1.3 Power Requirements
C141-E057-01EN 1-7
(3) Current Requirements and Power Dissipation
Table 1.5 lists the current and power dissipation.
Table 1.5 Current and power dissipation
Typical RMS Current
Typical Power (*3)
MHE Series
MHF Series
MHE Series
MHF Series
Spin up (*1)
0.9 A
0.9 A
4.5 W
4.5 W
Idle
190 mA
190 mA
0.95 W
0.95 W
R/W (*2)
430 mA
430 mA
2.15 W
2.15 W
Standby
70 mA
70 mA
0.35 W
0.35 W
Sleep
26 mA
26 mA
0.13 W
0.13 W
Energy
Consumption
Efficiency (*4)
— —
0.0001 W/MB
0.0004 W/MB
*1 Current at starting spindle motor.
*2 Power requirements reflect nominal values for +5V power.
*3 At 30% disk accessing.
*4 Energy Consumption Efficiency =
Idle power dissipation / Total record capacity (MB)
(4) Current fluctuation (Typ.) at +5V when power is turned on
Figure 1.1 Current fluctuation (Typ.) at +5V when power is turned on