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Vishay General Semiconductor - Diodes Division SMCJ43CA/57T
- Part No.:
- SMCJ43CA/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ43CA/57T.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,586
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Product details
Overview
SMCJ43CA/57T from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for clamping voltage transients on signal or power lines. 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 (PPPM) with 10/1000 µs waveform. It is AEC-Q101 qualified and used for automotive sensor line protection.
For engineers reviewing the SMCJ43CA/57T datasheet, SMCJ43CA/57T pinout, SMCJ43CA/57T application, or SMCJ43CA/57T equivalent, key selection criteria include bi-directional clamping capability, 43 V reverse stand-off rating, 1500 W surge handling, RoHS-compliant matte tin terminals, and MSL Level 1 moisture sensitivity for surface-mount reflow compatibility.
Technical Context
The SMCJ43CA/57T operates as a bi-directional avalanche diode, symmetrically clamping overvoltage transients in both polarities without polarity marking. Its breakdown voltage (VBR) ranges from 47.8 V to 52.8 V at 1 mA test current, ensuring consistent triggering across temperature and unit variation.
It delivers 1500 W peak pulse power handling per 10/1000 µs waveform under standard mounting conditions (8.0 mm × 8.0 mm copper pads), with thermal resistance junction-to-lead (RθJL) of 15 °C/W enabling effective heat transfer during surge events.
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 voltage range at 1 mA, defining reliable turn-on threshold |
| VC @ IPPM | 69.4 V - Clamped voltage at 21.6 A peak pulse current, limiting downstream stress |
| PPPM | 1500 W - Peak transient power absorption capability with 10/1000 µs waveform |
| ID @ VWM | 1.0 µA - Low leakage ensures minimal standby power loss and signal integrity |
| TJ max | +150 °C - Maximum junction temperature supporting automotive under-hood operation |
| MSL Level | Level 1 - No floor life limitation; suitable for standard SMT reflow without dry pack |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, bi-directional configuration with no polarity marking. Case meets UL 94 V-0 flammability rating; matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional avalanche junction | No functional distinction between terminals; either terminal serves as anode or cathode depending on transient polarity |
| Case (cathode band absent) | Non-polarized package body | DO-214AB housing provides mechanical robustness and thermal path; absence of band confirms bi-directional identity |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualification | Validated for automotive applications including engine control, ADAS sensors, and infotainment interfaces |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving protection margin for downstream ICs |
| MSL Level 1 rating | Eliminates bake-out requirement and simplifies SMT assembly planning for high-volume production |
| Glass passivated junction | Enhances long-term reliability and stability of breakdown characteristics under thermal cycling |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN, LIN, or analog sensor inputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Voltage clamping device placed at connector interface to shunt transients before reaching MCU or signal conditioner. Use Value: Limits induced voltage to ≤69.4 V during 1500 W surges, preserving signal integrity and preventing latch-up in 3.3 V/5 V sensor front-ends. | Use Scenario: Safeguarding digital input modules in programmable logic controllers against field-wiring transients and relay coil kickback. IC Role / Device Role / Timing Role: Bi-directional TVS placed across input terminals to clamp both positive and negative polarity surges. Use Value: Withstands repeated 10/1000 µs surges up to 21.6 A while maintaining <1 µA leakage at 43 V, ensuring stable logic-level detection. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Shielding Ethernet PHY or RS-485 transceivers from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary surge suppression element on differential pair or common-mode line before isolation transformer. Use Value: Symmetric clamping action maintains differential mode integrity while suppressing common-mode transients up to 1500 W. | Use Scenario: Input-stage transient protection for AC-DC adapters in smart home devices subjected to mains-borne surges. IC Role / Device Role / Timing Role: Secondary-side clamping device after bridge rectifier, protecting switching controller and feedback circuitry. Use Value: 43 V VWM aligns with 36–48 V DC bus ranges; 69.4 V VC prevents overvoltage damage to 65 V-rated MOSFETs and optocouplers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CA | Lower PPPM (600 W), smaller SMB package (DO-214AA), higher RθJA (110 °C/W) | Less robust for high-energy surges; suited for space-constrained consumer PCBs with lower surge exposure | Select SMBJ43CA only when board area is critical and surge threat level is ≤600 W |
| SMCJ43A | Uni-directional variant with cathode band marking; identical VWM, VC, and PPPM ratings | Requires correct polarity orientation; unsuitable for AC or floating lines without external biasing | Choose SMCJ43A only when protecting DC-biased unidirectional signals where polarity is fixed and known |
Compared with SMBJ43CA and SMCJ43A, the SMCJ43CA/57T offers superior energy handling (1500 W vs. 600 W) and bi-directional flexibility-critical for automotive sensor and industrial I/O designs where polarity uncertainty or AC coupling exists.
