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Vishay General Semiconductor - Diodes Division SMCJ43CAHE3_A/I
- Part No.:
- SMCJ43CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ43CAHE3_A/I.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,137
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Product details
Overview
SMCJ43CAHE3_A/I 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 43 V standoff voltage (VWM), 69.4 V clamping voltage (VC) at 21.6 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM). It protects sensitive ICs, MOSFETs, and sensor signal lines against inductive switching transients and lightning-induced surges in automotive and industrial power rails.
For engineers reviewing the SMCJ43CAHE3_A/I datasheet, SMCJ43CAHE3_A/I pinout, SMCJ43CAHE3_A/I application, or SMCJ43CAHE3_A/I equivalent, this AEC-Q101-qualified TVS offers verified bidirectional clamping, low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for automotive ECU, industrial motor drive, and telecom power interface designs requiring robust transient immunity.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) of 47.8–52.8 V at 1 mA test current and maximum reverse leakage (ID) ≤1.0 μA at 43 V standoff. Its fast response time (<1 ns) and low clamping ratio (VC/VWM ≈ 1.61) ensure minimal overvoltage exposure during 10/1000 μs surges.
Thermally, it features RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation up to TJ = +150 °C. The device is qualified per AEC-Q101 and meets UL 497B recognition (QVGQ2), supporting automotive-grade reliability without derating below 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 43 V - Maximum continuous reverse operating voltage before clamping begins; defines system rail compatibility. |
| VBR (Breakdown Voltage) | 47.8–52.8 V at 1 mA - Confirmed bidirectional avalanche onset range; ensures symmetrical protection behavior. |
| VC (Clamping Voltage) | 69.4 V at IPPM = 21.6 A - Peak voltage seen by protected circuit during 10/1000 μs surge; determines safe margin for downstream components. |
| PPPM (Peak Pulse Power) | 1500 W - Energy-handling capacity under standardized 10/1000 μs waveform; supports IEC 61000-4-5 Level 4 compliance. |
| TJ max. | +150 °C - Maximum junction temperature rating; enables use in under-hood automotive environments and high-ambient industrial enclosures. |
| AEC-Q101 Qualified | Yes - Validated for automotive electronics per stress test requirements including HTOL, TC, UHAST, and ESD; supports PPAP documentation. |
| Package | SMC (DO-214AB) - Industry-standard 2-pin surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal footprint for optimal PCB heat dissipation. |
Pinout & Package
SMCJ43CAHE3_A/I uses the SMC (DO-214AB) package: a 2-terminal, non-polarized surface-mount case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Bidirectional variants have no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional transient conduction path | Both terminals function identically; no cathode band marking - enables placement flexibility and eliminates orientation errors in automated assembly. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines and dual-rail power supplies without external polarity management. |
| 1500 W peak pulse power | Supports IEC 61000-4-5 surge immunity up to 4 kV (line-to-earth) in properly designed layouts with recommended 8.0 mm × 8.0 mm copper pads. |
| AEC-Q101 qualification | Validates long-term reliability in automotive applications including engine control units, body control modules, and ADAS power domains. |
| MSL Level 1 (260 °C peak) | Permits standard lead-free reflow without baking or special handling - reduces manufacturing cost and process complexity. |
| UL 497B recognition (QVGQ2) | Confirms compliance with safety standards for telecom and industrial signal line protectors, simplifying end-equipment certification. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-supplied ECUs from load dump and alternator transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Bidirectional TVS clamps positive and negative voltage spikes before they reach microcontroller power pins or CAN transceiver inputs. Use Value: Limits transient voltage to ≤69.4 V, preserving 3.3 V/5 V logic supply integrity and preventing latch-up or gate oxide damage in downstream ICs. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) from ESD and field-induced surges in factory automation sensors. IC Role / Device Role / Timing Role: Placed across signal and return lines to shunt fast transients while maintaining DC signal fidelity due to <1.0 μA leakage at 43 V. Use Value: Prevents false triggering or calibration drift in precision ADC front-ends by suppressing >1 kV ESD events without loading the signal path. |
| Telecom DC Power Interface | Motor Drive Gate Driver Protection |
|
Use Scenario: Safeguarding PoE-powered equipment (e.g., IP cameras) against lightning-induced surges on 48 V DC input lines. IC Role / Device Role / Timing Role: Primary surge suppression stage upstream of DC-DC converters and hot-swap controllers. Use Value: Absorbs 1500 W surge energy within 1000 μs, limiting voltage overshoot to 69.4 V and avoiding overvoltage shutdown of secondary regulation stages. |
Use Scenario: Protecting high-side/low-side gate drivers in BLDC inverters from shoot-through-inducing voltage spikes during IGBT/MOSFET switching. IC Role / Device Role / Timing Role: Mounted directly across driver supply rails (e.g., VDD–VEE) to clamp cross-conduction transients. Use Value: Fast <1 ns response prevents gate oxide stress and maintains timing margins in 100 kHz+ PWM systems with tight dead-time control. |
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/I | Lower PPPM (600 W), smaller SMB (DO-214AA) package, identical VWM/VC specs. | Suitable for space-constrained consumer or lower-energy industrial interfaces where 1500 W surge margin is not required. | Select when board area is limited and peak surge energy does not exceed 600 W - reduces footprint by ~30% vs. SMCJ. |
| SMCJ43CAHM3_A/I | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | Required for automotive Tier 1 suppliers mandating halogen-free materials in final assemblies. | Choose when compliance with JEDEC J-STD-204 or OEM-specific green material directives is mandatory. |
Compared with SMCJ43CAHE3_A/I, SMBJ43CAHE3_A/I trades surge capacity for compactness, while SMCJ43CAHM3_A/I maintains full performance with halogen-free construction - enabling design reuse across commercial, industrial, and automotive platforms with minimal layout or qualification impact.
