Alpha Electronics Corp.【Metal Foil Resistors】

A metal foil resistor, unlike a precision-class metal film resistor or wire-would resistor, is an ultra-precision in which the primary resistance element is a special alloy foil several μm thickness.
Use of this metal foil as the resistance element gives superior performance not found in any other resistors. In particular the temperature coefficient has been reduced to an unprecedented extremely low value by strict quality control of alloy composition and newly developed foil stabilization treatment technology.

(Molded Type)
Temperature Characteristics of Resistance:
0.14ppm/deg.C (Typical)
Tolerance of Resistance value:
+/-0.005%
Long Term Stability:
25ppm/year,50ppm/3 years
(Hermetically-sealed: 5ppm/year, 10ppm/3 years)
Life (Loaded):
0.03%/2000 hours
Thermal EMF:
0.1microvolt/deg.C (between leads)
Noise: -42dB
Voltage Coefficient:
0.1ppm/V
Frequency Characteristics:
Inductance: 0.08micro henry
Capacitance: 0.5picofarad

Evaluation Report issued by NASA (Goddard Space Flight Center)

"Evaluation Report for Fixed, Precision, Metal Foil　Resistors Similar to MIL-R-122/1, Parts Technology Report 61132 & 80819A"

Based on a 1995 NASA (U.S. National Aeronautics and Space Administration) evaluation report with 1998 data supplements, Alpha Electronics' metal foil resistors have been approved for NASA space flight applications. Our metal foil resistors are currently used in GOES weather satellites, MT SAT, and the Cassini Saturn Probe.

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