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Vishay General Semiconductor - Diodes Division SMCJ43CA-E3/57T
- Part No.:
- SMCJ43CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ43CA-E3/57T.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,085
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Product details
Overview
SMCJ43CA-E3/57T 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 standoff voltage (VWM), 69.4 V maximum clamping voltage (VC) at 21.6 A peak pulse current (IPPM), and 1500 W peak pulse power (10/1000 μs waveform), commonly deployed on power rails and signal lines in automotive ECUs and industrial I/O modules.
For engineers reviewing the SMCJ43CA-E3/57T datasheet, SMCJ43CA-E3/57T pinout, SMCJ43CA-E3/57T application, or SMCJ43CA-E3/57T equivalent, key selection criteria include bidirectional clamping symmetry, low incremental surge resistance, AEC-Q101 qualification eligibility, and compatibility with automated SMT placement on 8 mm × 8 mm copper pads.
Technical Context
The SMCJ43CA-E3/57T operates as a silicon avalanche diode with symmetrical breakdown in both polarities, enabling protection against voltage transients regardless of polarity-critical for AC-coupled or floating signal paths. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and repeatable clamping performance across temperature (-55 °C to +150 °C).
It delivers fast response time (<1 ps) and low dynamic impedance, achieving 69.4 V clamping at 21.6 A under standardized 10/1000 μs surge conditions. Thermal resistance is rated at 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-lead), supporting reliable operation without forced cooling when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 47.8 V / 52.8 V - Breakdown occurs within this range at 1.0 mA test current, confirming bidirectional symmetry |
| VC @ IPPM | 69.4 V - Clamped voltage seen by protected circuit during full 1500 W surge event |
| IPPM | 21.6 A - Peak surge current capability under 10/1000 μs waveform, defining protection margin |
| PPPM | 1500 W - Transient energy handling capacity, enabling robust immunity to ISO 7637-2 Pulse 1/2a/5a |
| TJ max | +150 °C - Maximum junction temperature, supporting under-hood automotive use with derating |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
Pinout & Package
SMCJ43CA-E3/57T uses the standard SMC (DO-214AB) package: a two-terminal, bidirectional device with no polarity marking. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | One terminal of symmetrical avalanche junction; conducts during negative surges |
| Cathode | Transient current entry (positive polarity) | Other terminal of symmetrical avalanche junction; conducts during positive surges |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC characteristics in both directions, eliminating need for polarity-aware layout |
| AEC-Q101 qualification path | Base P/NHE3 suffix variants available for automotive-grade reliability validation (e.g., SMCJ43CAHE3_A) |
| Low clamping ratio | VC/VWM = 1.61 - Minimizes voltage overshoot stress on downstream ICs during surge events |
| MSL Level 1 rating | Unlimited floor life at ≤30 °C/60% RH, compatible with standard reflow profiles up to 260 °C peak |
| UL 94 V-0 molding compound | Flame-retardant encapsulation required for safety-critical industrial and automotive enclosures |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 12 V battery-supplied microcontrollers and CAN transceivers from load dump and jump-start transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed directly at power entry point before DC/DC converter input. Use Value: Withstands 1500 W surges while limiting rail voltage to ≤69.4 V, preventing latch-up or gate oxide damage in downstream ICs. | Use Scenario: Shielding analog sensor outputs (e.g., RTD, thermocouple amplifiers) from ESD and switching noise in PLC analog input modules. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF typical) bidirectional clamp on differential signal pair near connector. Use Value: Symmetrical clamping preserves signal integrity during ±8 kV contact ESD (IEC 61000-4-2) without introducing offset or distortion. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Safeguarding Ethernet PHY interfaces and PoE injectors against lightning-induced surges on twisted-pair lines. IC Role / Device Role / Timing Role: Secondary-level TVS placed after gas discharge tube (GDT) in hybrid protection network. Use Value: Fast <1 ps response complements slower GDT, ensuring sub-microsecond clamping before IC damage threshold is exceeded. | Use Scenario: Suppressing inductive kickback from brushed DC motor drivers in smart home appliances. IC Role / Device Role / Timing Role: Bidirectional clamp across H-bridge output terminals to absorb flyback energy during PWM commutation. Use Value: 21.6 A IPPM handles repetitive 100–200 A motor stall currents without degradation, extending MOSFET lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC43CA | Lower PPPM (400 W), smaller SMA package, higher VC/VWM ratio (1.85) | Restricted to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a | Select only for space-constrained consumer designs where 1500 W surge immunity is not required |
| 1.5KE43CA | Through-hole DO-201 package, identical VWM/VC, but higher RθJA (100 °C/W) | Requires PCB real estate and wave-solder process; less suitable for high-density SMT layouts | Prefer for legacy through-hole systems or prototyping where reflow compatibility is not needed |
Compared with SAC43CA and 1.5KE43CA, the SMCJ43CA-E3/57T provides superior surge handling (1500 W vs. 400 W or 1500 W with inferior thermal dissipation), surface-mount scalability, and automotive-grade manufacturability-making it optimal for production-grade automotive and industrial power electronics.
