2CSF204001R3800 is an ABB contactor that can be used to control loads in a low voltage circuit. It is designed for three-pole, AC-3 applications and is suitable for use with AC or DC coils. The contactor has an insulation voltage of up to 1000 V, a rated operating current of 40 A and an ambient temperature range of -25°C to +55°C. In addition, it is certified to UL, IEC, EN, and CSA standards and is RoHS compliant. The contactor also features a unique design for maximum performance, reliability, and longevity.