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Vishay General Semiconductor - Diodes Division SM8S43A-7001HE4/2N
- Part No.:
- SM8S43A-7001HE4/2N
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM8S43A-7001HE4/2N.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,449
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Product details
Overview
SM8S43A-7001HE4/2N from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump protection. It features a 43 V stand-off voltage (VWM), 47.8–52.8 V breakdown voltage (VBR), 6600 W peak pulse power (10/1000 μs), 95.1 A peak pulse current, and AEC-Q101 qualification for under-hood automotive electronics.
For engineers reviewing the SM8S43A-7001HE4/2N datasheet, SM8S43A-7001HE4/2N pinout, SM8S43A-7001HE4/2N application, or SM8S43A-7001HE4/2N equivalent, key selection criteria include clamping voltage (69.4 V at IPPM), thermal resistance (0.90 °C/W), unidirectional polarity, DO-218AB package compatibility, and ISO7637-2 surge compliance for 12 V system protection.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to deliver stable clamping performance up to TJ = 175 °C, enabling reliable operation in high-temperature automotive environments. Its unidirectional configuration and heatsink-anode polarity support direct integration into DC power rail protection circuits with minimal layout impact.
The device meets MSL Level 1 per J-STD-020 and withstands 700 A peak forward surge current (IFSM, 8.3 ms half-sine), making it suitable for transient suppression in alternator-regulated vehicle electrical systems where load dump events generate exponential surges up to 10 ms duration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe DC rail margin for 12 V automotive systems. |
| VBR (min/max) | 47.8 V / 52.8 V - Breakdown voltage range at 5 mA test current; ensures consistent turn-on across production lots and temperature. |
| VC @ IPPM | 69.4 V - Clamping voltage at 95.1 A peak pulse; limits downstream IC stress during ISO7637-2 load dump transients. |
| PPPM (10/1000 μs) | 6600 W - Peak pulse power handling; enables single-device protection against high-energy transients without derating. |
| RθJC | 0.90 °C/W - Junction-to-case thermal resistance; supports high-power dissipation when mounted on copper heatsink area. |
| TJ max | +175 °C - Maximum junction temperature; validated for under-hood placement near engine compartments. |
| Polarity | Unidirectional - Anode connected to heatsink; requires correct orientation in series with protected line for forward-biased conduction path. |
Pinout & Package
Package: DO-218AB - Surface-mount molded case with matte tin-plated leads, UL 94 V-0 rated compound, and heatsink-integrated cathode-side metal tab (anode terminal is lead 1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 | Anode | Connected to protected line (e.g., battery feed); must be routed to low-inductance trace for fast transient response. |
| Lead 2 / Metal Heatsink | Cathode | Primary thermal and electrical return path; requires ≥100 mm² copper pour for RθJC < 1.0 °C/W performance. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process ensures stable VBR over 1000+ thermal cycles and lifetime reliability in automotive duty cycles. |
| AEC-Q101 qualification | Validated for automotive-grade stress testing including HTGB, HTRB, TCT, and mechanical shock-required for ECU and body control module designs. |
| Low leakage at VWM | ≤10 μA at 43 V and 25 °C; minimizes standby current loss in always-on vehicle subsystems like telematics or alarm controllers. |
| ISO7637-2 compliance | Passes Pulse 5a (load dump) testing per specification when used with recommended PCB layout and heatsinking. |
| MSL Level 1 rating | Reflow-compatible up to 245 °C peak without moisture-induced failure-enables standard SMT assembly without baking. |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) Battery Line |
|---|---|
Use Scenario: Protects microcontroller power rails from alternator load dump transients during ignition-off events in gasoline/diesel vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS clamps 69.4 V surges within nanoseconds to prevent latch-up or gate oxide damage in PMICs and LDOs. Use Value: Eliminates need for external series resistors or RC snubbers while maintaining 43 V nominal rail integrity during normal operation. | Use Scenario: Shields CAN transceivers and LIN drivers from battery line transients caused by relay switching or accessory load cycling. IC Role / Device Role / Timing Role: Fast-response clamping element placed upstream of input filters to preserve signal integrity on low-voltage digital buses. Use Value: Enables robust 12 V supply conditioning without degrading CAN bus rise/fall times due to low junction capacitance (<40 pF at zero bias). |
| ADAS Camera Power Supply | Electric Power Steering (EPS) Motor Driver |
Use Scenario: Safeguards image sensor and ISP power inputs against transients induced by nearby high-current actuators in autonomous driving systems. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 5 V or 3.3 V regulated output derived from buck converter feeding camera module. Use Value: Prevents pixel corruption or frame drop during transient events by limiting voltage excursion to ≤69.4 V at full 95.1 A surge current. | Use Scenario: Protects gate drivers and current sense amplifiers in EPS motor control units exposed to high di/dt noise from BLDC commutation. IC Role / Device Role / Timing Role: High-energy TVS on main 12 V input rail, thermally coupled to aluminum heatsink for sustained 175 °C operation. Use Value: Maintains functional safety integrity (ASIL-B compatible design) by preventing destructive overvoltage during motor stall or short-circuit recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43A-E3/57T | Lower PPPM (400 W vs. 6600 W); SMA package (RθJC ≈ 50 °C/W vs. 0.90 °C/W); no AEC-Q101 qualification. | Suitable only for low-energy consumer or industrial I/O protection-not automotive load dump. | Select only if energy requirements are ≤400 W and automotive qualification is not required. |
| TPSMD43A | Same DO-218AB package and 43 V VWM; lower clamping voltage (64.5 V vs. 69.4 V); identical AEC-Q101 and ISO7637-2 compliance. | Direct alternative for space-constrained designs needing tighter clamping margin. | Prefer when downstream IC absolute maximum ratings require sub-65 V clamping under 95 A surge. |
Compared with SMAJ43A-E3/57T and TPSMD43A, the SM8S43A-7001HE4/2N delivers 16.5× higher surge power handling and superior thermal management-critical for automotive load dump where energy exceeds 5000 W and junction temperature must remain below 175 °C without forced cooling.
