The high reliability Littelfuse varistor is the latest step in increased product performance, and is available for applications requiring quality and reliability assurance levels consistent with military or other standards. (MIL-STD-19500, MIL-S-750, Method 202.) Additionally, Littelfuse varistors are inherently radiation hardened compared to silicon diode suppressors as illustrated in Figure 1. This series of high-reliability varistors involve five categories: DSSC Qualified Parts List (QPL) MIL-R-83530 4 Types Presently Available DSSC Standard Military Drawings Based on MIL-R 83530 63 Types Presently Available: ZA Series- Drawing # 87063 DB Series- Drawing # 90065 Littelfuse High Reliability Series Offers TX Equivalents 29 Types Presently Available Custom Types Processed to Customer-Specific Requirements –(SCD) or to Standard Military Flow