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Vishay General Semiconductor - Diodes Division SMCJ43A-E3/57T
- Part No.:
- SMCJ43A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ43A-E3/57T.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,833
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Product details
Overview
SMCJ43A-E3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 43 V stand-off voltage (VWM), 47.8–52.8 V breakdown voltage (VBR), 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 - deployed in automotive power supply inputs and industrial sensor interfaces.
For engineers reviewing the SMCJ43A-E3/57T datasheet, SMCJ43A-E3/57T pinout, SMCJ43A-E3/57T application, or SMCJ43A-E3/57T equivalent, key selection criteria include clamping performance under 21.6 A surge, thermal resistance (RθJA = 75 °C/W), unidirectional polarity marking, RoHS-compliant matte tin plating, and AEC-Q101 qualification eligibility via HE3 suffix variants.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse-biased voltage exceeds VBR (47.8–52.8 V), it avalanches to limit transient energy across protected nodes. Its glass-passivated junction ensures stable leakage (<1.0 µA at 43 V) and fast response time (<1 ns), critical for safeguarding MOSFET gates and microcontroller I/O against ESD and inductive switching spikes.
Mounted on 8.0 mm × 8.0 mm copper pads per terminal, it delivers 1500 W peak pulse power handling while maintaining TJ ≤ 150 °C. The SMC (DO-214AB) package supports automated placement and meets MSL level 1 (260 °C reflow peak), with cathode band marking for unidirectional polarity identification.
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 1.0 mA - guaranteed avalanche onset range defining protection threshold |
| VC @ IPPM | 69.4 V at 21.6 A - clamped voltage during 10/1000 µs surge, limiting stress on downstream ICs |
| PPPM | 1500 W - peak transient power dissipation capability without failure |
| ID @ VWM | ≤1.0 µA - ultra-low reverse leakage preserves system efficiency in standby |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, guiding heatsinking requirements |
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 identified by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when V > VBR |
| 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 VC control during high-current transients, reducing voltage overshoot on protected nodes |
| Glass passivated chip junction | Ensures long-term reliability and stable VBR drift under thermal cycling and humidity exposure |
| MSL Level 1 compliance | Supports standard SMT reflow profiles up to 260 °C peak without moisture-induced damage |
| AEC-Q101 qualification option | HE3/HM3 variants available for automotive-grade deployment in engine control and ADAS subsystems |
| UL 94 V-0 molding compound | Provides flame-retardant encapsulation required for safety-critical industrial and transportation systems |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: 12 V battery-fed ECUs exposed to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges above 43 V. Use Value: Limits clamped voltage to 69.4 V during 21.6 A transients, protecting 75 V-rated DC-DC converters and CAN transceivers. | Use Scenario: 4–20 mA current loop interface in PLC analog input modules subject to field wiring ESD. IC Role / Device Role / Timing Role: Shunt protector across signal and return lines to divert ±8 kV contact discharge per IEC 61000-4-2. Use Value: Sub-1 ns response and <1 µA leakage preserve loop accuracy while surviving repeated 1500 W surges. |
| Consumer Device USB Port Surge Guard | Telecom DSL Line Transient Suppression |
Use Scenario: USB VBUS line in portable docking stations subjected to hot-plug inrush and cable coupling transients. IC Role / Device Role / Timing Role: Unidirectional TVS connected anode-to-ground, cathode-to-VBUS to suppress positive-going spikes. Use Value: 43 V VWM avoids false triggering during 5.25 V nominal operation; 69.4 V VC prevents USB PHY latch-up. | Use Scenario: Primary-side protection on ADSL/VDLS line cards interfacing twisted-pair telco lines vulnerable to lightning-induced surges. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices (one per conductor) referenced to common-mode ground. Use Value: 1500 W PPPM rating handles telecom-specified 10/1000 µs surges; DO-214AB footprint enables compact dual-line layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A-E3/52T | Lower PPPM (600 W), smaller SMB (DO-214AA) package, same VWM/VBR/VC specs | Reduced surge margin; suitable only for lower-energy transients (e.g., consumer USB, non-automotive sensors) | Select when board space is constrained and peak surge energy remains ≤600 W |
| SMCJ43CA-E3/57T | Bidirectional variant; identical VWM (43 V), VBR (47.8–52.8 V), VC (69.4 V), but symmetric conduction in both polarities | Required for AC-coupled or differential signal lines where negative transients occur (e.g., RS-485, Ethernet PHY) | Choose for bidirectional protection needs; not interchangeable without circuit review |
Compared with SMCJ43A-E3/57T, SMBJ43A-E3/52T trades surge capacity for compactness, while SMCJ43CA-E3/57T adds polarity symmetry at no clamping penalty - both require explicit validation of layout, grounding, and surge profile alignment.
