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Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > TVS Diodes

Vishay General Semiconductor - Diodes Division P4KA9.1HE3/54

Name: P4KA9.1HE3/54
Brand: Vishay General Semiconductor - Diodes Division
SKU: P4KA9.1HE3/54
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: P4KA9.1HE3/54

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

Package:: DO-204AL, DO-41, Axial

Datasheet:: P4KA9.1HE3/54.pdf

Description:: TVS DIODE 7.37VWM 13.8VC DO204AL

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Product details

Overview

P4KA9.1HE3/54 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), 13.8 V clamping voltage at 29.0 A surge current, and 8.19–10.0 V breakdown voltage at 1.0 mA test current. It protects MOSFETs, ICs, and sensor signal lines in automotive powertrain control modules against inductive switching transients.

For engineers reviewing the P4KA9.1HE3/54 datasheet, P4KA9.1HE3/54 pinout, P4KA9.1HE3/54 application, or P4KA9.1HE3/54 equivalent, key selection criteria include its AEC-Q101 qualification, 185 °C max junction temperature, 0.068 %/°C V_BR temperature coefficient, low 7.37 V stand-off voltage, and RoHS-compliant HE3 high-reliability lead finish.

Technical Context

The P4KA9.1HE3/54 employs Vishay's patented PAR® construction for stable clamping under repetitive surge conditions and operates exclusively in unidirectional polarity with cathode indicated by color band. Its 10/1000 µs waveform response delivers consistent 13.8 V clamping at 29.0 A IPPM while maintaining <10 µA reverse leakage at 7.37 V V_WM up to 150 °C.

Designed for high-temperature reliability, it supports continuous operation from –65 °C to +185 °C junction temperature, with 1.5 W steady-state power dissipation on infinite heatsink at 75 °C lead temperature and 40 A non-repetitive forward surge rating per 8.3 ms half-sine wave.

Key Specifications

Parameter	Value and Actual Design Meaning
Breakdown Voltage V_BR	8.19–10.0 V at 1.0 mA - defines minimum voltage at which TVS begins conduction during overvoltage events
Clamping Voltage V_C	13.8 V at 29.0 A IPPM - maximum voltage seen by protected circuit during 10/1000 µs surge
Peak Pulse Power PPPM	400 W (10/1000 µs) - energy-handling capacity for transient suppression without failure
Stand-off Voltage V_WM	7.37 V - maximum continuous reverse operating voltage before leakage exceeds 10 µA
Junction Temperature Range	–65 °C to +185 °C - enables use in under-hood automotive environments without derating
Temperature Coefficient of V_BR	0.068 %/°C - ensures predictable voltage shift across temperature for stable protection threshold
AEC-Q101 Qualified	Yes - validated for automotive electronic systems per stress test requirements including HTGB, HTRB, and TCT

Pinout & Package

Package: DO-204AL (DO-41), axial-leaded, molded epoxy case meeting UL 94 V-0 flammability rating; matte tin-plated leads compliant with J-STD-002 and JESD22-B102 solderability standards; HE3 suffix indicates JESD201 Class 2 whisker resistance.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal	Connected to ground or lower-potential rail in unidirectional TVS configuration
Cathode	Reverse-biased clamping terminal	Marked with color band; connected to protected line to clamp positive transients to V_C

Key Features

Feature	Design Value
Patented PAR® construction	Enables stable clamping performance and low incremental surge resistance under repeated transient stress
400 W peak pulse power (10/1000 µs)	Provides robust protection against ISO 7637-2 Pulse 1, 2a, and 5a automotive transients
AEC-Q101 qualified (HE3 grade)	Validated for automotive powertrain, body electronics, and ADAS subsystems requiring high reliability
Low 7.37 V stand-off voltage	Allows safe operation below 8 V supply rails while retaining margin above nominal system voltage
185 °C max junction temperature	Supports placement near heat sources (e.g., engine control units) without thermal derating

