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Vishay General Semiconductor - Diodes Division SA43HE3/73
- Part No.:
- SA43HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA43HE3/73.pdf
- Description:
- TVS DIODE 43VWM 76.7VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,619
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Product details
Overview
SA43HE3/73 from Vishay General Semiconductor is a bi-directional Transient Voltage Suppressor (TVS) diode in DO-204AC (DO-15) package, designed for clamping voltage transients on signal or power lines. It features a 43 V stand-off voltage (VWM), 47.8–52.8 V breakdown voltage (VBR) at 1 mA, 500 W peak pulse power (10/1000 μs), 69.4 V maximum clamping voltage at 7.2 A, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SA43HE3/73 datasheet, SA43HE3/73 pinout, SA43HE3/73 application, or SA43HE3/73 equivalent, this device is selected for robust ESD and surge protection in automotive sensor interfaces, industrial I/O lines, and telecom power rails where bidirectional clamping, low leakage (<1.0 μA at VWM), and high-temperature operation (TJ = −55 to +175 °C) are required.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, with identical VBR, VC, and IPPM specifications in forward and reverse directions. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance, enabling fast response (<1 ns) to transient events such as ISO 7637-2 load dump or IEC 61000-4-5 surges.
The device complies with AEC-Q101 stress testing including temperature cycling, HTRB, and surge current endurance. Its DO-204AC package supports manual or automated through-hole assembly, with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102, and meets UL 94 V-0 flammability rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (min/max) | 47.8 V / 52.8 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 69.4 V at 7.2 A - Clamped voltage under 500 W 10/1000 μs surge; limits downstream IC stress to safe levels. |
| IPPM | 7.2 A - Peak pulse current capability; determines survivability against standardized lightning/surge waveforms. |
| PPPM | 500 W - Peak pulse power rating (10/1000 μs); defines transient energy absorption capacity without failure. |
| ID @ VWM | <1.0 μA - Reverse leakage current at rated stand-off voltage; minimizes standby power loss and signal distortion. |
| TJ Range | −55 °C to +175 °C - Junction temperature range; enables deployment in under-hood automotive or industrial environments. |
Pinout & Package
SA43HE3/73 is housed in a DO-204AC (DO-15) molded epoxy package with axial leads. Bi-directional construction means no polarity marking; both terminals are functionally identical and interchangeable in circuit layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Either terminal serves as clamping node; bidirectional symmetry eliminates orientation constraints during placement. |
| Lead 1 / Lead 2 | Connection interface | Matte tin-plated axial leads support reliable solder joints; lead length ≥0.230" (5.8 mm) required for thermal derating compliance. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance per JESD47. |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage drift over time and temperature-critical for long-life systems. |
| 500 W peak pulse power (10/1000 μs) | Supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) and ISO 7637-2 Pulse 1/2/5a immunity without external series impedance. |
| UL 94 V-0 molding compound | Provides flame-retardant housing essential for safety-critical automotive and industrial enclosures. |
| RoHS-compliant & whisker-tested (JESD 201 Class 2) | Meets global environmental regulations and prevents tin whisker growth in high-reliability, long-duration applications. |
Applications
| Automotive Sensor Interface | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN, LIN, or analog sensor lines (e.g., pressure, temperature) from load dump and ESD in engine control units. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt transients before reaching MCU or signal conditioner. Use Value: With 69.4 V clamping and AEC-Q101 qualification, SA43HE3/73 maintains signal integrity while surviving repeated 12 V system surges up to 175 °C ambient. |
Use Scenario: Safeguarding digital input/output channels of programmable logic controllers against field-induced surges from solenoid switching or motor drives. IC Role / Device Role / Timing Role: Primary transient suppressor on 24 V DC I/O rails, used alongside series resistors or ferrites for coordinated protection. Use Value: 500 W pulse rating and <1.0 μA leakage enable robust protection without loading active circuits or degrading noise margins. |
| Telecom Power Rail Protection | Consumer Appliance Motor Control |
Use Scenario: Clamping induced transients on −48 V or +24 V telecom power distribution boards exposed to lightning-induced coupling. IC Role / Device Role / Timing Role: Parallel-connected TVS on primary DC input, acting as last-line defense after upstream filters and MOVs. Use Value: Symmetrical bi-directional behavior ensures protection regardless of polarity reversal during fault conditions; DO-204AC allows high-density board placement. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines or HVAC blowers connected to microcontroller GPIOs. IC Role / Device Role / Timing Role: Localized TVS across motor coil terminals or driver outputs to prevent latch-up or gate oxide damage. Use Value: Fast sub-nanosecond response and 43 V VWM provide precise clamping margin above nominal 36 V motor supply, minimizing false triggering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43CA | Same VWM (43 V), but SMA package (SMT); lower PPPM (400 W); no AEC-Q101 qualification. | Preferred for space-constrained PCBs where reflow assembly is used; unsuitable for under-hood automotive. | Select SMAJ43CA only when footprint size and SMT process outweigh automotive qualification requirements. |
| 1.5KE43CA | Same VWM and DO-204AC package; higher PPPM (1500 W); larger DO-201AD body; not AEC-Q101 qualified. | Better suited for high-energy industrial surge zones (e.g., AC mains input), but incompatible with automotive thermal cycling specs. | Choose 1.5KE43CA for non-automotive applications demanding >500 W surge handling and legacy through-hole compatibility. |
Compared with SMAJ43CA and 1.5KE43CA, SA43HE3/73 uniquely combines AEC-Q101 qualification, DO-204AC form factor, and 500 W pulse rating-making it the only option certified for automotive under-hood deployment without compromising board-level surge immunity.
