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Vishay General Semiconductor - Diodes Division LCE8.5-E3/54
- Part No.:
- LCE8.5-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
LCE8.5-E3/54.pdf
- Description:
- TVS DIODE 8.5VWM 15.9VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:5,890
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Product details
Overview
LCE8.5-E3/54 from Vishay General Semiconductor is a unidirectional low-capacitance TRANSZORB® transient voltage suppressor (TVS) diode designed for robust overvoltage protection of sensitive signal lines. It features a 8.5 V stand-off voltage (VWM), 9.44–10.4 V breakdown voltage (VBR), 1500 W peak pulse power (10/1000 μs), 14.4 V clamping voltage at 50 A IPP, and operates from –65 °C to +175 °C junction temperature.
For engineers reviewing the LCE8.5-E3/54 datasheet, LCE8.5-E3/54 pinout, LCE8.5-E3/54 application, or LCE8.5-E3/54 equivalent, key selection criteria include clamping performance under 50 A surge current, unidirectional polarity with cathode band marking, 1.5KE package compatibility, and suitability for telecom-grade (UL 497B) AC/DC line and sensor interface protection.
Technical Context
The LCE8.5-E3/54 employs a glass-passivated silicon junction for stable avalanche behavior and fast response (<1 ns). Its low incremental surge resistance ensures minimal voltage overshoot during transient events, while the 100 pF junction capacitance at 0 V supports high-speed signal integrity in data lines.
This TVS is rated for repetitive 10/1000 μs surges at 0.01 % duty cycle and derates linearly above 25 °C ambient-maintaining 6.5 W steady-state power dissipation at TL = 75 °C on an infinite heatsink. Polarity is unidirectional, with cathode indicated by a color band.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - Maximum continuous reverse operating voltage before conduction begins; sets upper limit for normal signal swing. |
| VBR (min/max) | 9.44 V / 10.4 V - Breakdown occurs within this range at 1 mA test current; defines reliable turn-on threshold. |
| VC @ IPP | 14.4 V at 50 A - Clamped voltage during 10/1000 μs surge; determines maximum stress imposed on protected IC. |
| PPPM | 1500 W - Peak transient power handling capability; enables protection against IEC 61000-4-5 Level 4 surges. |
| CJ @ 0 V | 100 pF - Junction capacitance; low enough for USB 2.0, RS-485, and CAN FD signal line protection without distortion. |
| TJ max | +175 °C - Maximum junction temperature; supports operation in under-hood automotive and industrial power supply environments. |
| Polarity | Unidirectional - Blocks reverse voltage only; requires correct orientation relative to DC bias in circuit. |
Pinout & Package
Package: 1.5KE molded epoxy case (JEDEC DO-201AD), RoHS-compliant matte tin-plated leads, UL 94 V-0 rated molding compound, cathode denoted by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or lower-potential rail; conducts during positive transients when cathode is biased higher. |
| Cathode | High-side connection point | Marked with color band; connected to protected line; clamps voltage to VC when transient exceeds VBR. |
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) | Withstands high-energy lightning-induced surges per IEC 61000-4-5, enabling single-device protection for AC mains inputs. |
| Low 100 pF junction capacitance | Minimizes signal attenuation and timing skew on high-speed interfaces such as Ethernet PHYs and industrial fieldbus lines. |
| UL 497B listed for telecom applications | Validated for primary-side protection in telephone line interface circuits, reducing certification effort for telecom equipment. |
| Solder dip rated 275 °C for 10 s | Compatible with standard wave soldering processes without degradation, supporting high-yield automated assembly. |
Applications
| Industrial Sensor Interface Protection | Telecom Line Interface (POTS/DSL) |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in factory automation cabinets exposed to relay coil flyback and ESD. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor output and ADC input to clamp transients before they reach precision front-end circuitry. Use Value: Limits induced voltage to ≤14.4 V during 50 A surges, preserving ADC accuracy and preventing latch-up in microcontrollers. | Use Scenario: Primary-side surge suppression on telephone line interface cards in DSLAMs and VoIP gateways compliant with UL 497B. IC Role / Device Role / Timing Role: Standoff-rated TVS connected across tip/ring lines to shunt lightning-induced common-mode surges before transformer coupling. Use Value: Maintains 8.5 V DC blocking while clamping 10/1000 μs surges to 14.4 V, meeting GR-1089-CORE requirements for telecom infrastructure. |
| Automotive Body Control Module (BCM) Inputs | USB 2.0 Data Line Protection |
Use Scenario: Protecting wake-up inputs and LIN bus pins in BCMs subjected to load dump and ISO 7637-2 pulse 1/2a/5a. IC Role / Device Role / Timing Role: Unidirectional TVS mounted directly at connector entry point to absorb energy before it propagates into MCU GPIOs. Use Value: Withstands 175 °C junction temperature and delivers 14.4 V clamping at 50 A, ensuring survivability in engine bay environments. | Use Scenario: ESD and surge protection on D+ and D– lines of USB 2.0 host ports in embedded medical devices and kiosks. IC Role / Device Role / Timing Role: Low-capacitance TVS placed in series with data lines to suppress ±15 kV HBM ESD without distorting 480 Mbps signaling. Use Value: 100 pF capacitance avoids signal rise-time degradation, while 14.4 V clamping prevents damage to USB transceivers during hot-plug events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0A | Lower VWM (8.0 V), same 1500 W PPPM, but SMB package (smaller footprint, lower thermal mass) | Better suited for space-constrained PCBs; less effective in high-ambient-temp environments due to lower PD (3.0 W vs. 6.5 W) | Select SMBJ8.0A only if board area is critical and thermal management ensures TJ stays below 150 °C. |
| 1.5KE8.5A | Identical electrical specs and 1.5KE package; differs only in E3/54 tape-and-reel packaging vs. bulk or alternate reel codes | No functional difference; identical use cases and mounting | 1.5KE8.5A is a direct form-fit-function alternative with identical performance-choose based on preferred logistics format. |
Compared with SMBJ8.0A and 1.5KE8.5A, the LCE8.5-E3/54 offers superior thermal robustness (6.5 W PD) in the same 1.5KE outline, making it preferable for industrial power supplies and telecom line cards where sustained surge repetition or elevated ambient temperatures are expected.