Applications

Automotive Engine Control Unit (ECU)	Industrial Motor Drive I/O Protection
Use Scenario: Protecting microcontroller GPIO and CAN transceiver pins from load dump and inductive kickback in 12 V powertrain ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between signal line and chassis ground. Use Value: Limits transient voltage to ≤13.8 V during 400 W surges, preventing latch-up or gate oxide damage in 3.3 V/5 V logic interfaces.	Use Scenario: Safeguarding analog input channels and encoder feedback lines in variable-frequency drives exposed to relay coil switching noise. IC Role / Device Role / Timing Role: Standoff-clamped transient suppressor on differential sensor inputs referenced to isolated ground. Use Value: Maintains 7.37 V working voltage margin while clamping fast-rising spikes (<1 ns rise time) to preserve ADC accuracy and timing integrity.
Automotive Body Control Module (BCM)	Telecom Power Supply Input Stage
Use Scenario: Shielding LIN bus transceivers and LED driver FET gates from battery reverse connection and jump-start surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V supply rail feeding multiple low-voltage regulators. Use Value: Withstands 40 A I_FSM single-event surge and maintains <10 µA leakage at 7.37 V, ensuring low quiescent current in always-on modules.	Use Scenario: Front-end protection for AC/DC adapter inputs subjected to lightning-induced surges per IEC 61000-4-5 Level 3. IC Role / Device Role / Timing Role: Secondary-stage TVS after MOV, providing precise clamping where fast response and low V_C are critical. Use Value: Delivers 13.8 V clamping at 29 A with 0.068 %/°C V_BR stability-reducing downstream voltage overshoot versus generic 9.1 V Zeners.

Automotive Engine Control Unit (ECU)

Industrial Motor Drive I/O Protection

Use Scenario: Protecting microcontroller GPIO and CAN transceiver pins from load dump and inductive kickback in 12 V powertrain ECUs.

IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between signal line and chassis ground.

Use Value: Limits transient voltage to ≤13.8 V during 400 W surges, preventing latch-up or gate oxide damage in 3.3 V/5 V logic interfaces.

Use Scenario: Safeguarding analog input channels and encoder feedback lines in variable-frequency drives exposed to relay coil switching noise.

IC Role / Device Role / Timing Role: Standoff-clamped transient suppressor on differential sensor inputs referenced to isolated ground.

Use Value: Maintains 7.37 V working voltage margin while clamping fast-rising spikes (<1 ns rise time) to preserve ADC accuracy and timing integrity.

Automotive Body Control Module (BCM)

Telecom Power Supply Input Stage

Use Scenario: Shielding LIN bus transceivers and LED driver FET gates from battery reverse connection and jump-start surges.

IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V supply rail feeding multiple low-voltage regulators.

Use Value: Withstands 40 A I_FSM single-event surge and maintains <10 µA leakage at 7.37 V, ensuring low quiescent current in always-on modules.

Use Scenario: Front-end protection for AC/DC adapter inputs subjected to lightning-induced surges per IEC 61000-4-5 Level 3.

IC Role / Device Role / Timing Role: Secondary-stage TVS after MOV, providing precise clamping where fast response and low V_C are critical.

Use Value: Delivers 13.8 V clamping at 29 A with 0.068 %/°C V_BR stability-reducing downstream voltage overshoot versus generic 9.1 V Zeners.

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient voltage suppression applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMBJ9.0A	Surface-mount SMB package; 9.0 V nominal V_BR; 14.4 V V_C at 27.8 A; same 400 W PPPM rating	Requires PCB re-layout; better suited for space-constrained board-level protection vs. through-hole wiring harness interfaces	Select when automated assembly and higher board density are priorities over serviceability or wire termination
P4KE9.1A	Legacy through-hole DO-15 package; 9.1 V V_BR; 13.4 V V_C at 29.9 A; not AEC-Q101 qualified; 150 °C T_J max	Lacks automotive qualification and high-temp capability; suitable only for industrial/commercial grade designs	Choose only for cost-sensitive non-automotive applications where 185 °C operation and AEC validation are unnecessary

Compared with SMBJ9.0A and P4KE9.1A, the P4KA9.1HE3/54 uniquely combines AEC-Q101 qualification, 185 °C junction rating, and DO-41 mechanical robustness-making it the sole option for under-hood automotive TVS applications requiring long-term reliability under thermal cycling and vibration.

Availability

P4KA9.1HE3/54 is available at Aetrix Electronics and suitable for automotive ECU design, industrial motor drive protection, and telecom power supply hardening requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for P4KA9.1HE3/54 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, TVS devices, and optoelectronics with emphasis on reliability, precision, and automotive-grade qualification.