Availability
SA43HE3/73 is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and telecom infrastructure requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for SA43HE3/73 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 performance.
The SAxxHE3 series belongs to Vishay's TRANSZORB® family of AEC-Q101-qualified TVS diodes, engineered specifically for automotive and harsh-environment industrial applications demanding consistent clamping behavior and extended temperature operation.
FAQ
What is the polarity configuration of SA43HE3/73?
SA43HE3/73 is a bi-directional TVS diode with symmetrical electrical characteristics in both directions. It has no cathode marking and functions identically regardless of terminal orientation-ideal for protecting AC-coupled or polarity-agnostic signal lines. This design eliminates assembly errors and simplifies layout for differential or floating circuits.
Does SA43HE3/73 meet automotive reliability standards?
Yes, SA43HE3/73 carries AEC-Q101 qualification, verified through stress tests including high-temperature reverse bias, temperature cycling, and surge current endurance. The HE3 suffix explicitly denotes AEC-Q101 compliance, making SA43HE3/73 suitable for engine control modules, body electronics, and ADAS sensors where automotive-grade reliability is mandatory.
What is the maximum clamping voltage of SA43HE3/73 under surge conditions?
The maximum clamping voltage (VC) of SA43HE3/73 is 69.4 V at 7.2 A peak pulse current (IPPM), measured with a 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during a 500 W transient event, ensuring downstream components remain within safe operating voltage windows.
Can SA43HE3/73 be used in place of a unidirectional TVS like SA43A?
No-SA43HE3/73 is bi-directional and lacks polarity marking, whereas SA43A is unidirectional with a defined cathode band. Substituting SA43HE3/73 for SA43A may cause unintended conduction in DC-biased circuits. Use SA43HE3/73 only where bidirectional clamping is required, such as AC signal lines or floating power rails.
What packaging and plating specifications apply to SA43HE3/73?
SA43HE3/73 uses a DO-204AC (DO-15) package with matte tin-plated axial leads compliant with J-STD-002 and JESD 22-B102 solderability standards. The HE3 suffix confirms JESD 201 Class 2 whisker resistance, and the molding compound meets UL 94 V-0 flammability requirements-ensuring robustness in automated assembly and safety-critical enclosures.
SA43HE3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 76.7V
- Current - Peak Pulse (10/1000µs):
- 6.5A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA43HE3/73 FAQ
1.How can I place an order for SA43HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA43HE3/73 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 SA43HE3/73 reliable?
The price and inventory of SA43HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA43HE3/73 is usually 5 days.
3.What payment methods are accepted for SA43HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA43HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA43HE3/73?
SA43HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA43HE3/73 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 SA43HE3/73?
For technical support, including SA43HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA43HE3/73 requirements.
6.How does Aetrix verify that SA43HE3/73 is sourced from the original manufacturer or authorized distributors?
All SA43HE3/73 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 SA43HE3/73 meets industry standards.
7.What is the process for return or replacement of SA43HE3/73?
All SA43HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA43HE3/73, 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 SA43HE3/73 part is unused and in its original packaging.
Return procedure for SA43HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA43HE3/73 Tags
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