Seagate ST39140N/W/WC/LW/LC manual DC power requirements Amps for LW/LC, Models ST39140 ST34520

Medalist Pro Installation Guide, Rev. B						19
Table 2b. DC power requirements (Amps) for LW/LC
	models
			ST39140		ST34520
			LW/LC		LW/LC
Voltage			+5V	+12V	+5V	+12V
Regulation [5]			±5%	±5%[2]	±5%	±5%[2]
Max. operating
current DC [1]			0.81	2.4	0.81	2.4
Avg. idle current
	[1]		0.53	0.90	0.53	0.90
DCX
Max. starting
current
(peak DC) DC [3]				2.5		2.5
(peak AC) AC [3]				N/A		N/A
Delayed motor
start (max)
DC [1][4]			0.51	0.16	0.51	0.16
Peak operating
current
Typical DCX		[1][6]	0.58	1.0	0.58	1.0
Maximum DC [1]			0.81	1.53	0.81	1.37

Notes for Tables 2a and 2b.

[1]Measured with an average reading DC ammeter. Instanta- neous +12V current peaks will exceed these values.

[2]A –10% droop is permissible during initial start of the spindle but must return to ±5% before reaching 7,200 RPM. The