Hirschmann D4K-AIR Technical Review for Maintenance Engineers, Integrators and Procurement Teams

Manufacturer data for review

Confirm the exact modular component

Hirschmann D4K-AIR identifies the Hirschmann DRAGON MACH4000 hot-swappable fan unit, model D4K-AIR, part number 942157001. The manufacturer record describes it as: DRAGON MACH4x00 fan unit; hot-swappable; 5 load sharing inbuilt fans. Keep the model and part number together because this item is a chassis component or accessory, not a complete operational switch.

Match the parent DRAGON MACH4000 system

Confirm the exact DRAGON MACH4000 or DRAGON MACH4500 chassis, available slot and accepted hardware or software revision before ordering. A similar module faceplate does not prove electrical, mechanical or system compatibility. Photograph the chassis label and existing module arrangement.

Reference photograph: shared Hirschmann product image. The photographed unit may be a different model or product type; this image does not establish the configuration or availability of Hirschmann D4K-AIR.

Review interface, power and mechanical data

The saved manufacturer data lists interfaces as not applicable for this accessory, operating supply as power supply via the backplane of the switch, power reference as 20 W, and dimensions of 55 mm x 410 mm x 85 mm. Check rack clearance, airflow, slot position, transceiver or cable needs and the complete installed load rather than reviewing one module in isolation.

Build the complete bill of materials

List the chassis, management or routing engine, media modules, power supplies, fan unit, blanking panels, SFP transceivers, patch leads and mounting accessories as separate line items. Ask the quotation to state what is included so a panel, power module or line card is not mistaken for a complete switch system.

Replacement and maintenance planning

Before removal, back up the current switch configuration and record the installed slot, adjacent modules, LED state, cabling and fault symptoms. Follow the approved shutdown, hot-swap, ESD and site safety procedure appropriate to the exact component. Retain the removed label for comparison with the delivered item.

Prepare a component-specific RFQ

Request Hirschmann D4K-AIR, part number 942157001, with quantity, destination and target delivery date. Include the parent chassis, installed slot, full module inventory, system release and required documentation. For expansion work, add the port plan, expected traffic, transceiver types and redundancy design where applicable.

Receipt and lifecycle record

At receipt, verify the delivered part number, hardware revision and packing contents before installation. Store label photographs, acceptance checks, configuration backups and the approved bill of materials under the parent switch asset so later maintenance can distinguish the accepted build from nearby D4K variants.

Technical reference: manufacturer source for D4K-AIR. Verify current documentation and the delivered revision before final engineering approval.