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Vishay General Semiconductor - Diodes Division P4KA39HE3/73
- Part No.:
- P4KA39HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KA39HE3/73.pdf
- Description:
- TVS DIODE 31.6VWM 56.4VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:3,599
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Product details
Overview
P4KA39HE3/73 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), 35.1–42.9 V breakdown voltage (VBR), and 185 °C maximum junction temperature. It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients in automotive powertrain and body electronics.
For engineers reviewing the P4KA39HE3/73 datasheet, P4KA39HE3/73 pinout, P4KA39HE3/73 application, or P4KA39HE3/73 equivalent, key selection criteria include clamping voltage (56.4 V at 7.1 A), AEC-Q101 qualification, RoHS-compliant HE3 packaging, and 0.100 %/°C VBR temperature coefficient - critical for high-temperature engine bay deployments.
Technical Context
This TVS diode uses Vishay's patented PAR® construction to deliver 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 polarity and 31.6 V stand-off voltage (VWM) support DC-biased protection circuits without reverse leakage compromise.
Designed for high-reliability automotive environments, the device operates across –65 °C to +185 °C and maintains stable clamping performance under repetitive 0.01 % duty cycle pulses. The matte tin-plated leads meet J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 35.1 V / 42.9 V - defines reliable conduction onset range under 10 mA test current; ensures robust margin above 31.6 V system operating voltage |
| VC @ IPPM | 56.4 V - maximum clamped voltage during 7.1 A 10/1000 µs surge; determines protected circuit's worst-case overvoltage stress |
| PPPM | 400 W - peak pulse power handling with 10/1000 µs waveform; supports ISO 7637-2 Pulse 5a load-dump immunity |
| TJ max. | +185 °C - enables placement near high-heat sources (e.g., ECUs, motor drivers) without derating loss |
| VWM | 31.6 V - maximum continuous reverse working voltage; sets upper limit for DC bias before leakage rises significantly |
| αVBR | 0.100 %/°C - temperature coefficient of breakdown voltage; allows accurate VBR prediction across full operating range |
Pinout & Package
Package: DO-204AL (DO-41), axial leaded, molded epoxy case meeting UL 94 V-0; cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return in unidirectional clamp configuration |
| Cathode | Protected line connection / surge sink node | Connected to signal/power line requiring protection; carries full surge current to anode during clamping |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables consistent low dynamic impedance and repeatable clamping behavior across production lots and temperature extremes |
| AEC-Q101 qualification | Validates reliability for automotive applications including powertrain, chassis, and ADAS subsystems per stress test requirements |
| HE3 suffix packaging | RoHS-compliant, high-reliability variant with JESD201 Class 2 whisker resistance and 260 °C solder dip tolerance |
| 400 W peak pulse rating | Meets ISO 7637-2 Pulse 5a (load dump) energy absorption without degradation over lifetime |
Applications
| Engine Control Unit (ECU) Power Input Protection | Automotive Sensor Signal Line Protection |
|---|---|
Use Scenario: Protects 12 V supply rail of engine control units against ISO 7637-2 Pulse 5a load-dump transients up to 60 V. IC Role / Device Role / Timing Role: Unidirectional TVS clamps surge energy to ground while maintaining DC integrity during normal operation. Use Value: Prevents latch-up or permanent damage to microcontrollers and power management ICs under repeated 400 W surges. | Use Scenario: Shields analog outputs of pressure, temperature, and position sensors from inductive switching noise in body control modules. IC Role / Device Role / Timing Role: Fast-response TVS absorbs sub-microsecond transients on low-voltage signal lines (e.g., 0–5 V ratiometric outputs). Use Value: Maintains signal fidelity and prevents false triggering in safety-critical feedback loops without adding capacitance-induced delay. |
| Body Electronics Power Distribution | Electric Power Steering (EPS) Motor Driver Protection |
Use Scenario: Guards fused 12 V distribution nodes feeding door modules, lighting, and HVAC actuators against relay coil flyback. IC Role / Device Role / Timing Role: Standoff-rated TVS blocks leakage during quiescent state and clamps >31.6 V spikes within nanoseconds. Use Value: Eliminates need for additional filtering components while sustaining >100,000 surge cycles per AEC-Q101 lifetime testing. | Use Scenario: Safeguards half-bridge gate drivers and current-sense amplifiers in EPS motor control boards exposed to motor commutation noise. IC Role / Device Role / Timing Role: High-temperature-stable TVS conducts surge current away from sensitive logic and analog interfaces during PWM transitions. Use Value: Ensures uninterrupted torque control under sustained 150 °C ambient conditions with no VBR drift beyond ±5 %. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A-E3/5A | Lower PPPM (400 W same), but lower VBR range (32.4–39.6 V); SMA package (surface-mount) | Not AEC-Q101 qualified; intended for industrial/commercial use only | Select when board space constraints require SMD and automotive qualification is not required |
| 1.5KE39A | Same VBR range (35.1–42.9 V), higher IFSM (100 A vs. 40 A), through-hole DO-201AD package | Lacks AEC-Q101 qualification and HE3 reliability enhancements (e.g., whisker resistance) | Choose for cost-sensitive non-automotive designs needing higher surge current margin |
Compared with SMAJ36A-E3/5A and 1.5KE39A, the P4KA39HE3/73 uniquely combines AEC-Q101 qualification, DO-41 mechanical robustness, and HE3 process reliability - making it the only option validated for under-hood automotive deployment where thermal cycling and long-term whisker resistance are mandatory.
