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Vishay General Semiconductor - Diodes Division LCE26A-E3/73
- Part No.:
- LCE26A-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
LCE26A-E3/73.pdf
- Description:
- TVS DIODE 26VWM 42.1VC 1.5KE
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LCE26A-E3/73 from Vishay General Semiconductor is a unidirectional low-capacitance TRANSZORB® transient voltage suppressor (TVS) diode designed for robust overvoltage protection of sensitive electronics. It features a 26.0 V stand-off voltage (VWM), 28.9–31.9 V breakdown voltage (VBR), 42.1 V maximum clamping voltage (VC) at 36 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - deployed in signal-line ESD/surge protection for industrial sensor interfaces.
For engineers reviewing the LCE26A-E3/73 datasheet, LCE26A-E3/73 pinout, LCE26A-E3/73 application, or LCE26A-E3/73 equivalent, key selection criteria include unidirectional polarity, 1.5KE package thermal performance, clamping ratio (VC/VBR ≈ 1.39), and UL 497B listing for telecom surge protection compliance.
Technical Context
This TVS diode uses a glass-passivated silicon junction to achieve fast response time (<1 ns) and low incremental surge resistance, enabling effective suppression of fast-rising transients from inductive switching or lightning-induced surges. Its unidirectional configuration provides reverse-biased clamping only, requiring correct polarity alignment relative to protected circuit DC bias.
The device operates within -65 °C to +175 °C junction temperature range and is rated for 6.5 W steady-state power dissipation on an infinite heatsink at 75 °C lead temperature. It meets JESD 22-B106 solderability (275 °C, 10 s) and JESD 201 Class 1A whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26.0 V - Maximum continuous reverse operating voltage before leakage exceeds 5 µA; sets upper limit for DC bias in protected line. |
| VBR (min/max) | 28.9 V / 31.9 V at 1.0 mA - Confirmed breakdown threshold range; ensures reliable triggering above normal operating voltage. |
| VC @ IPP | 42.1 V at 36 A - Clamped voltage during 10/1000 µs surge; defines worst-case overvoltage seen by downstream IC. |
| PPPM | 1500 W - Peak pulse power handling capability; supports high-energy transients without failure under defined waveform. |
| Junction Temp | -65 °C to +175 °C - Enables use in under-hood automotive, industrial motor drives, and outdoor telecom equipment. |
| Capacitance | 100 pF at 0 V - Low enough for <10 Mbps digital signal lines (e.g., RS-485, CAN) without signal integrity degradation. |
| Polarity | Unidirectional - Requires cathode (banded end) connected toward positive rail; not suitable for AC-coupled or bidirectional lines without dual-diode arrangement. |
Pinout & Package
Package: Case Style 1.5KE - molded epoxy body with matte tin-plated leads, UL 94 V-0 rated, RoHS-compliant (E3 suffix), 0.375" (9.5 mm) lead length, 0.042" (1.07 mm) lead diameter.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or negative reference; forms current path during reverse transient clamp. |
| Cathode (banded end) | High-side connection point | Connected to protected line; blocks normal operation up to VWM, avalanches at VBR to shunt surge to ground. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress. |
| 1500 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 Level 4 (4 kV) surge events when properly mounted with low-inductance layout. |
| UL 497B listed | Validated for telecom primary/secondary circuit protection per industry safety standard - reduces certification effort. |
| Low 100 pF junction capacitance | Minimizes signal distortion on high-speed data lines such as industrial Ethernet PHY interfaces or USB 2.0 upstream paths. |
| JESD 201 Class 1A whisker resistance | Prevents tin whisker growth in long-life applications like base station power supplies or railway signaling systems. |
Applications
| Industrial Sensor Signal Protection | Telecom Line Interface Protection |
|---|---|
Use Scenario: Protecting 4–20 mA current-loop transmitters and analog voltage outputs (0–10 V) from field-induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and system ground, triggered only during positive-going transients exceeding VWM. Use Value: Limits clamped voltage to ≤42.1 V, safeguarding 36 V-rated op-amps and ADC front-ends without adding series impedance or latency. | Use Scenario: Secondary-side protection of DSL/ADSL line interface circuits in customer premises equipment (CPE) against induced surges from nearby power lines. IC Role / Device Role / Timing Role: Standoff-rated TVS used in parallel with line transformer secondary windings to clamp common-mode surges per ITU-T K.21 recommendations. Use Value: UL 497B listing confirms suitability for telecom safety isolation boundaries; 100 pF avoids degrading ADSL2+ frequency response up to 2.2 MHz. |
| Automotive Body Control Module (BCM) | RS-485 Industrial Bus Node |
Use Scenario: Input protection for LIN bus receivers and GPIOs exposed to load-dump transients in vehicle door modules and lighting controllers. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to battery ground, absorbing 12 V system transients up to ±100 V per ISO 7637-2 Pulse 1/2a. Use Value: 175 °C max junction temperature supports placement near power relays; 36 A IPPM handles repetitive load-switching spikes without derating. | Use Scenario: Transient suppression on differential RS-485 data lines (A/B) in programmable logic controller (PLC) backplanes and distributed I/O racks. IC Role / Device Role / Timing Role: One LCE26A-E3/73 per line (A-to-GND and B-to-GND), providing asymmetric clamping aligned with common-mode voltage swing. Use Value: 42.1 V clamping ensures receiver input stays within -7 V to +12 V common-mode range; 100 pF avoids skew between A/B signals at 10 Mbps. |
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 | Same VWM (26 V), lower PPPM (600 W), smaller SMB package (lower thermal mass) | Lower surge energy handling; suited for PCB space-constrained consumer electronics, not industrial 1500 W requirements | Select LCE26A-E3/73 when full 1500 W IEC 61000-4-5 compliance is mandatory and board layout allows 1.5KE footprint. |
| 1.5KE26A | Identical electrical specs and 1.5KE package; differs only in branding (Vishay vs. generic) and traceability documentation | No functional difference; may lack UL 497B listing or E3 whisker certification depending on manufacturer lot | Choose LCE26A-E3/73 for guaranteed UL listing, JESD 201 Class 1A compliance, and Vishay General Semiconductor traceability. |
Compared with SMBJ26A and 1.5KE26A, the LCE26A-E3/73 delivers certified telecom-grade surge immunity and extended thermal endurance - critical for industrial control systems where single-event failure is unacceptable and long-term field reliability is verified via UL file E136766.
