R5220K121A-TR,400MA PWM STEP-DOWN DCDC CONVERT
R5220K121B-TR,400MA PWM STEP-DOWN DCDC CONVERT
R5220K131A-TR,400MA PWM STEP-DOWN DCDC CONVERT
R5220K151A-TR,400MA PWM STEP-DOWN DCDC CONVERT
R5220K181A-TR,400MA PWM STEP-DOWN DCDC CONVERT
R5220K221A-TR,400MA PWM STEP-DOWN DCDC CONVERT
R5220K231A-TR,400MA PWM STEP-DOWN DCDC CONVERT
R5220K251A-TR,400MA PWM STEP-DOWN DCDC CONVERT