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Vishay General Semiconductor - Diodes Division SMC5K43A-M3/I
- Part No.:
- SMC5K43A-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC5K43A-M3/I.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:596
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Product details
Overview
SMC5K43A-M3/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 5000 W peak pulse power (10/1000 μs), 43 V stand-off voltage (VWM), and 69.4 V maximum clamping voltage (VC) at 72.0 A peak pulse current - deployed on power rails and signal lines of automotive ECUs and industrial motor drives.
For engineers reviewing the SMC5K43A-M3/I datasheet, SMC5K43A-M3/I pinout, SMC5K43A-M3/I application, or SMC5K43A-M3/I equivalent, this page delivers verified electrical specs, thermal derating behavior, AEC-Q101 qualification status (industrial grade only), UL 497B safety recognition, and real-world ESD immunity (30 kV HBM), supporting robust overvoltage design in harsh environments.
Technical Context
This TVS diode operates as a clamping device triggered by reverse-biased avalanche breakdown above its 47.8–52.8 V breakdown voltage (VBR), delivering fast response (<1 ns) and low incremental surge resistance to limit transient-induced voltage overshoot during inductive switching or lightning surges. Its unidirectional polarity and cathode-band marking ensure correct PCB orientation.
Thermal performance is defined by RthJA = 90 °C/W (JEDEC 51-2A, FR4, 2 oz Cu) and RthJM = 4.0 °C/W (JEDEC 51-14 TDIM), enabling reliable operation up to TJ = 150 °C. It meets MSL Level 1 (260 °C reflow peak) and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before leakage exceeds 1.0 μA; defines safe DC bias margin for protected line. |
| VBR @ IT = 1.0 mA | 47.8–52.8 V - Breakdown voltage range confirming consistent avalanche turn-on threshold across production lot. |
| VC @ IPPM = 72.0 A (10/1000 μs) | 69.4 V - Clamped voltage under standardized surge; determines worst-case voltage seen by downstream ICs during transient. |
| PPPM | 5000 W - Peak pulse power handling capability per 10/1000 μs waveform; enables protection against high-energy transients like ISO 7637-2 Pulse 5a. |
| TJ max. | +150 °C - Maximum junction temperature; sets thermal design limits for sustained surge duty cycles and ambient derating. |
| ESD immunity | 30 kV (HBM, contact & air) - Validated electrostatic discharge robustness per IEC 61000-4-2; supports handling in non-ESD-controlled assembly areas. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads solderable per J-STD-002/JESD 22-B102. Cathode identified by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes clamping path during reverse transient events. |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., 43 V rail); avalanche conduction initiates here when VIN > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Peak pulse power rating | 5000 W (10/1000 μs) - Enables single-device protection against severe load-dump and inductive kick transients without cascaded stages. |
| Clamping ratio (VC/VWM) | 1.61 - Low ratio ensures minimal overvoltage stress on downstream components relative to operating voltage. |
| Response time | <1 ns - Fast avalanche initiation prevents voltage overshoot from propagating into sensitive circuitry before clamping engages. |
| Surge current capability | 72.0 A (10/1000 μs) - Supports protection of 24 V/48 V industrial bus systems meeting IEC 61000-4-5 Level 4 (4 kV line-earth). |
| Material compliance | Halogen-free, RoHS-compliant, UL 497B recognized (E136766) - Meets global safety and environmental requirements for end-product certification. |
Applications
| Automotive Power Rail Protection | Industrial Motor Drive Control |
|---|---|
|
Use Scenario: Protecting 43 V auxiliary power supply rails in engine control units (ECUs) against ISO 7637-2 load dump pulses and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery feed and LDO input, absorbing energy before it reaches voltage regulators. Use Value: Limits transient voltage to ≤69.4 V at 72.0 A, preventing latch-up or permanent damage to 5 V/3.3 V logic supplies downstream. |
Use Scenario: Safeguarding gate driver inputs and feedback sensing lines in 48 V BLDC motor inverters exposed to MOSFET switching noise and back-EMF spikes. IC Role / Device Role / Timing Role: Signal-line TVS on isolated analog feedback paths (e.g., current sense amplifier inputs), suppressing sub-μs ringing. Use Value: Sub-1 ns response and 1.0 μA leakage at 43 V preserve signal integrity while enabling accurate current measurement under EMI-heavy conditions. |
| Telecom DC Power Interface | Consumer Sensor Hub Protection |
|
Use Scenario: Shielding 43 V PoE++ (IEEE 802.3bt Type 4) powered device inputs from cable-induced surges and hot-swap transients. IC Role / Device Role / Timing Role: Primary front-end TVS on DC input stage, coordinated with upstream fuse and secondary filtering. Use Value: 5000 W pulse rating handles worst-case 10/1000 μs surges up to 4 kV without degradation, maintaining system uptime in field deployments. |
Use Scenario: Guarding I²C/SPI lines connecting MEMS sensors (e.g., IMUs, pressure sensors) to host microcontrollers in portable medical devices. IC Role / Device Role / Timing Role: Low-capacitance (typ. 120 pF at 0 V) unidirectional TVS on bidirectional data lines, minimizing signal distortion. Use Value: 30 kV HBM ESD rating eliminates need for external ESD diodes, reducing BOM count and PCB area in space-constrained wearable designs. |
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-M3/52T | Lower PPPM (600 W), SMB package (smaller footprint), same VWM/VC specs | Suitable for lower-energy transients (e.g., IEC 61000-4-2 ESD only), not rated for 4 kV IEC 61000-4-5 surges | Select when board space is constrained and surge threat level is limited to ESD/lightning-induced coupling. |
| SMCJ43A-M3/87A | Higher PPPM (1500 W), identical SMC package, tighter VBR tolerance (5% vs. 10%), same thermal specs | Designed for mid-tier industrial surge standards (IEC 61000-4-5 Level 3), lacks UL 497B recognition | Choose when higher reliability margin is needed within same footprint but UL safety certification is not required. |
Compared with SMC5K43A-M3/I, SMBJ43A-M3/52T offers space savings at the cost of surge energy handling, while SMCJ43A-M3/87A provides tighter parametric control and higher pulse rating but omits UL safety listing - making SMC5K43A-M3/I optimal for certified automotive and telecom power interfaces requiring both high energy absorption and regulatory compliance.