The P4KA9.1HE3/54 belongs to Vishay's automotive TVS diode family engineered specifically for harsh-environment transient suppression in 12 V and 24 V vehicle electrical systems, with focus on AEC-Q101 compliance and high-temperature operational stability.

FAQ

What is the exact breakdown voltage range for P4KA9.1HE3/54 at 1.0 mA test current?

The P4KA9.1HE3/54 has a guaranteed breakdown voltage (V_BR) range of 8.19 V to 10.0 V when measured at 1.0 mA test current, per Vishay Document Number 88364, Revision 21-Oct-08. This range reflects manufacturing tolerance and ensures reliable turn-on behavior across production lots while maintaining compatibility with 7.37 V stand-off voltage requirements.

Is P4KA9.1HE3/54 suitable for bidirectional transient suppression?

No, the P4KA9.1HE3/54 is unidirectional only, as explicitly stated in the Vishay datasheet. It features a cathode band marking and is designed to clamp positive-going transients on a line referenced to ground. For bidirectional protection, a separate device such as the P4SMA9.1CA or dual-diode configuration would be required-not the P4KA9.1HE3/54.

Does P4KA9.1HE3/54 meet automotive qualification standards?

Yes, the P4KA9.1HE3/54 is AEC-Q101 qualified per the HE3 suffix designation, confirming compliance with stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling (TCT). This makes the P4KA9.1HE3/54 appropriate for automotive powertrain, body electronics, and ADAS applications where long-term reliability under thermal and mechanical stress is mandatory.

What is the maximum clamping voltage of P4KA9.1HE3/54 during a 10/1000 µs surge event?

The maximum clamping voltage (V_C) of the P4KA9.1HE3/54 is 13.8 V at 29.0 A peak pulse current (I_PPM) under the standard 10/1000 µs waveform, as specified in the Electrical Characteristics table of Vishay Document 88364. This value represents the worst-case voltage imposed on the protected circuit during full-rated surge conditions.

Can P4KA9.1HE3/54 be used in place of P4KA9.1A in a design?

Yes, the P4KA9.1HE3/54 is the RoHS-compliant, high-reliability automotive-grade version of P4KA9.1A, sharing identical electrical specifications (V_BR, V_C, I_PPM, etc.) and DO-41 packaging. The HE3 suffix adds JESD201 Class 2 whisker resistance and AEC-Q101 qualification-making the P4KA9.1HE3/54 a direct upgrade path for new designs requiring enhanced reliability and regulatory compliance.

P4KA9.1HE3/54 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Package/Case:: DO-204AL, DO-41, Axial

Series:: PAR®

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Type:: Zener

Unidirectional Channels:: 1

Bidirectional Channels:: -

Voltage - Reverse Standoff (Typ):: 7.37V

Voltage - Breakdown (Min):: 8.19V

Voltage - Clamping (Max) @ Ipp:: 13.8V

Current - Peak Pulse (10/1000µs):: 29A

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)

P4KA9.1HE3/54 FAQ

1.How can I place an order for P4KA9.1HE3/54 through Aetrix?

Please submit a Request for Quotation (RFQ) for P4KA9.1HE3/54 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 P4KA9.1HE3/54 reliable?

The price and inventory of P4KA9.1HE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KA9.1HE3/54 is usually 5 days.

3.What payment methods are accepted for P4KA9.1HE3/54?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KA9.1HE3/54 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for P4KA9.1HE3/54?

P4KA9.1HE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your P4KA9.1HE3/54 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 P4KA9.1HE3/54?

For technical support, including P4KA9.1HE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KA9.1HE3/54 requirements.

6.How does Aetrix verify that P4KA9.1HE3/54 is sourced from the original manufacturer or authorized distributors?

All P4KA9.1HE3/54 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 P4KA9.1HE3/54 meets industry standards.

7.What is the process for return or replacement of P4KA9.1HE3/54?

All P4KA9.1HE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with P4KA9.1HE3/54, 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 P4KA9.1HE3/54 part is unused and in its original packaging.

Return procedure for P4KA9.1HE3/54:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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