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Vishay General Semiconductor - Diodes Division P4KA7.5AHE3/73
- Part No.:
- P4KA7.5AHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KA7.5AHE3/73.pdf
- Description:
- TVS DIODE 6.4VWM 11.3VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:3,713
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Product details
Overview
P4KA7.5AHE3/73 from Vishay General Semiconductor is a unidirectional automotive-grade transient voltage suppressor (TVS) diode in DO-41 package, with 7.13 V to 7.88 V breakdown voltage (VBR), 400 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for engine control units and sensor protection in 12 V automotive systems.
For engineers reviewing the P4KA7.5AHE3/73 datasheet, P4KA7.5AHE3/73 pinout, P4KA7.5AHE3/73 application, or P4KA7.5AHE3/73 equivalent, key selection criteria include clamping voltage (11.3 V at 500 A), low incremental surge resistance, high junction temperature rating (185 °C), and RoHS-compliant HE3 suffix meeting JESD201 Class 2 whisker test.
Technical Context
This TVS diode uses patented PAR® construction for stable clamping under repetitive transients and operates exclusively in unidirectional polarity, with cathode denoted by color band. Its 10/1000 µs waveform response supports IEC 61000-4-5 surge immunity compliance in automotive electronics.
Designed for high-reliability environments, it features 1.5 W steady-state power dissipation on infinite heatsink at 75 °C, 40 A peak forward surge current (8.3 ms half-sine), and 0.061 %/°C temperature coefficient of VBR, enabling predictable voltage clamping across -65 °C to +185 °C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 7.13 V / 7.88 V at 10 mA - defines precise clamping onset threshold for 12 V rail protection |
| VC @ IPPM | 11.3 V at 500 A - maximum clamped voltage during 400 W surge, limiting downstream IC stress |
| IPPM | 500 A (10/1000 µs) - peak surge current handling capacity for load-dump and ISO 7637-2 pulse 5a events |
| TJ max. | +185 °C - enables operation in under-hood ECUs without derating in high-ambient conditions |
| VWM | 6.40 V - stand-off voltage ensuring no conduction during normal 12 V system operation |
| Package | DO-204AL (DO-41) - industry-standard axial leaded package compatible with automated through-hole assembly |
Pinout & Package
DO-204AL (DO-41) molded epoxy package with matte tin-plated leads; cathode identified by color band. Leads solderable per J-STD-002 and JESD22-B102; HE3 suffix meets JESD201 Class 2 whisker test.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input side for transient energy absorption | Connected to protected line (e.g., battery feed); conducts during reverse-biased overvoltage |
| Cathode | Clamping reference node | Connected to ground or low-impedance return path; defines clamping voltage relative to this node |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables consistent clamping performance across 1000+ surge cycles without parameter drift |
| 400 W peak pulse power (10/1000 µs) | Meets ISO 7637-2 Pulse 5a requirements for 12 V automotive systems up to 500 A surge |
| AEC-Q101 qualified | Validated for automotive under-hood applications including engine control, transmission, and ADAS sensors |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns response time) |
| RoHS-compliant HE3 suffix | Ensures long-term reliability with JESD201 Class 2 whisker resistance for high-temperature soldering |
Applications
| Engine Control Unit (ECU) Power Input Protection | Automotive Sensor Signal Line Protection |
|---|---|
Use Scenario: Protects ECU microcontroller power rails from load-dump transients (ISO 7637-2 Pulse 5a) during alternator regulation failure. IC Role / Device Role / Timing Role: Unidirectional TVS clamps 12 V supply line to ≤11.3 V during 400 W surges, preventing MCU brownout or latch-up. Use Value: Enables robust operation at 185 °C junction temperature without derating, critical for under-hood placement. |
Use Scenario: Shields analog outputs of pressure/temperature sensors from inductive switching noise in HVAC or brake modules. IC Role / Device Role / Timing Role: Clamps signal lines (e.g., 0–5 V sensor output) to prevent ESD damage and false triggering during CAN bus activity. Use Value: 6.40 V stand-off voltage ensures zero leakage during normal operation while responding within nanoseconds to transients. |
| Body Control Module (BCM) LIN Bus Protection | ADAS Camera Power Rail Protection |
Use Scenario: Guards LIN transceiver inputs against coupled transients from adjacent 12 V loads like window motors or seat actuators. IC Role / Device Role / Timing Role: Acts as first-line defense on LIN bus VCC line, absorbing 500 A surges before reaching transceiver IC. Use Value: 0.061 %/°C VBR tempco maintains clamping accuracy across cabin temperature extremes (-40 °C to +85 °C). |
Use Scenario: Protects 5 V or 3.3 V camera module power input from ignition noise and start-stop system voltage spikes. IC Role / Device Role / Timing Role: Placed at camera PCB entry point to clamp transients before DC-DC converter and image sensor. Use Value: DO-41 package allows manual rework and fits constrained space near connector interface. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.5A | Lower PPPM (400 W same), but SMA package (SMT) vs. DO-41 (THT); VC = 12.0 V at 32.4 A | Requires PCB redesign for surface-mount assembly; unsuitable for through-hole legacy designs | Select when board space is constrained and reflow compatibility is required |
| P4KE7.5A | Same DO-41 package and VBR range, but lower PPPM (350 W); not AEC-Q101 qualified | Lacks automotive qualification; limited to industrial/commercial use only | Select only for non-automotive applications where AEC-Q101 is not mandated |
Compared with P4KA7.5AHE3/73, SMAJ7.5A offers SMT compatibility at the cost of higher clamping voltage and layout change, while P4KE7.5A sacrifices automotive reliability and surge margin for cost reduction in non-automotive settings.
