The Littelfuse High Reliability Varistor datasheet offers detailed information on varistor products that are designed for applications requiring rigorous quality and reliability standards. These standards include military guidelines, such as MIL-STD-19500, MIL-STD-750, Method 202, and more. High Reliability Varistors by Littelfuse are an optimal solution in conditions where radiation hardness is a significant factor.
Product Series and Certifications
The datasheet showcases the ZA Series, which is subdivided into several categories:
- DSSC Qualified Parts List (QPL) MIL-R-83530: Includes four currently available items that are screened and meet the rigorous MIL-R-83530 standard.
- High Reliability Series TX Equivalents: Comprises 29 available items that provide equivalent solutions.
- Products designed to custom specifications (SCD) or following Standard Military Flows.
Additionally, these varistors have received numerous approvals and certifications including DSSC Approved QPL Listing, CECC Certification, ISO Approval, UL Recognition, and CSA Certification, ensuring their credibility and quality.
Performance Characteristics and Inspection Criteria
The MIL-R-83530/1 Ratings and Characteristics table offers detailed parameters such as voltage ratings, clamping voltage, varistor voltage tolerance, and energy ratings for varistor models like M83530/1-2000B and M83530/1-2200D, among others. It also lists the nearest commercial equivalents for these high-reliability varistors.
Inspection standards are stringent, featuring three groups – A, B, and C – each focusing on different sets of criteria:
- Group A: Includes 100% testing for high-temperature life, thermal shock, power burn-in, clamping voltage, and varistor voltage, among other specifications. A Visual and Mechanical Examination is also part of this group, with an Acceptable Quality Level (AQL) indicating the percentage of major and minor defects allowed.
- Group B: Focuses on evaluations including dielectric withstanding voltage, resistance to solvents, and terminal strength.
- Group C: Encompasses periodic inspections every three months, assessing high-temperature storage, operating life, pulse life, as well as shock, vibration, and constant acceleration energy tolerance.
Additional Information
The datasheet also references Commercial Item Descriptors (CID) such as CID AA-55564-3 for government use, facilitating component identification for procurement.
It is important to note that specifications are subject to change without notice, and the document bears a revision date of September 03, 2014.
References:
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