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Vishay General Semiconductor - Diodes Division P4KA22HE3/73
- Part No.:
- P4KA22HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KA22HE3/73.pdf
- Description:
- TVS DIODE 17.8VWM 31.9VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:2,997
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Product details
Overview
P4KA22HE3/73 from Vishay General Semiconductor is a unidirectional automotive-grade transient voltage suppressor (TVS) diode in DO-204AL (DO-41) package, featuring 400 W peak pulse power (10/1000 µs), 19.8–24.2 V breakdown voltage (VBR), and AEC-Q101 qualification for high-reliability protection of ICs and MOSFETs against inductive switching transients in automotive power circuits.
For engineers reviewing the P4KA22HE3/73 datasheet, P4KA22HE3/73 pinout, P4KA22HE3/73 application, or P4KA22HE3/73 equivalent, this page delivers verified electrical specs, clamping behavior at 12.5 A IPPM, thermal derating curves, RoHS-compliant construction, and direct alternatives for ESD/surge protection in 24 V vehicle subsystems.
Technical Context
The P4KA22HE3/73 employs Vishay's patented PAR® construction for stable clamping under repetitive surge stress and operates with low incremental surge resistance to minimize voltage overshoot during fast transients. Its unidirectional polarity and 1.0 VWM standoff voltage enable precise overvoltage thresholding in DC bias rails.
Designed for junction temperatures up to +185 °C and qualified per AEC-Q101, it supports automotive under-hood environments where thermal cycling and long-term reliability are critical. The device exhibits a +0.092 %/°C temperature coefficient of VBR, ensuring predictable voltage drift across operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 400 W - sustains single high-energy surges common in ISO 7637-2 Load Dump simulations |
| Breakdown Voltage VBR | 19.8–24.2 V at 1 mA - defines precise clamping onset for 24 V nominal systems |
| Clamping Voltage VC | 31.9 V at 12.5 A IPPM - limits downstream voltage stress during worst-case surge events |
| Standoff Voltage VWM | 17.8 V - ensures no conduction during normal 24 V rail operation with margin |
| Peak Forward Surge Current IFSM | 40 A (8.3 ms half-sine) - handles short-circuit fault currents without failure |
| Junction Temperature Range | −65 °C to +185 °C - validated for engine bay and transmission control unit mounting locations |
| RoHS & Whisker Compliance | HE3 suffix meets JESD201 Class 2 whisker test and RoHS 2002/95/EC - suitable for lead-free assembly |
Pinout & Package
Package: DO-204AL (DO-41), axial-leaded, molded epoxy case with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. Cathode denoted by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias | Connected to ground or lower-potential node in unidirectional TVS configuration |
| Cathode | Current exit point in forward bias; clamping terminal in reverse bias | Connected to protected line (e.g., 24 V supply rail); absorbs surge energy into ground path |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables consistent clamping performance over 1000+ surge cycles without parameter shift |
| 400 W peak pulse power (10/1000 µs) | Meets ISO 7637-2 Pulse 5a (Load Dump) requirements for 24 V automotive systems |
| AEC-Q101 qualification | Validated for automotive under-hood use including temperature cycling, humidity, and mechanical shock |
| Low incremental surge resistance | Minimizes VC – VBR differential, reducing voltage overshoot during fast transients |
| UL 94 V-0 molding compound | Prevents flame propagation in enclosed engine control modules and junction boxes |
Applications
| Engine Control Unit (ECU) Power Input Protection | Body Control Module (BCM) LIN Bus Line Protection |
|---|---|
|
Use Scenario: Protects 24 V supply input of engine control units from load dump transients up to 60 V and 100 ms duration. IC Role / Device Role / Timing Role: Unidirectional TVS clamps overvoltage before it reaches MCU power regulators and CAN transceivers. Use Value: Prevents latch-up or permanent damage to 5 V/3.3 V LDOs and microcontrollers during alternator disconnection events. |
Use Scenario: Shields LIN bus signal lines in body control modules from coupled transients from adjacent solenoid drivers. IC Role / Device Role / Timing Role: Fast-response TVS limits voltage excursions on 12 V LIN bus to <32 V, preserving signal integrity. Use Value: Maintains reliable LIN communication during door lock actuator switching without bus reset or timeout errors. |
| Transmission Control Module (TCM) Sensor Supply Rail | Electric Power Steering (EPS) Motor Driver Protection |
|
Use Scenario: Guards regulated 5 V sensor supply rails feeding crankshaft/camshaft position sensors in transmission control modules. IC Role / Device Role / Timing Role: TVS absorbs inductive kickback from nearby solenoid valves sharing same PCB ground plane. Use Value: Eliminates false sensor readings caused by transient-induced noise on analog sensor outputs. |
Use Scenario: Installed across H-bridge motor driver supply inputs in EPS systems to suppress flyback energy during PWM commutation. IC Role / Device Role / Timing Role: Absorbs regenerative current spikes from 3-phase BLDC motor windings during deceleration. Use Value: Prevents overvoltage failure of gate drivers and reduces need for oversized bulk capacitance on 12 V input stage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A-E3/5A (Vishay) | Same VBR range (19.8–24.2 V), but 400 W rating uses 8.3 ms waveform; lower IPPM (12.3 A vs. 12.5 A) | Surface-mount SMA package - requires rework for through-hole legacy designs | Select when board space is constrained and automated SMT assembly is available |
| 1.5KE22A (ON Semiconductor) | Higher VC (35.5 V at 11.4 A), larger DO-201AD package, non-AEC-Q101 rated | Lacks automotive qualification; suitable only for industrial/commercial 24 V systems | Choose only for cost-sensitive non-automotive applications where AEC-Q101 is not mandated |
Compared with SMAJ22A-E3/5A and 1.5KE22A, the P4KA22HE3/73 provides AEC-Q101 validation, tighter VC (31.9 V), and DO-41 compatibility for existing through-hole automotive harness interfaces - making it the preferred choice for OEM production of engine and chassis control modules.
