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Vishay General Semiconductor - Diodes Division LCE18A-E3/54
- Part No.:
- LCE18A-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
LCE18A-E3/54.pdf
- Description:
- TVS DIODE 18VWM 29.2VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:6,521
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Product details
Overview
LCE18A-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 18.0 V stand-off voltage (VWM), 20.0–22.1 V breakdown voltage (VBR), 29.2 V maximum clamping voltage at 51 A peak pulse current, 1500 W peak pulse power (10/1000 µs), and operates across –65 °C to +175 °C junction temperature.
For engineers reviewing the LCE18A-E3/54 datasheet, LCE18A-E3/54 pinout, LCE18A-E3/54 application, or LCE18A-E3/54 equivalent, key selection criteria include clamping performance under 10/1000 µs surge, unidirectional polarity for DC-side protection, RoHS-compliant matte tin-plated leads, and UL 497B listing for telecom surge protection.
Technical Context
The LCE18A-E3/54 employs a glass-passivated silicon junction for stable avalanche behavior and low incremental surge resistance. Its 1.5KE package supports high-energy transients with fast response time (<1 ns) and low leakage (<5 µA at VWM), enabling reliable protection of MOSFETs, ICs, and sensor interfaces against inductive switching spikes and lightning-induced surges.
Designed for single-pulse and repetitive surge conditions (0.01% duty cycle), it delivers consistent clamping at 29.2 V up to 51 A IPPM while maintaining thermal stability via its 175 °C max junction rating and 6.5 W steady-state power dissipation on infinite heatsink.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 18.0 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR (min/max) | 20.0 V / 22.1 V - Breakdown occurs within this range at 1 mA test current, defining turn-on threshold |
| VC @ IPPM | 29.2 V - Clamped voltage during 51 A 10/1000 µs surge, limiting downstream voltage stress |
| PPPM | 1500 W - Peak surge power handling capability per standardized waveform |
| IPPM | 51 A - Maximum non-repetitive peak pulse current the device safely conducts |
| TJ max | +175 °C - Enables operation in high-temperature industrial and automotive under-hood environments |
| Polarity | Unidirectional - Protects only against positive-going transients on cathode-grounded configuration |
Pinout & Package
Package: 1.5KE molded epoxy case (Case Style 1.5KE), UL 94 V-0 rated, with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102. Polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point during overvoltage event | Connected to protected line; conducts surge current toward cathode when VAK exceeds VBR |
| Cathode | Transient current return path and reference node | Typically tied to ground or low-impedance return; defines unidirectional conduction direction |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable, repeatable avalanche characteristics and long-term reliability under repeated surge stress |
| 1500 W peak pulse power (10/1000 µs) | Supports high-energy transients common in industrial motor drives and telecom line interfaces |
| UL 497B listed (E136766) | Validated for telecom primary circuit protection, reducing certification burden in communications equipment |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker resistance and global environmental compliance requirements |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients, improving protection margin for sensitive ICs |
Applications
| Industrial Motor Drive Control | Telecom Line Interface Protection |
|---|---|
Use Scenario: Protection of gate drivers and microcontroller I/O pins from inductive kickback during relay or solenoid switching. IC Role / Device Role / Timing Role: Unidirectional TVS placed between DC supply rail and ground to clamp voltage spikes before they reach logic-level components. Use Value: Limits transient voltage to ≤29.2 V at 51 A, preventing latch-up or permanent damage to 3.3 V/5 V control ICs. | Use Scenario: Surge suppression on POTS or DSL line interface circuits exposed to lightning-induced surges per ITU-T K.20/K.21. IC Role / Device Role / Timing Role: Primary protection device in series with line transformer, referenced to system ground. Use Value: UL 497B listing and 1500 W rating ensure compliance with telecom infrastructure surge immunity standards. |
| Automotive Body Control Module (BCM) | Consumer Sensor Signal Conditioning |
Use Scenario: Safeguarding LIN bus transceivers and power window motor controllers against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: DC-side TVS on 12 V supply input to BCM subassembly. Use Value: 175 °C max junction temperature enables placement near heat-generating power stages without derating. | Use Scenario: Protecting analog outputs of temperature/humidity sensors connected to MCU ADC inputs. IC Role / Device Role / Timing Role: Low-leakage (≤5 µA at 18 V) unidirectional clamp on sensor output line to ground. Use Value: Prevents ESD-induced offset drift or saturation while introducing negligible error in DC-coupled signal paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18A | Same VWM (18 V), lower PPPM (600 W), smaller SMB package (3.5 mm × 4.5 mm) | Lower energy handling; suited for board space-constrained consumer electronics, not heavy industrial surges | Select SMBJ18A only if surge threat level is limited to IEC 61000-4-5 Level 3 (0.5 kV line-to-line) and PCB area is critical. |
| 1.5KE18A | Identical electrical specs and 1.5KE package; differs only in packaging format (bulk vs. tape-and-reel E3/54) | No functional difference; same UL listing, thermal, and surge performance | 1.5KE18A is functionally identical but lacks RoHS-compliant E3 plating and 13" reel delivery-choose LCE18A-E3/54 for automated SMT assembly and compliance traceability. |
Compared with SMBJ18A and 1.5KE18A, the LCE18A-E3/54 provides certified telecom-grade surge handling (UL 497B), RoHS-compliant matte tin leads for solderability assurance, and factory-optimized tape-and-reel packaging for high-volume production, making it optimal for industrial and telecom OEMs requiring full compliance documentation and supply chain continuity.
