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Vishay General Semiconductor - Diodes Division SMCJ43CAHE3_A/H
- Part No.:
- SMCJ43CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ43CAHE3_A/H.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,278
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Product details
Overview
SMCJ43CAHE3_A/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 43 V stand-off voltage (VWM), 69.4 V maximum clamping voltage (VC) at 21.6 A peak pulse current (IPPM), and 1500 W peak pulse power dissipation (10/1000 µs waveform), commonly deployed on automotive sensor signal lines and industrial I/O interfaces.
For engineers reviewing the SMCJ43CAHE3_A/H datasheet, SMCJ43CAHE3_A/H pinout, SMCJ43CAHE3_A/H application, or SMCJ43CAHE3_A/H equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification, low incremental surge resistance, and compatibility with automated SMT placement on 8 mm × 8 mm copper pads.
Technical Context
This device operates as a voltage-clamping protector using an avalanche breakdown mechanism, with symmetrical breakdown voltages (VBR min/max = 47.8 V / 52.8 V at 1 mA test current) in both directions. Its low thermal resistance (RθJL = 15 °C/W) supports reliable energy dissipation during repetitive transients.
The SMCJ43CAHE3_A/H meets J-STD-020 MSL Level 1 (peak reflow ≤ 260 °C), has matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and is qualified to AEC-Q101 for automotive underhood and chassis applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before clamping initiates |
| VC @ IPPM | 69.4 V - Clamped voltage seen by protected circuit during 21.6 A 10/1000 µs surge |
| IPPM | 21.6 A - Peak surge current capability under standard 10/1000 µs waveform |
| PPPM | 1500 W - Transient power handling capacity without degradation |
| TJ max | +150 °C - Maximum junction temperature enabling operation in under-hood automotive environments |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 8.13 mm footprint and 3.20 mm height |
| AEC-Q101 | Qualified - Validated for automotive reliability per stress test requirements including HTOL, TC, and HTRB |
Pinout & Package
SMCJ43CAHE3_A/H uses the SMC (DO-214AB) package: a surface-mount, bidirectional device with no polarity marking (unlike unidirectional variants which feature a cathode band). The two terminals are electrically symmetric and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as anode or cathode depending on instantaneous polarity of transient event |
| Terminal 2 | Anode / Cathode (bidirectional) | Electrically identical to Terminal 1; no functional distinction - full symmetry enables universal placement |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines without polarity concerns |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS sensor modules requiring long-term field reliability |
| Low clamping ratio (VC/VWM = 1.61) | Minimizes voltage overshoot during ESD/EFT events, reducing risk of downstream IC latch-up or damage |
| MSL Level 1 rating | Supports standard lead-free reflow profiles without preconditioning, simplifying manufacturing flow |
| Glass passivated junction | Enhances long-term stability and moisture resistance versus epoxy-passivated alternatives |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed directly at connector entry point to shunt surge energy before reaching interface IC. Use Value: Withstands 1500 W surges while limiting clamped voltage to 69.4 V, ensuring protected transceivers remain within absolute maximum ratings. | Use Scenario: Safeguarding PLC digital input modules against induced transients from relay coil switching and motor drive noise. IC Role / Device Role / Timing Role: Bidirectional transient suppressor mounted across input terminals to clamp both positive and negative polarity spikes. Use Value: Symmetrical 47.8–52.8 V breakdown ensures consistent protection regardless of transient polarity, eliminating need for dual unidirectional devices. |
| Consumer Power Adapter Input | Telecom Line Card Surge Protection |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters subjected to lightning-induced surges on DC output rails. IC Role / Device Role / Timing Role: Standoff-rated TVS placed between +VOUT and GND to clamp fast-rising transients before reaching downstream regulators. Use Value: 43 V VWM allows stable operation under nominal 36–42 V adapter outputs while triggering reliably above 47.8 V. | Use Scenario: Primary protection stage on Ethernet PHY or xDSL line interface cards exposed to telecom-grade lightning surges (IEC 61000-4-5). IC Role / Device Role / Timing Role: First-line TVS element absorbing bulk surge energy prior to secondary filtering and IC-level ESD protection. Use Value: 1500 W PPPM rating and low Rsurge ensure effective energy diversion without thermal runaway during multi-kV transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CAHE3_A/H | Lower PPPM (600 W), smaller SMB (DO-214AA) package, same VWM/VC specs | Suitable for space-constrained consumer or telecom designs where 1500 W headroom is not required | Select when board area is critical and surge threat level is moderate (e.g., IEC 61000-4-2 only) |
| SMCJ43AHE3_A/H | Unidirectional variant; identical VWM, VC, and PPPM but asymmetric conduction (cathode-marked) | Required only where DC-biased signal paths demand directional clamping (e.g., single-ended power rail protection) | Choose only if circuit topology mandates unidirectional behavior - otherwise SMCJ43CAHE3_A/H offers greater flexibility |
Compared with SMBJ43CAHE3_A/H and SMCJ43AHE3_A/H, the SMCJ43CAHE3_A/H uniquely combines 1500 W surge capacity, bidirectional symmetry, and AEC-Q101 qualification - making it the preferred choice for automotive and high-reliability industrial applications demanding full-polarity transient immunity without layout constraints.
