Vishay General Semiconductor - Diodes Division 1.5KE6.8CHE3/54

Overview

1.5KE6.8CHE3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary-side overvoltage protection in DC power rails and signal lines. It features a 6.45 V to 7.14 V breakdown voltage (V_BR) at 10 mA, 5.80 V maximum standoff voltage (V_WM), 1000 µA maximum reverse leakage at V_WM, 1500 W peak pulse power (10/1000 µs), and clamps transients to ≤10.5 V at 143 A peak pulse current - used in automotive body control modules, industrial PLC I/O protection, and AC-DC adapter input stages.

For engineers reviewing the 1.5KE6.8CHE3/54 datasheet, 1.5KE6.8CHE3/54 pinout, 1.5KE6.8CHE3/54 application, or 1.5KE6.8CHE3/54 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, thermal derating behavior, AEC-Q101 qualification status (HE3 variant), and direct alternatives with documented clamping and polarity differences - all confirmed from Vishay Document #88301 (Rev. 09-Aug-2022).

Technical Context

This device operates as a silicon avalanche diode with glass-passivated junction, optimized for fast transient suppression (<1 ns response) under 10/1000 µs surge waveforms. Its unidirectional polarity uses a cathode band marking, and it complies with JESD22-B106 (275 °C solder dip) and JESD201 Class 1A whisker testing (E3 suffix).

Thermal performance is defined by R_θJA = 75 °C/W and R_θJL = 15.4 °C/W, enabling reliable operation up to T_J = 175 °C. The 1.5KE6.8CHE3/54 is rated for 200 A non-repetitive forward surge (8.3 ms half-sine) and exhibits a +0.057 %/°C temperature coefficient of V_BR.

Key Specifications

Pinout & Package

Package: JEDEC DO-201AD (Case Style 1.5KE), axial-leaded, molded epoxy body with matte tin-plated leads. Cathode identified by color band on case.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient suppression applications.

Compared with 1.5KE6.8CHE3/54, SMBJ6.8A-E3/52 trades peak power and leaded robustness for compactness, while 1.5KE6.8A-E3/54 retains identical electrical performance but omits AEC-Q101 validation - making the HE3 variant essential for automotive deployment where process and lifetime traceability are required.

Availability

1.5KE6.8CHE3/54 is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and telecom infrastructure requiring stable component supply with AEC-Q101 compliance and traceable sourcing.

Supply support for 1.5KE6.8CHE3/54 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 designs and manufactures discrete semiconductors including diodes, MOSFETs, and TVS devices, with global manufacturing and testing facilities focused on high-reliability passive and protective components.

The 1.5KE series was developed specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness, consistency, and regulatory qualification (AEC-Q101, UL) are mandatory.

FAQ

What is the breakdown voltage tolerance for 1.5KE6.8CHE3/54?

The 1.5KE6.8CHE3/54 has a specified breakdown voltage range of 6.45 V to 7.14 V at 10 mA test current, corresponding to ±5% tolerance around the nominal 6.8 V rating. This tight V_BR window ensures predictable clamping onset across production lots and temperature ranges, critical for protecting 5 V and 3.3 V logic interfaces in automotive and industrial systems where 1.5KE6.8CHE3/54 is deployed.

Is 1.5KE6.8CHE3/54 bidirectional or unidirectional?

The 1.5KE6.8CHE3/54 is a unidirectional TVS diode, indicated by the absence of "C" in its part number (e.g., 1.5KE6.8CA would be bidirectional). It features a cathode band marking and conducts only in forward bias, clamping reverse transients above V_BR. This polarity configuration makes 1.5KE6.8CHE3/54 appropriate for DC rail protection where ground-referenced surges dominate, unlike AC-coupled or differential-line applications requiring bidirectional variants.

Does 1.5KE6.8CHE3/54 meet AEC-Q101 qualification?

Yes, the "HE3" suffix in 1.5KE6.8CHE3/54 explicitly denotes AEC-Q101 qualification per Vishay Document #88301 (Rev. 09-Aug-2022), covering stress tests including HTGB, HTRB, TCT, and ESD. This qualification validates 1.5KE6.8CHE3/54 for automotive powertrain and chassis applications where zero-defect reliability and extended temperature operation (–55 °C to +175 °C) are required - distinguishing it from commercial-grade variants like 1.5KE6.8A-E3/54.

What is the maximum clamping voltage of 1.5KE6.8CHE3/54 at rated surge current?

The 1.5KE6.8CHE3/54 clamps to a maximum of 10.5 V at its rated peak pulse current of 143 A (10/1000 µs waveform), as specified in Vishay's electrical characteristics table. This low V_C ensures protected circuits - such as 12 V automotive ECUs or 5 V industrial sensors - remain below absolute maximum ratings during worst-case transients, directly enabling robust system-level EMC compliance when 1.5KE6.8CHE3/54 is applied per layout best practices.

What package type does 1.5KE6.8CHE3/54 use, and what are its key mechanical properties?

The 1.5KE6.8CHE3/54 uses the JEDEC DO-201AD package (Case Style 1.5KE), an axial-leaded, epoxy-molded construction with UL 94 V-0 flammability rating. Its leads are matte tin-plated and solderable per J-STD-002/JESD 22-B102, rated for 275 °C solder dip (10 s max). The 1.5KE6.8CHE3/54 package supports high-power dissipation via lead-to-board thermal conduction, with R_θJL = 15.4 °C/W - critical for sustained surge handling in confined enclosures where 1.5KE6.8CHE3/54 is commonly installed.