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DS-C48S-300AC
Cisco DS-C48S-300AC 300W AC Hot-Swap Power Supply for MDS 91...
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DS-C48S-300AC is a 300W AC internal hot-swap power supply for MDS 9148S switches. The MDS 9148S chassis runs with dual redundant supplies, and one healthy supply keeps the switch operating after a single supply failure. Cisco service ends on August 31, 2028. The Cisco MDS 9148S power supply fits MDS 9148S 12-port and 48-port switch configurations. The switch supports 48 16-Gbps Fibre Channel ports. Each switch uses two AC modules, INPUT OK and OUTPUT OK LEDs, and fixed supply fans. Back-to-front airflow exhausts toward the Fibre Channel ports, so the rack path must match the chassis. DS-C50I-300AC is the 300W AC module for MDS 9250i, not the MDS 9148S bay.
DS-C48S-300AC price for new stock is is available on request. Get immediate quote. DS-C48S-300AC refurb price is $110.53.
Request bulk order quote for DS-C48S-300AC for additional pricing. Browse the full Cisco MDS 9000 Power Supplies series or explore all Cisco products.
12V +/- 6% up to 25A output feeds the MDS 9148S internal power plane, so the replacement supply must match the 300W bay rating. 90-264V AC input covers low-line and high-line circuits, and 50-60 Hz service is accepted. 4.7A at 85V AC, 3.6A at 110V AC and 1.8A at 220V AC set the branch-circuit check before the PO. 20 ms hold-up time when input is above 100V AC gives the line sag window. The IEC 60320 C16 inlet uses a notched C15 cord connector; CAB-C15-CBN is the C14-to-C15 cabinet jumper. DS-C48S-300AC includes a fixed fan, front-panel status reporting, 0°C to 40°C operating temperature, and back-to-front system airflow. Regional cords carry 10A, 13A or 15A ratings, and the cabinet jumper carries 13A at 250V AC. Safety and EMC approvals include UL 60950, EN 60950 and FCC Part 15 Class A.
DS-C48S-300AC is available new sealed or certified refurbished. Certified refurbished units are inspected and bench-tested on a load tester or in a compatible host; housing, latch and connector pins are inspected, powers on, output holds rated voltage under load, status LEDs report normal, and hot insertion and removal are verified in a live host. Order the condition that matches the chassis service plan. New units carry up to a 3-year extended warranty, certified refurbished units carry up to 1 year, and 30-day returns apply. UK, EU, US and MEA stock supports RMA with advance replacement; PO accepted and Net-30 for government.
| Key Specs | Key Spec Values |
|---|---|
Rated Output | 300W |
Input | AC, 90-264V AC, IEC 60320 C16 |
Fits | MDS 9148S |
Hot-Swap | Hot-swap with redundant pair |
Airflow | Back-to-Front |
Hold-Up Time | 20 ms above 100V AC |
A failed MDS 9148S supply with DS-C48S-300AC on the label needs the same 300W AC module. The chassis has two power bays and can run on one healthy supply after a single failure. Before the PO, confirm DS-C9148S-12PK9, DS-C9148S-48PK9 or another MDS 9148S host PID on the chassis label.
An MDS 9148S with one missing supply needs a second DS-C48S-300AC to return to the supported two-supply configuration. Both fan modules must also be installed and working. Check the INPUT OK and OUTPUT OK LEDs after insertion, then keep the removed unit for failure analysis.
A spares pool for MDS 9148S SAN switches needs DS-C48S-300AC= for replacement stock and regional cords for each site. Cisco sales ended on August 15, 2023, but service runs until August 31, 2028. Before the PO, match the C15 cord set to the PDU outlet.
MDS 9250i switches
DS-C48S-300AC fits MDS 9148S. MDS 9250i takes DS-C50I-300AC, a separate 300W AC power supply for that power bay instead.