Availability
P4KA22HE3/73 is available at Aetrix Electronics and suitable for automotive power distribution, engine management systems, and body electronics requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P4KA22HE3/73 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, rectifiers, and protection devices for demanding industrial and automotive applications.
The P4KA22HE3/73 belongs to Vishay's automotive TVS family engineered specifically for AEC-Q101 compliance and robust transient suppression in 12 V/24 V vehicle networks - targeting ECU, BCM, and ADAS subsystems.
FAQ
What is the clamping voltage of the P4KA22HE3/73 at its rated peak pulse current?
The P4KA22HE3/73 has a maximum clamping voltage (VC) of 31.9 V at 12.5 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is measured under defined test conditions per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for downstream 3.3 V or 5 V logic components in automotive applications. The P4KA22HE3/73 maintains this clamping performance across its full operating temperature range.
Is the P4KA22HE3/73 qualified for automotive use?
Yes, the P4KA22HE3/73 is AEC-Q101 qualified and designated as high-reliability/automotive grade (HE3 suffix). It undergoes rigorous stress testing including temperature cycling, humidity, mechanical shock, and surge endurance - all documented in Vishay's qualification report for the P4KAxx series. The P4KA22HE3/73 is approved for use in engine control units, transmission modules, and other safety-critical automotive subsystems.
What does the HE3 suffix indicate on the P4KA22HE3/73?
The HE3 suffix on the P4KA22HE3/73 denotes RoHS compliance, high-reliability construction, and qualification to JESD201 Class 2 for tin whisker mitigation. It confirms the device meets automotive-grade plating standards and is suitable for lead-free reflow and wave soldering processes. The HE3 marking is integral to the P4KA22HE3/73 part number and distinguishes it from commercial-grade variants.
Can the P4KA22HE3/73 be used in bidirectional configurations?
No, the P4KA22HE3/73 is available in uni-directional polarity only, as explicitly stated in the Vishay datasheet. Its internal structure and cathode-band marking support only reverse-bias clamping on positive transients. For bidirectional protection, two P4KA22HE3/73 devices must be connected in series opposing configuration - though Vishay offers dedicated bi-directional parts like the P4SMA22HE3 for such use cases.
What is the maximum junction temperature rating for the P4KA22HE3/73?
The P4KA22HE3/73 has a maximum junction temperature (TJ) rating of +185 °C, validated per AEC-Q101 test conditions. This enables reliable operation in under-hood environments such as near exhaust manifolds or within transmission control modules. Derating curves in the datasheet show usable power dissipation down to zero at 175 °C ambient, confirming the P4KA22HE3/73's suitability for high-temperature automotive deployment.
P4KA22HE3/73 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):
- 17.8V
- Voltage - Breakdown (Min):
- 19.8V
- Voltage - Clamping (Max) @ Ipp:
- 31.9V
- Current - Peak Pulse (10/1000µs):
- 12.5A
- 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)
P4KA22HE3/73 FAQ
1.How can I place an order for P4KA22HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KA22HE3/73 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 P4KA22HE3/73 reliable?
The price and inventory of P4KA22HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KA22HE3/73 is usually 5 days.
3.What payment methods are accepted for P4KA22HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KA22HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KA22HE3/73?
P4KA22HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KA22HE3/73 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 P4KA22HE3/73?
For technical support, including P4KA22HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KA22HE3/73 requirements.
6.How does Aetrix verify that P4KA22HE3/73 is sourced from the original manufacturer or authorized distributors?
All P4KA22HE3/73 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 P4KA22HE3/73 meets industry standards.
7.What is the process for return or replacement of P4KA22HE3/73?
All P4KA22HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with P4KA22HE3/73, 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 P4KA22HE3/73 part is unused and in its original packaging.
Return procedure for P4KA22HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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