Availability
SMCJ43CA-E3/57T is available at Aetrix Electronics and suitable for automotive ECU design, industrial I/O protection, and telecom line interface applications requiring stable component supply and RoHS-compliant sourcing.
Supply support for SMCJ43CA-E3/57T 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, and protection devices with emphasis on reliability, precision, and automotive qualification.
The SMCJ series is engineered specifically for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications demanding AEC-Q101 readiness and repeatable clamping performance.
FAQ
What does the "CA" suffix indicate in SMCJ43CA-E3/57T?
The "CA" suffix denotes a bidirectional configuration: the SMCJ43CA-E3/57T provides symmetrical transient voltage suppression in both polarities, with identical breakdown and clamping characteristics for positive and negative surges. This eliminates polarity concerns during PCB layout and supports AC-coupled or floating signal paths-unlike unidirectional "A" variants that require cathode orientation.
Is SMCJ43CA-E3/57T AEC-Q101 qualified?
The SMCJ43CA-E3/57T itself is RoHS-compliant commercial-grade (E3 suffix); however, Vishay offers AEC-Q101-qualified versions under the HE3 suffix (e.g., SMCJ43CAHE3_A). These variants undergo extended stress testing per AEC-Q101 and are marked with "HE3" in the ordering code-critical for automotive under-hood applications where qualification is mandatory.
What is the maximum clamping voltage of SMCJ43CA-E3/57T and how is it measured?
The maximum clamping voltage (VC) of SMCJ43CA-E3/57T is 69.4 V, measured at 21.6 A peak pulse current (IPPM) using a standardized 10/1000 μs double-exponential surge waveform. This value reflects the worst-case voltage imposed on the protected circuit during a full 1500 W transient event, and is guaranteed across temperature and production lot.
Can SMCJ43CA-E3/57T be used in place of a unidirectional TVS like SMCJ43A-E3/57T?
No-SMCJ43CA-E3/57T is bidirectional and lacks polarity marking, while SMCJ43A-E3/57T is unidirectional with a cathode band. Substituting them requires verifying circuit topology: bidirectional use is mandatory for AC signals or floating grounds, whereas unidirectional parts offer lower leakage in DC-biased rails. Layout changes and functional validation are required before interchange.
What is the thermal resistance and mounting requirement for optimal performance of SMCJ43CA-E3/57T?
The SMCJ43CA-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead (RθJL) of 15 °C/W. For rated 1500 W surge handling, Vishay specifies mounting on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal-smaller pads reduce surge capability due to thermal bottlenecking and must be validated per application.
SMCJ43CA-E3/57T 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ43CA-E3/57T FAQ
1.How can I place an order for SMCJ43CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ43CA-E3/57T 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 SMCJ43CA-E3/57T reliable?
The price and inventory of SMCJ43CA-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ43CA-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ43CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ43CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ43CA-E3/57T?
SMCJ43CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ43CA-E3/57T 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 SMCJ43CA-E3/57T?
For technical support, including SMCJ43CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ43CA-E3/57T requirements.
6.How does Aetrix verify that SMCJ43CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ43CA-E3/57T 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 SMCJ43CA-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ43CA-E3/57T?
All SMCJ43CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ43CA-E3/57T, 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 SMCJ43CA-E3/57T part is unused and in its original packaging.
Return procedure for SMCJ43CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ43CA-E3/57T Tags
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