Availability
SMCJ43A-E3/57T is available at Aetrix Electronics and suitable for automotive power inputs, industrial sensor interfaces, consumer USB ports, and telecom line protection requiring stable component supply and traceable RoHS-compliant sourcing.
Supply support for SMCJ43A-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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, precision, and automotive-grade qualification.
The SMCJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where 1500 W surge immunity and AEC-Q101 readiness are mandatory.
FAQ
What is the maximum clamping voltage of SMCJ43A-E3/57T under a 10/1000 µs surge?
The SMCJ43A-E3/57T has a maximum clamping voltage (VC) of 69.4 V when subjected to its rated peak pulse current of 21.6 A using the standardized 10/1000 µs waveform. This value is measured at the device terminals under specified test conditions (TA = 25 °C, mounted on 8.0 mm × 8.0 mm copper pads) and defines the upper voltage limit imposed on protected circuits during surge events. The SMCJ43A-E3/57T maintains this clamping performance consistently across its operational temperature range.
Is SMCJ43A-E3/57T RoHS-compliant and lead-free?
Yes, the SMCJ43A-E3/57T 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 and JESD 22-B102 solderability standards, and the molding compound satisfies UL 94 V-0 flammability requirements. The SMCJ43A-E3/57T is certified to JESD 201 Class 2 for whisker resistance, confirming long-term reliability in lead-free assembly processes.
Does SMCJ43A-E3/57T have AEC-Q101 qualification?
The base SMCJ43A-E3/57T is commercial-grade and not AEC-Q101 qualified; however, Vishay offers the functionally identical SMCJ43A-HE3 variant (with "HE3" suffix) that is fully AEC-Q101 qualified for automotive applications. The HE3 version shares the same electrical characteristics, package, and thermal performance but undergoes additional stress testing per AEC-Q101 standards. For automotive designs requiring qualification, specify SMCJ43A-HE3_X (where X denotes revision code) instead of SMCJ43A-E3/57T.
What is the thermal resistance junction-to-ambient for SMCJ43A-E3/57T?
The SMCJ43A-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the minimum recommended pad layout (0.31" × 0.31" copper pads per terminal). This value assumes natural convection cooling and guides thermal design - for example, at 6.5 W steady-state power dissipation, junction temperature rise would be ~488 °C above ambient, underscoring that the device is intended for transient-only operation. Continuous power handling is limited to 6.5 W at TA = 50 °C.
How is polarity identified on the SMCJ43A-E3/57T package?
The SMCJ43A-E3/57T uses a molded cathode band on the SMC (DO-214AB) case to indicate the cathode terminal; the banded end connects to the protected line, while the opposite (unmarked) end is the anode, typically tied to ground. This unidirectional configuration ensures conduction only during positive transients relative to ground. The band is visible as a distinct circumferential marking and aligns with industry-standard DO-214AB orientation - critical for correct PCB placement to avoid reverse-bias failure during surge events. The SMCJ43A-E3/57T must not be substituted with bidirectional variants (e.g., SMCJ43CA) without verifying circuit polarity requirements.
SMCJ43A-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:
- 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-E3/57T FAQ
1.How can I place an order for SMCJ43A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ43A-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 SMCJ43A-E3/57T reliable?
The price and inventory of SMCJ43A-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 SMCJ43A-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ43A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ43A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ43A-E3/57T?
SMCJ43A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ43A-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 SMCJ43A-E3/57T?
For technical support, including SMCJ43A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ43A-E3/57T requirements.
6.How does Aetrix verify that SMCJ43A-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ43A-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 SMCJ43A-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ43A-E3/57T?
All SMCJ43A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ43A-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 SMCJ43A-E3/57T part is unused and in its original packaging.
Return procedure for SMCJ43A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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