This post explains for the MOSFET.
The Part Number is 4N60B, ANP4N60B, SSP4N60B, SSS4N60B.
The function of this semiconductor is 600V, 4A, MOSFET.
Manufacturers : angstrem, Fairchild
Preview images :
This is N-Chanel Power MOSFET. These N-Channel enhancement mode power field effect
transistors are produced using Fairchild’s proprietary, planar, DMOS technology. This advanced technology has been especially tailored to minimize on-state resistance, provide superior switching
performance, and withstand high energy pulse in the avalanche and commutation mode. These devices are well suited for high efficiency switch mode power supplies.
1. Low Qg
2. Low Rdson
3. RoHS compliant
4. Marking : A4N60B P4N60B B4N60B D4N60B I4N60B U4N60B