Availability
LCE8.5-E3/54 is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom line protection, automotive body control modules, and USB 2.0 data line protection requiring stable component supply and UL 497B compliance.
Supply support for LCE8.5-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 optimization.
The LCE series belongs to Vishay's TRANSZORB® low-capacitance TVS family, engineered specifically for high-energy transient suppression in telecom, industrial, and automotive signal-line applications where clamping precision and thermal resilience are critical.
FAQ
What is the clamping voltage of the LCE8.5-E3/54 at its rated peak pulse current?
The LCE8.5-E3/54 has a maximum clamping voltage (VC) of 14.4 V at 50 A peak pulse current (IPP) under a 10/1000 μs waveform. This value is measured per Figure 3 in the official Vishay datasheet (Doc. #88357) and represents the upper voltage limit imposed on protected circuitry during surge events. The LCE8.5-E3/54 maintains this clamping performance across its qualified temperature range.
Is the LCE8.5-E3/54 suitable for bidirectional signal line protection?
No-the LCE8.5-E3/54 is a unidirectional TVS diode and must be used with correct polarity: cathode toward the protected line, anode to ground. For bidirectional AC signal protection (e.g., telephone lines), two LCE8.5-E3/54 units must be connected in series opposition. The LCE8.5-E3/54 itself does not provide symmetrical clamping in both directions.
Does the LCE8.5-E3/54 meet UL 497B requirements for telecom surge protection?
Yes-the LCE8.5-E3/54 is UL listed under file E136766 for Telecom Application Protection per UL 497B. This certification confirms its suitability for primary-side surge suppression in POTS, DSL, and VoIP line interface circuits. The LCE8.5-E3/54 achieves this rating using its 1500 W peak pulse power and controlled clamping behavior.
What is the junction capacitance of the LCE8.5-E3/54 and how does it affect high-speed data lines?
The LCE8.5-E3/54 exhibits a maximum junction capacitance of 100 pF at 0 V, measured per the Vishay datasheet. This low value minimizes signal distortion and rise-time degradation on interfaces up to 480 Mbps (e.g., USB 2.0), making the LCE8.5-E3/54 appropriate for protecting high-speed data lines without requiring layout compensation.
Can the LCE8.5-E3/54 be used in automotive under-hood applications?
Yes-the LCE8.5-E3/54 is rated for a maximum junction temperature of +175 °C and meets JESD22-A108 reliability standards. Its glass-passivated junction and 1.5KE package support operation in high-ambient environments such as engine control units and body control modules, provided PCB thermal design sustains junction temperature within spec during surge events. The LCE8.5-E3/54 is commonly deployed in ISO 7637-2 compliant automotive protection schemes.
LCE8.5-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):
- 8.5V
- Voltage - Breakdown (Min):
- 9.44V
- Voltage - Clamping (Max) @ Ipp:
- 15.9V
- Current - Peak Pulse (10/1000µs):
- 94A
- 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
LCE8.5-E3/54 FAQ
1.How can I place an order for LCE8.5-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for LCE8.5-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 LCE8.5-E3/54 reliable?
The price and inventory of LCE8.5-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 LCE8.5-E3/54 is usually 5 days.
3.What payment methods are accepted for LCE8.5-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LCE8.5-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LCE8.5-E3/54?
LCE8.5-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LCE8.5-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 LCE8.5-E3/54?
For technical support, including LCE8.5-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LCE8.5-E3/54 requirements.
6.How does Aetrix verify that LCE8.5-E3/54 is sourced from the original manufacturer or authorized distributors?
All LCE8.5-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 LCE8.5-E3/54 meets industry standards.
7.What is the process for return or replacement of LCE8.5-E3/54?
All LCE8.5-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with LCE8.5-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 LCE8.5-E3/54 part is unused and in its original packaging.
Return procedure for LCE8.5-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LCE8.5-E3/54 Tags
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