Availability
LCE26A-E3/73 is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom line protection, and automotive body control modules requiring stable component supply across multi-year production cycles.
Supply support for LCE26A-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 application-specific validation.
The LCE26A-E3/73 belongs to Vishay's TRANSZORB® low-capacitance TVS family, engineered specifically for high-energy transient suppression in harsh environments while maintaining signal fidelity on data and sensor lines.
FAQ
What is the clamping voltage of the LCE26A-E3/73 at its rated peak pulse current?
The LCE26A-E3/73 has a maximum clamping voltage (VC) of 42.1 V at 36 A peak pulse current (IPP) with a 10/1000 µs waveform. This value is measured per Figure 3 in Vishay document 88357 and defines the upper voltage limit imposed on protected circuitry during surge events. The LCE26A-E3/73 maintains this clamping performance across its specified operating temperature range.
Is the LCE26A-E3/73 suitable for bidirectional signal line protection?
No, the LCE26A-E3/73 is a unidirectional TVS diode and must be used with correct polarity - cathode (banded end) toward the positive side of the protected line. For AC or bidirectional signal lines like RS-485 or USB, two LCE26A-E3/73 devices in opposing polarity or a dedicated bidirectional part such as the LCE26CA is required. The LCE26A-E3/73 does not conduct in forward bias during normal operation.
Does the LCE26A-E3/73 meet UL 497B for telecom surge protection?
Yes, the LCE26A-E3/73 is UL listed for Telecom application protection per UL 497B, File Number E136766. This certification validates its use in primary and secondary circuits of telecom equipment for surge immunity up to specified levels. The LCE26A-E3/73 achieves this with its 1500 W peak pulse rating, controlled clamping behavior, and package construction meeting flammability and creepage requirements.
What is the junction capacitance of the LCE26A-E3/73 and how does it affect high-speed data lines?
The LCE26A-E3/73 has a maximum junction capacitance of 100 pF at 0 V, measured per Vishay document 88357. This low capacitance enables use on data lines up to ~10 Mbps without significant rise-time degradation or signal reflection. For example, on RS-485 nodes, the LCE26A-E3/73 introduces negligible loading compared to higher-capacitance alternatives, preserving eye diagram integrity in the LCE26A-E3/73 implementation.
How does the thermal performance of the LCE26A-E3/73 compare to smaller-package TVS diodes?
The LCE26A-E3/73 in the 1.5KE package offers superior thermal performance versus SMB or SMC packages: it delivers 6.5 W power dissipation on an infinite heatsink at 75 °C lead temperature and supports 175 °C maximum junction temperature. Smaller packages like SMBJ26A typically rate ≤3.0 W under same conditions. This makes the LCE26A-E3/73 preferred for high-reliability industrial applications where sustained surge repetition or elevated ambient temperatures exist.
LCE26A-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):
- 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-E3/73 FAQ
1.How can I place an order for LCE26A-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for LCE26A-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 LCE26A-E3/73 reliable?
The price and inventory of LCE26A-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 LCE26A-E3/73 is usually 5 days.
3.What payment methods are accepted for LCE26A-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LCE26A-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LCE26A-E3/73?
LCE26A-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LCE26A-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 LCE26A-E3/73?
For technical support, including LCE26A-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LCE26A-E3/73 requirements.
6.How does Aetrix verify that LCE26A-E3/73 is sourced from the original manufacturer or authorized distributors?
All LCE26A-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 LCE26A-E3/73 meets industry standards.
7.What is the process for return or replacement of LCE26A-E3/73?
All LCE26A-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with LCE26A-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 LCE26A-E3/73 part is unused and in its original packaging.
Return procedure for LCE26A-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LCE26A-E3/73 Tags
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