Availability
SM8S43A-7001HE4/2N is available at Aetrix Electronics and suitable for automotive ECU power protection, ADAS camera supply conditioning, and electric power steering motor driver designs requiring stable component supply and AEC-Q101-compliant surge immunity.
Supply support for SM8S43A-7001HE4/2N 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, and TVS devices for automotive, industrial, and computing markets.
The SM8SxxA family is engineered specifically for automotive load dump protection, combining high-temperature stability (175 °C), ultra-low thermal resistance, and ISO7637-2 compliance in a rugged DO-218AB package.
FAQ
What is the clamping voltage of the SM8S43A-7001HE4/2N at its rated peak pulse current?
The SM8S43A-7001HE4/2N has a maximum clamping voltage (VC) of 69.4 V at its specified peak pulse current (IPPM) of 95.1 A using a 10/1000 μs waveform. This value is measured under standardized test conditions per JEDEC standards and ensures predictable overvoltage limiting during automotive load dump events. The SM8S43A-7001HE4/2N maintains this clamping performance across its full operating temperature range up to +175 °C.
Is the SM8S43A-7001HE4/2N qualified for automotive applications?
Yes, the SM8S43A-7001HE4/2N is AEC-Q101 qualified and explicitly designed for automotive use. It meets ISO7637-2 Pulse 5a (load dump) requirements and is rated for continuous operation from –55 °C to +175 °C junction temperature. The SM8S43A-7001HE4/2N also complies with MSL Level 1 per J-STD-020 and passes JESD201 Class 2 whisker testing, confirming suitability for under-hood and ECU-level deployment.
What package type does the SM8S43A-7001HE4/2N use, and how is polarity oriented?
The SM8S43A-7001HE4/2N uses the DO-218AB surface-mount package with a metal heatsink integrated into the cathode side. Polarity is unidirectional, with Lead 1 serving as the anode and the metal heatsink (Lead 2) as the cathode. This configuration requires the anode to be connected to the protected line and the cathode to ground or low-impedance return, as confirmed in Vishay's mechanical drawings and application notes for the SM8S43A-7001HE4/2N.
How does the thermal performance of the SM8S43A-7001HE4/2N compare to standard SMA TVS diodes?
The SM8S43A-7001HE4/2N achieves a typical junction-to-case thermal resistance (RθJC) of 0.90 °C/W, significantly lower than SMA-packaged TVS diodes (typically >50 °C/W). This enables the SM8S43A-7001HE4/2N to dissipate 6600 W pulses without excessive temperature rise when mounted on adequate copper area. The DO-218AB package's integrated heatsink makes the SM8S43A-7001HE4/2N uniquely suited for high-power automotive transients where SMA alternatives would thermally saturate.
Can the SM8S43A-7001HE4/2N replace older SM8S43A variants with different suffixes?
Yes, the SM8S43A-7001HE4/2N is functionally identical to other SM8S43A variants sharing the same base part number and HE4/2N packaging code (e.g., SM8S43AHE3/2D), differing only in reel packaging and traceability markings. All SM8S43A devices share identical electrical characteristics, AEC-Q101 qualification, and DO-218AB mechanical form factor. The SM8S43A-7001HE4/2N maintains full interchangeability in design and manufacturing for load dump protection applications.
SM8S43A-7001HE4/2N Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-218AB
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 95.1A
- Power - Peak Pulse:
- 6600W (6.6kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-218AB
SM8S43A-7001HE4/2N FAQ
1.How can I place an order for SM8S43A-7001HE4/2N through Aetrix?
Please submit a Request for Quotation (RFQ) for SM8S43A-7001HE4/2N 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 SM8S43A-7001HE4/2N reliable?
The price and inventory of SM8S43A-7001HE4/2N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM8S43A-7001HE4/2N is usually 5 days.
3.What payment methods are accepted for SM8S43A-7001HE4/2N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM8S43A-7001HE4/2N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM8S43A-7001HE4/2N?
SM8S43A-7001HE4/2N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM8S43A-7001HE4/2N 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 SM8S43A-7001HE4/2N?
For technical support, including SM8S43A-7001HE4/2N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM8S43A-7001HE4/2N requirements.
6.How does Aetrix verify that SM8S43A-7001HE4/2N is sourced from the original manufacturer or authorized distributors?
All SM8S43A-7001HE4/2N 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 SM8S43A-7001HE4/2N meets industry standards.
7.What is the process for return or replacement of SM8S43A-7001HE4/2N?
All SM8S43A-7001HE4/2N units undergo pre-shipment inspection (PSI). If there is an issue with SM8S43A-7001HE4/2N, 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 SM8S43A-7001HE4/2N part is unused and in its original packaging.
Return procedure for SM8S43A-7001HE4/2N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM8S43A-7001HE4/2N Tags
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