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Vishay General Semiconductor - Diodes Division SMC5K43CA-M3/H
- Part No.:
- SMC5K43CA-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC5K43CA-M3/H.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,100
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Product details
Overview
SMC5K43CA-M3/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 43 V stand-off voltage (VWM), 47.8–52.8 V breakdown voltage (VBR) at 1 mA, 69.4 V clamping voltage (VC) at 72.0 A (10/1000 μs), and 5000 W peak pulse power rating - deployed in automotive power line and industrial sensor interface protection.
For engineers reviewing the SMC5K43CA-M3/H datasheet, SMC5K43CA-M3/H pinout, SMC5K43CA-M3/H application, or SMC5K43CA-M3/H equivalent, key selection criteria include clamping performance under 10/1000 μs surges, AEC-Q101 qualification status, bidirectional polarity, thermal resistance (RthJA = 90 °C/W), and compatibility with lead-free reflow per J-STD-020 MSL level 1.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within <1 ps to transients induced by inductive switching or ESD events. Its bidirectional structure enables symmetrical clamping across both polarities without external biasing, supporting unidirectional signal lines or AC-coupled interfaces.
The device delivers 5000 W peak pulse power (10/1000 μs) and 40 kW (8/20 μs), with low incremental surge resistance ensuring minimal voltage overshoot during high-current transients. Junction temperature range spans –55 °C to +175 °C, and it meets IEC 61000-4-2 ESD immunity up to 30 kV (contact/air).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (min/max) | 47.8 V / 52.8 V at 1 mA - guaranteed breakdown onset range; ensures predictable turn-on behavior across production lots. |
| VC @ IPPM | 69.4 V at 72.0 A (10/1000 μs) - clamped voltage during standardized surge; determines protected circuit's maximum transient exposure. |
| PPPM | 5000 W (10/1000 μs) - peak transient energy handling capacity; supports IEC 61000-4-5 Level 4 surge compliance when properly mounted. |
| TJ max. | +175 °C - maximum junction temperature; enables operation in under-hood automotive or high-ambient industrial environments. |
| RthJA | 90 °C/W - thermal resistance junction-to-ambient on standard FR4 PCB; informs derating requirements above 25 °C ambient. |
| ESD Rating | 30 kV HBM (contact/air) - exceeds IEC 61000-4-2 Level 4; protects downstream ICs from human-body-model discharge events. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no cathode band marking. Matte tin-plated leads, RoHS-compliant and halogen-free (M3 suffix), qualified to JESD 201 Class 2 whisker test.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Cathode side marked on datasheet drawing) | Transient current sink terminal | Provides low-impedance path to ground during overvoltage; bidirectional symmetry means either terminal serves as anode/cathode depending on polarity. |
| Cathode (Anode side marked on datasheet drawing) | Transient current sink terminal | Functionally identical to anode in bidirectional operation; terminals are electrically symmetric with no polarity-dependent marking required. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress - suitable for engine control, body electronics, and ADAS power rails. |
| MSL Level 1 (260 °C peak) | Enables single-pass lead-free reflow without moisture sensitivity concerns; eliminates baking requirement prior to assembly. |
| UL 497B recognition (E136766) | Confirms safety compliance for telecom and industrial signal-line protection applications requiring certified surge suppression. |
| Low clamping ratio (VC/VWM = 1.61) | Minimizes voltage overshoot relative to working voltage - critical for protecting 48 V automotive systems and 3.3/5 V logic interfaces. |
| 8/20 μs peak pulse current: 443 A | Supports high-energy lightning-induced surges per IEC 61000-4-5; enables use in outdoor telecom equipment and industrial fieldbus nodes. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V/48 V battery-fed ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Shunt-type transient voltage suppressor placed at power entry point before DC-DC converters and microcontrollers. Use Value: Clamps 120 V load dump spikes to ≤69.4 V, preventing damage to downstream 5 V LDOs and CAN transceivers rated for 40 V absolute max. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation PLC modules. IC Role / Device Role / Timing Role: Bidirectional TVS on differential or single-ended signal lines exposed to motor drive noise and relay switching. Use Value: Limits fast-rising transients (<1 ns rise time) to sub-70 V levels while maintaining <1 μA leakage at 43 V - preserving sensor accuracy and ADC reference integrity. |
| Telecom Data Line Surge Suppression | Consumer Device USB/DisplayPort ESD Protection |
|
Use Scenario: Front-end protection for Ethernet PHYs and PoE injectors subjected to lightning-induced surges on twisted-pair cables. IC Role / Device Role / Timing Role: Primary-level TVS on data pair inputs, coordinated with secondary GDT or polymer PTC devices. Use Value: Withstands 40 kW (8/20 μs) surges and provides 30 kV HBM ESD immunity - meeting GR-1089-CORE and ITU-T K.21 requirements. |
Use Scenario: Board-level ESD hardening for USB 3.2 Gen 2 and DisplayPort 1.4 ports in laptops and docking stations. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed directly at connector pins to shunt ESD before signal integrity degradation. Use Value: Delivers 30 kV contact-mode ESD protection with <100 pF junction capacitance at 0 V - preserving signal rise/fall times and eye diagram integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43CA-E3/5A (Vishay) | Lower PPPM (400 W vs. 5000 W); SMA package (DO-214AC); same VWM/VBR/VC specs. | Not suitable for high-energy surges (e.g., load dump, lightning); limited to low-power signal lines. | Select SMC5K43CA-M3/H when >1 kW surge energy must be absorbed; choose SMAJ43CA-E3/5A only for space-constrained, low-energy ESD-only roles. |
| 1.5KE43CA (ON Semiconductor) | Higher RthJA (~100 °C/W); axial-leaded DO-201 package; same electrical specs but not AEC-Q101 qualified. | Lacks automotive qualification and surface-mount compatibility; requires through-hole assembly and larger board area. | Use 1.5KE43CA only in non-automotive, cost-sensitive industrial designs where reflow compatibility and AEC-Q101 are not required. |
Compared with SMAJ43CA-E3/5A and 1.5KE43CA, the SMC5K43CA-M3/H uniquely combines 5000 W surge capability, AEC-Q101 qualification, SMC surface-mount packaging, and MSL Level 1 reflow readiness - making it the only option among the three validated for under-hood automotive power rail protection.
