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Vishay General Semiconductor - Diodes Division SMCJ43A-E3/9AT
- Part No.:
- SMCJ43A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ43A-E3/9AT.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,457
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Product details
Overview
SMCJ43A-E3/9AT from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients up to 1500 W peak pulse power with 69.4 V clamping voltage at 21.6 A peak pulse current and 43 V stand-off voltage. It protects MOSFETs, ICs, and sensor signal lines in automotive and industrial power electronics.
For engineers reviewing the SMCJ43A-E3/9AT datasheet, SMCJ43A-E3/9AT pinout, SMCJ43A-E3/9AT application, or SMCJ43A-E3/9AT equivalent, key selection criteria include unidirectional polarity, 47.8–52.8 V breakdown range at 1 mA, 1.0 μA max reverse leakage at 43 V, 75 °C/W junction-to-ambient thermal resistance, and RoHS-compliant matte tin-plated leads suitable for automated placement.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive circuit nodes, activating when reverse voltage exceeds its breakdown threshold to divert surge current away from protected components. Its glass-passivated junction ensures stable performance under repetitive transients, and it meets MSL Level 1 per J-STD-020 with 260 °C reflow peak tolerance.
The device delivers 1500 W peak pulse power handling (10/1000 μs waveform), supports 200 A non-repetitive forward surge current (8.3 ms half-sine), and maintains operation across -55 °C to +150 °C junction temperature range - critical for under-hood automotive and industrial motor drive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 43 V - maximum continuous reverse operating voltage before clamping begins |
| Breakdown Voltage (VBR) | 47.8–52.8 V at 1 mA - precise voltage threshold where avalanche conduction initiates |
| Clamping Voltage (VC) | 69.4 V at 21.6 A IPPM - maximum voltage seen by protected circuit during 10/1000 μs surge |
| Peak Pulse Power (PPPM) | 1500 W - surge energy handling capability under standardized 10/1000 μs waveform |
| Reverse Leakage (ID) | 1.0 μA max at 43 V - minimal parasitic loading on signal or power rail at rated VWM |
| Junction Temp Range | -55 °C to +150 °C - enables deployment in engine control units and industrial PLCs |
| Thermal Resistance (RθJA) | 75 °C/W - defines temperature rise above ambient under 6.5 W steady-state dissipation |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink node | Connected to protected line; conducts avalanche current to ground during overvoltage event |
| Anode | Reference/return path | Typically tied to system ground or low-impedance return plane for effective clamping |
Key Features
| Feature | Design Value |
|---|---|
| Low incremental surge resistance | Enables tighter clamping voltage control under high-current transients, reducing stress on downstream ICs |
| Glass passivated chip junction | Ensures long-term reliability and stable VBR over temperature and lifetime cycling |
| MSL Level 1 rating | Supports standard SMT reflow without moisture-related popcorning, eliminating bake requirements |
| AEC-Q101 qualification option | HE3/HM3 variants available for automotive applications requiring validated reliability testing |
| UL 94 V-0 molding compound | Meets flammability safety standards for enclosed industrial and automotive enclosures |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive IGBT Gate Protection |
|---|---|
Use Scenario: Protects microcontroller I/O and CAN transceiver inputs from load dump and inductive switching spikes in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp transients before they reach sensitive logic inputs. Use Value: Limits voltage excursion to ≤69.4 V during 1500 W surges, preventing latch-up or gate oxide damage in 5 V/3.3 V interface ICs. |
Use Scenario: Shields IGBT gate driver outputs from Miller-induced voltage spikes during high-dI/dt switching in variable frequency drives. IC Role / Device Role / Timing Role: Fast-response clamping diode mounted directly at gate driver output to suppress >100 V ringing. Use Value: Sub-1 ns response time and 69.4 V clamping ensure gate-source voltage stays within ±20 V absolute maximum rating of discrete IGBTs. |
| Telecom Power Supply Input Stage | Consumer Appliance Mainboard ESD Protection |
Use Scenario: Safeguards AC-DC converter primary-side controller ICs against lightning-induced surges on 48 V telecom power feeds. IC Role / Device Role / Timing Role: Primary-side TVS connected across bulk capacitor input to absorb line-to-line and line-to-ground transients. Use Value: 1500 W PPPM rating handles IEC 61000-4-5 Level 4 (4 kV) surges without degradation after repeated events. |
Use Scenario: Guards USB, HDMI, and front-panel button traces on washing machine or HVAC mainboards against user-handling ESD. IC Role / Device Role / Timing Role: Point-of-entry protection on external-facing connectors, shunting ESD current to chassis ground. Use Value: 1.0 μA leakage at 43 V avoids signal integrity issues on high-impedance sensor and communication lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC43A-E3/9AT | Same VWM (43 V) and VC (69.4 V), but lower PPPM (600 W) and smaller SOD-123FL package | Lower power handling limits use to sub-100 W surge environments; not suitable for load dump or lightning protection | Select only when board space is constrained and surge energy is limited to <600 W |
| SMCJ43CA-E3/9AT | Bidirectional variant with identical VWM (43 V), VC (69.4 V), and PPPM (1500 W), but symmetric clamping in both polarities | Required for AC-coupled or floating signal lines where polarity reversal may occur (e.g., RS-485, audio lines) | Choose when protecting bidirectional interfaces; otherwise unidirectional SMCJ43A-E3/9AT offers lower cost and simpler layout |
Compared with SAC43A-E3/9AT and SMCJ43CA-E3/9AT, the SMCJ43A-E3/9AT provides optimal balance of high-energy clamping, unidirectional efficiency, and SMC package robustness for DC power rail and signal line protection in space-tolerant designs.
