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Vishay General Semiconductor - Diodes Division P4KA43AHE3/73
- Part No.:
- P4KA43AHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KA43AHE3/73.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:8,940
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Product details
Overview
P4KA43AHE3/73 from Vishay General Semiconductor is a unidirectional automotive-grade transient voltage suppressor (TVS) diode in DO-204AL (DO-41) package, rated for 400 W peak pulse power (10/1000 µs), 6.7 A peak pulse current, and 59.3 V clamping voltage at IPPM. It features AEC-Q101 qualification, 185 °C max junction temperature, and RoHS-compliant matte tin-plated leads - designed for protecting automotive sensor signal lines against inductive switching transients.
For engineers reviewing the P4KA43AHE3/73 datasheet, P4KA43AHE3/73 pinout, P4KA43AHE3/73 application, or P4KA43AHE3/73 equivalent, key selection criteria include clamping voltage margin vs. system rail, TJ = 185 °C thermal robustness for under-hood environments, unidirectional polarity compatibility with DC-biased signal paths, and JESD201 Class 2 whisker resistance for high-reliability solder joints.
Technical Context
This TVS diode uses Vishay's patented PAR® construction to achieve low incremental surge resistance and fast response time (<1 ns), enabling effective suppression of ESD and load-dump transients per ISO 7637-2 and IEC 61000-4-5. Its unidirectional configuration provides forward conduction capability while clamping reverse surges above VBR = 40.9–45.2 V.
The device operates across –65 °C to +185 °C junction temperature range and maintains stable breakdown voltage with 0.101 %/°C temperature coefficient. It is rated for 40 A non-repetitive forward surge (8.3 ms half-sine) and dissipates 1.5 W continuously on infinite heatsink at TL = 75 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 400 W - sustains automotive load-dump transients without failure |
| Clamping Voltage at IPPM | 59.3 V - limits voltage seen by protected ICs during 6.7 A surge |
| Breakdown Voltage Range | 40.9 V to 45.2 V at 1 mA - ensures reliable triggering before system overvoltage damage |
| Operating Temperature Range | –65 °C to +185 °C - qualified for engine bay and transmission control unit environments |
| AEC-Q101 Qualification | Yes - validated for automotive electronics per stress test requirements |
| Package | DO-204AL (DO-41) - industry-standard through-hole footprint with 9.5 mm lead length |
| RoHS & Whisker Resistance | RoHS-compliant; JESD201 Class 2 - prevents tin whisker growth in long-life automotive modules |
Pinout & Package
DO-204AL (DO-41) molded epoxy package with axial leads; cathode denoted by color band. Matte tin-plated leads meet J-STD-002 and JESD22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connects to lower-potential side of protected line (e.g., GND or signal return) |
| Cathode | Reverse surge clamping node | Connects to higher-potential side (e.g., battery rail or signal line); marked by color band |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Reduces incremental surge resistance for tighter clamping and lower let-through energy |
| 400 W peak pulse power (10/1000 µs) | Meets ISO 7637-2 Pulse 5a (load dump) requirements for 12 V systems |
| 185 °C maximum junction temperature | Enables placement near heat sources (e.g., ECUs, motor drivers) without derating |
| JESD201 Class 2 whisker resistance | Ensures long-term solder joint integrity in automotive modules with >15-year service life |
| Uni-directional polarity only | Suitable for DC-biased signal lines (e.g., LIN, CAN stubs, sensor analog outputs) |
Applications
| Automotive Body Control Module (BCM) | Engine Control Unit (ECU) Sensor Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and door module switches from inductive kickback during actuator coil de-energization. IC Role / Device Role / Timing Role: Unidirectional TVS clamps reverse transients on 12 V supply rails and signal lines while allowing normal forward bias operation. Use Value: Prevents latch-up or permanent damage to LIN transceivers during repeated load-switch events in 15-year vehicle lifecycle. |
Use Scenario: Safeguarding oxygen sensor (O2) heater driver outputs and MAP sensor signal lines against alternator load dump and relay bounce. IC Role / Device Role / Timing Role: Fast-response clamping element placed at connector entry point to shunt surge energy before reaching precision analog front-end. Use Value: Maintains sensor accuracy and avoids false fault codes by limiting clamped voltage to 59.3 V at full 6.7 A surge current. |
| Transmission Control Unit (TCU) | Electric Power Steering (EPS) Motor Driver |
Use Scenario: Shielding solenoid driver ICs and position feedback circuits from high-energy transients generated by gear-shift solenoids. IC Role / Device Role / Timing Role: Primary overvoltage protection device on 12 V power input and PWM-controlled solenoid return paths. Use Value: Withstands 40 A forward surge (8.3 ms) and 400 W pulses without degradation, ensuring TCU functional safety compliance. |
Use Scenario: Suppressing commutation spikes on H-bridge gate drive and current sense lines in brushless EPS motor controllers. IC Role / Device Role / Timing Role: Low-inductance, low-capacitance TVS placed adjacent to gate drivers to minimize loop area and preserve switching timing. Use Value: Junction capacitance <100 pF at VWM enables use on high-speed PWM lines without signal distortion or timing skew. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A-E3/52 (Vishay) | Surface-mount SMB package; same VBR (40.9–45.2 V), identical PPPM (400 W), but lower TJ max. (150 °C) | Requires PCB rework for SMT assembly; unsuitable for through-hole legacy designs or high-temperature mounting points | Select when board space is constrained and thermal environment stays below 150 °C junction temperature |
| 1.5KE43A (ON Semiconductor) | Same DO-41 package and VBR range, but rated for 1500 W peak power (10/1000 µs); higher clamping voltage (64.5 V) | Higher let-through voltage may exceed safe margins for 3.3 V or 5 V logic interfaces downstream | Choose only when system-level testing confirms 64.5 V clamping is acceptable and higher surge margin is required |
Compared with SMBJ43A-E3/52 and 1.5KE43A, the P4KA43AHE3/73 uniquely combines AEC-Q101 qualification, 185 °C junction rating, and DO-41 through-hole compatibility - making it the only option qualified for under-hood placement in modern automotive control units without derating or layout change.
