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Vishay General Semiconductor - Diodes Division LCE8.5A-E3/54
- Part No.:
- LCE8.5A-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
LCE8.5A-E3/54.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:3,012
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Product details
Overview
LCE8.5A-E3/54 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the 1.5KE package, designed for primary-side overvoltage protection of sensitive electronics. It features a 8.5 V stand-off voltage (VWM), 9.44–10.4 V breakdown voltage (VBR), 14.4 V clamping voltage at 50 A peak pulse current (IPP), and 1500 W peak pulse power (10/1000 µs waveform). It is used to protect MOSFETs, ICs, and sensor signal lines against inductive switching transients and lightning surges in industrial and telecom equipment.
For engineers reviewing the LCE8.5A-E3/54 datasheet, LCE8.5A-E3/54 pinout, LCE8.5A-E3/54 application, or LCE8.5A-E3/54 equivalent, key selection criteria include clamping voltage margin relative to protected device's absolute maximum rating, IPP capability under system-level surge test conditions (IEC 61000-4-5), and thermal derating behavior above 25 °C ambient.
Technical Context
The LCE8.5A-E3/54 operates as a unidirectional avalanche diode with glass-passivated junction, enabling fast response (<1 ns) to transient events and low incremental surge resistance for stable clamping performance. Its 1.5KE case style supports lead-free soldering per J-STD-002 and withstands 275 °C for 10 s per JESD 22-B106.
It is rated for -65 °C to +175 °C operating junction temperature, with 6.5 W steady-state power dissipation on an infinite heatsink at TL = 75 °C. The color band denotes cathode polarity, and its UL 497B listing confirms suitability for telecom line protection applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - Maximum continuous reverse working voltage before conduction begins; sets upper limit for normal circuit operation. |
| VBR (min/max) | 9.44 V / 10.4 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during overvoltage events. |
| VC @ IPP | 14.4 V at 50 A - Clamped voltage during 10/1000 µs surge; defines worst-case stress on downstream components. |
| PPPM | 1500 W - Peak pulse power handling capacity; validates robustness against IEC 61000-4-5 Level 4 surges. |
| IR @ VWM | 50 µA max - Reverse leakage at stand-off voltage; ensures minimal standby power loss and signal integrity. |
| Junction Temp Range | -65 °C to +175 °C - Enables deployment in harsh environments including industrial motor drives and outdoor telecom cabinets. |
| Package | 1.5KE - Standard axial-leaded DO-201AD outline; compatible with through-hole PCB assembly and manual rework. |
Pinout & Package
Package: 1.5KE (DO-201AD), axial-leaded, molded epoxy body with UL 94 V-0 rating. Matte tin-plated leads, RoHS-compliant (E3 suffix), JESD 201 Class 1A whisker tested. Polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward bias; connected to lower-potential side of protected circuit. | Provides reference path for clamping when transient exceeds VWM; must be routed with low-inductance trace to ground plane. |
| Cathode | Current exit terminal during reverse-bias clamping; marked by color band. | Connected to protected node (e.g., IC supply rail or signal line); determines clamping direction for unidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under repeated surge stress without parameter drift. |
| 1500 W peak pulse power (10/1000 µs) | Supports compliance with IEC 61000-4-5 surge immunity requirements up to 4 kV (line-to-earth) in telecom interfaces. |
| Low clamping ratio (VC/VBR ≈ 1.44) | Minimizes overvoltage overshoot during clamping, reducing risk of latch-up or gate oxide damage in protected MOSFETs and ICs. |
| UL 497B listed | Validates suitability for telecom central office and customer premises equipment without additional certification effort. |
| 100 pF junction capacitance | Enables use on data lines up to ~10 Mbps without significant signal distortion; suitable for RS-485, CAN, and sensor analog outputs. |
Applications
| Industrial Motor Drives | Telecom Line Interface |
|---|---|
Use Scenario: Protection of gate drivers and microcontroller I/O pins from inductive kickback during IGBT/MOSFET switching in variable-frequency drives. IC Role / Device Role / Timing Role: Unidirectional TVS placed between gate driver output and power FET gate, referenced to local ground. Use Value: Limits gate-source voltage to ≤14.4 V during 50 A surge, preventing gate oxide rupture while maintaining <50 µA leakage during normal PWM operation. |
Use Scenario: Primary-side surge suppression on POTS or DSL line interface circuits exposed to lightning-induced transients. IC Role / Device Role / Timing Role: Standoff-rated protector on tip/ring lines upstream of transformer or integrated line codec. Use Value: Clamps 4 kV/2 kA combination wave to <15 V within <1 ns, meeting GR-1089-CORE and ITU-T K.21 requirements for Class B equipment. |
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
Use Scenario: Load-dump and ISO 7637-2 Pulse 5a protection on 12 V power rails feeding BCM microcontrollers and CAN transceivers. IC Role / Device Role / Timing Role: Parallel-connected TVS on main VBAT input, positioned before DC/DC converter input filter. Use Value: Absorbs 1500 W transient energy without failure, maintaining 8.5 V stand-off to avoid false triggering during cold-crank (6.0–7.5 V). |
Use Scenario: Overvoltage safeguard for 4–20 mA current loop transmitters and analog sensor outputs exposed to field wiring faults. IC Role / Device Role / Timing Role: Bidirectional protection implemented using two LCE8.5A-E3/54 devices in series-opposing configuration across signal pair. Use Value: Provides symmetrical ±14.4 V clamping with <100 pF capacitance, preserving loop accuracy and avoiding signal attenuation at 20 kHz bandwidth. |
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 | DO-214AA (SMB) package; 600 W PPPM; 13.4 V VC @ 35.7 A; 100 pF CJ. | Lower power rating limits use to sub-2 kV surge levels; smaller footprint suits space-constrained PCBs. | Select SMBJ8.5A only when board area is constrained and system-level surge requirement is ≤2 kV (IEC 61000-4-5 Level 2). |
| 1.5KE8.5A | Identical electrical specs and 1.5KE package; differs only in branding and packaging code (no E3/54 tape-and-reel designation). | No functional difference; same UL 497B listing and thermal profile. | 1.5KE8.5A is a direct form-fit-function alternative where RoHS compliance and JESD 201 whisker testing are not required. |
Compared with SMBJ8.5A and 1.5KE8.5A, the LCE8.5A-E3/54 offers verified RoHS compliance (E3), JESD 201 Class 1A whisker resistance, and optimized tape-and-reel delivery (54 mm reel, 1400 units) for automated SMT line integration - critical for high-volume industrial manufacturing.
