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Vishay General Semiconductor - Diodes Division SMC5K43CA-M3/I
- Part No.:
- SMC5K43CA-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC5K43CA-M3/I.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,699
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Product details
Overview
SMC5K43CA-M3/I from Vishay General Semiconductor is a bidirectional 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. It protects MOSFETs, ICs, and sensor signal lines in automotive and industrial power electronics.
For engineers reviewing the SMC5K43CA-M3/I datasheet, SMC5K43CA-M3/I pinout, SMC5K43CA-M3/I application, or SMC5K43CA-M3/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 175 °C maximum junction temperature, low incremental surge resistance, and compatibility with automated SMT assembly using matte tin-plated leads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector triggered by transient overvoltage events. Its bidirectional structure enables symmetrical clamping across both polarities without polarity marking, and its silicon avalanche junction delivers sub-nanosecond response time to transients induced by inductive switching or lightning surges.
The device is rated for 5000 W peak pulse power under 10/1000 μs waveform and 40 kW under 8/20 μs waveform, with thermal resistance of 90 °C/W (junction-to-ambient) and 4.0 °C/W (junction-to-mount). It meets J-STD-020 MSL Level 1 and passes JESD201 Class 2 whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below circuit rail voltage. |
| VBR min/max | 47.8 V / 52.8 V - Breakdown voltage range at 1 mA test current; ensures reliable turn-on within defined tolerance band. |
| VC @ IPPM | 69.4 V at 72.0 A - Clamping voltage during 10/1000 μs surge; determines maximum stress imposed on protected downstream components. |
| PPPM | 5000 W - Peak pulse power handling capacity under standard 10/1000 μs waveform; quantifies single-event energy absorption capability. |
| TJ max | +175 °C - Maximum junction temperature rating; supports operation in under-hood automotive and high-temperature industrial environments. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 7.11 mm × 6.22 mm footprint and 2.06 mm height; compatible with JEDEC-compliant reflow profiles. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD immunity per AEC specification. |
Pinout & Package
SMC5K43CA-M3/I uses a two-terminal SMC (DO-214AB) package with no cathode band due to bidirectional construction. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD22-B102, and meet JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction terminal | No polarity marking required; either terminal serves as input/output depending on transient polarity; enables simplified PCB layout. |
| Cathode/Anode (symmetrical) | Bidirectional avalanche junction terminal | Identical electrical behavior in both directions; eliminates orientation errors during automated placement and reduces BOM complexity. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC-coupled or floating signal paths without polarity constraints; eliminates need for dual-device configurations. |
| 5000 W peak pulse power (10/1000 μs) | Supports robust protection against high-energy transients in 12 V/24 V automotive power nets and industrial motor drive control circuits. |
| AEC-Q101 qualification | Validates suitability for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. |
| MSL Level 1, 260 °C peak reflow | Permits single-pass lead-free reflow assembly without moisture sensitivity concerns; eliminates baking requirement prior to SMT. |
| UL 497B recognition (E136766) | Confirms compliance with safety standards for telecom and industrial equipment surge protection subsystems. |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Lines |
|---|---|
Use Scenario: Protection of 12 V battery-fed ECUs against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed at power entry point to clamp surges before reaching LDOs and microcontrollers. Use Value: Limits voltage excursion to ≤69.4 V during 72 A transients, preventing latch-up or permanent damage to downstream 5 V/3.3 V logic. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF at 0 V) bidirectional clamp on 4–20 mA or 0–10 V output lines exposed to EMI and ground bounce. Use Value: Maintains signal integrity by clamping fast-rising transients while adding negligible loading to precision analog circuits. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Surge suppression on Ethernet PHY interface lines in PoE-powered network switches. IC Role / Device Role / Timing Role: Secondary-level protection after gas discharge tube (GDT), absorbing residual energy from IEC 61000-4-5 8/20 μs surges. Use Value: Delivers 40 kW peak pulse handling (8/20 μs) to ensure survivability under repeated lightning-induced surges up to 10 kA. |
Use Scenario: Protecting gate drivers and bootstrap circuits in BLDC motor inverters used in HVAC and washing machines. IC Role / Device Role / Timing Role: Fast-response clamp across half-bridge high-side and low-side FET source terminals to suppress shoot-through-inducing voltage spikes. Use Value: Sub-nanosecond response prevents false triggering of gate drivers and maintains PWM timing integrity during commutation events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CA-M3/5A | Lower peak pulse power (600 W vs. 5000 W); SMB (DO-214AA) package; same VWM/VC ratings. | Suitable for lower-energy consumer electronics; not rated for automotive load dump or industrial lightning surges. | Select when space-constrained layouts require smaller footprint and surge energy requirements are ≤600 W. |
| SMC5K43CAHM3/I | Identical electrical specs; differs only in qualification level - HM3 suffix denotes full AEC-Q101 compliance (vs. M3's industrial grade). | Required for automotive OEM designs requiring full AEC-Q101 documentation and traceability; otherwise functionally interchangeable. | Choose SMC5K43CAHM3/I for Tier 1 automotive programs; SMC5K43CA-M3/I suffices for industrial or aftermarket applications. |
Compared with SMBJ43CA-M3/5A, SMC5K43CA-M3/I provides tenfold higher surge energy handling and automotive-grade thermal robustness; compared with SMC5K43CAHM3/I, it offers identical protection performance with reduced qualification overhead for non-automotive use cases.
