© Copyright 2022 Japan Homeland security Corporation. All Rights Reserved.
Aluminium honeycomb fan shield with threaded holes
A range of low-cost EMC vents for use with standard fan size fans. The aluminium honeycomb fan shield 9535 series is designed to provide EMI shielding and maximum airflow without degrading the fan output.
These vents provide a low-cost option to perforated metal when airflow rates are critical. An aluminium frame is fitted with one layer of 6.35, 12.7 or 25.3 mm thick honeycomb material and an optional Amucor conductive gasket to ground the honeycomb to the metalwork.
Holland Shielding Systems B.V. stocks aluminium Honeycomb Fan Shield in almost all sizes corresponding to industry-standard fans with standard 4-hole mounting (See table below for the standard sizes).
Dust screen (on request)
Dust screens consisting of multilayer expanded aluminium can be added, but airflow will be restricted.
Shielding performance
Shielding performance is achieved from 1/8 cell aluminium honeycomb panels with compressed edges mounted in a square-shaped flat Mu-ferro plate with a circular cut-out on the inside. The contact with the housing is made with an amucor shielding gasket cut into the correct shape of the Honeycomb fan shield.
Performance below has been measured with honeycomb specifications 1/8 Cell size, 1/4 Thick.
| Frequency | Field | Typical (dB) |
| 200 kHz | H | 53 |
| 100 MHz | E | 102 |
| 500 MHz | P | 85 |
| 2 GHz | P | 74 |
| 10 GHz | P | 58 |
Standard dimensions
In the table below some common types are specified to illustrate the required information. Threaded hole diameter is standard M3 but it can also be delivered in any other size.
Material thickness
| Part number | Outer dimension | Mounting holes horizontal | Mounting holes vertical | |||||
|---|---|---|---|---|---|---|---|---|
| A | B | C | D | Nr | E | Nr | G | |
| 9535-40-40 | 40 | 40 | 31.5 | M3 | 2 | 32 | 2 | 32 |
| 9535-50-50 | 50 | 50 | 41.2 | M3 | 2 | 40 | 2 | 40 |
| 9535-60-60 | 60 | 60 | 53 | M3 | 2 | 50 | 2 | 50 |
| 9535-70-70 | 70 | 70 | 66 | M3 | 2 | 61.5 | 2 | 61.5 |
| 9535-80-80 | 80 | 80 | 76.5 | M3 | 2 | 71.5 | 2 | 71.5 |
| 9535-90-90 | 90 | 90 | 85 | M3 | 2 | 82.5 | 2 | 82.5 |
| 9535-120-120 | 120 | 120 | 115.06 | M3 | 2 | 104.8 | 2 | 104.8 |
| 9535-140-140 | 140 | 140 | 130 | M3 | 2 | 125 | 2 | 125 |
| 9535-220-220 | 220 | 220 | 206.5 | M3 | 2 | 170 | 2 | 170 |
| (Optional) other sizes on request | ||||||||
© Copyright 2022 Japan Homeland security Corporation. All Rights Reserved.