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Description
Cisco Dust Filter (A903-FAN-F)Cisco Dust Filter (A903 FAN F) Protect your Cisco routers internal components from dust and debris with the Cisco Dust Filter, designed specifically for fan trays. This high performance filter uses a quadrafoam material with a precise 45PPI density to deliver robust filtration while preserving airflow essential for reliable cooling. With the A903 FAN F dust filter in place, you can extend the life of critical components, reduce the need for frequent
Cisco Dust Filter (A903-FAN-F)
Protect your Cisco router’s internal components from dust and debris with the Cisco Dust Filter, designed specifically for fan trays. This high-performance filter uses a quadrafoam material with a precise 45PPI density to deliver robust filtration while preserving airflow essential for reliable cooling. With the A903-FAN-F dust filter in place, you can extend the life of critical components, reduce the need for frequent maintenance, and keep your networking hardware running smoothly in challenging environments. The kit includes a dedicated dummy cover, A903-FAN-F-B, to secure the filter firmly inside the chassis, safeguarding against dust intrusion without compromising performance. Built for seamless compatibility, this dust filter is tailored to work with Cisco router fan trays, ensuring an easy, nuisance-free upgrade for ongoing protection.
- Quadrafoam 45PPI filter delivers up to 85 percent dust resistance, helping to prevent dust from reaching sensitive router components while allowing steady airflow.
- Dummy cover A903-FAN-F-B secures the dust filter in the chassis, providing a reliable seal that minimizes air leaks and dust ingress during operation.
- Designed for full compatibility with Cisco router fan trays, ensuring a straightforward replacement process without adapters or modifications.
- Simple maintenance and replacement process—swap in the A903-FAN-F filter when needed to maintain clean, efficient cooling and ongoing performance.
- Durable construction with a focus on long-term reliability in demanding networking environments, helping to keep your Cisco hardware running at its best.
Technical Details of Cisco Dust Filter (A903-FAN-F)
- Filter material: Quadrafoam with 45PPI density
- Dust resistance: Approximately 85 percent
- Compatibility: Fully compatible with Cisco router fan trays
- Included components: Dust filter (A903-FAN-F) and dummy cover (A903-FAN-F-B)
- Part identifiers: A903-FAN-F (dust filter); A903-FAN-F-B (dummy cover)
How to install Cisco Dust Filter (A903-FAN-F)
- Power down the Cisco device and unplug it from power to ensure safe installation.
- Open the fan tray area to access the dust collection path where the filter will sit.
- Remove any existing dust cover or filter if present, taking care not to disturb other components.
- Insert the quadrafoam dust filter (A903-FAN-F) into the designated slot of the fan tray, ensuring a snug and flush fit.
- Attach the dummy cover A903-FAN-F-B to secure the filter in place, creating a tight seal that prevents dust from bypassing the filter.
Frequently asked questions
-
Q: What is the Cisco Dust Filter (A903-FAN-F) designed to do?
A: It is designed to protect Cisco router fan trays from dust buildup by using a quadrafoam 45PPI filter with up to 85 percent dust resistance, while maintaining proper airflow for cooling. -
Q: Is the A903-FAN-F compatible with all Cisco router models?
A: The filter is described as fully compatible with Cisco router fan trays, meaning it should fit standard Cisco router configurations that use the A903-FAN-F style filter and the accompanying A903-FAN-F-B dummy cover. -
Q: What does the dummy cover (A903-FAN-F-B) do?
A: The dummy cover secures the dust filter inside the chassis, helping to seal the installation and prevent dust leaks while preserving airflow to the fan. -
Q: How effective is this filter at dust protection?
A: The filter is rated for up to 85 percent dust resistance, providing a significant barrier against dust ingress in many networking environments. -
Q: How should I maintain or replace this filter?
A: When filtration efficiency declines or maintenance is due, remove the dummy cover, replace the filter with a new A903-FAN-F, and re-secure with the A903-FAN-F-B cover to restore dust protection.
