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

Vishay General Semiconductor - Diodes Division P4KA24AHE3/54

Name: P4KA24AHE3/54
Brand: Vishay General Semiconductor - Diodes Division
SKU: P4KA24AHE3/54
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: P4KA24AHE3/54

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

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

Datasheet:: P4KA24AHE3/54.pdf

Description:: TVS DIODE 20.5VWM 33.2VC DO204AL

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Product details

Overview

P4KA24AHE3/54 from Vishay General Semiconductor is a unidirectional automotive-grade transient voltage suppressor (TVS) diode in DO-204AL (DO-41) package, with 22.8 V to 25.2 V breakdown voltage (V_BR), 33.2 V clamping voltage (V_C) at 12.0 A peak pulse current, 400 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for under-hood electronics protection.

For engineers reviewing the P4KA24AHE3/54 datasheet, P4KA24AHE3/54 pinout, P4KA24AHE3/54 application, or P4KA24AHE3/54 equivalent, key selection criteria include clamping performance under 12 V automotive load-dump transients, high-temperature junction stability up to +185 °C, RoHS-compliant matte tin leads, and JESD201 Class 2 whisker resistance.

Technical Context

This TVS diode employs Vishay's patented PAR® construction for low incremental surge resistance and fast response (<1 ns), enabling effective suppression of inductive switching spikes and ISO 7637-2 pulse 1/2a/5a transients in 12 V vehicle systems. Its unidirectional polarity and 20.5 V stand-off voltage (V_WM) allow direct placement across protected IC power rails or signal lines without reverse-bias leakage concerns.

Designed for high-reliability automotive environments, the device maintains stable V_BR temperature coefficient (0.094 %/°C) and derates linearly above 25 °C ambient, supporting operation at junction temperatures up to +185 °C - critical for engine control units, body controllers, and ADAS sensor interfaces exposed to under-hood thermal stress.

Key Specifications

Parameter	Value and Actual Design Meaning
Breakdown Voltage V_BR	22.8 V min / 25.2 V max at 1.0 mA - defines precise overvoltage triggering threshold for 12 V system protection
Clamping Voltage V_C	33.2 V at 12.0 A IPPM - limits downstream voltage during 400 W transient, staying below 36 V absolute max for common automotive ICs
Peak Pulse Power PPPM	400 W (10/1000 µs waveform) - sustains standard ISO 7637-2 load-dump energy without failure
Stand-off Voltage V_WM	20.5 V - ensures no conduction during normal 12 V nominal + tolerance operation (e.g., battery charging at 14.4 V)
Junction Temperature Range	–65 °C to +185 °C - enables deployment in engine bay, transmission control, or front-end radar modules
AEC-Q101 Qualification	Qualified per stress test requirements - validates reliability for automotive production use, not just industrial grade

Pinout & Package

Package: DO-204AL (DO-41), axial-leaded, molded epoxy case meeting UL 94 V-0; cathode indicated by color band on body; matte tin-plated leads compliant with J-STD-002 and JESD22-B102.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Low-side connection in unidirectional TVS configuration	Connected to ground or low-impedance return path; carries full surge current during clamping
Cathode	High-side connection; marked by color band	Connected to protected line (e.g., 12 V rail or CAN-H); initiates avalanche conduction when V_WM exceeded

Key Features

Feature	Design Value
Patented PAR® construction	Reduces incremental surge resistance for tighter clamping and lower let-through voltage during fast transients
AEC-Q101 qualification (HE3 suffix)	Validated for automotive production use including temperature cycling, HTRB, and ESD robustness per JEDEC standards
JESD201 Class 2 whisker resistance	Prevents tin whisker growth under thermal/humidity stress - essential for long-life automotive modules
10/1000 µs waveform rating	Matches ISO 7637-2 Pulse 5a (load dump) test profile, enabling direct compliance verification