-48V DC sites
DS-C48S-300AC accepts AC input only. MDS 9148S accepts only AC power supplies, so no -48V DC supply fits that chassis.
MDS 9148V intake bays
DS-C48S-300AC does not fit MDS 9148V. MDS 9148V uses 500W AC power supplies; order DS-CAC-500W-I for port-side intake bays.
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| DS-C48S-300AC |  CAB-3KX-AC-JP |  PWR-C2-250WAC |  PWR-4330-AC |  CP-PWR-CORD-JP | |
|---|---|---|---|---|---|
| Form Factor | Internal Module | ATX | Internal Module | Internal Module | ATX |
| Hot-Swap Capable | Hot-Swap | No | Hot-Swap | Non-Hot-Swap | No |
| Operating Temperature | 0°C to 40°C | 50°C | -5°C to 45°C | 0°C to 40°C | 50°C |
| Wattage | 300W | 850W | 250W | 250W | 650W |
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DS-C48S-300AC is the MDS 9148S AC Power Supply. It is the 300W AC power module for the Cisco MDS 9148S switch, and DS-C48S-300AC= is the spare form. The base PID follows the supply lifecycle for sales and service dates. Order the spare form for replacement stock.
DS-C48S-300AC fits MDS 9148S switches. The MDS 9148S accepts only AC power supplies, and each chassis uses two 300W modules. MDS 9250i is a different host class for this part search; MDS 9250i takes DS-C50I-300AC instead. Check the chassis label before the PO.
The Cisco MDS 9148S uses DS-C48S-300AC power supplies. Each switch uses two 300W AC modules, and each power supply has INPUT OK and OUTPUT OK LEDs. DS-C48S-FAN= is the fan tray spare for the same chassis, not a power supply.
DS-C48S-300AC is rated at 300W with 90-264V AC input and 50-60 Hz frequency. Output is 12V +/- 6% up to 25A, and hold-up time is 20 ms when input is above 100V AC. The module uses C15-to-C16 cord mating.
Yes, DS-C48S-300AC is hot-swappable in an MDS 9148S switch. Power supplies can be individually replaced without system disruption, and one healthy supply keeps the switch operating after a single supply failure. Restore the second supply to regain redundancy. The front power supply LED reports status.
DS-C48S-300AC uses AC input from 90-264V AC. Max input current is 4.7A at 85V AC, 3.6A at 110V AC and 1.8A at 220V AC. North American 300W deployments require a 20A branch circuit. Use separate branch circuits for each supply.
DS-C48S-300AC uses a notched C15 cord connector that mates to the C16 plug on the power supply. CAB-9K12A-NA is the North America cord form, and CAB-C15-CBN is the C14-to-C15 cabinet jumper option for C13 PDU outlets.
Yes, an MDS 9148S should run with two DS-C48S-300AC power supplies installed. The switch is supported with both power supplies, both fan modules and all fans working. A single healthy supply keeps the switch operating after one supply fails.
DS-C48S-300AC runs in the MDS 9148S back-to-front airflow path. Exhaust moves toward the port side, and the system fan assembly moves 200 LFM through the chassis. Keep 6.4 cm at vents and 15.2 cm between adjacent chassis.
The difference between DS-C48S-300AC and DS-C50I-300AC is host support. DS-C48S-300AC fits MDS 9148S switches, while DS-C50I-300AC fits MDS 9250i switches. Both are 300W AC supplies. Choose the PID on the failed module label and the chassis model label.
Cisco stopped selling DS-C48S-300AC on August 15, 2023. Cisco service ends on August 31, 2028, and no migration product is named for the supply. MDS 9148S switch PIDs ended sale on August 15, 2023 and stay supported until August 31, 2028.
ORM offers DS-C48S-300AC new sealed or certified refurbished. New units carry up to a 3-year extended warranty, certified refurbished units carry up to 1 year, and 30-day returns apply. Cisco service ends August 31, 2028, so plan spares before that date.
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