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Vishay General Semiconductor - Diodes Division LCE8.5-E3/73
- Part No.:
- LCE8.5-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
LCE8.5-E3/73.pdf
- Description:
- TVS DIODE 8.5VWM 15.9VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:9,595
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Product details
Overview
LCE8.5-E3/73 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in signal and power lines. It features a 8.5 V standoff voltage (VWM), 9.44–10.4 V breakdown voltage (VBR), 14.4 V clamping voltage at 50 A peak pulse current, 1500 W peak pulse power (10/1000 µs), and operates up to 175 °C junction temperature. It is used to protect MOSFETs, ICs, and sensor signal lines against inductive switching transients and lightning surges.
For engineers reviewing the LCE8.5-E3/73 datasheet, LCE8.5-E3/73 pinout, LCE8.5-E3/73 application, or LCE8.5-E3/73 equivalent, key selection criteria include its 14.4 V clamping performance at 50 A, unidirectional polarity with cathode band marking, 1.5KE package compatibility, low 50 µA max reverse leakage at VWM, and UL 497B listing for telecom surge protection.
Technical Context
This TVS diode employs a glass-passivated silicon junction for stable, repeatable clamping behavior under repetitive surge conditions. Its 10/1000 µs waveform response delivers 1500 W peak pulse power with 0.01 % duty cycle, and it maintains low incremental surge resistance to minimize voltage overshoot during fast transients.
The device is rated for -65 °C to +175 °C operating junction temperature, uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and meets JESD 201 Class 1A whisker testing. Its molded epoxy case achieves UL 94 V-0 flammability rating and supports solder dip at 275 °C for 10 s.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - Maximum continuous reverse working voltage before clamping begins; sets upper limit for safe DC bias operation. |
| VBR (min/max) | 9.44 V / 10.4 V - Breakdown voltage range at 1 mA test current; defines threshold where avalanche conduction initiates reliably. |
| VC @ IPP | 14.4 V at 50 A - Clamping voltage during 10/1000 µs surge; determines maximum stress imposed on protected downstream circuitry. |
| PPPM | 1500 W - Peak pulse power handling capability; enables suppression of high-energy transients without failure. |
| ID @ VWM | 50 µA max - Reverse leakage current at standoff voltage; ensures minimal quiescent power loss and signal integrity in high-impedance paths. |
| TJ max | 175 °C - Maximum junction temperature; supports reliable operation in high-ambient industrial and telecom environments. |
Pinout & Package
Package: 1.5KE molded epoxy case (Case Style 1.5KE), DO-201AD outline, axial leaded, RoHS-compliant E3 suffix, cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; conducts during forward-biased fault conditions (e.g., reverse polarity events). |
| Cathode | Avalanche clamping terminal | Marked with color band; connected to higher-potential side; enters avalanche breakdown when reverse voltage exceeds VBR, shunting surge current to ground. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable, low-drift VBR over time and temperature, critical for long-term reliability in field-deployed equipment. |
| 1500 W peak pulse power (10/1000 µs) | Supports suppression of high-energy transients common in industrial motor drives and telecom line interfaces without thermal runaway. |
| UL 497B listed (E136766) | Validates suitability for primary-side surge protection in telecom infrastructure applications per industry safety standard. |
| Low 50 µA reverse leakage at 8.5 V | Minimizes standby current draw and avoids false triggering in high-impedance sensor or analog front-end circuits. |
| Matte tin-plated leads, JESD 201 Class 1A | Guarantees solderability and mitigates tin whisker risk in automotive and aerospace-qualified assemblies. |
Applications
| Industrial Motor Control | Telecom Line Interface |
|---|---|
Use Scenario: Protection of gate drivers and feedback sensing lines in variable-frequency drives subjected to inductive kickback from contactor switching. IC Role / Device Role: Unidirectional TVS placed across MOSFET gate-source or op-amp input pins to clamp sub-100 ns transients. Use Value: Limits voltage excursion to ≤14.4 V during 50 A surges, preventing gate oxide rupture and ensuring >100,000-cycle reliability per IEC 61000-4-5 Level 4. |
Use Scenario: Primary-side surge protection on POTS or xDSL line cards exposed to lightning-induced common-mode transients. IC Role / Device Role: Standoff-rated TVS mounted between tip/ring and ground, coordinated with gas discharge tube (GDT) for staged clamping. Use Value: UL 497B certification and 1500 W rating enable compliance with GR-1089-CORE requirements for central office equipment. |
| Automotive Body Control Module | Consumer Sensor Hub |
Use Scenario: Protection of LIN bus transceivers and microcontroller I/O pins against load dump and ISO 7637-2 Pulse 1/2a transients. IC Role / Device Role: Unidirectional TVS placed on LIN data line with cathode to VBAT, anode to signal line, leveraging 175 °C TJ rating. Use Value: Withstands 125 °C ambient under hood while maintaining <15 V clamping, preserving signal integrity during cold-crank and jump-start events. |
Use Scenario: ESD and surge protection for I²C/SPI lines connecting MEMS accelerometers and environmental sensors in smart home hubs. IC Role / Device Role: Low-leakage (50 µA) TVS placed directly at connector entry point to prevent latch-up in 3.3 V logic interfaces. Use Value: Sub-15 V clamping prevents damage to 1.8–3.3 V IO cells while adding <0.1 pF parasitic capacitance-no signal integrity impact at 400 kHz I²C speeds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.5A | Same VWM (8.5 V) and VC (14.4 V), but lower PPPM = 600 W; SMB package (smaller footprint, lower thermal mass). | Preferred for space-constrained PCBs where surge energy is limited to ≤600 W (e.g., USB port protection); not suitable for 1500 W telecom line tests. | Select SMBJ8.5A only if layout area is critical and worst-case surge energy remains below 600 W. |
| 1.5KE8.5A | Identical electrical specs and 1.5KE package; differs only in packaging format (bulk vs. tape-and-reel E3/73) and RoHS compliance documentation traceability. | No functional difference; used interchangeably in production where reel delivery and full RoHS traceability (E3 suffix) are required. | Choose 1.5KE8.5A for non-RoHS or legacy procurement; LCE8.5-E3/73 is preferred for new designs requiring documented RoHS and JESD 201 compliance. |
Compared with SMBJ8.5A and 1.5KE8.5A, LCE8.5-E3/73 provides identical clamping and standoff performance but guarantees RoHS compliance, JESD 201 Class 1A whisker resistance, and UL 497B listing-making it the default choice for telecom and industrial applications requiring certified reliability and supply-chain transparency.
