Thick Film Resistor Networks

The Established Reliability, surface-mount chip resistor networks qualified to MIL-PRF-914 (revision G, amendment 3) have increased in availability. These resistor networks are designed for use in mission critical applications such as manned space flight, life support systems, human-implantable medical devices, and prolonged periods in satellite communications.

The networks are available in two JEDEC QPL style sizes. RNS030 (/03) measures .30 x .30 x .050 and has a power rating of 800mW. RNS040 (/04) measures .350 x .350 x .050 and has a power rating of 1W. Also offered is a SLAMDIP QPL style network resistor, RNS050 (/05), which measures .410 x .150 x .030 and has a power rating of 800 mW. All three styles have a temperature characteristic of 300ppm (Product Level M) or 100ppm (Product Level K), and a maximum power rating of 50 volts.

The Mil-914 networks are available with standard resistance values from 10 ohms to 2.2M ohms and standard tolerances of 10%, 5%, 2%, and 1%. Network termination consists of a high-adhesion conductive base layer covered by a nickel barrier to prevent solder joint degradation. The outer finish is fused 60/40 tin/lead solder.

The resistors are available in two product level categories, determined by the extent of product testing. Level "M" is an Established Reliability product that requires ongoing life tests with failure rates established at 1% per 1000 hours. All Level "M" parts have a 100-hour power conditioning test applied to them. These networks are tested for use in extreme environmental conditions. The operating temperature range for the resistors is –55 to +125. Level "C" is a Non-Established Reliability product manufactured with the same design and process as the Level M product, but not subjected to the same degree of mandatory testing.

State Of The Art, Inc., 2470 Fox Hill Rd, State College, PA 16803-1797. Tel: 814-3558004; Fax: 814-355-2714.