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Vishay General Semiconductor - Diodes Division LCE20-E3/73
- Part No.:
- LCE20-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
LCE20-E3/73.pdf
- Description:
- TVS DIODE 20VWM 35.8VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:7,270
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Product details
Overview
LCE20-E3/73 from Vishay General Semiconductor is a unidirectional low-capacitance TRANSZORB® transient voltage suppressor (TVS) diode in the 1.5KE package, rated for 1500 W peak pulse power (10/1000 μs), 20 V stand-off voltage (VWM), and 32.4 V maximum clamping voltage (VC) at 46 A peak pulse current. It protects sensitive ICs and MOSFETs against inductive switching transients and lightning surges in industrial and telecom power rails.
For engineers reviewing the LCE20-E3/73 datasheet, LCE20-E3/73 pinout, LCE20-E3/73 application, or LCE20-E3/73 equivalent, key selection criteria include its 22.2–24.5 V breakdown voltage range, 100 pF junction capacitance at 0 V, 6.5 W steady-state power dissipation, UL 497B listing for telecom protection, and RoHS-compliant matte tin-plated leads solderable per J-STD-002.
Technical Context
This TVS diode operates as a unidirectional clamping device with glass-passivated chip junction construction, enabling fast response to transient overvoltages while maintaining low incremental surge resistance. Its 1.5KE molded epoxy case meets UL 94 V-0 flammability rating and supports lead-free reflow and wave soldering up to 275 °C for 10 s.
The device is characterized by a 100 pF junction capacitance at 0 V, making it suitable for moderate-speed signal line protection where capacitive loading must be constrained. It is rated for operation across –65 °C to +175 °C junction temperature and features a color band denoting cathode polarity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (min/max) | 22.2 V / 24.5 V - Breakdown voltage range at 1 mA test current; ensures consistent clamping threshold across production lots. |
| VC @ IPP | 32.4 V at 46 A - Maximum clamped voltage during 10/1000 μs surge; determines worst-case overvoltage seen by protected circuitry. |
| PPPM | 1500 W - Peak pulse power handling capability; enables robust suppression of high-energy transients like lightning-induced surges. |
| Junction Capacitance | 100 pF at 0 V - Low capacitance preserves signal integrity on data lines up to ~10 MHz without excessive attenuation or timing skew. |
| TJ max | +175 °C - Maximum junction temperature rating; supports reliable operation in high-ambient industrial environments with minimal derating. |
Pinout & Package
Package: 1.5KE molded epoxy case (DO-201AD), axial-leaded, RoHS-compliant, UL 497B listed. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink path during clamping | Connected to protected circuit's ground or low-side return; carries full surge current during overvoltage events. |
| Cathode | Transient voltage reference node | Connected to protected line (e.g., DC rail or signal); establishes clamping threshold relative to anode potential. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Ensures stable breakdown characteristics and long-term reliability under repetitive surge stress without parameter drift. |
| 1500 W peak pulse power (10/1000 μs) | Supports EN 61000-4-5 Level 4 (4 kV) surge immunity testing on 50 Ω source impedance circuits. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving clamping precision and downstream component safety. |
| UL 497B listing (file E136766) | Validates suitability for primary-side telecom line protection without additional certification effort in carrier-grade equipment. |
Applications
| Industrial Motor Drive Power Supply | Telecom DSL Line Interface |
|---|---|
Use Scenario: Protection of 24 V DC bus against inductive kickback from relay coils and solenoid drivers. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between rail and ground to limit transient excursions to ≤32.4 V. Use Value: Prevents latch-up or gate oxide damage in downstream MOSFETs and controllers by limiting overvoltage within safe SOA boundaries. | Use Scenario: Surge protection on POTS line interface circuits compliant with ITU-T K.20/K.21. IC Role / Device Role / Timing Role: Primary-level transient suppressor mounted at line entry point before isolation transformer and line driver IC. Use Value: Meets UL 497B requirements and withstands repeated 10/700 μs telecom surges up to 4 kV without degradation. |
| Automotive Body Control Module (BCM) Input | Consumer Appliance AC Mains Filter Stage |
Use Scenario: Input protection for 12 V supply pins on microcontroller-based BCMs exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Standoff-rated TVS providing fail-safe clamping during slow-rising (100 ms) and fast-rising (5 ns) transients. Use Value: Maintains 20 V VWM margin above nominal 12 V rail while clamping to 32.4 V-within MCU absolute maximum ratings. | Use Scenario: Secondary-side transient suppression on rectified AC outputs feeding SMPS controllers in washing machines or HVAC units. IC Role / Device Role / Timing Role: Unidirectional clamp absorbing energy from transformer leakage inductance and relay contact arcing. Use Value: 1500 W rating handles repetitive surges from motor commutation without thermal runaway, validated to JEDEC JESD22-A108F. |
