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

Vishay General Semiconductor - Diodes Division 5KP18-E3/73

Name: 5KP18-E3/73
Brand: Vishay General Semiconductor - Diodes Division
SKU: 5KP18-E3/73
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 5KP18-E3/73

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

Package:: P600, Axial

Datasheet:: 5KP18-E3/73.pdf

Description:: TVS DIODE 18VWM 32.2VC P600

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Product details

Overview

5KP18-E3/73 from Vishay General Semiconductor is a unidirectional TransZORB® transient voltage suppressor (TVS) diode in P600 package, designed for high-energy surge protection on DC power rails and signal lines. It features 5000 W peak pulse power (10/1000 µs), 18 V stand-off voltage (V_WM), clamping voltage of 29.2 V at 171 A peak pulse current, and AEC-Q101 qualification for automotive-grade reliability.

For engineers reviewing the 5KP18-E3/73 datasheet, 5KP18-E3/73 pinout, 5KP18-E3/73 application, or 5KP18-E3/73 equivalent, this device is selected for robust overvoltage protection in switching power supply outputs, MOSFET gate drivers, and automotive sensor interfaces where fast response (<1 ns), low clamping ratio, and high I_PPM capability are critical.

Technical Context

The 5KP18-E3/73 uses a glass-passivated P600 chip junction optimized for repetitive 10/1000 µs surge waveforms with 0.01% duty cycle. Its unidirectional polarity enables integration into DC-biased circuits without reverse conduction concerns, and its 175 °C maximum junction temperature supports operation in under-hood automotive environments.

Clamping performance is defined by a low incremental surge resistance and tight V_BR tolerance (20.0–22.1 V at 50 mA), ensuring predictable turn-on behavior during transients. The device meets JESD 22-B106 solderability standards and JESD 201 Class 1A whisker resistance, confirming suitability for automated assembly in industrial and automotive production.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	18 V - Maximum continuous reverse operating voltage before clamping begins; sets safe DC bias margin for 12 V or 15 V rail protection.
V_BR (min/max)	20.0 V / 22.1 V at 50 mA - Confirmed breakdown threshold ensures reliable activation above normal operating voltage with minimal overshoot.
V_C @ I_PPM	29.2 V at 171 A - Clamping voltage limits downstream component stress during 5 kW surges; clamping ratio = 1.62×V_WM.
P_PPM	5000 W - Peak pulse power rating per 10/1000 µs waveform; enables protection against lightning-induced surges and inductive switch-off spikes.
I_FSM	600 A - Non-repetitive forward surge current (8.3 ms half-sine); supports crowbar-style fault handling without catastrophic failure.
T_J max.	175 °C - Maximum junction temperature allows deployment in high-ambient environments such as engine control units and power converters.
Package	P600 - Axial-leaded, molded epoxy case rated UL 94 V-0; provides mechanical robustness and thermal path for PCB-mounted heat dissipation.

Pinout & Package

P600 package: axial-leaded, cylindrical epoxy body with cathode band marking; leads are matte tin-plated, solderable per J-STD-002 and JESD 22-B102; 9.5 mm body length, 9.1 mm diameter, 1.32 mm lead diameter.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal	Connected to lower-potential side (e.g., ground or return path); conducts during positive transients when cathode is biased higher.
Cathode	Clamping reference terminal	Marked with color band; connected to protected line (e.g., +12 V rail); initiates avalanche breakdown when voltage exceeds V_BR.

Key Features

Feature	Design Value
5000 W peak pulse power (10/1000 µs)	Enables single-device protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 12 V systems without parallel staging.
AEC-Q101 qualified	Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces per stress test requirements.
Low clamping ratio (1.62×V_WM)	Minimizes voltage overshoot during clamping, protecting 30 V-rated MOSFETs and logic ICs downstream of the TVS.
Fast response time (<1 ns)	Activates before sensitive components experience damaging overvoltage, critical for protecting high-speed gate drivers and microcontrollers.
P600 glass-passivated junction	Provides stable V_BR and low leakage (<2 µA at V_WM) across temperature, ensuring long-term reliability in harsh environments.