Availability
SMCJ43CAHE3_A/I is available at Aetrix Electronics and suitable for automotive ECU, industrial motor drive, and telecom power interface applications requiring stable component supply, AEC-Q101 validation, and long-term production continuity.
Supply support for SMCJ43CAHE3_A/I 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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure tolerance and long-term stability are non-negotiable.
FAQ
What is the clamping voltage of the SMCJ43CAHE3_A/I at its rated peak pulse current?
The SMCJ43CAHE3_A/I has a maximum clamping voltage (VC) of 69.4 V at its specified peak pulse current (IPPM) of 21.6 A under a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in the Vishay datasheet revision 09-Jan-2024. The SMCJ43CAHE3_A/I maintains this clamping performance bidirectionally, ensuring consistent protection regardless of surge polarity.
Is the SMCJ43CAHE3_A/I suitable for automotive applications?
Yes, the SMCJ43CAHE3_A/I is AEC-Q101 qualified and explicitly designated for automotive use with the "HE3" suffix indicating RoHS-compliant and AEC-Q101-qualified construction. It meets UL 497B recognition (QVGQ2) and supports ISO 7637-2 Pulse 5a load dump protection in ECUs and body control modules. The SMCJ43CAHE3_A/I operates reliably from –55 °C to +150 °C junction temperature.
How does the bidirectional nature of the SMCJ43CAHE3_A/I affect PCB layout?
The SMCJ43CAHE3_A/I has no polarity marking and functions identically in either orientation, eliminating orientation-dependent placement errors during automated assembly. Unlike unidirectional TVS diodes, the SMCJ43CAHE3_A/I requires no cathode band alignment - simplifying layout, reducing inspection overhead, and enabling direct replacement in AC-coupled or floating signal paths without circuit modification.
What is the thermal resistance of the SMCJ43CAHE3_A/I, and how does it impact power dissipation?
The SMCJ43CAHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead resistance (RθJL) of 15 °C/W when mounted on the recommended 8.0 mm × 8.0 mm copper pads. These values allow the SMCJ43CAHE3_A/I to sustain its 6.5 W steady-state power dissipation at TA = 50 °C and support repeated surge events without exceeding +150 °C junction temperature under proper PCB thermal design.
Does the SMCJ43CAHE3_A/I require special handling during reflow soldering?
No - the SMCJ43CAHE3_A/I is rated MSL Level 1 per J-STD-020 with a maximum peak reflow temperature of 260 °C, meaning it can be processed using standard lead-free reflow profiles without pre-baking or dry-packaging. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102, ensuring robust solder joint formation. The SMCJ43CAHE3_A/I is supplied in 13" tape-and-reel (I code) for seamless SMT line integration.
SMCJ43CAHE3_A/I 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/I FAQ
1.How can I place an order for SMCJ43CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ43CAHE3_A/I 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/I reliable?
The price and inventory of SMCJ43CAHE3_A/I 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/I is usually 5 days.
3.What payment methods are accepted for SMCJ43CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ43CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ43CAHE3_A/I?
SMCJ43CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ43CAHE3_A/I 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/I?
For technical support, including SMCJ43CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ43CAHE3_A/I requirements.
6.How does Aetrix verify that SMCJ43CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ43CAHE3_A/I 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/I meets industry standards.
7.What is the process for return or replacement of SMCJ43CAHE3_A/I?
All SMCJ43CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ43CAHE3_A/I, 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/I part is unused and in its original packaging.
Return procedure for SMCJ43CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ43CAHE3_A/I Tags
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