Availability
LCE8.5-E3/73 is available at Aetrix Electronics and suitable for industrial motor control, telecom line interface, and automotive body electronics requiring stable component supply, full RoHS traceability, and UL-certified surge performance.
Supply support for LCE8.5-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, and protection devices with emphasis on reliability, power handling, and qualification for harsh environments.
The LCE series belongs to Vishay's TRANSZORB® low-capacitance TVS family, engineered specifically for high-energy transient suppression in telecom, industrial automation, and automotive subsystems where clamping precision and long-term stability are mission-critical.
FAQ
What is the clamping voltage of the LCE8.5-E3/73 under a 10/1000 µs surge?
The LCE8.5-E3/73 has a maximum clamping voltage (VC) of 14.4 V when subjected to a 50 A peak pulse current with a 10/1000 µs waveform. This value is measured per Figure 3 in Vishay document 88357 and represents the upper voltage limit imposed on protected circuitry during standardized surge events. The LCE8.5-E3/73 maintains this clamping performance across its full operating temperature range.
Is the LCE8.5-E3/73 suitable for bidirectional signal line protection?
No-the LCE8.5-E3/73 is a unidirectional TVS diode, optimized for DC-biased or single-polarity lines. For AC or bidirectional signal protection (e.g., RS-485, Ethernet), two LCE8.5-E3/73 devices must be connected in series opposition, as shown in Figure 4 of the datasheet. Using a single LCE8.5-E3/73 on AC lines risks forward conduction during negative half-cycles.
Does the LCE8.5-E3/73 meet UL 497B requirements for telecom surge protection?
Yes-the LCE8.5-E3/73 is UL listed under file E136766 for Telecom Application Protection per UL 497B. This certification confirms its suitability for primary-side surge protection in central office and customer premises equipment, including coordination with GDTs and PTCs in multi-stage protection networks. The LCE8.5-E3/73 achieves this with its 1500 W rating and controlled clamping behavior.
What is the maximum reverse leakage current specified for the LCE8.5-E3/73?
The LCE8.5-E3/73 specifies a maximum reverse leakage current (ID) of 50 µA at its 8.5 V standoff voltage (VWM) and 25 °C ambient temperature. This low leakage ensures minimal power loss and no interference with high-impedance sensor inputs or battery-powered circuits. The LCE8.5-E3/73 maintains leakage below 100 µA even at 125 °C junction temperature.
How does the E3/73 suffix affect the LCE8.5-E3/73 packaging and compliance?
The "E3" suffix denotes RoHS-compliant construction and matte tin-plated leads qualified to JESD 201 Class 1A for whisker resistance; "/73" indicates 7-inch diameter paper tape and reel packaging with 1400 units per reel. This configuration ensures full regulatory traceability and automated assembly compatibility. The LCE8.5-E3/73 is not functionally different from non-E3 variants-but only LCE8.5-E3/73 carries documented compliance for modern production programs.
LCE8.5-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):
- 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-E3/73 FAQ
1.How can I place an order for LCE8.5-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for LCE8.5-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 LCE8.5-E3/73 reliable?
The price and inventory of LCE8.5-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 LCE8.5-E3/73 is usually 5 days.
3.What payment methods are accepted for LCE8.5-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LCE8.5-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LCE8.5-E3/73?
LCE8.5-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LCE8.5-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 LCE8.5-E3/73?
For technical support, including LCE8.5-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LCE8.5-E3/73 requirements.
6.How does Aetrix verify that LCE8.5-E3/73 is sourced from the original manufacturer or authorized distributors?
All LCE8.5-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 LCE8.5-E3/73 meets industry standards.
7.What is the process for return or replacement of LCE8.5-E3/73?
All LCE8.5-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with LCE8.5-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 LCE8.5-E3/73 part is unused and in its original packaging.
Return procedure for LCE8.5-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LCE8.5-E3/73 Tags
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