Hitachi HTS542525K9SA00 - Input Voltage; Table 39: Input Voltage

Deskstar 7K160 Hard Disk Drive Specification
51
7.3.1 Input voltage
1
To avoid damage to the drive electronics, power supply voltage spikes must not exceed specifications.
2
+12V should be applied within 60 seconds after +5V is applied to the drive.
Table 39: Input voltage
Input voltage supply
2
During run and spin up Absolute max spike voltage
1
Supply rise time
+5 V 5 V ± 5% –0.3 to 5.5 V 0 to 5 sec
+12 V 12 V + 10% –8% –0.3 to 15 V 0 to 5 sec