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Description
Function and Application
The primary function of this resistor is to precisely limit current flow or dissipate excess energy within a circuit.The 500-ohm resistance value is specific to a particular circuit’s design requirements,likely for a track circuit’s impedance matching or a relay’s fail-safe logic.
Signal Conditioning:In railway signaling,track circuits use a specific resistance to detect the presence of a train on a section of track.The N 400004 resistor could be part of this circuit’s balance.
Circuit Protection:High-power resistors are often used to dissipate energy from voltage surges or to limit current during a short-circuit condition,protecting sensitive electronics.
Relay Logic:It can be used in fail-safe relay circuits where a specific current or voltage drop is required to ensure a relay drops out correctly in a fault condition.
The”ALSTOM”name indicates its use in equipment manufactured by Alstom,a major player in the rail transport sector.The part number,N 400004,is an internal code used for ordering and identification