Availability
P4KA43AHE3/73 is available at Aetrix Electronics and suitable for automotive body control modules, engine management systems, transmission control units, and electric power steering systems requiring stable component supply across extended product lifecycles.
Supply support for P4KA43AHE3/73 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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The P4KA43AHE3/73 belongs to Vishay's automotive-grade TVS diode family engineered specifically for AEC-Q101 compliance and under-hood transient suppression - targeting harsh-environment signal and power line protection in next-generation vehicle ECUs.
FAQ
What is the clamping voltage of the P4KA43AHE3/73 at its rated peak pulse current?
The P4KA43AHE3/73 has a maximum clamping voltage (VC) of 59.3 V at its rated peak pulse current (IPPM) of 6.7 A, measured using the standard 10/1000 µs waveform. This value ensures protected downstream circuitry remains within safe operating limits during automotive load-dump events. The P4KA43AHE3/73 achieves this clamping performance while maintaining low incremental surge resistance due to its patented PAR® construction.
Is the P4KA43AHE3/73 suitable for use in automotive engine control units?
Yes, the P4KA43AHE3/73 is explicitly qualified to AEC-Q101 and rated for operation up to +185 °C junction temperature, making it suitable for placement in engine control units where ambient temperatures exceed 125 °C. Its DO-204AL package supports reliable through-hole mounting on high-thermal-mass PCBs, and the P4KA43AHE3/73 meets ISO 7637-2 Pulse 5a requirements for 12 V system load-dump immunity.
Does the P4KA43AHE3/73 have bidirectional polarity?
No, the P4KA43AHE3/73 is available in uni-directional polarity only, as confirmed in the Vishay datasheet Document Number 88364. It functions as a standard avalanche diode in reverse bias and conducts forward current up to 40 A (8.3 ms half-sine). For bidirectional protection, a separate device such as the P4SMA43CA would be required - the P4KA43AHE3/73 is not rated or characterized for symmetrical clamping.
What is the meaning of the HE3/73 suffix in P4KA43AHE3/73?
The HE3/73 suffix indicates RoHS-compliant, high-reliability automotive grade packaging: HE3 denotes matte tin-plated leads meeting JESD201 Class 2 whisker resistance, and /73 specifies tape-and-reel packaging with 73 mm reel diameter and 5500-unit base quantity. This suffix confirms the P4KA43AHE3/73 is built to automotive quality standards and is not a commercial-grade variant.
How does the P4KA43AHE3/73 compare to standard 1N4xxx series diodes for transient suppression?
The P4KA43AHE3/73 is purpose-built for transient suppression with 400 W peak pulse power, controlled clamping behavior, and AEC-Q101 qualification - unlike general-purpose rectifiers like the 1N4007, which lack defined clamping voltage, surge ratings, or automotive reliability validation. The P4KA43AHE3/73 delivers repeatable, low-impedance clamping within 1 ns, whereas 1N4xxx devices exhibit uncontrolled avalanche characteristics and risk thermal runaway under surge conditions.
P4KA43AHE3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AL, DO-41, Axial
- Series:
- PAR®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 36.8V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.3V
- Current - Peak Pulse (10/1000µs):
- 6.7A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
P4KA43AHE3/73 FAQ
1.How can I place an order for P4KA43AHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KA43AHE3/73 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 P4KA43AHE3/73 reliable?
The price and inventory of P4KA43AHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KA43AHE3/73 is usually 5 days.
3.What payment methods are accepted for P4KA43AHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KA43AHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KA43AHE3/73?
P4KA43AHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KA43AHE3/73 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 P4KA43AHE3/73?
For technical support, including P4KA43AHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KA43AHE3/73 requirements.
6.How does Aetrix verify that P4KA43AHE3/73 is sourced from the original manufacturer or authorized distributors?
All P4KA43AHE3/73 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 P4KA43AHE3/73 meets industry standards.
7.What is the process for return or replacement of P4KA43AHE3/73?
All P4KA43AHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with P4KA43AHE3/73, 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 P4KA43AHE3/73 part is unused and in its original packaging.
Return procedure for P4KA43AHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4KA43AHE3/73 Tags
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