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1.3 Power Requirements
C141-E050-02EN 1-7
(3) Current Requirements and Power Dissipation
Table 1.4 lists the current and power dissipation.
Table 1.4 Current and power dissipation
Typical RMS Current
Typical Power (*3)
MHC Series
MHD Series
MHC Series
MHD 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)
420 mA
430 mA
2.1 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
— —
0.0002 W/MB
0.0003 W/MB
*1 Current at starting spindle motor.
*2 Power requirements reflect nominal values for +5V power.
*3 At 30% disk accessing.
(4) Current fluctuation (Typ.) at +5V when power is turned on
Figure 1.1 Current fluctuation (Typ.) at +5V when power is turned on