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

Vishay General Semiconductor - Diodes Division P4KA8.2HE3/73

Name: P4KA8.2HE3/73
Brand: Vishay General Semiconductor - Diodes Division
SKU: P4KA8.2HE3/73
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: P4KA8.2HE3/73

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

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

Datasheet:: P4KA8.2HE3/73.pdf

Description:: TVS DIODE 6.63VWM 12.5VC DO204AL

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Product details

Overview

P4KA8.2HE3/73 from Vishay General Semiconductor is a unidirectional automotive-grade transient voltage suppressor (TVS) diode in DO-204AL (DO-41) package, with 8.2 V nominal breakdown voltage (V_BR: 7.38–9.02 V), 400 W peak pulse power (10/1000 µs), 12.5 V clamping voltage at 200 A, and AEC-Q101 qualification for engine control units and sensor protection in 12 V automotive systems.

For engineers reviewing the P4KA8.2HE3/73 datasheet, P4KA8.2HE3/73 pinout, P4KA8.2HE3/73 application, or P4KA8.2HE3/73 equivalent, key selection criteria include clamping performance under 200 A surge, thermal stability up to +185 °C junction temperature, RoHS-compliant matte tin leads, and JESD201 Class 2 whisker resistance - critical for under-hood electronics reliability.

Technical Context

This TVS diode operates as a unidirectional clamping device, leveraging patented PAR® construction to achieve low incremental surge resistance and sub-nanosecond response time during transient events. Its 10/1000 µs waveform rating reflects standardized IEC 61000-4-5 surge immunity testing conditions.

Designed for automotive environments, it supports continuous operation from −65 °C to +185 °C junction temperature, with derated peak pulse power above 25 °C ambient and stable V_BR temperature coefficient of 0.065 %/°C - enabling predictable overvoltage protection across wide thermal ranges.

Key Specifications

Parameter	Value and Actual Design Meaning
V_BR (min/max)	7.38 V / 9.02 V at 10 mA - defines reliable conduction onset window for 8.2 V nominal system rail protection
V_C @ I_PPM	12.5 V at 200 A - maximum clamped voltage during 400 W transient, limiting downstream IC stress
P_PPM	400 W (10/1000 µs) - sustains automotive load-dump and inductive switching surges without failure
I_FSM	40 A (8.3 ms half-sine) - handles repetitive motor commutation or relay coil energy discharge
T_J max.	+185 °C - enables placement near high-temperature engine compartments without derating loss
V_WM	6.63 V - stand-off voltage ensuring no leakage conduction during normal 5–6 V logic or sensor bias operation
Package	DO-204AL (DO-41) - industry-standard axial leaded form factor compatible with automated through-hole assembly

Pinout & Package

DO-204AL (DO-41) package: axial-leaded, molded epoxy case with cathode band marking; matte tin-plated leads compliant with J-STD-002 and JESD22-B102 solderability standards.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry point during forward conduction	Connected to protected circuit ground or low-side return path; enables unidirectional clamping to ground
Cathode	Current exit point during reverse-biased clamping	Connected to protected line (e.g., CAN_H, LIN, sensor supply); absorbs transients by shunting to ground

Key Features

Feature	Design Value
Patented PAR® construction	Enables uniform current distribution across junction area, reducing localized thermal runaway during multi-pulse events
AEC-Q101 qualification	Validated for automotive under-hood use via stress tests including HTOL, TCT, and ESD-HBM ≥ 8 kV
0.065 %/°C V_BR tempco	Ensures ≤ ±3 % V_BR shift over −40 °C to +125 °C ambient, maintaining design margin in engine bay
RoHS/WEEE compliance	Meets EU regulatory requirements with lead-free matte tin plating and UL 94 V-0 molding compound
10/1000 µs waveform rating	Aligned with ISO 7637-2 Pulse 1 & 2b test profiles for automotive electronic modules

