Cisco Catalyst 3750X Switches - Refurbished, Used, New

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Cisco Catalyst 3750-X switches are stackable Gigabit access switches for campus wiring closets and branch offices, sold in 24- and 48-port data and PoE+ models and in SFP-based aggregation models, with the feature set sold as a LAN Base, IP Base or IP Services version. Each switch has a rear slot for a C3KX network module that supplies the uplinks, two bays for hot-swappable C3KX power supplies, and StackWise Plus ports that join up to nine switches into one logical unit. This collection is the parts that keep a 3750-X stack running: network modules, power supplies, fans, stacking cables, blanks and the notched power cord. NetworkTigers sells Catalyst 3750-X parts refurbished, used and new. Every unit is tested before it ships so it works when it arrives.

Catalyst 3750-X modules, power and stacking

Part	Used for	Shop
C3KX-NM-1G	Network module with 4x 1G SFP uplink ports	C3KX-NM-1G
C3KX-NM-10G	Network module with 10G SFP+ uplinks: run two ports at 10G, or populate the slots with 1G SFPs	C3KX-NM-10G
C3KX-NM-10GT	Network module with 2x 10G RJ45 copper uplinks	C3KX-NM-10GT
C3KX-SM-10G	Service module with 2x 10G SFP+ uplinks that also adds hardware flow monitoring and port encryption	C3KX-SM-10G
C3KX-PWR-350WAC	350W AC power supply for data-only switches	C3KX-PWR-350WAC
C3KX-PWR-715WAC, C3KX-PWR-715WAC/2	715W AC power supply for PoE+ switches, standard and secondary versions	C3KX-PWR-715WAC \| C3KX-PWR-715WAC/2
C3KX-PWR-1100WAC, C3KX-PWR-1100WAC/2	1100W AC power supply for full PoE+ on 48 ports, standard and secondary versions	C3KX-PWR-1100WAC \| C3KX-PWR-1100WAC/2
C3KX-PWR-440WDC	440W DC power supply for telco and DC-plant racks	C3KX-PWR-440WDC
CAB-STACK-50CM, CAB-STACK-1M, CAB-STACK-3M	StackWise Plus stacking cables in 50 cm, 1 m and 3 m lengths	CAB-STACK-50CM \| CAB-STACK-1M \| CAB-STACK-3M
C3KX-FAN-23CFM	Replacement fan module	C3KX-FAN-23CFM
C3KX-PS-BLANK, CAB-3KX-AC	Blank cover for an empty power supply bay, and the notched AC power cord the C3KX supplies require	C3KX-PS-BLANK \| CAB-3KX-AC
Related Catalyst	Newer and neighboring access switch lines	Catalyst 3850 \| Catalyst 3650 \| Catalyst 2960X \| All Catalyst

Which Catalyst 3750-X parts do I need?

Match the power supply to the switch. A data-only 3750-X ships with a 350W supply; a PoE+ switch needs the 715W supply, or the 1100W supply if you want full 30W PoE+ on all 48 ports at once. A second supply in the empty bay gives you redundancy and, with StackPower cables, lets switches in a stack share power. The /2 part numbers are the same supplies packaged as a secondary unit. Choose the network module by uplink: C3KX-NM-1G for 1G SFP fiber, C3KX-NM-10G for 10G SFP+ fiber or DAC, C3KX-NM-10GT for 10G over Cat6a copper, and C3KX-SM-10G when you also want flow export from the switch. The 1G and 10G modules fit the Catalyst 3560-X as well. For stacking, 50 cm cables suit adjacent switches, 1 m suits a stack with gaps for patch panels, and 3 m lets you close the ring across a rack. Tell us whether your switch runs the LAN Base, IP Base or IP Services version if the module choice depends on it.

Frequently asked questions

Does a 3750-X need the notched power cord?
Yes. The C3KX power supplies have a keyed inlet and accept the CAB-3KX-AC cord rather than a standard C13 cord. Each supply we ship can include the cord; check the listing or ask.

Can a Catalyst 3750-X stack with a 3750G or 3750E?
A 3750-X stacks with the 3750-E over StackWise Plus using the same CAB-STACK cables. Mixing in the older 3750G works but the whole stack drops to the slower StackWise speed, so most buyers keep 3750-X and 3750-E stacks separate from 3750G stacks.

Is the network module hot swappable?
Yes. The rear C3KX network module and the power supplies can be inserted or removed with the switch running. Power supplies, fans and modules are sold separately so you can build the uplinks and redundancy your closet needs.

NetworkTigers has sold enterprise network equipment since 1996. Every module, power supply and cable carries the NetworkTigers 365-day warranty. Need enough to refit a whole stack? Ask us for a quote.