Availability
LCE18A-E3/54 is available at Aetrix Electronics and suitable for industrial motor drive control, telecom line interface protection, and automotive body control module designs requiring stable component supply, UL-certified surge performance, and RoHS-compliant manufacturing.
Supply support for LCE18A-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, power handling, and industry-standard certifications.
The LCE18A-E3/54 belongs to Vishay's Low Capacitance TRANSZORB® family, engineered specifically for high-energy transient suppression in DC power and signal lines where clamping precision, thermal robustness, and regulatory compliance are critical.
FAQ
What is the clamping voltage of the LCE18A-E3/54 under a 10/1000 µs surge?
The LCE18A-E3/54 clamps to a maximum of 29.2 V when subjected to its rated 51 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is guaranteed per the Vishay datasheet (Doc. #88357) and defines the upper voltage limit imposed on protected circuitry during surge events.
Is the LCE18A-E3/54 suitable for AC line protection?
No-the LCE18A-E3/54 is unidirectional and rated only for DC-side protection. For AC line protection, Vishay recommends using two LCE18A-E3/54 devices in anti-parallel configuration, as specified in Figure 4 of the datasheet, to handle bidirectional transients on telecom or analog signal lines.
Does the LCE18A-E3/54 meet UL 497B requirements?
Yes-the LCE18A-E3/54 is UL listed for Telecom application protection per UL 497B (File E136766), confirming its suitability for primary circuit surge protection in telecommunications infrastructure equipment without additional external validation.
What is the lead finish and solderability specification for LCE18A-E3/54?
The LCE18A-E3/54 features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and the E3 suffix confirms qualification to JESD 201 Class 1A whisker testing. It supports solder dipping at 275 °C for up to 10 seconds per JESD 22-B106.
How does the LCE18A-E3/54 differ from the standard 1.5KE18A?
The LCE18A-E3/54 shares identical electrical and thermal specifications with 1.5KE18A but adds RoHS-compliant matte tin plating (E3), 13" paper tape-and-reel packaging (suffix /54), and explicit UL 497B listing-making LCE18A-E3/54 the preferred choice for automated SMT production and regulated telecom/industrial markets.
LCE18A-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):
- 18V
- Voltage - Breakdown (Min):
- 20V
- Voltage - Clamping (Max) @ Ipp:
- 29.2V
- Current - Peak Pulse (10/1000µs):
- 51A
- 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
LCE18A-E3/54 FAQ
1.How can I place an order for LCE18A-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for LCE18A-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 LCE18A-E3/54 reliable?
The price and inventory of LCE18A-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 LCE18A-E3/54 is usually 5 days.
3.What payment methods are accepted for LCE18A-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LCE18A-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LCE18A-E3/54?
LCE18A-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LCE18A-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 LCE18A-E3/54?
For technical support, including LCE18A-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LCE18A-E3/54 requirements.
6.How does Aetrix verify that LCE18A-E3/54 is sourced from the original manufacturer or authorized distributors?
All LCE18A-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 LCE18A-E3/54 meets industry standards.
7.What is the process for return or replacement of LCE18A-E3/54?
All LCE18A-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with LCE18A-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 LCE18A-E3/54 part is unused and in its original packaging.
Return procedure for LCE18A-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LCE18A-E3/54 Tags
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