The datasheet provides detailed information about Microsemi’s 1500 Watt Unidirectional and Bidirectional Transient Voltage Suppressors (TVS), part of the ML.SKE series. These devices, which include models from ML.SKE6.8A to ML.SKE400CA(e3), are designed to shield sensitive electronic components from voltage spikes and transients due to lightning, electrostatic discharge (ESD), electrical fast transients (EFT), inductive switching, and radio-frequency interference (RFI).
Key Features
The datasheet highlights several key features of these TVS devices such as their high reliability, with the fabrication and assembly lot traceability, economical plastic encapsulated build for through-hole mounting, and various rigorous screening options according to MIL-PRF-19500 standards. The suppressors can handle surges up to 1500 watts (10/1000 µs pulse). Furthermore, they are available in RoHS compliant versions and possess a moisture classification of “Level 1”, indicating no need for a dry pack per IPC/JEDEC J-STD-020B.
Applications and Benefits
The series of TVS devices are suitable for high-reliability applications where they offer protection from switching and RFI-induced transients. They comply with IEC standards for ESD and EFT protection and come in different classes for secondary lightning protection, with class levels indicating their capability at various source impedances.
Maximum Ratings and Mechanical Packaging
Ratings describe operation within junction and storage temperatures from -65 to +150°C, with thermal resistance parameters specified for both junction-to-lead and junction-to-ambient scenarios. Additionally, the devices have a peak pulse power rating of 1500W at 25°C with thermal resistance junction to lead and junction to ambient specified respectively.
The mechanical packaging section outlines the construction of the TVS devices, including their epoxy body that meets UL94V-0, and their terminals which come in tin-lead or RoHS compliant matte-tin plating. The marking, polarity, tape & reel options, and weight of the devices are also explained.
Part Nomenclature
A breakdown of the part nomenclature clarifies how to interpret the Microsemi part numbers, indicating the reliability level, RoHS compliance, tolerance level, polarity, peak pulse power, kilowatt rating, encapsulated plastic package, and nominal breakdown voltage.
Contact Information
Further assistance and detailed product specifications can be sought from Microsemi Corporation, with contact details provided for their Lawrence MA, and Co. Clare, Ireland offices.
References:
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