UMA 0204

•Production is strictly controlled and follows an extensive set of instructions established for reproducibility. A homogeneous film of metal alloy is deposited on a high grade ceramic body (85 % Al 2 O 3 ) and conditioned to achieve the desired temperature stability. Nickel plated steel terminations are firmly pressed on the metallised rods. A special laser is used to achieve the target value by smoothly cutting in the resistive layer without damaging the ceramics. A further conditioning is applied in order to stabilise the trimming result.

The resistor elements are covered by a protective coating designed for electrical, mechanical and climatic protection. The terminations receive a final pure tin on nickel plating. Five colour rings designate the resistance value and tolerance in accordance with IEC 60062 . Additional colour dots near the fourth ring are used to identify the temperature coefficient. The result of the determined production is verified by an extensive testing procedure under strict temperature control, performed on 100 % of the individual resistors. Only accepted products are laid directly into the antistatic blister tape in accordance with IEC 60286-3 .