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

Vishay General Semiconductor - Diodes Division LCE20A-E3/54

Name: LCE20A-E3/54
Brand: Vishay General Semiconductor - Diodes Division
SKU: LCE20A-E3/54
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LCE20A-E3/54

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

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

Datasheet:: LCE20A-E3/54.pdf

Description:: TVS DIODE 20VWM 32.4VC 1.5KE

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Inventory:7,429

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Product details

Overview

LCE20A-E3/54 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection of sensitive electronics. It features a 20 V standoff voltage (V_WM), 22.2–24.5 V breakdown voltage (V_BR), 32.4 V clamping voltage at 46 A peak pulse current, 1500 W peak pulse power (10/1000 µs), and operates up to 175 °C junction temperature. It is used in DC power line and signal line protection for industrial sensors and MOSFET gate drivers.

For engineers reviewing the LCE20A-E3/54 datasheet, LCE20A-E3/54 pinout, LCE20A-E3/54 application, or LCE20A-E3/54 equivalent, key selection criteria include unidirectional clamping behavior, low incremental surge resistance, UL 497B listing for telecom applications, RoHS-compliant matte tin plating, and compatibility with J-STD-002 solderability standards.

Technical Context

The LCE20A-E3/54 employs a glass-passivated chip junction for stable avalanche performance under repetitive transients. Its 10/1000 µs waveform response delivers 1500 W peak pulse power with 0.01% duty cycle, enabling protection against inductive switching spikes and lightning-induced surges without thermal runaway.

Designed for DC-coupled protection, it exhibits 5 µA maximum reverse leakage at V_WM, 100 pF junction capacitance at 0 V, and a color-band cathode polarity indicator. The device is rated for -65 °C to +175 °C operating and storage temperature range, supporting harsh-environment deployment.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	20 V - Maximum continuous reverse working voltage before clamping begins
V_BR (min/max)	22.2 V / 24.5 V - Breakdown voltage range at 1 mA test current; defines reliable avalanche onset
V_C @ I_PP	32.4 V @ 46 A - Clamping voltage during 10/1000 µs surge; limits downstream voltage stress
P_PPM	1500 W - Peak pulse power handling capability under standardized surge waveform
Junction Capacitance	100 pF at 0 V - Low enough for signal integrity preservation on moderate-speed lines
T_J max.	+175 °C - Enables operation in high-temperature industrial enclosures and near power stages

Pinout & Package

Package: Case Style 1.5KE - molded epoxy body with UL 94 V-0 flammability rating, 0.375" (9.5 mm) lead length, matte tin-plated leads compliant with J-STD-002.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry terminal during forward conduction	Connected to protected circuit ground or lower-potential node in unidirectional clamp configuration
Cathode	Current exit terminal during reverse avalanche	Marked by color band; connected to line being protected (e.g., +24 V rail or sensor output)

Key Features

Feature	Design Value
Glass passivated junction	Ensures stable, repeatable avalanche characteristics across temperature and lifetime
1500 W peak pulse power (10/1000 µs)	Withstands high-energy transients common in motor drives and relay coil snubbing
UL 497B listed (E136766)	Validated for telecom interface protection per industry safety standard
E3 suffix compliance	Meets JESD 201 Class 1A whisker resistance for long-term reliability in vibration-prone environments

Applications

Industrial Sensor Protection	DC Power Rail Clamping
Use Scenario: Protecting analog output lines of pressure/temperature sensors in factory automation systems exposed to relay-induced transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between sensor output and system ground to clamp positive-going surges. Use Value: Limits transient voltage to ≤32.4 V, preventing damage to 24 V-rated ADC inputs and maintaining measurement integrity.	Use Scenario: Safeguarding 24 V DC input rails of PLC modules subjected to load dump and inductive kickback. IC Role / Device Role / Timing Role: Standoff-rated TVS connected across rail-to-ground to absorb energy from 1500 W-level surges. Use Value: Maintains rail stability during 46 A peak pulses while dissipating energy without thermal failure up to 175 °C.
MOSFET Gate Driver Protection	Telecom Interface Line Protection
Use Scenario: Shielding high-side N-channel MOSFET gate drive signals from cross-talk and ESD in motor control inverters. IC Role / Device Role / Timing Role: Fast-response TVS placed between gate and source to clamp gate-source overvoltage. Use Value: 100 pF capacitance avoids signal distortion on <1 MHz PWM edges; 32.4 V clamping prevents gate oxide rupture.	Use Scenario: Protecting RS-485 transceiver data lines in building management systems connected to outdoor wiring. IC Role / Device Role / Timing Role: UL 497B-listed TVS installed on differential pair to suppress lightning-induced common-mode surges. Use Value: Certified compliance ensures interoperability with telecom infrastructure grounding schemes and reduces field failure risk.

Industrial Sensor Protection

DC Power Rail Clamping

Use Scenario: Protecting analog output lines of pressure/temperature sensors in factory automation systems exposed to relay-induced transients.

IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between sensor output and system ground to clamp positive-going surges.

Use Value: Limits transient voltage to ≤32.4 V, preventing damage to 24 V-rated ADC inputs and maintaining measurement integrity.

Use Scenario: Safeguarding 24 V DC input rails of PLC modules subjected to load dump and inductive kickback.

IC Role / Device Role / Timing Role: Standoff-rated TVS connected across rail-to-ground to absorb energy from 1500 W-level surges.

Use Value: Maintains rail stability during 46 A peak pulses while dissipating energy without thermal failure up to 175 °C.

