Seagate ST3450856SS manual ST3300656SS DC power requirements, ST3146356SS DC power requirements

Table 3:	ST3300656SS DC power requirements
				ST3300656SS		ST3300656SS
				1.5 Gbit mode		3 Gbit mode
			Notes	(Amps)	(Amps)	(Amps)	(Amps)
Voltage				+5V	+12V [2]	+5V	+12V [2]
Regulation			[5]	±5%	±5% [2]	±5%	±5% [2]
			[1] [7]	0.56	0.66	0.58	0.69
Avg idle current DCX
Maximum starting current
(peak DC) DC		3σ	[3]	0.74	1.78	0.90	1.80
(peak AC) AC		3σ	[3]	0.86	4.00	1.14	4.31
		3σ
Delayed motor start (max) DC			[1] [4]	0.56	0.03	0.62	0.03
Peak operating current:
			[1][6]	0.60	1.05	0.63	1.07
Typical DCX
Maximum DC		3σ	[1]	0.61	1.07	0.64	1.09
Maximum (peak) DC		3σ		1.12	2.64	1.40	2.74
Table 4:	ST3146356SS DC power requirements
				ST3146356SS		ST3146356SS
				1.5 Gbit mode		3 Gbit mode
			Notes	(Amps)	(Amps)	(Amps)	(Amps)
Voltage				+5V	+12V [2]	+5V	+12V [2]
Regulation			[5]	±5%	±5% [2]	±5%	±5% [2]
			[1] [7]	0.53	0.56	0.55	0.57
Avg idle current DCX
Maximum starting current
(peak DC) DC		3σ	[3]	0.89	1.69	0.88	1.67
(peak AC) AC		3σ	[3]	1.13	3.72	1.14	3.88
		3σ
Delayed motor start (max) DC			[1] [4]	0.56	0.04	0.58	0.04
Peak operating current:
			[1][6]	0.57	0.95	0.60	0.95
Typical DCX
Maximum DC		3σ	[1]	0.58	0.96	0.60	0.96
Maximum (peak) DC		3σ		1.14	2.46	1.16	2.46

[1]Measured with average reading DC ammeter or equivalent sampling scope. Instantaneous +12V current peaks will exceed these values. Power supply at nominal voltage. N (number of drives tested) = 6, 35 Degrees C ambient.

[2]For +12 V, a –10% tolerance is allowed during initial spindle start but must return to ±5% before reaching

24 Cheetah 15K.6 SAS Product Manual, Rev. A