Seagate ST9500622NS, ST9500621NS, ST9500620NS, ST9250612NS ST9250610NS Parameter 0GB Voltage +12

250GB drive (Standard & SED model) DC power requirements

	ST9250610NS				ST9250610NS
Parameter		(3.0GB)					(6.0GB)
Voltage	+5 V	+12 V	Power	+5 V			+12 V	Power
Regulation	+10/-7.5%		(watts)	+10/-7.5%				(watts)
Average Idle Current	0.27	0.10	2.48	0.27		0.10		2.52
Advanced Idle Current
Idle1	0.22	0.09	2.24	0.23		0.09		2.29
Idle2	0.15	0.08	1.74	0.16		0.08		1.79
Idle3	0.15	0.07	1.55	0.16		0.07		1.59
Standby	0.13	0.04	1.15	0.14		0.04		1.20
Average Sleep Current	0.14	0.04	1.15	0.15		0.04		1.20
Maximum Start Current:
DC (Peak DC)	0.47	0.78	11.69	0.48		0.78		11.71
AC (Peak AC)	0.72	1.15	17.37	0.70		1.15		17.26
Delayed Motor Start (DC max)	0.14	0.04	1.18	0.15		0.04		1.23
Peak Operating Current (random read):
Typical DC	0.27	0.24	4.29	0.28		0.25		4.35
Maximum DC	0.27	0.25	4.33	0.28		0.25		4.39
Maximum DC (peak)	0.98	0.82	14.74	0.98		0.82		14.74
Peak Operating Current (random write):
Typical DC	0.36	0.20	4.14	0.37		0.20		4.19
Maximum DC	0.36	0.21	4.29	0.37		0.21		4.32
Maximum DC (peak)	0.90	0.82	14.34	0.90		0.82		14.34
Peak operating current (sequential read):
Typical DC	0.58	0.11	4.22	0.59		0.11		4.28
Maximum DC	0.60	0.11	4.31	0.61		0.11		4.36
Maximum DC (peak)	0.86	0.24	7.18	0.80		0.26		7.12
Peak operating current (sequential write):
Typical DC	0.73	0.11	4.98	0.74		0.11		5.03
Maximum DC	0.74	0.11	5.03	0.75		0.11		5.09
Maximum DC (peak)	0.90	0.24	7.38	0.94		0.26		7.82

*During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and power to operational levels.

12 Constellation.2 Serial ATA Product Manual, Rev. B