MOSFET Gate Driver Protection

Telecom Interface Line Protection

Use Scenario: Shielding high-side N-channel MOSFET gate drive signals from cross-talk and ESD in motor control inverters.

IC Role / Device Role / Timing Role: Fast-response TVS placed between gate and source to clamp gate-source overvoltage.

Use Value: 100 pF capacitance avoids signal distortion on <1 MHz PWM edges; 32.4 V clamping prevents gate oxide rupture.

Use Scenario: Protecting RS-485 transceiver data lines in building management systems connected to outdoor wiring.

IC Role / Device Role / Timing Role: UL 497B-listed TVS installed on differential pair to suppress lightning-induced common-mode surges.

Use Value: Certified compliance ensures interoperability with telecom infrastructure grounding schemes and reduces field failure risk.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMBJ20A	Same V_WM (20 V), lower P_PPM (600 W), smaller SMB package (3.5 mm × 4.6 mm)	Better suited for space-constrained PCBs; limited to lower-energy transients	Select when board area is critical and surge threat level is ≤600 W
1.5KE20A	Identical electrical specs and 1.5KE package; non-E3 variant lacks JESD 201 Class 1A whisker testing	No functional difference in clamping or power handling; reduced long-term reliability in high-vibration environments	Select only if whisker resistance is not required and cost is prioritized

Compared with SMBJ20A and 1.5KE20A, the LCE20A-E3/54 uniquely combines 1500 W surge capacity, UL 497B certification, and JESD 201 Class 1A whisker resistance-making it optimal for industrial and telecom applications demanding both high energy absorption and mechanical reliability.

Availability

LCE20A-E3/54 is available at Aetrix Electronics and suitable for industrial sensor interfaces, DC power rail clamping, and telecom line protection requiring stable component supply and full traceability.

Supply support for LCE20A-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, rectifiers, and protection devices with emphasis on reliability, ruggedness, and application-specific validation.

The LCE series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in industrial, automotive, and telecom infrastructure where sustained surge immunity and safety certification are mandatory.

FAQ

What is the clamping voltage of the LCE20A-E3/54 under a 10/1000 µs surge?

The LCE20A-E3/54 has a maximum clamping voltage (V_C) of 32.4 V at 46 A peak pulse current under the standardized 10/1000 µs waveform. This value is measured per Figure 3 in the Vishay datasheet 88357 and defines the upper voltage limit imposed on protected circuits during surge events. The LCE20A-E3/54 maintains this clamping performance across its specified operating temperature range.

Is the LCE20A-E3/54 suitable for AC signal line protection?

No-the LCE20A-E3/54 is a unidirectional TVS diode and is not rated for bidirectional AC line protection. For AC applications like RS-485 or telephone lines, Vishay recommends using two LCE20A-E3/54 devices in anti-parallel configuration or selecting a dedicated bidirectional part such as the LCE20CA. The LCE20A-E3/54 datasheet explicitly states that AC protection requires dual-unit implementation.

Does the LCE20A-E3/54 meet RoHS and halogen-free requirements?

Yes-the LCE20A-E3/54 carries the E3 suffix, confirming RoHS compliance per Directive 2011/65/EU and adherence to JEDEC JS709A halogen-free standards. The matte tin-plated leads satisfy J-STD-002 solderability requirements, and the molding compound meets UL 94 V-0 flammability rating. These qualifications are documented in Vishay's Material Category Policy (doc. 99912).

What is the maximum operating temperature for the LCE20A-E3/54?

The LCE20A-E3/54 supports an operating junction temperature range of -65 °C to +175 °C, as specified in the "Maximum Ratings" table of datasheet 88357. This extended range enables use in high-temperature industrial environments such as motor control cabinets or outdoor telecom enclosures where ambient temperatures exceed 125 °C. Derating applies above 25 °C ambient per the power derating curve (Fig. 2).

How is polarity identified on the LCE20A-E3/54 package?

Polarity is indicated by a color band on the cathode end of the LCE20A-E3/54's molded epoxy case. This marking aligns with industry-standard diode polarity convention: the banded end connects to the higher-potential side (e.g., protected line), while the unbanded end connects to ground or reference potential. The band position is verified in the "Package Outline Dimensions" diagram (page 3) of the LCE6.5A–LCE28A datasheet.

LCE20A-E3/54 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

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

Series:: TransZorb®

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Type:: Zener

Unidirectional Channels:: 1

Bidirectional Channels:: -

Voltage - Reverse Standoff (Typ):: 20V

Voltage - Breakdown (Min):: 22.2V

Voltage - Clamping (Max) @ Ipp:: 32.4V

Current - Peak Pulse (10/1000µs):: 46A

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

LCE20A-E3/54 FAQ

1.How can I place an order for LCE20A-E3/54 through Aetrix?

Please submit a Request for Quotation (RFQ) for LCE20A-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 LCE20A-E3/54 reliable?

The price and inventory of LCE20A-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 LCE20A-E3/54 is usually 5 days.

3.What payment methods are accepted for LCE20A-E3/54?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LCE20A-E3/54 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LCE20A-E3/54?

LCE20A-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LCE20A-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 LCE20A-E3/54?

For technical support, including LCE20A-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LCE20A-E3/54 requirements.

6.How does Aetrix verify that LCE20A-E3/54 is sourced from the original manufacturer or authorized distributors?

All LCE20A-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 LCE20A-E3/54 meets industry standards.

7.What is the process for return or replacement of LCE20A-E3/54?

All LCE20A-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with LCE20A-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 LCE20A-E3/54 part is unused and in its original packaging.

Return procedure for LCE20A-E3/54:

1.Submit a request within 90 days.

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

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