Cisco QSFP-H40G-CU1M Compatible 40G QSFP+ Passive Copper Cable, 1m (3ft)

This QSFP-H40G-CU1M compatible DAC cable provides a 40G direct connection for Cisco equipment in a fixed 1m (3ft) configuration. The QSFP+ to QSFP+ assembly integrates both ends and the cable, giving data-center designers one defined product to evaluate for reach, rack layout, airflow and host compatibility.

OEM Part Number: QSFP-H40G-CU1MHT Part Number: QSFP-H40G-CU1M

Product Highlights

Compatible alternative to Cisco QSFP-H40G-CU1M
40G connectivity at 40Gbps
Interface configuration: QSFP+ to QSFP+
Fixed length and part number: 1m (3ft), QSFP-H40G-CU1M
Conductor specification: 30AWG
Minimum bend radius: 35mm

Specifications

HT Part Number	QSFP-H40G-CU1M
Cisco Compatible	QSFP-H40G-CU1M
Manufacturer	HT
Connector Type	QSFP+ to QSFP+
Max Data Rate	40Gbps
Minimum Bend Radius	35mm
Wire AWG	30AWG
Cable Length	1m (3.28ft)
Jacket Material	PVC (OFNR)
Temperature	0 to 70°C (32 to 158°F)
Protocols	SFF-8436, QSFP+ MSA and IEEE 802.3ba

Cable Construction and Routing

This assembly uses 30AWG conductors, PVC (OFNR) jacket, minimum bend radius 35mm. These mechanical characteristics affect how the cable should be dressed behind the equipment. Avoid sharp edges, excessive ties and repeated tight bends close to the connector boots.

Passive Copper Operation

A passive DAC has no separate optical conversion stage. Its low-power, low-latency operation is useful for short equipment links, but the assembly must remain within the length and signaling mode accepted by both hosts.

Length Selection and Installation Planning

At 1m (3ft), QSFP-H40G-CU1M is a practical choice for direct connections within one rack. Route the cable along the intended management path rather than pulling it diagonally across adjacent connectors, and leave enough clearance for insertion, removal and front-panel airflow.

Position Within the Length Range

QSFP-H40G-CU1M occupies the middle of this family between QSFP-H40G-CU50CM at 0.5m (2ft) and QSFP-H40G-CU1.5M at 1.5m (5ft). It adds 0.5m over the shorter option for extra routing clearance, while the next longer version adds another 0.5m. Measure the managed path and choose this version when its reach is sufficient without creating the slack associated with the longer assembly.

Data-Center Design and Airflow

Select the assembly by both reach and rack layout. A direct connection removes separate module-and-patch-cord interfaces, but it still needs a bend-safe pathway and clear connector access. Keep cable bundles from blocking front-panel airflow, account for the listed interface power where applicable and choose a length that supports maintenance without leaving an unmanaged coil. For this assembly, the listed conductor specification is 30AWG; the minimum bend radius is 35mm; the jacket material is PVC (OFNR).

Network and Protocol Considerations

The intended application is determined by the host interface and protocol support. Listed interface and protocol references include SFF-8436, QSFP+ MSA and IEEE 802.3ba. Confirm that the host firmware and port configuration support the same operating mode.

Quality Assurance and Packaging

Each cable receives connector inspection and a functional link check before it is coiled with bend-safe slack and packed. Protective materials shield the connector housings during transport. Rack or project labels are available to keep length, part number and installation destination aligned. Volume orders can include customer references on the labels and carton list.

Ordering Information

Provide the OEM reference, HT part number, fixed length and quantity, together with the intended host interfaces. Rack-based quantities and packaging instructions can be included for larger deployments. Other lengths are separate products and should be entered on their own order lines. Quantity and any labeling instructions should be attached specifically to QSFP-H40G-CU1M.

Cisco Compatibility and Factory Testing

Compatibility confirmation combines host identification with actual link establishment and diagnostic checks. The assembly is prepared for the stated OEM reference rather than selected only by connector shape. For a new data-center deployment, the equipment model, port mode and software release provide the most useful basis for a pre-order review. The check includes link stability and diagnostic indications, followed by a final inspection of both ends.

Frequently Asked Questions

Is this an original Cisco cable?

No. It is an HT-manufactured compatible alternative for equipment that specifies Cisco QSFP-H40G-CU1M.

What details assist a compatibility review?

Provide the equipment manufacturer, model, port type, hardware revision and software release, together with the OEM reference, required length and quantity.

How should an unused assembly be stored?

Protect both connector ends, keep the cable in a loose bend-safe coil and retain its part-number label so the length and compatibility identity remain traceable.

Can different brands be connected with the same assembly?

Only where both hosts explicitly support the complete interface and compatibility arrangement. Document each end and select the appropriate brand-specific product when required.

Shipping and Lead Time

Available stock is generally dispatched within one to three working days after order confirmation, with production lead times advised for larger quantities. Delivery can be arranged by courier, air freight or sea freight, and goods may instead be handed to an appointed forwarder or shipped on the customer’s courier account.