Applications

Engine Control Unit (ECU) Power Input Protection	Automotive Body Control Module (BCM) Signal Line Protection
Use Scenario: Protects microcontroller power supply against load-dump transients (ISO 7637-2 Pulse 5a) during alternator regulation failure in 12 V gasoline/diesel vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor; clamps within nanoseconds to limit voltage to ≤33.2 V. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic supplies and analog front-ends in ECUs operating up to +125 °C ambient.	Use Scenario: Shields LIN bus or switch-input lines in BCMs from inductive kickback generated by door lock actuators, mirror motors, and lamp drivers. IC Role / Device Role / Timing Role: TVS connected anode-to-ground, cathode-to-signal line; absorbs repetitive 100 V/500 ms pulses without degradation. Use Value: Maintains signal integrity and prevents false wake-up or reset events in low-voltage digital inputs rated for ≤25 V absolute max.
Radar Sensor Module Power Rail Protection	ADAS Camera Power Supply Clamping
Use Scenario: Safeguards 5 V/3.3 V power domains in 77 GHz radar modules exposed to under-hood thermal cycling and EMI-coupled transients. IC Role / Device Role / Timing Role: Mounted adjacent to DC/DC converter output; clamps fast-rising spikes (<1 ns) induced by nearby RF power stages or switching regulators. Use Value: Enables reliable operation at junction temperatures up to +185 °C while maintaining <1 µA leakage at 20.5 V - critical for low-noise RF front-ends.	Use Scenario: Suppresses voltage overshoot on camera module power lines during hot-plug insertion or power sequencing in rear-view or surround-view systems. IC Role / Device Role / Timing Role: Placed at connector entry point; conducts surge current away from image sensor and serializer ICs during cable discharge events. Use Value: Limits clamped voltage to 33.2 V - well below 36 V absolute maximum rating of common MIPI CSI-2 interface ICs and image sensors.

Engine Control Unit (ECU) Power Input Protection

Automotive Body Control Module (BCM) Signal Line Protection

Use Scenario: Protects microcontroller power supply against load-dump transients (ISO 7637-2 Pulse 5a) during alternator regulation failure in 12 V gasoline/diesel vehicles.

IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor; clamps within nanoseconds to limit voltage to ≤33.2 V.

Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic supplies and analog front-ends in ECUs operating up to +125 °C ambient.

Use Scenario: Shields LIN bus or switch-input lines in BCMs from inductive kickback generated by door lock actuators, mirror motors, and lamp drivers.

IC Role / Device Role / Timing Role: TVS connected anode-to-ground, cathode-to-signal line; absorbs repetitive 100 V/500 ms pulses without degradation.

Use Value: Maintains signal integrity and prevents false wake-up or reset events in low-voltage digital inputs rated for ≤25 V absolute max.

Radar Sensor Module Power Rail Protection

ADAS Camera Power Supply Clamping

Use Scenario: Safeguards 5 V/3.3 V power domains in 77 GHz radar modules exposed to under-hood thermal cycling and EMI-coupled transients.

IC Role / Device Role / Timing Role: Mounted adjacent to DC/DC converter output; clamps fast-rising spikes (<1 ns) induced by nearby RF power stages or switching regulators.

Use Value: Enables reliable operation at junction temperatures up to +185 °C while maintaining <1 µA leakage at 20.5 V - critical for low-noise RF front-ends.

Use Scenario: Suppresses voltage overshoot on camera module power lines during hot-plug insertion or power sequencing in rear-view or surround-view systems.

IC Role / Device Role / Timing Role: Placed at connector entry point; conducts surge current away from image sensor and serializer ICs during cable discharge events.

Use Value: Limits clamped voltage to 33.2 V - well below 36 V absolute maximum rating of common MIPI CSI-2 interface ICs and image sensors.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMAJ24A	Same V_BR range (22.8–25.2 V), but 400 W rating uses 8.3 ms half-sine waveform; lower I_PPM (12.3 A vs. 12.0 A); no AEC-Q101 or JESD201 Class 2 certification	Rated for industrial/commercial use only; not validated for automotive thermal cycling or long-term whisker resistance	Select SMAJ24A only for non-automotive designs where cost is prioritized over automotive qualification and long-term field reliability
1.5KE24A	Higher V_C (38.9 V), larger DO-201 package (5.3 mm diameter), 1.5 kW rating - over-specified for 400 W needs; no AEC-Q101 or HE3 suffix	Designed for higher-energy transients; less suitable for space-constrained PCB layouts in modern ECUs or sensors	Choose 1.5KE24A only when legacy board space allows DO-201 and system-level testing confirms 38.9 V clamping is acceptable for protected ICs

Compared with SMAJ24A and 1.5KE24A, the P4KA24AHE3/54 delivers automotive-grade reliability in a compact DO-41 outline, with verified clamping performance at elevated temperature and certified resistance to tin whiskers - making it the preferred choice for new automotive designs requiring AEC-Q101 compliance and long-term field stability.

