RER55F4990RC02

Operating Temperature:	-55°C ~ 250°C
Failure Rate:	R (0.01%)
Package / Case:	Axial, Box
Lead Style:	Solder Lugs
Height - Seated (Max):	0.625" (15.87mm)
Size / Dimension:	1.968" L x 1.140" W (49.99mm x 28.96mm)
Mounting Feature:	Flanges
Coating, Housing Type:	Aluminum
Features:	Military, Moisture Resistant, Non-Inductive
Series:	Military, MIL-PRF-39009, RER55
Temperature Coefficient:	±20ppm/°C
Composition:	Wirewound
Power (Watts):	30W
Tolerance:	±1%
Resistance:	499 Ohms
Part Status:	Active
Packaging:	Bulk

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RER55F4990RC02 application field and working principleChassis mount resistors are components comprising a resistor which is housed within an insulated body which is usually attached directly onto a circuit board or a device chassis. Chassis mount resistors are more resistant to electromagnetic interference and vibration than other types of resistors.The RER55F4990RC02 is an aluminum-housed Front Panel Meter (FPM) chassis mount resistor which combines traditional resistors and a display gauge. It is designed as a highly efficient, small-size, high-performance resistor, intended as a replacement for adjustable single-turn wire-wound resistors. Its application field includes power supplies, amplifiers, generators, electronic communications, and audio/visual equipment.The RER55F4990RC02 features a unique display gauge scale, and is able to display a value as small as 0.00Ω and as high as 9.99Ω. The scale display is clearly visible, and allows for easy setting and tuning, even under conditions of low ambient lighting.The working principle of the RER55F4990RC02 involves the adjustment of a control circuit (comprising two coils) within its housing. When the resistance value of the resistor is changed, this causes the control circuit to adjust the two coils, which in turn regulates the LED display to show the resistance value.The RER55F4990RC02 has a number of features which make it an ideal choice of chassis mount resistor. It has a low temperature coefficient, meaning it can function reliably and accurately even when exposed to extreme temperatures. Its solid construction and aluminum housing offers superior mechanical strength and environmental resistance, and its compact size makes the RER55F4990RC02 suitable for use in tight spaces or even within a handheld device.Overall, the RER55F4990RC02 is a small and efficient chassis mount resistor designed for use in a range of applications. It is capable of accurately and reliably displaying resistance values, and is made from a strong and environmentally durable aluminum housing. All these features, combined with its reliable working principle, make the RER55F4990RC02 an ideal choice for any electronic application.

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