Applications

Automotive Power Rail Protection	Industrial Switching Power Supply Output
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp surges up to 120 V within nanoseconds. Use Value: Withstands 600 A surge current and maintains clamping below 30 V, preserving CAN transceivers and MCU power domains.	Use Scenario: Safeguarding output stage of 24 V industrial SMPS against inductive kickback from relay coils and motor drivers. IC Role / Device Role / Timing Role: Standoff-rated TVS connected across output capacitor to absorb energy during overvoltage events without crowbar action. Use Value: 5000 W rating handles repetitive 10/1000 µs pulses, enabling resettable protection instead of fuse-only schemes.
MOSFET Gate Driver Protection	Telecom Line Interface Protection
Use Scenario: Shielding high-side N-channel MOSFET gates from Miller-induced voltage spikes during fast switching in half-bridge inverters. IC Role / Device Role / Timing Role: Low-capacitance TVS tied between gate and source to clamp transient excursions while preserving drive timing integrity. Use Value: Sub-1 ns response prevents gate oxide breakdown; 29.2 V clamping protects 30 V-rated gate drivers without false triggering.	Use Scenario: Guarding RS-485 transceiver inputs in outdoor base stations exposed to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary-level TVS on differential bus lines to limit common-mode transients before secondary protection stages. Use Value: 175 °C rating ensures operation in sealed enclosures; UL 94 V-0 molding prevents flame propagation during fault conditions.

Automotive Power Rail Protection

Industrial Switching Power Supply Output

Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients per ISO 7637-2 Pulse 5a.

IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp surges up to 120 V within nanoseconds.

Use Value: Withstands 600 A surge current and maintains clamping below 30 V, preserving CAN transceivers and MCU power domains.

Use Scenario: Safeguarding output stage of 24 V industrial SMPS against inductive kickback from relay coils and motor drivers.

IC Role / Device Role / Timing Role: Standoff-rated TVS connected across output capacitor to absorb energy during overvoltage events without crowbar action.

Use Value: 5000 W rating handles repetitive 10/1000 µs pulses, enabling resettable protection instead of fuse-only schemes.

MOSFET Gate Driver Protection

Telecom Line Interface Protection

Use Scenario: Shielding high-side N-channel MOSFET gates from Miller-induced voltage spikes during fast switching in half-bridge inverters.

IC Role / Device Role / Timing Role: Low-capacitance TVS tied between gate and source to clamp transient excursions while preserving drive timing integrity.

Use Value: Sub-1 ns response prevents gate oxide breakdown; 29.2 V clamping protects 30 V-rated gate drivers without false triggering.

Use Scenario: Guarding RS-485 transceiver inputs in outdoor base stations exposed to lightning-induced surges on long cable runs.

IC Role / Device Role / Timing Role: Primary-level TVS on differential bus lines to limit common-mode transients before secondary protection stages.

Use Value: 175 °C rating ensures operation in sealed enclosures; UL 94 V-0 molding prevents flame propagation during fault conditions.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Littelfuse SMAJ18A	Lower peak power (400 W), SMA package, 18 V V_WM, 29.2 V V_C at 13.7 A	Suitable for low-energy signal-line protection only; not rated for automotive load dump or power rail duty cycles.	Select when board space is constrained and surge energy is limited to IEC 61000-4-2 ESD or low-current transients.
ON Semiconductor 1.5KE18A	Same P600 package, 18 V V_WM, but 1500 W peak power (10/1000 µs), 27.7 V V_C at 54.2 A	Insufficient for ISO 7637-2 Pulse 5a; requires parallel devices to match 5KP18-E3/73 energy handling.	Choose only if legacy design reuse mandates identical footprint and lower cost is prioritized over single-device robustness.

Compared with SMAJ18A and 1.5KE18A, the 5KP18-E3/73 delivers 3.3× higher peak power than SMAJ18A and over 3× higher than 1.5KE18A-enabling standalone protection for high-energy automotive and industrial transients without layout redesign or paralleling.

Availability

5KP18-E3/73 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial switching power supply output safeguarding, and MOSFET gate driver surge suppression requiring stable component supply across extended production lifecycles.

Supply support for 5KP18-E3/73 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 diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, power handling, and automotive qualification.

