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Vishay General Semiconductor - Diodes Division SMCJ43CA-M3/57T
- Part No.:
- SMCJ43CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ43CA-M3/57T.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,457
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Product details
Overview
SMCJ43CA-M3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection on signal and power lines. 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 in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMCJ43CA-M3/57T datasheet, SMCJ43CA-M3/57T pinout, SMCJ43CA-M3/57T application, or SMCJ43CA-M3/57T equivalent, key selection criteria include bidirectional clamping symmetry, low incremental surge resistance, AEC-Q101 qualification eligibility (via HM3 suffix), and compatibility with automated SMT placement on 8 mm × 8 mm copper pads.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging an avalanche breakdown mechanism to shunt surge energy away from downstream circuitry. Its bidirectional structure ensures symmetrical clamping in both polarities, with breakdown voltage (VBR) specified between 47.8 V and 52.8 V at 1 mA test current - critical for precision overvoltage thresholding in dual-rail systems.
Thermal performance is defined by RθJA = 75 °C/W (junction-to-ambient, on recommended pad layout) and RθJL = 15 °C/W (junction-to-lead), enabling reliable operation up to TJ = 150 °C. The glass-passivated junction and halogen-free M3 construction meet JESD201 Class 2 whisker resistance and UL 94 V-0 flammability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before leakage exceeds 1 µA; defines safe working margin below clamping onset. |
| VC @ IPPM | 69.4 V - Clamped voltage at 21.6 A peak pulse current (10/1000 µs); determines worst-case stress on protected IC inputs. |
| PPPM | 1500 W - Peak pulse power handling capability; supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) surge immunity when properly laid out. |
| VBR min/max | 47.8 V / 52.8 V - Breakdown voltage range at 1 mA; ensures consistent turn-on across production lots and temperature. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments without derating. |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with standard SMT reflow profiles. |
Pinout & Package
SMCJ43CA-M3/57T uses a 2-terminal SMC (DO-214AB) package with no polarity marking - consistent with bidirectional functionality. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge return path (bidirectional) | Functions identically to cathode under reverse polarity; forms symmetrical clamping path with other terminal. |
| Cathode | Surge return path (bidirectional) | No functional distinction from anode; both terminals serve as interchangeable surge conduction paths. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| 1500 W peak pulse power | Supports robust IEC 61000-4-5 surge testing up to 4 kV open-circuit voltage with 2 Ω source impedance. |
| Low clamping ratio (VC/VWM = 1.61) | Minimizes voltage overshoot during transients, reducing risk of latch-up or gate oxide damage in protected MOSFETs/ICs. |
| Halogen-free, RoHS-compliant (M3) | Fulfills environmental compliance for automotive and industrial end equipment without compromising surge performance. |
| MSL Level 1 (260 °C peak) | Permits standard lead-free reflow assembly without moisture sensitivity limitations or baking requirements. |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and MEMS pressure sensors from load dump and ESD events in engine control units. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector entry point to divert surge energy before reaching signal conditioning circuitry. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 5a (75 V/350 ms) while surviving >1000 surges due to low incremental resistance. | Use Scenario: Shielding 4–20 mA current loop inputs in programmable logic controllers against field wiring transients and lightning-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage protection element across input terminals, coordinated with series current-limiting resistor and optional gas discharge tube. Use Value: Clamps to ≤69.4 V within <1 ns, preventing op-amp saturation and ADC input damage during 1 kV/500 A surge events. |
| Telecom Line Card Protection | Consumer USB Port ESD Suppression |
Use Scenario: Safeguarding Ethernet PHY interfaces and PoE injectors in enterprise switches against induced surges from nearby AC mains or antenna coupling. IC Role / Device Role / Timing Role: Secondary surge suppression stage following primary GDT or polymer PTC, absorbing residual energy after front-end clipping. Use Value: Delivers 1500 W pulse handling with <0.5 pF junction capacitance (at 0 V), preserving 100BASE-TX signal integrity. | Use Scenario: Hardening USB 2.0 data lines (D+/D−) in smart home hubs against human-body-model (HBM) ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed adjacent to USB connector to clamp ±15 kV contact discharge per IEC 61000-4-2. Use Value: Achieves sub-1 ns response with clamping voltage <12 V at 1 A, preventing PHY reset or enumeration failure during ESD events. |
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) | Limited to lower-energy surges (IEC 61000-4-2 only); unsuitable for IEC 61000-4-5 Level 3+ | Select when board space is constrained and surge threat level is limited to ESD and low-energy switching noise. |
| SMCJ43CA-E3/57T | Same electrical specs; RoHS-compliant but not halogen-free; commercial-grade (non-AEC-Q101 eligible) | Acceptable for non-automotive industrial use where halogen-free mandate does not apply | Choose for cost-sensitive commercial designs where M3 environmental compliance is not required. |
Compared with SAC43CA and SMCJ43CA-E3/57T, the SMCJ43CA-M3/57T uniquely combines 1500 W surge capacity, halogen-free construction, and AEC-Q101 qualification pathway - making it the only option qualified for under-hood automotive deployment requiring both high energy handling and strict material compliance.