Availability
SMCJ43CA/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer power adapter designs requiring stable component supply and AEC-Q101 compliance.
Supply support for SMCJ43CA/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, MOSFETs, and protection devices with emphasis on reliability and automotive-grade qualification.
The SMCJ43CA/57T belongs to Vishay's TRANSZORB® family of surface-mount TVS diodes, engineered specifically for high-energy transient suppression in harsh environments including automotive, industrial, and telecom infrastructure.
FAQ
What does the "CA" suffix indicate in SMCJ43CA/57T?
The "CA" suffix in SMCJ43CA/57T denotes a bi-directional configuration, meaning the device clamps voltage transients equally in both polarities. Unlike uni-directional variants (e.g., SMCJ43A), it has no cathode marking and is used where signal lines lack defined DC bias or require symmetrical protection-such as differential buses or AC-coupled sensor outputs. This is confirmed in Vishay's datasheet section "Devices for Bi-Direction Applications".
Is SMCJ43CA/57T suitable for automotive applications?
Yes, SMCJ43CA/57T is AEC-Q101 qualified per Vishay's documentation, making it suitable for automotive use cases including engine control units, ADAS sensor interfaces, and body electronics. Its 1500 W peak pulse power rating, 150 °C maximum junction temperature, and MSL Level 1 rating support under-hood deployment and automated SMT manufacturing without special handling.
What is the clamping voltage of SMCJ43CA/57T and why does it matter?
The SMCJ43CA/57T has a maximum clamping voltage (VC) of 69.4 V at 21.6 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value defines the highest voltage imposed on protected circuitry during a surge event-directly determining whether downstream components (e.g., 75 V-rated transceivers or 65 V MOSFETs) remain within safe operating limits. Lower VC improves system robustness.
How does the DO-214AB (SMCJ) package affect thermal performance?
The DO-214AB (SMCJ) package of SMCJ43CA/57T provides a thermal resistance junction-to-lead (RθJL) of 15 °C/W, enabling efficient heat conduction from the silicon die to PCB copper pads. When mounted on 8.0 mm × 8.0 mm copper pads per terminal-as specified in Vishay's derating curves-it sustains full 1500 W surge capability without exceeding 150 °C junction temperature during transient events.
Does SMCJ43CA/57T require special handling during PCB assembly?
No, SMCJ43CA/57T is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and requires no dry pack storage or baking prior to reflow soldering. Its matte tin-plated leads meet J-STD-002 and JESD 22-B102 solderability standards, supporting standard lead-free reflow profiles up to 260 °C peak temperature-ideal for high-throughput SMT lines.
SMCJ43CA/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:
- Obsolete
- 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/57T FAQ
1.How can I place an order for SMCJ43CA/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ43CA/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/57T reliable?
The price and inventory of SMCJ43CA/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/57T is usually 5 days.
3.What payment methods are accepted for SMCJ43CA/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ43CA/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ43CA/57T?
SMCJ43CA/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ43CA/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/57T?
For technical support, including SMCJ43CA/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ43CA/57T requirements.
6.How does Aetrix verify that SMCJ43CA/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ43CA/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/57T meets industry standards.
7.What is the process for return or replacement of SMCJ43CA/57T?
All SMCJ43CA/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ43CA/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/57T part is unused and in its original packaging.
Return procedure for SMCJ43CA/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ43CA/57T Tags
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