My Inquiry
My Account
Vishay General Semiconductor - Diodes Division LCE20-E3/54
- Part No.:
- LCE20-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
LCE20-E3/54.pdf
- Description:
- TVS DIODE 20VWM 35.8VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:7,398
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LCE20-E3/54 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in DC power rails and signal lines. It features a 20 V standoff voltage (VWM), 22.2–24.5 V breakdown voltage (VBR), 1500 W peak pulse power (10/1000 µs), 32.4 V clamping voltage at 46 A peak current, and operates up to 175 °C junction temperature.
For engineers reviewing the LCE20-E3/54 datasheet, LCE20-E3/54 pinout, LCE20-E3/54 application, or LCE20-E3/54 equivalent, key selection criteria include clamping performance under 10/1000 µs surges, low incremental surge resistance, UL 497B listing for telecom protection, RoHS-compliant matte tin-plated leads, and compatibility with J-STD-002 solderability standards.
Technical Context
The LCE20-E3/54 employs a glass-passivated silicon junction optimized for fast response (<1 ps) to ESD and lightning-induced transients. Its unidirectional polarity-marked by a cathode band-enables integration into DC-biased circuits without reverse conduction during normal operation.
It delivers 1500 W peak pulse power per IEC 61000-4-5 (10/1000 µs) with 32.4 V clamping at 46 A, ensuring reliable protection of downstream ICs, MOSFETs, and sensor interfaces. The device is rated for -65 °C to +175 °C operating junction temperature and meets UL 497B for telecom surge immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - Maximum continuous reverse working voltage before clamping begins |
| VBR (min/max) | 22.2 V / 24.5 V - Breakdown occurs within this range at 1 mA test current |
| VC @ IPPM | 32.4 V - Clamped voltage seen by protected circuit during 46 A 10/1000 µs surge |
| PPPM | 1500 W - Peak surge power handling capability per standard waveform |
| IPPM | 46 A - Maximum non-repetitive peak pulse current it can safely divert |
| Junction Temp | -65 °C to +175 °C - Enables use in automotive under-hood and industrial high-temp environments |
| Polarity | Unidirectional - Cathode-band marked; blocks reverse current until breakdown threshold |
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 | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional TVS configuration |
| Cathode (banded end) | Reverse-blocking terminal | Connected to protected line; conducts only when reverse voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling |
| 1500 W peak pulse power (10/1000 µs) | Withstands high-energy surges common in industrial motor drives and telecom line interfaces |
| UL 497B listed | Validated for telecom surge protection applications including central office and DSLAM equipment |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker resistance and global environmental compliance requirements |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes let-through voltage to protect sensitive 3.3 V/5 V logic and analog front-ends |
Applications
| Industrial Motor Drives | Telecom Line Interfaces |
|---|---|
Use Scenario: Protection of gate drivers and feedback sensors against switching transients in variable-frequency drives. IC Role / Device Role / Timing Role: Unidirectional TVS placed across DC bus or IGBT collector-emitter to clamp inductive kickback. Use Value: Limits voltage overshoot to ≤32.4 V during 46 A surges, preventing gate oxide rupture in 600 V IGBTs. | Use Scenario: Surge suppression on POTS or xDSL line cards exposed to lightning-induced common-mode transients. IC Role / Device Role / Timing Role: Primary protection element in UL 497B-compliant telecom interface circuits. Use Value: Meets IEC 61000-4-5 Level 4 (4 kV) requirements while maintaining <100 μA leakage at 20 V. |
| Automotive Body Control Modules | Consumer Sensor Signal Lines |
Use Scenario: Protecting LIN bus transceivers and microcontroller I/O pins from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Secondary-level TVS on 12 V supply rail and LIN data line. Use Value: Operates reliably up to +175 °C junction temperature, supporting under-hood placement near engine control units. | Use Scenario: Shielding MEMS accelerometers and Hall-effect sensors in smart home devices from ESD events. IC Role / Device Role / Timing Role: Low-capacitance (≤100 pF) unidirectional clamp on analog output or I²C lines. Use Value: Adds <100 pF junction capacitance-negligible impact on 100 kHz sensor bandwidth and I²C rise time. |
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 20 V VWM, but 600 W PPPM (vs. 1500 W); DO-214AA package vs. 1.5KE | Lower surge rating suits consumer-grade USB or display interfaces, not industrial 4 kV surges | Select SMBJ20A only if system-level testing confirms 600 W suffices and PCB space favors SMC footprint |
| 1.5KE20A | Identical electrical specs and 1.5KE package; differs only in branding (Vishay vs. generic) and traceability | No functional difference; used interchangeably where full Vishay traceability is not required | Choose 1.5KE20A for cost-sensitive BOMs where Vishay-specific qualification is unnecessary |
Compared with SMBJ20A and 1.5KE20A, the LCE20-E3/54 provides guaranteed 1500 W surge capability in a UL-listed, RoHS-compliant 1.5KE package with verified 175 °C operation-making it preferred for mission-critical telecom and industrial deployments requiring full compliance documentation.
