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

Vishay General Semiconductor - Diodes Division LCE15-E3/73

Name: LCE15-E3/73
Brand: Vishay General Semiconductor - Diodes Division
SKU: LCE15-E3/73
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LCE15-E3/73

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

Package:: DO-201AA, DO-27, Axial

Datasheet:: LCE15-E3/73.pdf

Description:: TVS DIODE 15VWM 26.9VC 1.5KE

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Product details

Overview

LCE15-E3/73 from Vishay General Semiconductor is a unidirectional low-capacitance TRANSZORB® transient voltage suppressor (TVS) diode designed for robust overvoltage protection of sensitive signal lines. It features a 15 V standoff voltage (V_WM), 16.7–18.5 V breakdown range (V_BR), 1500 W peak pulse power (10/1000 µs), 24.4 V clamping voltage at 61 A peak current, and operates from –65 °C to +175 °C junction temperature.

For engineers reviewing the LCE15-E3/73 datasheet, LCE15-E3/73 pinout, LCE15-E3/73 application, or LCE15-E3/73 equivalent, key selection criteria include unidirectional clamping performance, UL 497B telecom listing, RoHS-compliant matte tin leads, 1.5KE package compatibility, and verified surge current handling in industrial sensor interface and AC line protection circuits.

Technical Context

This TVS diode employs a glass-passivated chip junction for stable avalanche behavior under repetitive transients. Its low incremental surge resistance and fast response time enable effective suppression of ESD, lightning-induced surges, and inductive switching spikes on signal paths with minimal voltage overshoot.

The device is rated for 1500 W peak pulse power per 10/1000 µs waveform at 0.01 % duty cycle and derates linearly above 25 °C ambient, maintaining reliable clamping up to 175 °C junction temperature. It meets JESD 22-B106 solder dip requirements (275 °C, 10 s) and JESD 201 Class 1A whisker testing.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	15 V - Maximum continuous reverse operating voltage before conduction begins; defines safe signal swing margin for protected line.
V_BR (min/max)	16.7 V / 18.5 V - Breakdown voltage range at 1 mA test current; ensures predictable turn-on threshold across production lot.
V_C @ I_PP	24.4 V at 61 A - Clamping voltage during 10/1000 µs surge; limits downstream IC stress to safe levels.
P_PPM	1500 W - Peak pulse power handling capability; supports high-energy transients without failure.
Junction Capacitance	100 pF at 0 V - Low capacitance preserves signal integrity on high-speed data lines (e.g., RS-485, CAN).
Polarity	Unidirectional - Protects against positive-going transients only; requires external polarity alignment in circuit.
T_J max.	+175 °C - High-temperature operation enables use in under-hood automotive or industrial power supply environments.

Pinout & Package

Package: 1.5KE molded epoxy case (Case Style 1.5KE), RoHS-compliant, UL 94 V-0 rated, with matte tin-plated leads. Polarity indicated by cathode band.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Transient current sink path	Connected to protected line; conducts surge current to ground when V_WM exceeded.
Cathode	Reference node / ground return	Connected to system ground; color band identifies this terminal; defines unidirectional conduction direction.

Key Features

Feature	Design Value
Glass passivated junction	Ensures stable, repeatable avalanche characteristics and long-term reliability under repetitive surge stress.
1500 W peak pulse power (10/1000 µs)	Withstands high-energy transients common in telecom line interfaces and industrial motor drive feedback paths.
UL 497B listed for telecom protection	Validated for use in primary-side surge protection of telephone line interface circuits per industry safety standard.
Low 100 pF junction capacitance	Minimizes signal distortion and timing skew on data lines up to ~10 MHz bandwidth applications.
JESD 201 Class 1A whisker tested	Eliminates risk of tin whisker growth in high-reliability, long-life deployments (e.g., base station equipment).