The 5KP series was engineered specifically for high-energy transient suppression in automotive and industrial power systems, targeting replacement of crowbar circuits and enabling resettable overvoltage protection in DC distribution networks.

FAQ

What is the clamping voltage of the 5KP18-E3/73 under maximum surge conditions?

The 5KP18-E3/73 clamps to 29.2 V at its rated peak pulse current of 171 A (10/1000 µs waveform). This value is measured and guaranteed per JEDEC registered test conditions and reflects the maximum voltage seen by downstream circuitry during a full 5000 W transient event. The 5KP18-E3/73 maintains this clamping performance across its specified junction temperature range.

Is the 5KP18-E3/73 suitable for automotive applications?

Yes-the 5KP18-E3/73 carries AEC-Q101 qualification and is explicitly rated for automotive use in environments up to 175 °C junction temperature. It meets requirements for load dump protection (ISO 7637-2 Pulse 5a), inductive switching transients, and under-hood ECU power rail hardening. The 5KP18-E3/73 also complies with RoHS and JESD 201 Class 1A whisker resistance standards.

How does the 5KP18-E3/73 differ from standard 1.5 kW TVS diodes like 1.5KE18A?

The 5KP18-E3/73 delivers 5000 W peak pulse power-more than three times the 1500 W rating of 1.5KE18A-while sharing the same P600 package outline. Its higher I_PPM (171 A vs. 54.2 A) and superior thermal robustness enable single-device protection against severe transients where 1.5KE18A would require parallel staging. The 5KP18-E3/73 also features tighter V_BR tolerance and AEC-Q101 qualification not present in the 1.5KE series.

What is the meaning of the "E3/73" suffix in 5KP18-E3/73?

The "E3" suffix denotes RoHS-compliant, commercial-grade construction with JESD 201 Class 1A whisker resistance; "73" indicates the preferred packaging code for 750-piece bulk packaging in ammo pack format. This differs from tape-and-reel variants (e.g., /54), and confirms the 5KP18-E3/73 is intended for manual or semi-automated assembly rather than high-speed pick-and-place.

Can the 5KP18-E3/73 be used in bidirectional configurations?

No-the 5KP18-E3/73 is unidirectional only, as confirmed in the Vishay datasheet. It conducts in reverse avalanche mode above V_BR but blocks forward current beyond its 3.5 V forward voltage at 100 A. For bidirectional protection, two 5KP18-E3/73 devices must be connected in series opposition, or a dedicated bidirectional part (e.g., 5KP18CA) should be selected. Using a single 5KP18-E3/73 in AC-coupled or bipolar signal paths will result in unintended conduction.

5KP18-E3/73 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Package/Case:: P600, Axial

Series:: TransZorb®

Packaging:: Tape & Box (TB)

Product Status:: Obsolete

Type:: Zener

Unidirectional Channels:: 1

Bidirectional Channels:: -

Voltage - Reverse Standoff (Typ):: 18V

Voltage - Breakdown (Min):: 20V

Voltage - Clamping (Max) @ Ipp:: 32.2V

Current - Peak Pulse (10/1000µs):: 155A

Power - Peak Pulse:: 5000W (5kW)

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:: P600

5KP18-E3/73 FAQ

1.How can I place an order for 5KP18-E3/73 through Aetrix?

Please submit a Request for Quotation (RFQ) for 5KP18-E3/73 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 5KP18-E3/73 reliable?

The price and inventory of 5KP18-E3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5KP18-E3/73 is usually 5 days.

3.What payment methods are accepted for 5KP18-E3/73?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5KP18-E3/73 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 5KP18-E3/73?

5KP18-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 5KP18-E3/73 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 5KP18-E3/73?

For technical support, including 5KP18-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5KP18-E3/73 requirements.

6.How does Aetrix verify that 5KP18-E3/73 is sourced from the original manufacturer or authorized distributors?

All 5KP18-E3/73 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 5KP18-E3/73 meets industry standards.

7.What is the process for return or replacement of 5KP18-E3/73?

All 5KP18-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 5KP18-E3/73, 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 5KP18-E3/73 part is unused and in its original packaging.

Return procedure for 5KP18-E3/73:

1.Submit a request within 90 days.

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

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