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

Vishay General Semiconductor - Diodes Division P4KE39A-E3/54

Name: P4KE39A-E3/54
Brand: Vishay General Semiconductor - Diodes Division
SKU: P4KE39A-E3/54
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: P4KE39A-E3/54

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

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

Datasheet:: P4KE39A-E3/54.pdf

Description:: TVS DIODE 33.3VWM 53.9VC DO204AL

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Product details

Overview

P4KE39A-E3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-41 package, designed for circuit-level overvoltage protection. It features a 33.3 V standoff voltage (V_WM), 37.1–41.0 V breakdown range (V_BR at 1.0 mA), 53.9 V clamping voltage at 7.4 A peak pulse current, 400 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for automotive-grade reliability.

For engineers reviewing the P4KE39A-E3/54 datasheet, P4KE39A-E3/54 pinout, P4KE39A-E3/54 application, or P4KE39A-E3/54 equivalent, key selection criteria include clamping performance under 10/1000 μs transients, unidirectional polarity marking, DO-41 leaded package compatibility with through-hole PCB layouts, and compliance with IEC 61000-4-5 surge immunity requirements.

Technical Context

This TVS diode operates as a voltage-clamping protection device that remains high-impedance below V_WM (33.3 V) and rapidly avalanches above V_BR (min 37.1 V) to limit transient energy. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at V_WM).

It delivers 400 W peak pulse power handling with a 10/1000 μs waveform at 0.01% duty cycle, exhibits fast response time (<1.0 ns), and maintains thermal stability up to 175 °C junction temperature. The matte tin-plated leads meet J-STD-002 solderability and JESD 201 Class 1A whisker resistance standards.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	33.3 V - Maximum continuous reverse operating voltage before conduction begins
V_BR (min/max)	37.1 V / 41.0 V at 1.0 mA - Confirmed avalanche onset range for reliable clamping threshold
V_C @ I_PPM	53.9 V at 7.4 A - Clamped voltage during 400 W transient, defining protected circuit's max stress level
P_PPM	400 W - Peak surge power dissipation capability with standard 10/1000 μs waveform
I_FSM	40 A - Non-repetitive forward surge rating (8.3 ms half-sine), critical for inductive switch-off events
T_J max	175 °C - Maximum junction temperature enabling operation in under-hood automotive environments
Leakage I_D	<1.0 μA at V_WM - Negligible standby current, preserving signal integrity and battery life

Pinout & Package

DO-41 (DO-204AL) molded epoxy package with axial leads; cathode indicated by color band on unidirectional devices like P4KE39A-E3/54. Body length 4.1–5.2 mm, lead diameter 0.71–0.86 mm, lead spacing 9.5 mm minimum.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry / transient return path	Connected to ground or low-impedance reference in unidirectional clamp configuration
Cathode	Reverse-biased terminal / clamping node	Connected to protected line (e.g., power rail or signal); color band identifies this end

Key Features

Feature	Design Value
Glass passivated junction	Ensures stable V_BR tolerance and long-term reliability under thermal cycling and humidity
400 W peak pulse power (10/1000 μs)	Protects against IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) without degradation
AEC-Q101 qualified (E3 suffix variant)	Validated for automotive powertrain and body electronics per stress test requirements
Low incremental surge resistance	Minimizes clamping voltage overshoot during fast-rising transients (e.g., load dump, ESD)
UL 94 V-0 compliant molding compound	Meets flammability safety requirements for enclosed industrial and automotive enclosures

Applications

Automotive Power Line Protection	Industrial Sensor Interface Protection
Use Scenario: Protecting 36 V battery-fed ECUs from load dump transients up to 60 V and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp surges before LDO or MCU power pins. Use Value: Limits peak voltage to 53.9 V at 7.4 A, preventing damage to downstream 40 V-rated regulators and microcontrollers.	Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation systems. IC Role / Device Role / Timing Role: Low-capacitance TVS connected across differential signal pair or single-ended output to ground. Use Value: Sub-1 μA leakage preserves mV-level signal accuracy; 53.9 V clamping prevents op-amp input stage latch-up during ±8 kV contact ESD.
Telecom DC Power Feeds	Consumer Device USB Port Protection
Use Scenario: Safeguarding PoE-powered equipment (e.g., IP cameras) from induced surges on 48 V DC supply lines. IC Role / Device Role / Timing Role: Primary surge clamp on input side of DC-DC converter, coordinated with secondary-side TVS for staged protection. Use Value: Withstands repetitive 400 W transients while maintaining <1.0 μA leakage-critical for always-on remote devices.	Use Scenario: Adding robustness to USB-C VBUS lines in portable chargers and docking stations exposed to hot-plug and cable-induced spikes. IC Role / Device Role / Timing Role: Standoff voltage (33.3 V) exceeds USB PD 3.0 max 20 V, enabling safe placement upstream of buck converters. Use Value: 53.9 V clamping ensures no overvoltage reaches USB controller ICs rated for 36 V absolute maximum.

Automotive Power Line Protection

Industrial Sensor Interface Protection

Use Scenario: Protecting 36 V battery-fed ECUs from load dump transients up to 60 V and ISO 7637-2 pulses.

IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp surges before LDO or MCU power pins.

Use Value: Limits peak voltage to 53.9 V at 7.4 A, preventing damage to downstream 40 V-rated regulators and microcontrollers.

Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation systems.

IC Role / Device Role / Timing Role: Low-capacitance TVS connected across differential signal pair or single-ended output to ground.

Use Value: Sub-1 μA leakage preserves mV-level signal accuracy; 53.9 V clamping prevents op-amp input stage latch-up during ±8 kV contact ESD.