Applications

Industrial Sensor Interface	Telecom Line Protection
Use Scenario: Protecting analog output lines of pressure/temperature sensors in factory automation PLC modules from inductive kickback and ESD. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between sensor output and ADC input, referenced to system ground. Use Value: Limits transient voltage to ≤24.4 V, preventing ADC latch-up or op-amp damage while preserving DC accuracy via 15 V V_WM.	Use Scenario: Primary-side surge suppression on POTS (Plain Old Telephone Service) line interface cards in central office equipment. IC Role / Device Role / Timing Role: Standoff device installed across tip/ring pair, coordinated with gas discharge tube (GDT) for multi-stage protection. Use Value: UL 497B listing confirms compliance; 1500 W rating handles lightning-induced surges per ITU-T K.20/21.
AC Signal Line Protection	Power Supply Input Stage
Use Scenario: Bidirectional protection of RS-485 differential pairs using two LCE15-E3/73 devices in anti-parallel configuration. IC Role / Device Role / Timing Role: Paired unidirectional TVS units providing symmetrical clamping for ± transients on A/B bus lines. Use Value: 100 pF capacitance avoids signal integrity degradation at 10 Mbps; 24.4 V clamping protects transceivers rated to 30 V abs max.	Use Scenario: Secondary-side transient suppression on 12 V DC input rails of embedded controllers exposed to load dump or hot-swap events. IC Role / Device Role / Timing Role: Parallel-connected TVS across input capacitor to clamp voltage excursions during fast-rising surges. Use Value: 175 °C max junction temperature supports operation near heat-generating DC/DC converters; 6.5 W steady-state dissipation allows thermal design margin.

Industrial Sensor Interface

Telecom Line Protection

Use Scenario: Protecting analog output lines of pressure/temperature sensors in factory automation PLC modules from inductive kickback and ESD.

IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between sensor output and ADC input, referenced to system ground.

Use Value: Limits transient voltage to ≤24.4 V, preventing ADC latch-up or op-amp damage while preserving DC accuracy via 15 V V_WM.

Use Scenario: Primary-side surge suppression on POTS (Plain Old Telephone Service) line interface cards in central office equipment.

IC Role / Device Role / Timing Role: Standoff device installed across tip/ring pair, coordinated with gas discharge tube (GDT) for multi-stage protection.

Use Value: UL 497B listing confirms compliance; 1500 W rating handles lightning-induced surges per ITU-T K.20/21.

AC Signal Line Protection

Power Supply Input Stage

Use Scenario: Bidirectional protection of RS-485 differential pairs using two LCE15-E3/73 devices in anti-parallel configuration.

IC Role / Device Role / Timing Role: Paired unidirectional TVS units providing symmetrical clamping for ± transients on A/B bus lines.

Use Value: 100 pF capacitance avoids signal integrity degradation at 10 Mbps; 24.4 V clamping protects transceivers rated to 30 V abs max.

Use Scenario: Secondary-side transient suppression on 12 V DC input rails of embedded controllers exposed to load dump or hot-swap events.

IC Role / Device Role / Timing Role: Parallel-connected TVS across input capacitor to clamp voltage excursions during fast-rising surges.

Use Value: 175 °C max junction temperature supports operation near heat-generating DC/DC converters; 6.5 W steady-state dissipation allows thermal design margin.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMBJ15A	Same V_WM (15 V), lower P_PPM (600 W), SMB package (smaller footprint, lower thermal mass)	Better suited for space-constrained PCBs with lower surge energy requirements (e.g., USB port protection)	Select SMBJ15A if board area is critical and surge threat level is ≤600 W; verify thermal derating in enclosed enclosures.
1.5KE15A	Identical electrical specs and 1.5KE package; differs only in packaging suffix (E3/73 vs. standard bulk/reel code)	No functional difference; same UL listing, RoHS status, and mechanical dimensions	1.5KE15A is a direct form-fit-function replacement; LCE15-E3/73 adds E3 whisker-tested lead finish and 73 tape-and-reel packaging.

Compared with SMBJ15A and 1.5KE15A, the LCE15-E3/73 provides identical clamping and standoff performance but adds JESD 201 Class 1A whisker resistance and UL 497B telecom qualification-critical for long-lifecycle telecom infrastructure and industrial control systems where field reliability is non-negotiable.

Availability

LCE15-E3/73 is available at Aetrix Electronics and suitable for industrial sensor interface, telecom line protection, AC signal line protection, and power supply input stage applications requiring stable component supply, long-term lifecycle support, and traceable RoHS-compliant sourcing.

Supply support for LCE15-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, MOSFETs, and protection devices with emphasis on reliability, precision, and application-specific validation.

