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Vishay General Semiconductor - Diodes Division SMCJ43C-E3/9AT
- Part No.:
- SMCJ43C-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ43C-E3/9AT.pdf
- Description:
- TVS DIODE 43VWM 76.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,143
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Product details
Overview
SMCJ43C-E3/9AT 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 (PPPM) with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial systems.
For engineers reviewing the SMCJ43C-E3/9AT datasheet, SMCJ43C-E3/9AT pinout, SMCJ43C-E3/9AT application, or SMCJ43C-E3/9AT equivalent, key selection criteria include bi-directional clamping capability, AEC-Q101 qualification, low incremental surge resistance, UL 94 V-0 molding compound, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ43C-E3/9AT operates as a bi-directional avalanche diode, symmetrically clamping both positive and negative transients without polarity marking. Its breakdown voltage (VBR) ranges from 47.8 V to 52.8 V at 1 mA test current, with ≤1.0 µA reverse leakage at 43 V stand-off voltage.
It delivers 1500 W peak pulse power handling under standardized 10/1000 µs waveform conditions, derated above 25 °C ambient per thermal curves, and maintains stable clamping performance across -55 °C to +150 °C junction temperature range.
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 - ensures reliable avalanche conduction onset within defined tolerance |
| VC @ IPPM | 69.4 V at 21.6 A - clamped voltage seen by protected circuit during 10/1000 µs surge |
| PPPM | 1500 W - peak transient energy absorption capacity under standard waveform |
| ID @ VWM | ≤1.0 µA - ultra-low leakage preserves signal integrity in high-impedance circuits |
| TJ max | +150 °C - supports operation in under-hood automotive and industrial environments |
| MSL Level | Level 1 (J-STD-020) - no floor life limitation; safe for reflow up to 260 °C peak |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, bi-directional device with no polarity marking - terminals are symmetrical anode/cathode pair; molded case meets UL 94 V-0; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Bi-directional clamping: either terminal serves as cathode or anode depending on transient polarity |
| Case (body) | Thermal and mechanical interface | DO-214AB body transfers heat to PCB copper pads; requires 8.0 mm × 8.0 mm pad per terminal for rated PPPM |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| Glass passivated junction | Enhances long-term stability and moisture resistance vs. epoxy-passivated alternatives |
| Low incremental surge resistance | Enables tighter clamping (VC/VBR ratio = ~1.45) and lower let-through energy |
| MSL Level 1 rating | Eliminates bake requirements prior to reflow; compatible with standard SMT assembly lines |
| UL 94 V-0 molding compound | Meets flame-retardancy requirements for safety-critical industrial and automotive enclosures |
Applications
| Automotive Power Line Protection | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Bi-directional TVS placed across power rail input to clamp ±100 V spikes to <70 V. Use Value: Prevents latch-up or gate oxide damage in downstream DC-DC controllers and microcontrollers. | Use Scenario: Shielding analog output lines of pressure/temperature sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Low-capacitance bi-directional clamp on 4–20 mA or 0–10 V signal paths. Use Value: Maintains signal fidelity while suppressing ESD and inductive switching noise up to 1500 W. |
| Telecom Interface Surge Suppression | Consumer Device USB Port Protection |
Use Scenario: Safeguarding RS-485 transceivers in base station backhaul equipment exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on differential bus lines, coordinated with secondary GDT or polymer PTC. Use Value: Limits transient voltage to <70 V within nanoseconds, preserving data integrity during 10/1000 µs events. | Use Scenario: Adding robustness to USB 2.0 VBUS and D+/D− lines in smart home hubs against user-handling ESD. IC Role / Device Role / Timing Role: Bi-directional clamping element meeting IEC 61000-4-2 Level 4 (±15 kV air) requirements. Use Value: Enables fail-safe operation without signal distortion due to sub-1 µA leakage at 43 V standoff. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC43C | Lower PPPM (600 W), same VWM (43 V), DO-214AA package (smaller thermal mass) | Not AEC-Q101 qualified; limited to commercial-grade consumer/office equipment | Select when cost sensitivity outweighs automotive reliability or surge margin requirements |
| SMCJ43CAHE3/9AT | Identical electrical specs; HE3 suffix denotes AEC-Q101 qualification and enhanced whisker resistance (JESD 201 Class 2) | Same functional use; preferred for automotive OEM designs requiring extended reliability validation | Choose for Tier-1 automotive programs where whisker mitigation and full AEC-Q101 traceability are mandatory |
Compared with SAC43C, SMCJ43C-E3/9AT provides 2.5× higher surge power and automotive qualification; versus SMCJ43CAHE3/9AT, it offers identical protection performance but with JESD 201 Class 1A whisker testing - suitable for most automotive modules except those specifying Class 2.