Availability
P4KA7.5AHE3/73 is available at Aetrix Electronics and suitable for automotive engine control, body electronics, ADAS camera modules, and sensor interface circuits requiring stable component supply with full traceability and long-lifecycle support.
Supply support for P4KA7.5AHE3/73 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, and optoelectronics for automotive, industrial, and computing markets.
The P4KA7.5AHE3/73 belongs to Vishay's automotive TVS diode family engineered specifically for AEC-Q101 compliance, high-temperature stability, and robust transient suppression in 12 V vehicle electrical systems.
FAQ
What is the clamping voltage of the P4KA7.5AHE3/73 under peak surge conditions?
The P4KA7.5AHE3/73 has a maximum clamping voltage (VC) of 11.3 V at 500 A peak pulse current with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards and ensures protected circuits remain below critical voltage thresholds during ISO 7637-2 Pulse 5a events. The P4KA7.5AHE3/73 achieves this with low incremental surge resistance and patented PAR® construction.
Is the P4KA7.5AHE3/73 suitable for automotive under-hood applications?
Yes, the P4KA7.5AHE3/73 is AEC-Q101 qualified and rated for junction temperatures up to +185 °C, making it suitable for under-hood engine control units, transmission control modules, and other high-temperature automotive locations. Its DO-41 package withstands solder dip at 260 °C for 40 s, and the HE3 suffix confirms JESD201 Class 2 whisker resistance-both essential for automotive manufacturing reliability. The P4KA7.5AHE3/73 meets these requirements without derating.
How does the P4KA7.5AHE3/73 differ from the standard P4KA7.5A variant?
The P4KA7.5AHE3/73 includes the HE3 suffix, indicating RoHS compliance, high-reliability automotive grade, and qualification to JESD201 Class 2 for tin whisker resistance. It is supplied in 13" paper tape and reel (73 = 5500 pcs/reel), whereas P4KA7.5A may refer to bulk or different packaging. Both share identical electrical specs, but only P4KA7.5AHE3/73 carries full AEC-Q101 certification documentation and traceable automotive-grade sourcing. The P4KA7.5AHE3/73 is the designated part for production automotive BOMs.
What is the stand-off voltage (VWM) and why is it important for the P4KA7.5AHE3/73?
The P4KA7.5AHE3/73 has a stand-off voltage (VWM) of 6.40 V, meaning it remains non-conductive below this voltage-critical for reliable operation on nominal 12 V automotive systems where normal ripple stays well below 6.40 V. This prevents leakage current and power loss during steady-state operation while ensuring immediate clamping once transients exceed VBR (7.13–7.88 V). The P4KA7.5AHE3/73 uses this margin to avoid false triggering in noisy environments.
Can the P4KA7.5AHE3/73 be used in bidirectional configurations?
No, the P4KA7.5AHE3/73 is specified for unidirectional polarity only, as confirmed in the Vishay datasheet Document Number 88364. Its internal structure and test conditions assume cathode-to-ground orientation. For bidirectional protection, separate devices such as P4SMA12CA or dual-diode arrays must be used. Attempting to use the P4KA7.5AHE3/73 in reverse bias beyond its specified limits risks permanent degradation. The P4KA7.5AHE3/73 must be installed with the cathode band oriented toward the protected circuit's ground reference.
P4KA7.5AHE3/73 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):
- 6.4V
- Voltage - Breakdown (Min):
- 7.13V
- Voltage - Clamping (Max) @ Ipp:
- 11.3V
- Current - Peak Pulse (10/1000µs):
- 35.4A
- 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)
P4KA7.5AHE3/73 FAQ
1.How can I place an order for P4KA7.5AHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KA7.5AHE3/73 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 P4KA7.5AHE3/73 reliable?
The price and inventory of P4KA7.5AHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KA7.5AHE3/73 is usually 5 days.
3.What payment methods are accepted for P4KA7.5AHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KA7.5AHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KA7.5AHE3/73?
P4KA7.5AHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KA7.5AHE3/73 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 P4KA7.5AHE3/73?
For technical support, including P4KA7.5AHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KA7.5AHE3/73 requirements.
6.How does Aetrix verify that P4KA7.5AHE3/73 is sourced from the original manufacturer or authorized distributors?
All P4KA7.5AHE3/73 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 P4KA7.5AHE3/73 meets industry standards.
7.What is the process for return or replacement of P4KA7.5AHE3/73?
All P4KA7.5AHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with P4KA7.5AHE3/73, 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 P4KA7.5AHE3/73 part is unused and in its original packaging.
Return procedure for P4KA7.5AHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4KA7.5AHE3/73 Tags
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