The LCE series belongs to Vishay's low-capacitance TRANSZORB® TVS family, engineered specifically for high-fidelity signal line protection in telecom, industrial automation, and automotive subsystems where low clamping voltage and minimal parasitic capacitance are essential.

FAQ

What is the clamping voltage of the LCE15-E3/73 under a 10/1000 µs surge?

The LCE15-E3/73 has a maximum clamping voltage (V_C) of 24.4 V at 61 A peak pulse current (I_PP) under the standardized 10/1000 µs waveform. This value is measured per Figure 3 in the official Vishay datasheet (Doc. #88357) and defines the upper voltage limit imposed on protected circuitry during surge events. The LCE15-E3/73 maintains this clamping performance across its full operating temperature range.

Is the LCE15-E3/73 suitable for bidirectional transient protection?

No, the LCE15-E3/73 is a unidirectional TVS diode and protects only against positive-going transients relative to ground. For bidirectional protection (e.g., on AC or differential lines), two LCE15-E3/73 devices must be connected in anti-parallel configuration. This approach is explicitly recommended in Vishay's Application Note for AC line protection (Fig. 4), and the LCE15-E3/73's 100 pF capacitance ensures minimal signal distortion in such implementations.

Does the LCE15-E3/73 meet UL 497B certification?

Yes, the LCE15-E3/73 is UL listed for Telecom application protection per UL 497B (File E136766), as confirmed in the Vishay datasheet revision 24-Sep-12 (Document Number: 88357). This certification validates its suitability for primary-side surge protection in telephone line interface circuits and satisfies safety requirements for deployment in carrier-grade telecom infrastructure equipment.

What is the meaning of the "E3/73" suffix in LCE15-E3/73?

The "E3" suffix indicates RoHS-compliant, matte tin-plated leads qualified to JESD 201 Class 1A for whisker resistance, while "73" denotes the specific tape-and-reel packaging format: 73 mm reel width, 13-inch diameter, with 1400 units per reel. This packaging code aligns with Vishay's ordering information table and ensures compatibility with automated SMT placement systems used in high-volume manufacturing of the LCE15-E3/73.

Can the LCE15-E3/73 replace the 1.5KE15A in an existing design?

Yes, the LCE15-E3/73 is a direct form-fit-function replacement for the 1.5KE15A, sharing identical electrical specifications, 1.5KE package dimensions, and UL 497B listing. The LCE15-E3/73 adds E3 whisker-tested leads and 73-tape packaging-but no PCB layout changes are required. Engineers may substitute LCE15-E3/73 into legacy 1.5KE15A designs to enhance long-term field reliability without redesign.

LCE15-E3/73 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Package/Case:: DO-201AA, DO-27, Axial

Series:: TransZorb®

Packaging:: Tape & Box (TB)

Product Status:: Obsolete

Type:: Zener

Unidirectional Channels:: 1

Bidirectional Channels:: -

Voltage - Reverse Standoff (Typ):: 15V

Voltage - Breakdown (Min):: 16.7V

Voltage - Clamping (Max) @ Ipp:: 26.9V

Current - Peak Pulse (10/1000µs):: 56A

Power - Peak Pulse:: 1500W (1.5kW)

Power Line Protection:: No

Applications:: General Purpose

Capacitance @ Frequency:: -

Operating Temperature:: -65°C ~ 175°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 1.5KE

LCE15-E3/73 FAQ

1.How can I place an order for LCE15-E3/73 through Aetrix?

Please submit a Request for Quotation (RFQ) for LCE15-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 LCE15-E3/73 reliable?

The price and inventory of LCE15-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 LCE15-E3/73 is usually 5 days.

3.What payment methods are accepted for LCE15-E3/73?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LCE15-E3/73 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LCE15-E3/73?

LCE15-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LCE15-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 LCE15-E3/73?

For technical support, including LCE15-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LCE15-E3/73 requirements.

6.How does Aetrix verify that LCE15-E3/73 is sourced from the original manufacturer or authorized distributors?

All LCE15-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 LCE15-E3/73 meets industry standards.

7.What is the process for return or replacement of LCE15-E3/73?

All LCE15-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with LCE15-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 LCE15-E3/73 part is unused and in its original packaging.

Return procedure for LCE15-E3/73:

1.Submit a request within 90 days.

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

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