Availability
SMCJ43CA-M3/57T is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O hardening, telecom line card surge suppression, and consumer USB port ESD mitigation requiring stable component supply across multi-year production cycles.
Supply support for SMCJ43CA-M3/57T 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, power efficiency, and automotive-grade qualification.
The SMCJ series targets high-energy transient suppression in harsh environments, with design focus on automotive, industrial, and telecom infrastructure applications demanding AEC-Q101 readiness and robust surge immunity.
FAQ
What is the clamping voltage of SMCJ43CA-M3/57T at its rated peak pulse current?
The SMCJ43CA-M3/57T has a maximum clamping voltage (VC) of 69.4 V at 21.6 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured with the device mounted on 8.0 mm × 8.0 mm copper pads per terminal, and represents the upper limit of voltage seen by protected circuitry during a full-rated surge event. The SMCJ43CA-M3/57T maintains this clamping performance across its operational temperature range of -55 °C to +150 °C.
Is SMCJ43CA-M3/57T suitable for automotive applications?
Yes, SMCJ43CA-M3/57T is built to support automotive qualification: its base P/N-M3 suffix denotes halogen-free, RoHS-compliant construction, and the part belongs to the AEC-Q101-qualified SMCJ family (via HM3 ordering code variants). While SMCJ43CA-M3/57T itself is commercial-grade, it shares identical electrical and thermal characteristics with AEC-Q101 versions - enabling direct qualification path for automotive sensor modules, body control units, and infotainment interfaces. The SMCJ43CA-M3/57T meets MSL Level 1 and JESD201 Class 2 whisker resistance requirements essential for automotive manufacturing.
How does the bidirectional configuration of SMCJ43CA-M3/57T affect its PCB layout?
The bidirectional configuration of SMCJ43CA-M3/57T eliminates polarity marking and allows symmetric placement across differential or AC-coupled signal paths - no orientation check is needed during automated placement. Layout requires two equal 8.0 mm × 8.0 mm copper pads (per Vishay's recommended footprint), with no ground plane restriction beneath the device. Unlike unidirectional TVS diodes, SMCJ43CA-M3/57T does not require cathode alignment relative to system ground, simplifying routing for balanced lines such as RS-485 or CAN FD. The SMCJ43CA-M3/57T achieves this via symmetrical avalanche junction design, verified by identical VBR and VC in both directions.
What is the thermal resistance of SMCJ43CA-M3/57T, and how does it impact power dissipation?
The SMCJ43CA-M3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on minimum recommended pad layout, and junction-to-lead resistance (RθJL) of 15 °C/W. These values define steady-state power limits: at 25 °C ambient, the device sustains 6.5 W continuous dissipation (PD), but must be derated linearly above 25 °C - reaching zero allowable power at 150 °C junction temperature. For surge conditions, thermal mass dominates; the SMCJ43CA-M3/57T handles 1500 W pulses because energy is dissipated in microseconds, not steady state. Proper pad sizing is essential to maintain these Rθ values in actual designs.
Does SMCJ43CA-M3/57T have any special handling or packaging requirements?
SMCJ43CA-M3/57T is supplied in 7-inch plastic tape-and-reel format (57T code), with 850 units per reel, and complies with MSL Level 1 per J-STD-020 - meaning it can be exposed to ambient conditions indefinitely without baking prior to reflow. Its matte tin-plated leads meet J-STD-002 and JESD22-B102 solderability standards, and the halogen-free M3 construction satisfies IPC-1752 material declaration requirements. No special ESD handling beyond standard Class 1A protocols is required, as the SMCJ43CA-M3/57T is not ESD-sensitive (HBM > 8 kV inherent to TVS structure).
SMCJ43CA-M3/57T 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 (SMC)
SMCJ43CA-M3/57T FAQ
1.How can I place an order for SMCJ43CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ43CA-M3/57T 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-M3/57T reliable?
The price and inventory of SMCJ43CA-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ43CA-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ43CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ43CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ43CA-M3/57T?
SMCJ43CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ43CA-M3/57T 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-M3/57T?
For technical support, including SMCJ43CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ43CA-M3/57T requirements.
6.How does Aetrix verify that SMCJ43CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ43CA-M3/57T 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-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ43CA-M3/57T?
All SMCJ43CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ43CA-M3/57T, 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-M3/57T part is unused and in its original packaging.
Return procedure for SMCJ43CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ43CA-M3/57T Tags
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