FET急問

作為一個新手
我想問下我如果買FET
應該買以下邊隻?THX!!!
http://hk.farnell.com/jsp/search ... p;Ntt=4562&Ntx=

SI4562DY  MOSFET, DUAL, NP, SO-8
Transistor type:MOSFET; Current, Id cont:7.1A; Resistance, Rds on:0.035R; Voltage, Vgs Rds on measurement:2.5V; Case style:SO-8 (SOIC-8); Charge, gate n-channel:25nC; Charge, gate p channel:22nC;  

SI4562DY-T1-E3  MOSFET, NP, REEL 2500
Transistor type:MOSFET; Current, Id cont:7.1A; Resistance, Rds on:0.035R; Voltage, Vgs Rds on measurement:2.5V; Case style:SO-8 (SOIC-8); Charge, gate n-channel:25nC; Charge, gate p channel:22nC; C;

sp8m4啦 ...........................

其實兩隻係一樣......只係个T1-E3......一个係代表个包裝......一个係代表附合歐盟條例既編号 就係咁....

O i see
Thx for your help