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1.3 Power Requirements
C141-E192-01EN
1-7
(4) Current Requirements and Power Dissipation
Table 1.3 lists the current and power dissipation (typical).
Table 1.3 Current and power dissipation
Typical RMS Current Typical Power (*3)
MHT Series MHT Series
Spin up (*1) 0.9 A 4.5 W
Idle 130 mA 0.65 W
R/W (on track) (*2) Read 400 mA / Write 420mA Read 2.0 W / Write 2.1 W
Seek (*5) 460 mA 2.3 W
Standby 50 mA 0.25 W
Sleep 20 mA 0.1 W
Energy
Efficiency (*4)
— 0.008 W/GB
(rank E / MHT2080AT)
0.011 W/GB
(rank E / MHT2060AT)
0.011 W/GB
(rank E / MHT2040AT)
0.022 W/GB
(rank D / MHT2030AT)
0.022 W/GB
(rank D / MHT2020AT)
*1 Current at starting spindle motor.
*2 Current and power level when the operation (command) that accompanies a
transfer of 63 sectors is executed 3 times in 100 ms
*3 Power requirements reflect nominal values for +5 V power.
*4 Energy efficiency based on the Law concerning the Rational Use of Energy
indicates the value obtained by dividing power consumption by the storage
capacity. (Japan only)
*5 The seek average current is specified based on three operations per 100
msec.
(5) Current fluctuation (Typ.) at +5 V when power is turned on