Applications

Engine Control Unit (ECU) Power Input Protection	Automotive Sensor Signal Line Protection
Use Scenario: Protecting 12 V supply rails in engine control units against load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery feed and LDO input, conducting only during overvoltage events. Use Value: Limits transient voltage to ≤12.5 V at 200 A, preventing damage to MCU power management ICs rated for 16 V absolute max.	Use Scenario: Safeguarding analog output lines of pressure or temperature sensors exposed to inductive switching noise in chassis modules. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF) clamping element on signal path, referenced to sensor ground. Use Value: Maintains signal integrity with <1 µA leakage at 6.63 V stand-off while clamping ESD bursts to <13 V.
Body Control Module (BCM) LIN Bus Protection	Automotive Lighting Driver Output Protection
Use Scenario: Securing LIN bus transceivers against coupling transients from adjacent 12 V power circuits in door modules. IC Role / Device Role / Timing Role: Unidirectional TVS connected between LIN line and ground, absorbing common-mode surges. Use Value: Clamps induced spikes to ≤12.5 V within nanoseconds, preserving LIN physical layer timing margins (≤20 µs dominant timeout).	Use Scenario: Protecting MOSFET drain nodes in LED headlamp drivers from inductive kickback during PWM dimming. IC Role / Device Role / Timing Role: Snubber-style TVS across switch node and ground, activated only during off-state voltage overshoot. Use Value: Absorbs 400 W pulses without degradation, enabling compact heatsinkless driver designs rated for IP67 under-hood use.

Engine Control Unit (ECU) Power Input Protection

Automotive Sensor Signal Line Protection

Use Scenario: Protecting 12 V supply rails in engine control units against load dump (ISO 7637-2 Pulse 5a) and alternator ripple.

IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery feed and LDO input, conducting only during overvoltage events.

Use Value: Limits transient voltage to ≤12.5 V at 200 A, preventing damage to MCU power management ICs rated for 16 V absolute max.

Use Scenario: Safeguarding analog output lines of pressure or temperature sensors exposed to inductive switching noise in chassis modules.

IC Role / Device Role / Timing Role: Low-capacitance (<100 pF) clamping element on signal path, referenced to sensor ground.

Use Value: Maintains signal integrity with <1 µA leakage at 6.63 V stand-off while clamping ESD bursts to <13 V.

Body Control Module (BCM) LIN Bus Protection

Automotive Lighting Driver Output Protection

Use Scenario: Securing LIN bus transceivers against coupling transients from adjacent 12 V power circuits in door modules.

IC Role / Device Role / Timing Role: Unidirectional TVS connected between LIN line and ground, absorbing common-mode surges.

Use Value: Clamps induced spikes to ≤12.5 V within nanoseconds, preserving LIN physical layer timing margins (≤20 µs dominant timeout).

Use Scenario: Protecting MOSFET drain nodes in LED headlamp drivers from inductive kickback during PWM dimming.

IC Role / Device Role / Timing Role: Snubber-style TVS across switch node and ground, activated only during off-state voltage overshoot.

Use Value: Absorbs 400 W pulses without degradation, enabling compact heatsinkless driver designs rated for IP67 under-hood use.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMBJ8.0A-E3/52	Surface-mount SMB package; slightly lower V_BR (7.22–8.78 V); same 400 W rating but 100 A I_PPM (vs. 200 A)	Requires PCB rework for SMT vs. through-hole; lower surge current handling limits use in high-energy load-dump scenarios	Select when board space is constrained and peak surge currents remain ≤100 A
1.5KE8.2A	Higher power (1500 W), larger DO-201AD package; V_BR 7.13–8.61 V; slower thermal response due to higher junction-to-case resistance	Better for infrequent high-energy surges (e.g., jump-start events), but less suitable for repetitive switching noise in ECUs	Choose for cost-sensitive industrial applications where AEC-Q101 is not required and layout allows larger footprint

Compared with SMBJ8.0A-E3/52 and 1.5KE8.2A, P4KA8.2HE3/73 delivers superior surge current capacity (200 A) in an AEC-Q101-qualified through-hole package, making it optimal for high-reliability automotive power rail protection where mechanical robustness and thermal endurance are prioritized over miniaturization.

Availability

P4KA8.2HE3/73 is available at Aetrix Electronics and suitable for engine control units, body control modules, automotive sensor interfaces, and LED lighting drivers requiring stable component supply across extended temperature and high-surge environments.