Availability
SMCJ43A-E3/9AT is available at Aetrix Electronics and suitable for automotive ECUs, industrial motor drives, telecom power supplies, and consumer appliance mainboards requiring stable component supply and full traceability.
Supply support for SMCJ43A-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, precision, and application-specific optimization.
The SMCJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure due to voltage surges must be eliminated.
FAQ
What is the breakdown voltage range of the SMCJ43A-E3/9AT?
The SMCJ43A-E3/9AT has a guaranteed breakdown voltage (VBR) range of 47.8 V to 52.8 V at 1 mA test current, measured per ANSI/IEEE C62.35. This tight tolerance ensures consistent clamping behavior across production lots and supports reliable design margining in 43 V nominal systems. The SMCJ43A-E3/9AT's VBR is verified during 100% production testing.
Is the SMCJ43A-E3/9AT RoHS-compliant and lead-free?
Yes, the SMCJ43A-E3/9AT carries the "E3" suffix, indicating full RoHS compliance and lead-free construction per EU Directive 2011/65/EU. Its matte tin-plated leads meet J-STD-002 solderability requirements and JESD 201 Class 2 whisker resistance. The SMCJ43A-E3/9AT is also halogen-free and complies with Vishay's material categorization standard (doc?99912).
Can the SMCJ43A-E3/9AT be used in automotive applications?
The base SMCJ43A-E3/9AT is commercial-grade, but Vishay offers AEC-Q101 qualified versions under ordering codes SMCJ43AHE3_X (RoHS + AEC-Q101) and SMCJ43AHM3_X (halogen-free + AEC-Q101). For automotive under-hood or body-control modules, those HE3/HM3 variants are required; the SMCJ43A-E3/9AT itself is not AEC-Q101 certified.
What is the maximum clamping voltage of the SMCJ43A-E3/9AT at rated surge current?
The SMCJ43A-E3/9AT clamps to a maximum of 69.4 V when subjected to its rated peak pulse current (IPPM) of 21.6 A under the standard 10/1000 μs waveform. This value is measured at TJ = 25 °C and reflects worst-case device behavior across process variation - critical for verifying that protected ICs remain within their absolute maximum voltage ratings during surge events. The SMCJ43A-E3/9AT achieves this with low incremental resistance.
How does the SMCJ43A-E3/9AT differ from the bidirectional SMCJ43CA-E3/9AT?
The SMCJ43A-E3/9AT is unidirectional (cathode-banded), providing clamping only for reverse-polarity transients, while the SMCJ43CA-E3/9AT is bidirectional with symmetrical clamping in both directions and no polarity marking. Both share identical VWM (43 V), VC (69.4 V), and PPPM (1500 W), but the SMCJ43A-E3/9AT offers lower capacitance and simpler grounding in DC-coupled circuits. Use the SMCJ43A-E3/9AT for power rails and single-ended signals; choose SMCJ43CA-E3/9AT for AC or floating differential lines.
SMCJ43A-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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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)
SMCJ43A-E3/9AT FAQ
1.How can I place an order for SMCJ43A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ43A-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 SMCJ43A-E3/9AT reliable?
The price and inventory of SMCJ43A-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 SMCJ43A-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ43A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ43A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ43A-E3/9AT?
SMCJ43A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ43A-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 SMCJ43A-E3/9AT?
For technical support, including SMCJ43A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ43A-E3/9AT requirements.
6.How does Aetrix verify that SMCJ43A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ43A-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 SMCJ43A-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ43A-E3/9AT?
All SMCJ43A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ43A-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 SMCJ43A-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ43A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ43A-E3/9AT Tags
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