It is a pre-wired auxiliary contact that provides remote information of the circuit breaker status.It is used on Compact NSXm and PowerPact B devices.SD contact indicates that the circuit breaker has tripped.This auxiliary is a common point changeover type contact with 1 normally open contact and 1 normally closed contact.The rated current is 5A and the minimum load is 2mA at 17 VDC. Utilization categories are AC12/AC13/DC12/DC13/DC14.Compact NSXm embeds 2 auxiliary contacts and their presence is visible on the front face through green flags.It complies with IEC 60947-5-1 standard.