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Vishay General Semiconductor - Diodes Division SMCJ43C-E3/57T
- Part No.:
- SMCJ43C-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ43C-E3/57T.pdf
- Description:
- TVS DIODE 43VWM 76.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,955
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Product details
Overview
SMCJ43C-E3/57T from Vishay 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 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 (PPPM) with 10/1000 µs waveform - used to protect automotive sensor interfaces and industrial I/O circuits against ESD and load dump.
For engineers reviewing the SMCJ43C-E3/57T datasheet, SMCJ43C-E3/57T pinout, SMCJ43C-E3/57T application, or SMCJ43C-E3/57T equivalent, key selection criteria include bi-directional clamping capability, AEC-Q101 qualification, RoHS-compliant matte tin terminations, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ43C-E3/57T operates as a bi-directional avalanche diode with symmetrical breakdown characteristics in both polarities, enabling protection of AC-coupled or floating signal paths without polarity sensitivity. Its glass-passivated junction ensures stable leakage performance and fast response (<1 ns) to transients such as ISO 7637-2 pulses or IEC 61000-4-5 surges.
Thermally, it exhibits RθJA = 75 °C/W (typ.) and RθJL = 15 °C/W (typ.), supporting operation from –55 °C to +150 °C junction temperature. The device is rated for 200 A non-repetitive forward surge (IFSM) only in uni-directional variants - not applicable to SMCJ43C-E3/57T due to its bi-directional construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 47.8 V / 52.8 V at 1 mA - guaranteed breakdown threshold range for reliable turn-on margin |
| VC @ IPPM | 69.4 V at 21.6 A - clamped voltage during 10/1000 µs surge, defining protected circuit's max stress level |
| PPPM | 1500 W - peak transient energy absorption capacity under standardized surge waveform |
| ID @ VWM | 1.0 µA - ultra-low leakage ensuring minimal impact on high-impedance sensor or communication lines |
| Package | DO-214AB (SMCJ) - surface-mount outline with J-bend leads, MSL Level 1, 260 °C reflow compatible |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
SMCJ43C-E3/57T uses the DO-214AB (SMCJ) package: a surface-mount, bi-directional TVS diode with two terminals in a symmetrical J-bend lead configuration. No polarity marking is present, consistent with bi-directional functionality.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically - bidirectional clamping allows connection across any two points needing overvoltage protection |
| Case (non-connected) | Thermal interface | Exposed metal frame provides thermal path to PCB copper; no electrical isolation required |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables protection of AC, differential, or floating lines without polarity constraints or external biasing |
| Glass-passivated junction | Ensures long-term stability of breakdown voltage and leakage under thermal/humidity stress |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving protection margin for downstream ICs |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow without baking, simplifying manufacturing logistics |
| Matte tin plating | Guarantees solderability per J-STD-002 and whisker resistance per JESD 201 Class 1A |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting ABS wheel speed sensors exposed to load-dump transients and alternator ripple in 12 V vehicle systems. IC Role / Device Role / Timing Role: Standoff-clamp TVS placed across sensor output lines to shunt >43 V spikes before reaching analog front-end or microcontroller input. Use Value: Prevents latch-up or permanent damage to precision amplifiers by limiting voltage to ≤69.4 V during 1500 W surges. | Use Scenario: Safeguarding CAN transceivers (e.g., TJA1042) on factory-floor machinery subject to EFT and surge coupling from motor drives. IC Role / Device Role / Timing Role: Bi-directional clamping element between CAN_H and CAN_L lines to suppress common-mode transients without disrupting differential signaling. Use Value: Maintains signal integrity during 10/1000 µs surges up to 21.6 A while adding <1.0 µA leakage at 43 V standby. |
| Consumer Audio Line Protection | Telecom DSL Line Interface |
Use Scenario: Shielding line-in/out jacks of smart speakers from ESD events during user handling or cable hot-plug. IC Role / Device Role / Timing Role: Fast-response TVS connected between audio signal pair and ground to clamp ±8 kV contact discharge per IEC 61000-4-2. Use Value: Limits transient voltage to ≤69.4 V within <1 ns, preventing pop-noise-induced amplifier saturation or DAC damage. | Use Scenario: Protecting ADSL/VDSL line drivers and receivers in residential gateways from lightning-induced surges on twisted-pair telephone lines. IC Role / Device Role / Timing Role: Bi-directional suppressor bridging tip/ring conductors to absorb longitudinal mode surges up to 1500 W. Use Value: Enables compliance with ITU-T K.20/21/45 immunity requirements while maintaining low capacitance and signal attenuation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC43CA | Lower PPPM (400 W), smaller DO-214AC (SMA) package, same VWM and VC | Suitable for lower-energy transients; limited thermal mass reduces surge handling in repeated events | Select when board space is constrained and peak surge energy remains below 400 W |
| 1.5KE43CA | Through-hole TO-218 package, identical VWM/VC/PPPM but higher RθJA (not specified, typically >100 °C/W) | Requires wave soldering or hand assembly; less suitable for high-density SMT designs | Choose for legacy through-hole systems or where manual repairability is prioritized over automation |
Compared with SAC43CA and 1.5KE43CA, the SMCJ43C-E3/57T delivers superior thermal performance (RθJA = 75 °C/W), AEC-Q101 qualification, and optimized SMT manufacturability - making it the preferred choice for automotive and industrial surface-mount applications demanding repeatable 1500 W surge resilience.
