I place an order for SMCJ43AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ43AHE3/9AT 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 SMCJ43AHE3/9AT reliable?
The price and inventory of SMCJ43AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ43AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ43AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ43AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ43AHE3/9AT?
SMCJ43AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ43AHE3/9AT 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 SMCJ43AHE3/9AT?
For technical support, including SMCJ43AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ43AHE3/9AT requirements.
6.How does Aetrix verify that SMCJ43AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ43AHE3/9AT 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 SMCJ43AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ43AHE3/9AT?
All SMCJ43AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ43AHE3/9AT, 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 SMCJ43AHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ43AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ43AHE3/9AT Tags
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