Availability
SMC5K43CA-M3/I is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfacing, telecom line protection, and consumer appliance motor control requiring stable component supply and long-term lifecycle support.
Supply support for SMC5K43CA-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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMC5KxxCA series is part of Vishay's TRANSZORB® TVS portfolio, engineered for high-power transient suppression in harsh environments including automotive, industrial, and telecom infrastructure.
FAQ
What is the clamping voltage of SMC5K43CA-M3/I at its rated peak pulse current?
The SMC5K43CA-M3/I has a maximum clamping voltage (VC) of 69.4 V at 72.0 A peak pulse current under the 10/1000 μs waveform. This value is measured per Figure 3 in the official Vishay datasheet (Document Number: 87024) and defines the upper voltage limit imposed on protected circuitry during surge events. The SMC5K43CA-M3/I maintains this clamping performance across its full operating temperature range.
Is SMC5K43CA-M3/I qualified for automotive applications?
The SMC5K43CA-M3/I carries industrial-grade qualification (M3 suffix) and meets MSL Level 1, J-STD-020, and JESD201 Class 2 whisker testing. While it shares all electrical and thermal specifications with the AEC-Q101-qualified SMC5K43CAHM3/I variant, the SMC5K43CA-M3/I itself is not AEC-Q101 certified. For automotive OEM designs, SMC5K43CAHM3/I is the designated qualified version of the SMC5K43CA-M3/I.
What does the "-M3/I" suffix indicate in SMC5K43CA-M3/I?
The "-M3" suffix denotes halogen-free, RoHS-compliant, industrial-grade construction with matte tin-plated leads meeting J-STD-002 and JESD22-B102 solderability standards. The "/I" indicates packaging in 13-inch diameter plastic tape and reel with a base quantity of 3500 units - optimized for high-volume SMT assembly lines. This packaging format is distinct from the "/H" (7-inch reel, 850 units) option.
How does SMC5K43CA-M3/I compare to unidirectional TVS diodes in circuit design?
The SMC5K43CA-M3/I is bidirectional, meaning it clamps overvoltage transients of either polarity without requiring orientation during placement. Unlike unidirectional TVS diodes that need correct anode/cathode alignment relative to DC bias, the SMC5K43CA-M3/I simplifies layout for AC-coupled, floating, or dual-rail systems. Its symmetrical VBR and VC characteristics eliminate risk of misapplication in bidirectional signal paths.
What is the thermal resistance profile of SMC5K43CA-M3/I?
The SMC5K43CA-M3/I has a junction-to-ambient thermal resistance (RthJA) of 90 °C/W and junction-to-mount thermal resistance (RthJM) of 4.0 °C/W, per JEDEC 51-2A and 51-14 test methods respectively. These values assume standard FR4 PCB mounting with 2 oz. copper and specified pad layout. The low RthJM enables effective heat transfer to heatsink pads or thermal vias, supporting sustained operation at +175 °C maximum junction temperature.
SMC5K43CA-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:
- -
- Bidirectional Channels:
- 1
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMC5K43CA-M3/I FAQ
1.How can I place an order for SMC5K43CA-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC5K43CA-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 SMC5K43CA-M3/I reliable?
The price and inventory of SMC5K43CA-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 SMC5K43CA-M3/I is usually 5 days.
3.What payment methods are accepted for SMC5K43CA-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC5K43CA-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC5K43CA-M3/I?
SMC5K43CA-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC5K43CA-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 SMC5K43CA-M3/I?
For technical support, including SMC5K43CA-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC5K43CA-M3/I requirements.
6.How does Aetrix verify that SMC5K43CA-M3/I is sourced from the original manufacturer or authorized distributors?
All SMC5K43CA-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 SMC5K43CA-M3/I meets industry standards.
7.What is the process for return or replacement of SMC5K43CA-M3/I?
All SMC5K43CA-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMC5K43CA-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 SMC5K43CA-M3/I part is unused and in its original packaging.
Return procedure for SMC5K43CA-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC5K43CA-M3/I Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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