Catalyst 4500X 750W AC front to back cooling 2nd power supply C4KX-PWR-750DC-R

SKU: 12027 Category:


C4KX-PWR-750DC-R Overview

There are two versions of the 750 W DC-input power supply, the C4KX-PWR-750DC-F power supply which has back-to-front airflow (the release lever is color-coded blue indicating cool side) and the C4KX-PWR-750DC-R power supply which has front-to-back airflow (the release lever is color-coded burgundy indicating warm side). Both power supplies provide 750 W of power. Figure 1 shows the DC-input power supply and identifies the major features.

Figure 1 750 W DC-Input Power Supply Features


1 Source DC cable plug (detachable) 5 FAIL LED (amber)
2 Power supply handle 6 OK LED (green)
3 DC power cable retaining strap (velcro) 7 Retention latch clip
4 Release lever (color-coded for airflow direction. Burgundy indicates front-to-back; blue indicates back-to-front)

DC-Input Power Supply Status LEDs Meanings 

OK LED (Green) FAIL LED (Amber) Description
Off Off No source DC power detected by the power supply.
Off On Power supply failure (includes overvoltage, overcurrent, overtemperature, or fan failure).
Off Blinking Power supply warning situation where the power supply continues to operate (possible scenarios include high temperature, high power, or slow fan).
Blinking Off Source DC is present. The 3.3 VDCsb (standby) is on. The power supply is off.
On Off Power supply is ON and is functioning normally.
C4KX-PWR-750DC-R Datasheet
Item C4KX-PWR-750DC-R
DC-input voltage

North America: -48 VDC (nominal) (-40.5 VDC to -56 VDC)

International: -60 VDC (nominal) (-55 VDC to -72 VDC)

DC-input current 25 A
Power supply output capacity 750 W
Power supply output

62 A @ 12 VDC

3 A @ 3.3 VDC

Output holdup time 16 ms minimum (20 ms @ 60% load)
DC-input power supply dimensions
(H x W x D)
1.57 x 2.15 x 14.28 in
(3.99 x 5.46 x 36.27 cm)
Weight 2 lb (0.91 kg)
Shipping box dimensions, spare power supply
(H x W x D)
4.38 x 7.13 x 20.13 in
(11.13 x 18.11 x 51.13 cm)
Shipping weight 3.7 lb (1.68 kg)

Additional information

Weight 0.9100 kg
Dimensions 36.2700 × 5.4600 × 3.9900 cm


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