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Rear-Door Fan Unit

Assembly

Overview

The rear-door fan unit provides active heat removal for densely loaded racks where passive perforated doors cannot move enough air. It mounts in the rear door and pulls server exhaust out of the cabinet.

How it works

Six Blower Motor EC fan modules draw the hot air leaving the servers and expel it toward the hot aisle, lowering the pressure behind the equipment so more cold air is drawn through the front. A Fan Controller board reads rack temperature and modulates fan speed with PWM, running quietly at light load and ramping only when heat demands it, which saves energy versus fixed-speed fans. A dedicated Power Supply feeds the unit independently of the IT load, and a Wire Bundle harness distributes power and tachometer signals to each fan.

Rear-Door Fan Unit parts and their functions

4 top-level parts · 16 parts in total · full bill of materials below
Rear-Door Fan Unit parts diagram: 1 blower motor, 2 fan controller, 3 power supply, 4 wire bundle. 16 parts in 4 top-level items.
Rear-Door Fan Unit parts diagram. Numbers match the table below; each box is one top-level part or assembly with what it contains.
#PartQtyWhat it does
1 Blower Motor 6× EC fan modules
2 Fan Controller 3 parts 1× Fan speed controller
3 Power Supply 1× Fan unit PSU
4 Wire Bundle 1× Group of insulated conductors cut to length, terminated, and bound together to carry power and signals between the assemblies of a machine.

3D model

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Build & assembly graph

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Bill of materials for Rear-Door Fan Unit

4 top-level lines · 7 rows shown · 16 parts total · indented to 3 levels
# Item / sub-assembly Part no. Qty/assy Ext. qty Parts Type
1 Blower Motor blower-motor 6× 6 · part
2 Fan Controller 3 parts server-rack-fan-controller 1× 1 8 assembly
2.1 Bare PCB pcb-bare 1× 1 · part
2.2 Microcontroller mcu 1× 1 · part
2.3 Connector connector 6× 6 · part
3 Power Supply power-supply 1× 1 · part
4 Wire Bundle wire-bundle 1× 1 · part

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Where the rear-door fan unit is used

1 product across 1 domain contain it, directly or inside a sub-assembly

Used in 1 assembly

Server Rack

Sourcing: possible vendors

Browse the supplier directory → Prices, MOQ, and lead times are algorithmic estimates, not quotes, and not claims about these companies. Company mappings are curated by keyword; est. price band $0.50–$100. How estimates work
VendorHQSpecialtyMOQLead time
🇨🇳Foxconn
foxconn.com ↗ 		Shenzhen, CN Electronics contract mfg 1,000 pcs 6–10 wks
🇸🇬Flex (Singapore)
flex.com ↗ 		Singapore Electronics contract mfg 1,000 pcs 6–10 wks
🇮🇳Dixon Technologies
dixoninfo.com ↗ 		Noida, IN Electronics contract mfg 1,000 pcs 6–10 wks
🇨🇳BYD Electronics
bydelectronic.com ↗ 		Shenzhen, CN Electronics contract mfg 1,000 pcs 6–10 wks
🇸🇬Venture Corp
venture.com.sg ↗ 		Singapore Electronics contract mfg 1,000 pcs 6–10 wks

133-word article