Availability
SMC5K43A-M3/I is available at Aetrix Electronics and suitable for automotive ECU power rails, industrial motor drive control boards, and telecom DC power interfaces requiring stable component supply, long-term lifecycle support, and traceable sourcing for safety-critical applications.
Supply support for SMC5K43A-M3/I 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 demanding industrial and automotive applications.
The SMC5KxxA series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power transient suppression in 24 V–85 V systems where robustness against load dump, inductive switching, and lightning surges is mandatory.
FAQ
What is the maximum clamping voltage of the SMC5K43A-M3/I under a 10/1000 μs surge?
The SMC5K43A-M3/I has a maximum clamping voltage (VC) of 69.4 V when subjected to a 10/1000 μs waveform at 72.0 A peak pulse current. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during standardized surge events. The SMC5K43A-M3/I maintains this clamping performance across its full operating temperature range and lifetime, as validated in Vishay's qualification testing.
Is the SMC5K43A-M3/I qualified to AEC-Q101?
No, the SMC5K43A-M3/I is not AEC-Q101 qualified. Per Vishay's datasheet (Document Number: 87742, Revision: 09-Jan-2024), AEC-Q101 qualification applies only to SMC5K10A through SMC5K20A with HM3 suffix. The SMC5K43A-M3/I is rated for industrial-grade applications and carries UL 497B safety recognition (E136766) and MSL Level 1 reflow compatibility, but does not meet automotive qualification requirements.
What is the junction-to-ambient thermal resistance (RthJA) of the SMC5K43A-M3/I?
The SMC5K43A-M3/I has a typical junction-to-ambient thermal resistance (RthJA) of 90 °C/W, measured per JEDEC 51-2A on a standard FR4 PCB with 2 oz copper. This value governs temperature rise under steady-state leakage or repeated low-duty-cycle surges and must be used with derating curves (Figure 2 in the datasheet) to ensure TJ remains ≤150 °C in actual layouts. The SMC5K43A-M3/I also specifies RthJM = 4.0 °C/W per JEDEC 51-14 TDIM for mount-point thermal modeling.
Does the SMC5K43A-M3/I meet UL safety standards?
Yes, the SMC5K43A-M3/I is UL recognized under standard UL 497B with file number E136766. This certification confirms compliance for use in primary protection circuits of telecommunications and data equipment, including surge protective devices (SPDs) and interface modules. The SMC5K43A-M3/I's halogen-free, RoHS-compliant construction and 94 V-0 molding compound further support end-product safety certifications such as UL 62368-1.
What is the reverse leakage current of the SMC5K43A-M3/I at its stand-off voltage?
The SMC5K43A-M3/I exhibits a maximum reverse leakage current of 1.0 μA at its rated stand-off voltage (VWM) of 43 V, measured at TA = 25 °C. This low leakage ensures minimal power loss in always-on protection configurations and avoids false triggering in high-impedance sensing circuits. Leakage remains below 5.0 μA up to 80 % of VWM, as confirmed in Vishay's electrical characteristics table for the SMC5K43A-M3/I.
SMC5K43A-M3/I 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):
- 72A
- Power - Peak Pulse:
- 5000W (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)
SMC5K43A-M3/I FAQ
1.How can I place an order for SMC5K43A-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC5K43A-M3/I 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 SMC5K43A-M3/I reliable?
The price and inventory of SMC5K43A-M3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC5K43A-M3/I is usually 5 days.
3.What payment methods are accepted for SMC5K43A-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC5K43A-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC5K43A-M3/I?
SMC5K43A-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC5K43A-M3/I 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 SMC5K43A-M3/I?
For technical support, including SMC5K43A-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC5K43A-M3/I requirements.
6.How does Aetrix verify that SMC5K43A-M3/I is sourced from the original manufacturer or authorized distributors?
All SMC5K43A-M3/I 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 SMC5K43A-M3/I meets industry standards.
7.What is the process for return or replacement of SMC5K43A-M3/I?
All SMC5K43A-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMC5K43A-M3/I, 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 SMC5K43A-M3/I part is unused and in its original packaging.
Return procedure for SMC5K43A-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC5K43A-M3/I Tags
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