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Vishay General Semiconductor - Diodes Division LCE26A-E3/54
- Part No.:
- LCE26A-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
LCE26A-E3/54.pdf
- Description:
- TVS DIODE 26VWM 42.1VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:8,466
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Product details
Overview
LCE26A-E3/54 from Vishay General Semiconductor is a unidirectional low-capacitance TRANSZORB® transient voltage suppressor (TVS) diode in the 1.5KE package, rated for 26.0 V standoff voltage (VWM), 28.9–31.9 V breakdown voltage (VBR), 42.1 V clamping voltage at 36 A peak pulse current, and 1500 W peak pulse power with 10/1000 µs waveform - designed to protect MOSFETs, ICs, and sensor signal lines against inductive switching transients and lightning surges.
For engineers reviewing the LCE26A-E3/54 datasheet, LCE26A-E3/54 pinout, LCE26A-E3/54 application, or LCE26A-E3/54 equivalent, key selection considerations include its unidirectional polarity, 100 pF junction capacitance at 0 V, 175 °C maximum junction temperature, UL 497B listing for telecom protection, and compatibility with J-STD-002 solderability standards.
Technical Context
The LCE26A-E3/54 employs a glass-passivated chip junction for stable avalanche performance and low incremental surge resistance. Its fast response time and excellent clamping capability enable reliable suppression of sub-microsecond transients without sacrificing signal integrity on sensitive analog or digital lines.
Designed for repetitive surge duty cycles up to 0.01 %, it operates across -65 °C to +175 °C and maintains specified clamping behavior under derated conditions per the power derating curve. The device features matte tin-plated leads compliant with JESD 22-B102 and passes JESD 201 Class 1A whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26.0 V - Maximum continuous reverse operating voltage before conduction begins; defines safe blocking range for DC-biased signal or power rails. |
| VBR (min/max) | 28.9 V / 31.9 V at 1.0 mA test current - Confirmed avalanche onset range; ensures predictable turn-on during overvoltage events. |
| VC @ IPP | 42.1 V at 36 A - Clamped voltage during 10/1000 µs surge; limits downstream stress on protected ICs or MOSFETs. |
| PPPM | 1500 W - Peak pulse power handling capacity; supports high-energy transients from inductive load switching. |
| Junction Capacitance | 100 pF at 0 V - Low capacitance preserves signal rise time and bandwidth in data line protection applications. |
| TJ max. | 175 °C - Enables operation in high-temperature industrial or automotive under-hood environments without thermal shutdown. |
Pinout & Package
Package: 1.5KE molded epoxy case (Case Style 1.5KE), RoHS-compliant, UL 94 V-0 rated, with color band indicating cathode terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward bias; connected to protected circuit ground or low-side reference. | Provides low-impedance path to ground when TVS conducts; must be routed with minimal inductance for effective clamping. |
| Cathode | Current exit point during reverse avalanche; marked by color band; connects to protected line (e.g., signal or supply rail). | Defines unidirectional protection direction; reverse-biased during normal operation and avalanches during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable, repeatable avalanche characteristics over lifetime and temperature, critical for long-term reliability in industrial systems. |
| 1500 W peak pulse power (10/1000 µs) | Handles high-energy transients from relay coil de-energization or motor commutation without degradation. |
| UL 497B listed (File E136766) | Validates suitability for telecom interface protection, reducing certification effort for carrier-grade equipment designs. |
| 100 pF junction capacitance | Minimizes signal distortion on high-speed lines such as RS-485, CAN, or sensor analog outputs. |
| Matte tin plating (J-STD-002 compliant) | Guarantees robust solder joint formation and intermetallic stability during reflow and thermal cycling. |
Applications
| Industrial Motor Control | Telecom Line Interface |
|---|---|
Use Scenario: Protection of gate drivers and microcontroller I/O pins from back-EMF spikes generated by solenoid or BLDC motor switching. IC Role / Device Role: Unidirectional TVS placed between MOSFET gate and source, or across microcontroller input pins. Use Value: Limits transient voltage to ≤42.1 V, preventing latch-up or oxide damage while maintaining <100 pF loading on control signals. | Use Scenario: Surge protection on POTS or xDSL line interfaces exposed to lightning-induced surges per ITU-T K.20/K.21. IC Role / Device Role: Primary protection element in series with line transformer secondary, referenced to system ground. Use Value: UL 497B listing and 1500 W rating ensure compliance with telecom safety and immunity standards without external coordination components. |
| Automotive Sensor Signal Lines | Consumer Appliance Power Supply Inputs |