Availability
LCE8.5A-E3/54 is available at Aetrix Electronics and suitable for industrial motor drives, telecom line interfaces, and automotive body control modules requiring stable component supply, consistent parametric performance, and full traceability from wafer lot to shipment.
Supply support for LCE8.5A-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 validation.
The LCE series belongs to Vishay's low-capacitance TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in telecom infrastructure, industrial controls, and automotive subsystems where clamping precision and surge endurance are critical.
FAQ
What is the maximum clamping voltage of the LCE8.5A-E3/54 under standard test conditions?
The LCE8.5A-E3/54 has a maximum clamping voltage (VC) of 14.4 V at 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 worst-case voltage seen by protected circuitry during a standardized surge event. Designers must ensure this clamping level remains below the absolute maximum rating of downstream components. The LCE8.5A-E3/54 maintains this specification across its qualified temperature range.
Is the LCE8.5A-E3/54 suitable for bidirectional transient protection?
No - the LCE8.5A-E3/54 is a unidirectional TVS diode, intended for DC or single-polarity signal line protection. For AC or bidirectional applications such as RS-485 or telephone lines, two LCE8.5A-E3/54 devices must be connected in series-opposing configuration. This arrangement provides symmetrical ±14.4 V clamping while preserving the device's specified 100 pF junction capacitance and 50 µA leakage at 8.5 V. The LCE8.5A-E3/54 itself does not support reverse conduction.
What is the meaning of the "E3/54" suffix in LCE8.5A-E3/54?
The "E3" suffix indicates RoHS-compliant matte tin plating and JESD 201 Class 1A whisker resistance; "54" specifies the preferred package code for 13-inch diameter paper tape and reel, with a base quantity of 1400 units. This packaging format enables direct use in automated pick-and-place systems. The LCE8.5A-E3/54 is not functionally different from non-E3 variants but meets stricter process and environmental requirements required by many industrial and telecom OEMs.
How does the LCE8.5A-E3/54 perform at elevated ambient temperatures?
The LCE8.5A-E3/54 follows Vishay's standard derating curve: its peak pulse power capability decreases linearly above 25 °C ambient, reaching ~50 % of 1500 W at 100 °C case temperature. Steady-state power dissipation is limited to 6.5 W on an infinite heatsink at TL = 75 °C. Designers must consult Figure 2 in document 88357 to apply correct thermal derating for their specific layout and airflow conditions when using the LCE8.5A-E3/54 in enclosed enclosures or high-temperature environments.
Does the LCE8.5A-E3/54 require external heat sinking for typical surge duty cycles?
No - the LCE8.5A-E3/54 is designed for transient-only operation and does not require heat sinking under standard IEC 61000-4-5 surge conditions (duty cycle ≤ 0.01 %). Its 1.5KE package provides sufficient thermal mass for single-event energy absorption. However, if subjected to repetitive surges exceeding 1 Hz or sustained overvoltage conditions, thermal accumulation may exceed safe junction limits. In such cases, PCB copper pour and thermal vias beneath the cathode/anode pads are recommended to enhance conduction cooling for the LCE8.5A-E3/54.
LCE8.5A-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:
- 14.4V
- Current - Peak Pulse (10/1000µs):
- 100A
- 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
LCE8.5A-E3/54 FAQ
1.How can I place an order for LCE8.5A-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for LCE8.5A-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 LCE8.5A-E3/54 reliable?
The price and inventory of LCE8.5A-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 LCE8.5A-E3/54 is usually 5 days.
3.What payment methods are accepted for LCE8.5A-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LCE8.5A-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LCE8.5A-E3/54?
LCE8.5A-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LCE8.5A-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 LCE8.5A-E3/54?
For technical support, including LCE8.5A-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LCE8.5A-E3/54 requirements.
6.How does Aetrix verify that LCE8.5A-E3/54 is sourced from the original manufacturer or authorized distributors?
All LCE8.5A-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 LCE8.5A-E3/54 meets industry standards.
7.What is the process for return or replacement of LCE8.5A-E3/54?
All LCE8.5A-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with LCE8.5A-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 LCE8.5A-E3/54 part is unused and in its original packaging.
Return procedure for LCE8.5A-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LCE8.5A-E3/54 Tags
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