Availability
SMCJ43C-E3/9AT is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom surge suppression requiring stable component supply and RoHS-compliant sourcing.
Supply support for SMCJ43C-E3/9AT 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 application-specific optimization.
The SMCJ series belongs to Vishay's TRANSZORB® TVS platform, engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure modes must be mitigated without compromising signal integrity.
FAQ
What does the "C" suffix indicate in SMCJ43C-E3/9AT?
The "C" in SMCJ43C-E3/9AT denotes bi-directional configuration - meaning the device clamps transients of either polarity symmetrically, with no cathode band marking. This distinguishes it from uni-directional variants like SMCJ43A-E3/9AT, which require correct polarity orientation during placement. The SMCJ43C-E3/9AT is functionally identical to SMCJ43CA except for packaging suffix conventions.
Is SMCJ43C-E3/9AT RoHS compliant and halogen-free?
Yes, SMCJ43C-E3/9AT is RoHS compliant per Directive 2011/65/EU and conforms to JEDEC JS709A halogen-free standards. The "E3" suffix explicitly indicates commercial-grade RoHS compliance, matte tin plating, and JESD 201 Class 1A whisker resistance - verified in Vishay's material declarations and certified in document #99912.
What is the maximum clamping voltage of SMCJ43C-E3/9AT and under what test condition?
The maximum clamping voltage (VC) of SMCJ43C-E3/9AT is 69.4 V, measured at 21.6 A peak pulse current (IPPM) using the standardized 10/1000 µs double-exponential waveform. This value is guaranteed across the full operating temperature range (-55 °C to +150 °C) and defines the upper voltage limit imposed on protected circuitry during surge events.
Can SMCJ43C-E3/9AT replace SMCJ43A-E3/9AT in an existing design?
No - SMCJ43C-E3/9AT is bi-directional while SMCJ43A-E3/9AT is uni-directional; direct substitution risks incorrect clamping behavior or open-circuit failure if installed without polarity verification. A redesign must confirm whether the application requires bidirectional protection (e.g., AC-coupled lines or floating references) before selecting SMCJ43C-E3/9AT.
Does SMCJ43C-E3/9AT meet AEC-Q101 stress testing requirements?
No - SMCJ43C-E3/9AT carries the "E3" commercial-grade suffix and is not AEC-Q101 qualified. For automotive applications requiring AEC-Q101, specify SMCJ43CAHE3/9AT instead, which includes full qualification testing (HTGB, H3TRB, TC, etc.) and JESD 201 Class 2 whisker resistance. The SMCJ43C-E3/9AT remains suitable for industrial and telecom uses where AEC-Q101 is not mandated.
SMCJ43C-E3/9AT 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-E3/9AT FAQ
1.How can I place an order for SMCJ43C-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ43C-E3/9AT 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-E3/9AT reliable?
The price and inventory of SMCJ43C-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ43C-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ43C-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ43C-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ43C-E3/9AT?
SMCJ43C-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ43C-E3/9AT 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-E3/9AT?
For technical support, including SMCJ43C-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ43C-E3/9AT requirements.
6.How does Aetrix verify that SMCJ43C-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ43C-E3/9AT 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-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ43C-E3/9AT?
All SMCJ43C-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ43C-E3/9AT, 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-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ43C-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ43C-E3/9AT Tags
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