Telecom DC Power Feeds

Consumer Device USB Port Protection

Use Scenario: Safeguarding PoE-powered equipment (e.g., IP cameras) from induced surges on 48 V DC supply lines.

IC Role / Device Role / Timing Role: Primary surge clamp on input side of DC-DC converter, coordinated with secondary-side TVS for staged protection.

Use Value: Withstands repetitive 400 W transients while maintaining <1.0 μA leakage-critical for always-on remote devices.

Use Scenario: Adding robustness to USB-C VBUS lines in portable chargers and docking stations exposed to hot-plug and cable-induced spikes.

IC Role / Device Role / Timing Role: Standoff voltage (33.3 V) exceeds USB PD 3.0 max 20 V, enabling safe placement upstream of buck converters.

Use Value: 53.9 V clamping ensures no overvoltage reaches USB controller ICs rated for 36 V absolute maximum.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMBJ36A	DO-214AA package (SMB), 36 V V_WM, 58.1 V V_C @ 6.9 A, same 400 W rating	Surface-mount footprint; higher clamping voltage reduces margin for 36 V systems	Select when board space constraints require SMD layout and thermal management supports SMB package
1.5KE39A	Same DO-41 package, identical V_WM/V_BR/V_C, but 1500 W peak power (10/1000 μs), higher I_PPM (38.9 A)	Over-spec'd for most 400 W use cases; larger junction increases capacitance and cost	Choose only when legacy designs mandate 1.5 kW rating or require higher single-pulse robustness

Compared with SMBJ36A and 1.5KE39A, P4KE39A-E3/54 offers optimal balance of through-hole manufacturability, precise 33.3 V standoff for 36 V systems, and verified AEC-Q101 qualification-making it preferred for new automotive and industrial designs where DO-41 reliability and qualification are mandatory.

Availability

P4KE39A-E3/54 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, telecom power feeds, and consumer USB-C protection requiring stable component supply and full traceability.

Supply support for P4KE39A-E3/54 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive qualification.

The P4KE series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for robust, standardized transient suppression in harsh environments including automotive, industrial, and telecom infrastructure.

FAQ

What is the polarity configuration of P4KE39A-E3/54?

P4KE39A-E3/54 is a unidirectional TVS diode. Its cathode is marked by a color band on the DO-41 package body, and it conducts only in reverse bias during overvoltage events. This configuration provides asymmetric clamping ideal for DC power rails where forward conduction must be blocked.

Does P4KE39A-E3/54 meet automotive qualification standards?

Yes, P4KE39A-E3/54 carries the E3 suffix, indicating RoHS-compliance and AEC-Q101 qualification per Vishay documentation. This validates its suitability for automotive applications including engine control units, body electronics, and ADAS sensors where reliability under thermal and mechanical stress is mandatory.

What is the maximum clamping voltage of P4KE39A-E3/54 under surge conditions?

The maximum clamping voltage (V_C) of P4KE39A-E3/54 is 53.9 V at 7.4 A peak pulse current (I_PPM) with a 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuits during standardized surge events and is confirmed in the Vishay datasheet Table on page 2.

Can P4KE39A-E3/54 be used in bidirectional signal line protection?

No, P4KE39A-E3/54 is unidirectional only. For bidirectional AC or data line protection, Vishay specifies CA-suffix variants (e.g., P4KE39CA). Using P4KE39A-E3/54 on bidirectional lines risks forward conduction and failure; always match polarity type to system signal architecture.

What is the thermal resistance specification for P4KE39A-E3/54?

P4KE39A-E3/54 has a typical junction-to-lead thermal resistance (R_θJL) of 66 °C/W and junction-to-ambient resistance (R_θJA) of 100 °C/W (with 10 mm lead length). These values inform heatsinking requirements and derating curves for sustained power dissipation beyond transient events.

P4KE39A-E3/54 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

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

Series:: TransZorb®

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: Zener

Unidirectional Channels:: 1

Bidirectional Channels:: -

Voltage - Reverse Standoff (Typ):: 33.3V

Voltage - Breakdown (Min):: 37.1V

Voltage - Clamping (Max) @ Ipp:: 53.9V

Current - Peak Pulse (10/1000µs):: 7.4A

Power - Peak Pulse:: 400W

Power Line Protection:: No

Applications:: General Purpose

Capacitance @ Frequency:: -

Operating Temperature:: -55°C ~ 175°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-204AL (DO-41)

P4KE39A-E3/54 FAQ

1.How can I place an order for P4KE39A-E3/54 through Aetrix?

Please submit a Request for Quotation (RFQ) for P4KE39A-E3/54 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 P4KE39A-E3/54 reliable?

The price and inventory of P4KE39A-E3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE39A-E3/54 is usually 5 days.

3.What payment methods are accepted for P4KE39A-E3/54?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE39A-E3/54 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for P4KE39A-E3/54?

P4KE39A-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your P4KE39A-E3/54 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 P4KE39A-E3/54?

For technical support, including P4KE39A-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE39A-E3/54 requirements.

6.How does Aetrix verify that P4KE39A-E3/54 is sourced from the original manufacturer or authorized distributors?

All P4KE39A-E3/54 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 P4KE39A-E3/54 meets industry standards.

7.What is the process for return or replacement of P4KE39A-E3/54?

All P4KE39A-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with P4KE39A-E3/54, 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 P4KE39A-E3/54 part is unused and in its original packaging.

Return procedure for P4KE39A-E3/54:

1.Submit a request within 90 days.

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

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