Availability
LCE20-E3/54 is available at Aetrix Electronics and suitable for industrial motor drives, telecom line interfaces, and automotive body control modules requiring stable component supply, full traceability, and compliance with UL 497B and RoHS.
Supply support for LCE20-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, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and application-specific validation.
The LCE20-E3/54 belongs to Vishay's TRANSZORB® low-capacitance TVS family, engineered specifically for high-energy transient suppression in telecom infrastructure, industrial automation, and automotive electronics where clamping precision and thermal robustness are critical.
FAQ
What is the clamping voltage of the LCE20-E3/54 at its rated peak pulse current?
The LCE20-E3/54 has a maximum clamping voltage (VC) of 32.4 V at 46 A peak pulse current (IPPM) under a 10/1000 µs waveform. This value ensures protected circuits experience minimal overvoltage during surge events. The LCE20-E3/54 achieves this with low incremental surge resistance, directly contributing to its ability to maintain tight clamping performance across temperature and lifetime.
Is the LCE20-E3/54 RoHS-compliant and qualified for high-reliability applications?
Yes, the LCE20-E3/54 carries the E3 suffix, indicating full RoHS compliance per Directive 2011/65/EU and passing JESD 201 Class 1A whisker testing. Its glass-passivated junction, UL 497B listing, and 175 °C maximum junction temperature make it suitable for high-reliability telecom and industrial applications. The LCE20-E3/54 is manufactured and tested to meet these specifications consistently across production lots.
How does the LCE20-E3/54 differ from bidirectional TVS diodes like the LCE20CA?
The LCE20-E3/54 is unidirectional and functions only during reverse-biased overvoltage conditions, making it ideal for DC power rails and single-polarity signal lines. In contrast, the LCE20CA is bidirectional and protects AC signals or differential buses. The LCE20-E3/54 offers tighter VBR tolerance and lower leakage at VWM than its bidirectional counterpart, which is reflected in its 1.0 µA max leakage versus 5.0 µA for LCE20CA at same VWM.
What is the maximum operating temperature and thermal derating behavior of the LCE20-E3/54?
The LCE20-E3/54 supports an operating junction temperature range of -65 °C to +175 °C. Its power dissipation (PD) is derated linearly above 25 °C ambient, reaching 0 W at 175 °C. Derating follows the curve in Figure 2 of document 88357, with 6.5 W specified at TL = 75 °C on an infinite heatsink. This thermal profile enables the LCE20-E3/54 to remain effective in high-ambient environments such as engine compartments or enclosed industrial enclosures.
Can the LCE20-E3/54 be used for AC line protection, and if so, how?
The LCE20-E3/54 is unidirectional and not suitable for direct AC line protection alone. However, per Vishay Application Note in document 88357, two LCE20-E3/54 units can be connected in series opposition (anode-to-anode or cathode-to-cathode) to form a bidirectional clamp for AC signal lines. This configuration maintains the 1500 W surge rating per device and is validated for telecom AC line protection per UL 497B. Always verify layout parasitics and total clamping voltage in final design.
LCE20-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:
- 35.8V
- Current - Peak Pulse (10/1000µs):
- 42A
- 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
LCE20-E3/54 FAQ
1.How can I place an order for LCE20-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for LCE20-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 LCE20-E3/54 reliable?
The price and inventory of LCE20-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 LCE20-E3/54 is usually 5 days.
3.What payment methods are accepted for LCE20-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LCE20-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LCE20-E3/54?
LCE20-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LCE20-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 LCE20-E3/54?
For technical support, including LCE20-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LCE20-E3/54 requirements.
6.How does Aetrix verify that LCE20-E3/54 is sourced from the original manufacturer or authorized distributors?
All LCE20-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 LCE20-E3/54 meets industry standards.
7.What is the process for return or replacement of LCE20-E3/54?
All LCE20-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with LCE20-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 LCE20-E3/54 part is unused and in its original packaging.
Return procedure for LCE20-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LCE20-E3/54 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