Use Scenario: Shielding analog output lines of pressure or temperature sensors from load dump and ISO 7637-2 pulse 1/2a transients. IC Role / Device Role: Low-capacitance TVS placed directly at sensor connector, shunting surge energy to chassis ground. Use Value: 100 pF capacitance avoids filtering sensor bandwidth; 175 °C TJ max enables placement near hot engine bay components. | Use Scenario: Input-stage protection on AC-DC power supplies in washing machines or HVAC controllers subjected to mains-borne surges. IC Role / Device Role: Parallel-connected TVS across bridge rectifier output or bulk capacitor terminals. Use Value: 26.0 V VWM allows use after 24 V nominal DC bus; 1500 W rating absorbs IEC 61000-4-5 Level 4 surges without failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26A | 600 W peak pulse power (vs. 1500 W); SMA package (smaller footprint, lower thermal mass) | Lower power handling limits use to lower-energy transients; less suitable for industrial motor drive snubbing | Select SMBJ26A only where space constraints dominate and surge energy is confirmed ≤600 W. |
| 1.5KE26A | Identical electrical specs and 1.5KE package; differs only in packaging suffix (E3/54 vs. standard tape/reel) | No functional difference; same UL listing, thermal, and clamping performance | 1.5KE26A is a direct form-fit-function alternative with identical datasheet parameters and qualification. |
Compared with SMBJ26A and 1.5KE26A, the LCE26A-E3/54 offers the full 1500 W surge rating in a RoHS-compliant, whisker-tested 1.5KE package with verified UL 497B listing - making it preferred for high-reliability telecom and industrial applications where both energy handling and certification matter.
Availability
LCE26A-E3/54 is available at Aetrix Electronics and suitable for industrial motor control, telecom line interface, and automotive sensor protection requiring stable component supply, long-lifecycle support, and traceable RoHS-compliant sourcing.
Supply support for LCE26A-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 qualification.
The LCE26A-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 long-term stability are critical.
FAQ
What is the clamping voltage of the LCE26A-E3/54 at its rated peak pulse current?
The LCE26A-E3/54 has a maximum clamping voltage (VC) of 42.1 V at 36 A peak pulse current (IPP) under the standard 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 circuits during surge events. Maintaining this clamping level ensures downstream ICs and MOSFETs remain within safe operating voltage margins.
Is the LCE26A-E3/54 suitable for bidirectional signal line protection?
No, the LCE26A-E3/54 is a unidirectional TVS diode and must not be used alone for AC or bidirectional signal protection. As stated in the Vishay application note, two LCE26A-E3/54 units connected in parallel but opposite polarity are required for AC line protection. For single-device bidirectional solutions, consider the bi-directional variant LCE26CA-E3/54 instead.
Does the LCE26A-E3/54 meet UL 497B requirements for telecom surge protection?
Yes, the LCE26A-E3/54 is UL listed under file number E136766 for Telecom application protection per UL 497B. This certification confirms its suitability for primary and secondary circuit protection in telecom equipment, including DSL modems, PBX systems, and base station interfaces - eliminating need for additional external validation in certified designs.
What is the maximum junction temperature rating for the LCE26A-E3/54?
The LCE26A-E3/54 has a maximum junction temperature (TJ) rating of +175 °C, as specified in the "Maximum Ratings" table of Vishay Document #88357. This high-temperature capability supports deployment in under-hood automotive modules, industrial drives, and enclosed power supplies where ambient temperatures exceed 100 °C and thermal management is constrained.
How does the LCE26A-E3/54 differ from standard 1.5KE26A in terms of reliability testing?
The LCE26A-E3/54 includes E3 suffix qualification: matte tin plating compliant with J-STD-002 and JESD 22-B102, plus JESD 201 Class 1A whisker testing. While electrically identical to 1.5KE26A, the LCE26A-E3/54 adds enhanced process controls for solderability and tin whisker mitigation - critical for high-reliability, long-lifecycle deployments in aerospace and medical-adjacent industrial systems.
LCE26A-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):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 42.1V
- Current - Peak Pulse (10/1000µs):
- 36A
- 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
LCE26A-E3/54 FAQ
1.How can I place an order for LCE26A-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for LCE26A-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 LCE26A-E3/54 reliable?
The price and inventory of LCE26A-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 LCE26A-E3/54 is usually 5 days.
3.What payment methods are accepted for LCE26A-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LCE26A-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LCE26A-E3/54?
LCE26A-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LCE26A-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 LCE26A-E3/54?
For technical support, including LCE26A-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LCE26A-E3/54 requirements.
6.How does Aetrix verify that LCE26A-E3/54 is sourced from the original manufacturer or authorized distributors?
All LCE26A-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 LCE26A-E3/54 meets industry standards.
7.What is the process for return or replacement of LCE26A-E3/54?
All LCE26A-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with LCE26A-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 LCE26A-E3/54 part is unused and in its original packaging.
Return procedure for LCE26A-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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