Supply support for P4KA8.2HE3/73 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 automotive, industrial, and computing markets.

The P4KA series belongs to Vishay's automotive-grade TVS portfolio, engineered specifically for AEC-Q101 compliance and under-hood deployment - emphasizing thermal resilience, surge robustness, and long-term parametric stability in harsh electrical environments.

FAQ

What is the breakdown voltage range of the P4KA8.2HE3/73?

The P4KA8.2HE3/73 has a guaranteed breakdown voltage (V_BR) range of 7.38 V to 9.02 V at 10 mA test current, per Vishay Document 88364. This tolerance ensures reliable triggering across manufacturing lots and temperature extremes, supporting consistent overvoltage protection for 8.2 V nominal systems. The P4KA8.2HE3/73 maintains this specification under AEC-Q101 stress conditions.

Is the P4KA8.2HE3/73 suitable for bidirectional transient suppression?

No, the P4KA8.2HE3/73 is unidirectional only, as explicitly stated in the Vishay datasheet. It conducts in reverse bias to clamp positive transients to ground and blocks forward current above ~3.5 V. For bidirectional protection (e.g., AC lines or differential buses), a separate device such as the P4SMA8.2CA must be used. The P4KA8.2HE3/73 polarity is marked by a cathode band on the DO-41 body.

What is the maximum clamping voltage of the P4KA8.2HE3/73 at rated surge current?

The P4KA8.2HE3/73 clamps to a maximum of 12.5 V at its rated peak pulse current of 200 A (10/1000 µs waveform), per the Electrical Characteristics table in Vishay Document 88364. This value defines the upper voltage limit imposed on protected circuitry during worst-case surge events, directly informing safe operating margins for downstream ICs. The P4KA8.2HE3/73 achieves this with low incremental resistance inherent to its PAR® structure.

Does the P4KA8.2HE3/73 meet automotive qualification standards?

Yes, the P4KA8.2HE3/73 is AEC-Q101 qualified, as confirmed by the "Base P/NHE3 – RoHS compliant, high reliability/automotive grade (AEC Q101 qualified)" statement in the Mechanical Data section of Vishay Document 88364. This certification covers stress tests including high-temperature operating life, temperature cycling, and electrostatic discharge, validating its suitability for under-hood automotive applications. The P4KA8.2HE3/73 carries the HE3 suffix denoting this qualification level.

What packaging format is used for the P4KA8.2HE3/73?

The P4KA8.2HE3/73 is supplied in 13-inch diameter paper tape and reel packaging, with a base quantity of 5500 units per reel, as specified in the Ordering Information section of Vishay Document 88364. The "/73" suffix corresponds to this standard reel configuration. The device uses DO-204AL (DO-41) axial package with matte tin-plated leads compliant with J-STD-002 solderability requirements.

P4KA8.2HE3/73 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):: 6.63V

Voltage - Breakdown (Min):: 7.38V

Voltage - Clamping (Max) @ Ipp:: 12.5V

Current - Peak Pulse (10/1000µs):: 32A

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)

P4KA8.2HE3/73 FAQ

1.How can I place an order for P4KA8.2HE3/73 through Aetrix?

Please submit a Request for Quotation (RFQ) for P4KA8.2HE3/73 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 P4KA8.2HE3/73 reliable?

The price and inventory of P4KA8.2HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KA8.2HE3/73 is usually 5 days.

3.What payment methods are accepted for P4KA8.2HE3/73?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KA8.2HE3/73 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for P4KA8.2HE3/73?

P4KA8.2HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your P4KA8.2HE3/73 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 P4KA8.2HE3/73?

For technical support, including P4KA8.2HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KA8.2HE3/73 requirements.

6.How does Aetrix verify that P4KA8.2HE3/73 is sourced from the original manufacturer or authorized distributors?

All P4KA8.2HE3/73 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 P4KA8.2HE3/73 meets industry standards.

7.What is the process for return or replacement of P4KA8.2HE3/73?

All P4KA8.2HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with P4KA8.2HE3/73, 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 P4KA8.2HE3/73 part is unused and in its original packaging.

Return procedure for P4KA8.2HE3/73:

1.Submit a request within 90 days.

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

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