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 | Lower peak pulse power (600 W), smaller SMB package (3.5 mm × 4.6 mm), higher VC (32.5 V at 17.3 A) | Best suited for space-constrained PCBs with lower-energy transients (e.g., USB or sensor interfaces) | Select when board area is critical and surge threat level is ≤Level 3 per IEC 61000-4-5. |
| 1.5KE20A | Identical electrical specs and 1.5KE package; differs only in packaging suffix (E3/73 vs. standard bulk/reel coding) | No functional difference; same UL listing, thermal performance, and clamping behavior | Use when sourcing flexibility or alternate reel configuration (e.g., 73 = 1000 pcs per reel) is required. |
Compared with SMBJ20A and 1.5KE20A, the LCE20-E3/73 offers identical clamping performance and UL 497B compliance in a RoHS-compliant, whisker-tested (JESD 201 Class 1A) variant optimized for high-volume telecom and industrial production with traceable reel packaging.
Availability
LCE20-E3/73 is available at Aetrix Electronics and suitable for industrial motor drives, telecom line interfaces, automotive body control modules, and consumer appliance power supplies requiring stable component supply and certified surge protection.
Supply support for LCE20-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, power efficiency, and industry-standard compliance.
The LCE series 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 UL listing and repeatable clamping are mandatory.
FAQ
What is the breakdown voltage tolerance for LCE20-E3/73?
The LCE20-E3/73 has a specified breakdown voltage (VBR) range of 22.2 V to 24.5 V at 1 mA test current, per the Vishay datasheet document 88357. This ±5% tolerance ensures predictable clamping onset across temperature and production lots, supporting robust design margins in 24 V systems where the LCE20-E3/73 is commonly deployed.
Is LCE20-E3/73 suitable for bidirectional transient protection?
No, the LCE20-E3/73 is a unidirectional TVS diode and must not be used alone for AC or bipolar signal line protection. For bidirectional applications such as telecom AC lines, two LCE20-E3/73 devices must be connected in series opposition (anode-to-anode or cathode-to-cathode), as shown in Figure 4 of the Vishay datasheet 88357.
What is the maximum junction temperature rating for LCE20-E3/73?
The LCE20-E3/73 is rated for a maximum junction temperature (TJ) of +175 °C, allowing operation in high-ambient environments such as enclosed industrial enclosures or under-hood automotive locations. Derating curves in Figure 2 of datasheet 88357 define allowable power dissipation versus ambient temperature for thermal design validation of the LCE20-E3/73.
Does LCE20-E3/73 meet UL 497B for telecom surge protection?
Yes, the LCE20-E3/73 is UL listed under file E136766 for Telecom Application Protection per UL 497B. This certification confirms its suitability for primary-side protection in DSL, POTS, and xDSL line interface circuits without requiring additional system-level testing for basic surge immunity compliance.
What is the lead finish and solderability specification for LCE20-E3/73?
The LCE20-E3/73 features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 for solderability, and passes JESD 201 Class 1A whisker testing. The E3 suffix indicates RoHS compliance and commercial-grade qualification, supporting both wave and reflow soldering processes with peak temperatures up to 275 °C for 10 seconds.
LCE20-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):
- 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-E3/73 FAQ
1.How can I place an order for LCE20-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for LCE20-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 LCE20-E3/73 reliable?
The price and inventory of LCE20-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 LCE20-E3/73 is usually 5 days.
3.What payment methods are accepted for LCE20-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LCE20-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LCE20-E3/73?
LCE20-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LCE20-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 LCE20-E3/73?
For technical support, including LCE20-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LCE20-E3/73 requirements.
6.How does Aetrix verify that LCE20-E3/73 is sourced from the original manufacturer or authorized distributors?
All LCE20-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 LCE20-E3/73 meets industry standards.
7.What is the process for return or replacement of LCE20-E3/73?
All LCE20-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with LCE20-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 LCE20-E3/73 part is unused and in its original packaging.
Return procedure for LCE20-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LCE20-E3/73 Tags
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