Availability
P4KA39HE3/73 is available at Aetrix Electronics and suitable for automotive powertrain control, body electronics protection, and electric power steering systems requiring stable component supply across extended product lifecycles.
Supply support for P4KA39HE3/73 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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P4KA series belongs to Vishay's automotive-grade TVS portfolio, engineered specifically for harsh-environment transient suppression in vehicles - targeting ISO 7637-2 compliance, AEC-Q101 validation, and under-hood thermal resilience.
FAQ
What is the clamping voltage of the P4KA39HE3/73 under peak surge conditions?
The P4KA39HE3/73 has a maximum clamping voltage (VC) of 56.4 V at 7.1 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during transient events. The P4KA39HE3/73 maintains this clamping performance across its full operating temperature range, supporting robust design margins in automotive applications.
Is the P4KA39HE3/73 qualified to AEC-Q101 standards?
Yes, the P4KA39HE3/73 is explicitly AEC-Q101 qualified, as confirmed in Vishay document 88364 (Revision: 21-Oct-08), Section "Notes" on page 3. This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - validating its suitability for automotive powertrain, chassis, and body electronics. The HE3 suffix further denotes high-reliability automotive grade compliance.
What does the HE3 suffix indicate for the P4KA39HE3/73?
The HE3 suffix on P4KA39HE3/73 specifies a RoHS-compliant, high-reliability automotive-grade variant. It confirms compliance with JESD201 Class 2 whisker resistance, matte tin-plated leads solderable per J-STD-002 and JESD22-B102, and qualification to AEC-Q101. Unlike standard commercial versions, the HE3 variant undergoes enhanced process controls and screening to ensure long-term stability in demanding automotive environments.
Can the P4KA39HE3/73 be used in bidirectional configurations?
No, the P4KA39HE3/73 is available in uni-directional polarity only, as stated in the Vishay datasheet features section. Its electrical characteristics - including breakdown voltage specification and clamping behavior - are defined for single-quadrant operation. For bidirectional protection, designers must select a dedicated bi-directional TVS such as the P4SMA39CA or equivalent, as the P4KA39HE3/73 lacks symmetrical reverse conduction capability.
What is the maximum junction temperature rating for the P4KA39HE3/73?
The P4KA39HE3/73 has a maximum junction temperature (TJ) rating of +185 °C, as specified in the "Primary Characteristics" table of Vishay document 88364. This elevated rating enables reliable operation in high-ambient environments such as engine compartments and power inverters, where thermal derating is minimized and long-term parametric stability is maintained up to the absolute maximum limit.
P4KA39HE3/73 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):
- 31.6V
- Voltage - Breakdown (Min):
- 35.1V
- Voltage - Clamping (Max) @ Ipp:
- 56.4V
- Current - Peak Pulse (10/1000µs):
- 7.1A
- 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)
P4KA39HE3/73 FAQ
1.How can I place an order for P4KA39HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KA39HE3/73 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 P4KA39HE3/73 reliable?
The price and inventory of P4KA39HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KA39HE3/73 is usually 5 days.
3.What payment methods are accepted for P4KA39HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KA39HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KA39HE3/73?
P4KA39HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KA39HE3/73 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 P4KA39HE3/73?
For technical support, including P4KA39HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KA39HE3/73 requirements.
6.How does Aetrix verify that P4KA39HE3/73 is sourced from the original manufacturer or authorized distributors?
All P4KA39HE3/73 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 P4KA39HE3/73 meets industry standards.
7.What is the process for return or replacement of P4KA39HE3/73?
All P4KA39HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with P4KA39HE3/73, 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 P4KA39HE3/73 part is unused and in its original packaging.
Return procedure for P4KA39HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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