Seagate ST33000651SS Constellation ES SAS Product Manual - Page 33

Table 4: 500GB drive (Standard & SED model) DC power requirements 3.0Gb mode 6.0Gb mode Notes (Amps) (Amps) Voltage +5V +12V [4] +5V +12V [4] Regulation [5] ±5% ±5% [2] ±5% ±5% [2] Avg idle current DCX [1] [7] 0.42 0.21 0.43 0.21 Advanced idle current Idle_A 0.41 0.21 0.43 0.21 Idle_B 0.23 0.19 0.24 0.19 Idle_C/ Standby_Y 0.23 0.12 0.24 0.12 Standby_Z 0.22 0.02 0.24 0.02 Maximum starting current (peak DC) DC 3σ [5] 0.55 1.88 0.56 1.89 (peak AC) AC 3σ [5] 0.83 2.42 0.90 2.58 Delayed motor start (max) DC 3σ [1] [6] 0.35 0.03 0.38 0.03 Peak operating current (random read): Typical DCX [1] [6] 0.55 0.42 0.57 0.42 Maximum DC 3σ [1] 0.57 0.44 0.59 0.44 Maximum (peak) DC 3σ 1.13 1.53 1.19 1.53 Peak operating current (random write) Typical DCX 0.61 0.34 0.62 0.34 Maximum DC 3σ 0.63 0.35 0.64 0.35 Maximum (peak) DC 3σ 1.31 1.57 1.31 1.57 Peak operating current (sequential read) Typical DCX 0.96 0.23 0.98 0.23 Maximum DC 3σ 0.98 0.24 1.01 0.24 Maximum (peak) DC 3σ 1.15 0.45 1.23 0.45 Peak operating current (sequential write) Typical DCX 1.05 0.23 1.06 0.23 Maximum DC 3σ 1.07 0.24 1.08 0.24 Maximum (peak) DC 3σ 1.32 0.42 1.34 0.42 [1] Measured with average reading DC ammeter. [2] Instantaneous +12V current peaks will exceed these values. [3] Power supply at nominal voltage. N (number of drives tested) = 6, 35 Degrees C ambient. [4] For +12 V, a -10% tolerance is allowed during initial spindle start but must return to ±5% before reaching 7200 RPM. The ±5% must be maintained after the drive signifies that its power-up sequence has been completed and that the drive is able to accept selection by the host initiator. Constellation ES Series SAS Product Manual, Rev. F 25