Availability
SMCJ43C-E3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, and telecom line protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMCJ43C-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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The SMCJ series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for robust, standardized transient suppression in harsh environments - emphasizing AEC-Q101 qualification, low clamping ratio, and automated assembly readiness.
FAQ
What does the "C" suffix indicate in SMCJ43C-E3/57T?
The "C" in SMCJ43C-E3/57T denotes bi-directional functionality - meaning the device clamps voltage transients equally in both polarities. Unlike uni-directional variants (e.g., SMCJ43A), the SMCJ43C-E3/57T has no cathode band marking and is used where polarity is undefined or alternating, such as across differential signal pairs or AC-coupled lines. This makes SMCJ43C-E3/57T ideal for protecting balanced interfaces like CAN or RS-485.
Is SMCJ43C-E3/57T RoHS compliant and lead-free?
Yes, SMCJ43C-E3/57T is RoHS compliant and lead-free. The "E3" suffix explicitly indicates Vishay's commercial-grade, RoHS-compliant construction with matte tin-plated leads meeting J-STD-002 solderability and JESD 201 Class 1A whisker resistance requirements. It is not AEC-Q101 qualified - that designation requires the "HE3" suffix (e.g., SMCJ43CHE3/57T). All SMCJ43C-E3/57T units shipped by Aetrix Electronics carry full material declarations and RoHS certification.
What is the maximum clamping voltage of SMCJ43C-E3/57T and how is it measured?
The maximum clamping voltage (VC) of SMCJ43C-E3/57T is 69.4 V, measured at 21.6 A peak pulse current (IPPM) using a 10/1000 µs double-exponential surge waveform per ANSI/IEEE C62.35. This value represents the highest voltage the device allows to pass through during a standardized transient event - critical for ensuring downstream components (e.g., microcontrollers or transceivers) remain within their absolute maximum ratings. VC is verified at TA = 25 °C on 8.0 mm × 8.0 mm copper pads per datasheet conditions.
Can SMCJ43C-E3/57T be used in place of a uni-directional TVS like SMCJ43A?
No - SMCJ43C-E3/57T is not a direct replacement for uni-directional SMCJ43A. While both share the same VWM (43 V) and PPPM (1500 W), the SMCJ43C-E3/57T lacks polarity marking and conducts symmetrically, whereas SMCJ43A has a defined cathode band and blocks reverse current until breakdown. Substituting SMCJ43C-E3/57T in a DC-biased circuit may cause unintended conduction. Use SMCJ43C-E3/57T only where true bi-directional clamping is required, such as across AC signals or floating differential lines.
What is the thermal resistance and maximum operating temperature of SMCJ43C-E3/57T?
SMCJ43C-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead resistance (RθJL) of 15 °C/W, measured on standard 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads. Its operating junction temperature range is –55 °C to +150 °C, with storage temperature matching this span. These values enable reliable operation in under-hood automotive or industrial control cabinet environments, provided PCB layout adheres to recommended pad dimensions and avoids excessive local heating near the SMCJ43C-E3/57T location.
SMCJ43C-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 76.7V
- Current - Peak Pulse (10/1000µs):
- 19.6A
- 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)
SMCJ43C-E3/57T FAQ
1.How can I place an order for SMCJ43C-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ43C-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 SMCJ43C-E3/57T reliable?
The price and inventory of SMCJ43C-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 SMCJ43C-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ43C-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ43C-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ43C-E3/57T?
SMCJ43C-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ43C-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 SMCJ43C-E3/57T?
For technical support, including SMCJ43C-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ43C-E3/57T requirements.
6.How does Aetrix verify that SMCJ43C-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ43C-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 SMCJ43C-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ43C-E3/57T?
All SMCJ43C-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ43C-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 SMCJ43C-E3/57T part is unused and in its original packaging.
Return procedure for SMCJ43C-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ43C-E3/57T Tags
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