Availability
SMC5K43CA-M3/H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom infrastructure requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMC5K43CA-M3/H 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 belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications demanding AEC-Q101 validation and UL safety recognition.
FAQ
What is the clamping voltage of the SMC5K43CA-M3/H under a 10/1000 μs surge?
The SMC5K43CA-M3/H has a maximum clamping voltage (VC) of 69.4 V when subjected to its rated peak pulse current of 72.0 A with a 10/1000 μs waveform. This value is measured per Fig.3 in the Vishay datasheet 87024 and defines the upper voltage limit imposed on protected circuits during standardized surge events. The SMC5K43CA-M3/H maintains this clamping performance across its full operating temperature range.
Is the SMC5K43CA-M3/H qualified for automotive applications?
Yes, the SMC5K43CA-M3/H is AEC-Q101 qualified, as confirmed in the Vishay datasheet revision 10-Sep-2024 (Document Number: 87024). This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD robustness - validating its suitability for automotive powertrain, chassis, and body electronics. The SMC5K43CA-M3/H is explicitly listed in the "HM3" qualified variant group in the ordering table.
What does the "-M3/H" suffix indicate in SMC5K43CA-M3/H?
The "-M3" suffix denotes halogen-free, RoHS-compliant construction with matte tin-plated leads meeting J-STD-002 and JESD 22-B102 solderability standards, plus JESD 201 Class 2 whisker resistance. The "/H" indicates packaging in 7-inch plastic tape and reel with 850 units per reel. This full suffix confirms industrial-grade compliance and surface-mount assembly readiness for the SMC5K43CA-M3/H.
Does the SMC5K43CA-M3/H have polarity markings on the package?
No, the SMC5K43CA-M3/H is a bidirectional TVS diode and carries no cathode band or polarity marking on the SMC (DO-214AB) case. Its symmetrical construction allows installation in either orientation across a differential line or between power and ground. Polarity identification is unnecessary for functional operation - the SMC5K43CA-M3/H clamps equally in both directions above its breakdown threshold.
What is the thermal resistance of the SMC5K43CA-M3/H, and how does it affect layout?
The SMC5K43CA-M3/H has a junction-to-ambient thermal resistance (RthJA) of 90 °C/W when mounted on a standard FR4 PCB per JEDEC 51-2A. This value requires adequate copper pour and thermal vias beneath the pad to sustain repeated surges without exceeding +175 °C junction temperature. Layouts must avoid narrow traces or isolated pads - the SMC5K43CA-M3/H relies on PCB copper mass for heat dissipation during transient events.
SMC5K43CA-M3/H 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/H FAQ
1.How can I place an order for SMC5K43CA-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC5K43CA-M3/H 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/H reliable?
The price and inventory of SMC5K43CA-M3/H 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/H is usually 5 days.
3.What payment methods are accepted for SMC5K43CA-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC5K43CA-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC5K43CA-M3/H?
SMC5K43CA-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC5K43CA-M3/H 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/H?
For technical support, including SMC5K43CA-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC5K43CA-M3/H requirements.
6.How does Aetrix verify that SMC5K43CA-M3/H is sourced from the original manufacturer or authorized distributors?
All SMC5K43CA-M3/H 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/H meets industry standards.
7.What is the process for return or replacement of SMC5K43CA-M3/H?
All SMC5K43CA-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMC5K43CA-M3/H, 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/H part is unused and in its original packaging.
Return procedure for SMC5K43CA-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC5K43CA-M3/H Tags
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