Narrative:

Shortly after being handed off to nyc approach near the sweet intersection going into ewr; ATC cleared us from 7;000 feet to 6;000 feet on a heading of 110. Once the descent began; ATC issued a traffic alert for an aircraft climbing through 5;000 feet on a southwest heading towards us that he was not talking to. I acknowledged the traffic; picked them up visually and stated we may get an alert on this traffic.my first officer (first officer) put his hands on the controls in preparation for flying manually. I then noticed the TCAS target climbing through about 5;300 feet; and within seconds we received a climb RA. The first officer manually took control of the airplane and complied with the RA.after a few blocked transmissions; we were able to advise ATC. Approach then issued a turn to 190 as we leveled around 6;300-6;400 feet. Once cleared of the conflict; we returned to 6;000 feet. The remainder of the approach was uneventful and the were no issues with our cabin crew who were performing their final cabin checks. Our altitudes were about 500-600 feet apart and the lateral distance appeared to be a similar distance.regarding the conflicting traffic; it was a low wing; single engine general aviation aircraft; possibly a cirrus aircraft. The conflict occurred precisely at the 20 mile DME ring of the class B airspace; and the aircraft was climbing as well as turning southbound at the western edge of the class B.

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Original NASA ASRS Text

Title: B737 Captain reported taking evasive action after receiving an RA from a light aircraft on descent into EWR.

Narrative: Shortly after being handed off to NYC Approach near the SWEET Intersection going into EWR; ATC cleared us from 7;000 feet to 6;000 feet on a heading of 110. Once the descent began; ATC issued a traffic alert for an aircraft climbing through 5;000 feet on a southwest heading towards us that he was not talking to. I acknowledged the traffic; picked them up visually and stated we may get an alert on this traffic.My FO (First Officer) put his hands on the controls in preparation for flying manually. I then noticed the TCAS target climbing through about 5;300 feet; and within seconds we received a Climb RA. The FO manually took control of the airplane and complied with the RA.After a few blocked transmissions; we were able to advise ATC. Approach then issued a turn to 190 as we leveled around 6;300-6;400 feet. Once cleared of the conflict; we returned to 6;000 feet. The remainder of the approach was uneventful and the were no issues with our cabin crew who were performing their final cabin checks. Our altitudes were about 500-600 feet apart and the lateral distance appeared to be a similar distance.Regarding the conflicting traffic; it was a low wing; single engine general aviation aircraft; possibly a Cirrus aircraft. The conflict occurred precisely at the 20 mile DME ring of the Class B Airspace; and the aircraft was climbing as well as turning southbound at the western edge of the Class B.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.