Availability

P4KA24AHE3/54 is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, and ADAS sensor power protection requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for P4KA24AHE3/54 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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.

The P4KA series belongs to Vishay's automotive TVS portfolio, engineered specifically to meet AEC-Q101 requirements and suppress ISO 7637-2 transients in 12 V and 24 V vehicle electrical systems.

FAQ

What is the clamping voltage of the P4KA24AHE3/54 at its rated peak pulse current?

The P4KA24AHE3/54 has a maximum clamping voltage (V_C) of 33.2 V at 12.0 A peak pulse current (I_PPM) under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected circuitry sees no more than 33.2 V during a 400 W transient event. The P4KA24AHE3/54 maintains this clamping performance across its qualified temperature range, supporting robust design margins for 12 V automotive ICs.

Is the P4KA24AHE3/54 suitable for 24 V commercial vehicle applications?

The P4KA24AHE3/54 is specified for 12 V system protection with a 20.5 V stand-off voltage (V_WM) and 22.8–25.2 V breakdown range - making it unsuitable for direct use on nominal 24 V rails, where V_WM must exceed 27.6 V to avoid leakage. For 24 V systems, Vishay offers higher-voltage variants like P4KA36AHE3/54 (V_WM = 30.8 V). The P4KA24AHE3/54 remains appropriate only for 12 V subsystems within 24 V vehicles, such as infotainment or lighting modules.

Does the P4KA24AHE3/54 have bidirectional polarity capability?

No, the P4KA24AHE3/54 is unidirectional only, as confirmed in the "FEATURES" section of Vishay document 88364. It functions as a single-junction avalanche diode with cathode marked by a color band and must be oriented anode-to-ground to protect positive-going transients. Bidirectional protection requires two devices or a dedicated bidirectional TVS like the P4SMA24AHE3/54 - the P4KA24AHE3/54 does not support reverse-polarity surge suppression.

What packaging format is supplied for the P4KA24AHE3/54?

The P4KA24AHE3/54 is supplied in 13-inch diameter paper tape and reel packaging, with a base quantity of 5500 pieces per reel (package code "54"). This format supports automated SMT placement via axial lead feeders and complies with EIA-481 standards. The "HE3" suffix confirms RoHS compliance, high-reliability construction, and AEC-Q101 qualification - all verified on the delivered reel label and material certifications.

How does the temperature coefficient of V_BR affect performance of the P4KA24AHE3/54 in under-hood applications?

The P4KA24AHE3/54 has a V_BR temperature coefficient of +0.094 %/°C, meaning breakdown voltage increases ~22 mV/°C above 25 °C. At +150 °C junction temperature, V_BR rises by ~11.7 V - keeping the upper limit within 36.9 V. This predictable positive drift ensures consistent clamping behavior across the full –65 °C to +185 °C range, unlike negative-coefficient devices that may fail to trigger at high temperature. The P4KA24AHE3/54 thus provides stable protection in engine control units and radar modules.

P4KA24AHE3/54 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):: 20.5V

Voltage - Breakdown (Min):: 22.8V

Voltage - Clamping (Max) @ Ipp:: 33.2V

Current - Peak Pulse (10/1000µs):: 12A

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)

P4KA24AHE3/54 FAQ

1.How can I place an order for P4KA24AHE3/54 through Aetrix?

Please submit a Request for Quotation (RFQ) for P4KA24AHE3/54 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 P4KA24AHE3/54 reliable?

The price and inventory of P4KA24AHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KA24AHE3/54 is usually 5 days.

3.What payment methods are accepted for P4KA24AHE3/54?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KA24AHE3/54 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for P4KA24AHE3/54?

P4KA24AHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your P4KA24AHE3/54 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 P4KA24AHE3/54?

For technical support, including P4KA24AHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KA24AHE3/54 requirements.

6.How does Aetrix verify that P4KA24AHE3/54 is sourced from the original manufacturer or authorized distributors?

All P4KA24AHE3/54 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 P4KA24AHE3/54 meets industry standards.

7.What is the process for return or replacement of P4KA24AHE3/54?

All P4KA24AHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with P4KA24AHE3/54, 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 P4KA24AHE3/54 part is unused and in its original packaging.

Return procedure for P4KA24AHE3/54:

1.Submit a request within 90 days.

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

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