Availability
SMCJ43CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom line interface protection, and consumer power adapter designs requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ43CAHE3_A/H 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 high-reliability and automotive-grade performance.
The SMCJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments including automotive, industrial automation, and telecommunications infrastructure.
FAQ
What does the "CA" suffix indicate in SMCJ43CAHE3_A/H?
The "CA" suffix denotes a bidirectional configuration: the SMCJ43CAHE3_A/H provides symmetrical clamping in both polarities, with identical breakdown (47.8–52.8 V) and clamping (69.4 V) characteristics regardless of voltage polarity. This eliminates the need for polarity-aware placement and supports AC-coupled or differential signal protection - unlike unidirectional "A" variants that require correct cathode orientation.
Is SMCJ43CAHE3_A/H qualified for automotive use?
Yes, SMCJ43CAHE3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3", which designates RoHS-compliant and AEC-Q101-qualified versions. It undergoes stress testing including high-temperature operating life (HTOL), temperature cycling (TC), and highly accelerated stress testing (HAST) to meet automotive reliability standards for under-hood and chassis applications.
What is the maximum clamping voltage of SMCJ43CAHE3_A/H and under what conditions is it specified?
The maximum clamping voltage of SMCJ43CAHE3_A/H is 69.4 V, measured at a peak pulse current (IPPM) of 21.6 A using the standardized 10/1000 µs double-exponential surge waveform. This value represents the worst-case voltage imposed on the protected circuit during a full-power transient event and is guaranteed across the operating temperature range of −55 °C to +150 °C.
How does the SMCJ43CAHE3_A/H differ from the SMCJ43AHE3_A/H variant?
The SMCJ43CAHE3_A/H is bidirectional with no polarity marking and symmetrical electrical behavior, whereas the SMCJ43AHE3_A/H is unidirectional, featuring a cathode band and conducting only in reverse bias. Both share identical VWM (43 V), VC (69.4 V), and PPPM (1500 W), but the unidirectional version cannot protect AC signals or circuits with bipolar transients without additional design considerations.
What PCB pad layout is recommended for optimal thermal and surge performance of SMCJ43CAHE3_A/H?
Vishay specifies a minimum pad layout of 0.31" × 0.31" (8.0 mm × 8.0 mm) copper areas per terminal for SMCJ43CAHE3_A/H to achieve rated 1500 W pulse power and maintain junction temperature within limits. Using smaller pads reduces thermal mass and increases RθJA, degrading surge capability and potentially causing premature failure during repeated transients.
SMCJ43CAHE3_A/H 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):
- 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)
SMCJ43CAHE3_A/H FAQ
1.How can I place an order for SMCJ43CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ43CAHE3_A/H 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 SMCJ43CAHE3_A/H reliable?
The price and inventory of SMCJ43CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ43CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ43CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ43CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ43CAHE3_A/H?
SMCJ43CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ43CAHE3_A/H 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 SMCJ43CAHE3_A/H?
For technical support, including SMCJ43CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ43CAHE3_A/H requirements.
6.How does Aetrix verify that SMCJ43CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ43CAHE3_A/H 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 SMCJ43CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ43CAHE3_A/H?
All SMCJ43CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ43CAHE3_A/H, 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 SMCJ43CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMCJ43CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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