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Exchange/Return Notes
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4.7 ★★★★★
Based on 22 reviews
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Product Reviews
★★★★★ 4
Good product, expensive price, poor adhesive
Premium packaging for a premium device. Useful for IR remote signal delivery with extra functions on the side. Price though is luxury for it’s use. Used this for a Logitech Harmony hub control of an non-smart electric fireplace. Setup is a breeze but only if you’re tech savvy. Highly recommend to watch the YouTube video for information on all it’s application. There a many other cheaper devices similar to this available on Amazon that I could have used for the same application. If you have a need for multiple control within the same vicinity of other devices, this may be more useful for you. However, if you plan on utilizing an IR repeater/extender for only a single device and would like to save some money, don’t buy this one. This device works quite well though. Have had no issues achieving the effect needed. Only four stars due to the poor adhesive on the emitter attachment. As stated earlier, I used this on an electric fireplace with a glass surface. I used the attachable emitter to the front glass sensor where the IR receiver was located on the fireplace. After only one day, the emitter attachment fell off even though I made sure the glass was thoroughly cleaned prior to adhering it. Otherwise a good product.
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Reviewed in the United States on November 8, 2019
★★★★★ 5
Denon avr ir remote port works great with sewell products
I bought a new entertainment center with glass doors and wasn't getting good signal range with the door closed. Plus i couldnt get a good of line site, since this cabinet was shorter than the orginal, and the location for my avr was further to the left than before and now my line of sight to the receiver was blocked from other parts of the room due to high couch back.
I tried a couple different cheap $10 devices that used stick on transmitters/receiver buttons but they were clumsy and didn't provide me a total solution for my room layout.
Works fantastic with a denon x1800 receiver (and many other models). It works directly with the denon's ir remote port in the back of the avr port. The solution is actually quite simple.
Plug a stereo 3.5 mm male to male plug in the denon ir port in the back of the avr and and the other end to the orange emitter box(puck). The pics are about the size of an oreo double stuff cookie Tuck the orange box/puck away whereever and plug the power in. The box doesn't need to seen or be pointed towards anything. It's location is only limited by the length of your stereo cable and access to AC power
Put the blue box puck anywhere in the room where you have general line of sight to it from where you will be using your remote, and plug power in. In my case, its sitting on top of one of my tower speakers. From there it clears the back of the couch and can see from the family room, eat-in kitchen area, and the kitchen beyond.
Done.
I didn't need or use any of the included emitter or transmitter cables, though if you dont have a denon, or other brand avr with an ir port to plug into , or also want to hide the blue puck ( in which case attach the included sensor cable), you'll need them. But for denon users with an ir port, you just use the two pucks and their usb power adapters. Simple.
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Reviewed in the United States on April 17, 2026
★★★★★ 1
Worked good then died at six months (Updated)
Worked good for a couple of months, then started to develop a lag between when you pressed a button on the remote, and when the TV would respond. If I moved the speaker blocking the TV’s IR receiver, and pointed the remote at it, it worked perfectly. Add the IR blaster back in and the delay returns. The delay kept getting longer and longer, sometimes 5 to 10 seconds. Then it just died. Would not pass any IR signals, even though the receiver and emitter both had power. Tried rebooting, changing communication channels to no avail. Out of Amazon return window. Manufacturer wants you do go through a troubleshooting process for warranty that is too complicated and time consuming. Customer Service Rep at Sewell send me a warranty replacement.
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Reviewed in the United States on May 21, 2025
★★★★★ 5
Nice Product and Customer Service
I ordered this BlastIR Wireless Pro IR Repeater from Sewell to replace a wired version of an IR repeater from another company. We have moved our TV on to a wall location and are in the process of hiding all the wiring out of sight behind walls and/or in a cabinet. We still have some wires to go, but this product has enabled us to eliminate the IR wiring all together. It's a real improvement in both looks and performance over the cheaper, wired version we originally tried.
The BlasterIR's Receiver is the component that faces the room and receives the IR signal from our remote controls. It's small enough to fit in the space between our sound bar and the bottom of the TV. It's range is great for our room size (about 22' long and 18' wide) and picks up the remotes signal from a side angle that's almost parallel to the TV itself. The receiver is powered through one of the USB ports integrated into the TV (although the device itself supports either a USB or regular plug-in option). I haven't used them yet but Sewell appears to have provided a few options to help with affixing the IR devices in their final positions including some adhesive pads and a magnetic pad option as well.
I'm still playing around with the permanent placement of the IR Blaster Emitter. It sits inside a closed cabinet and faces the concealed cable box receiver, router and DVR components. It retransmits the various IR signals it receives from the IR receiver by blasting that signal to anything it faces. I just placed it in the cabinet about 5" away from the devices I wanted to control, plugged it in and it worked with no other set up.
So far the BlastIR is working seamlessly and with much better function response time than the cheaper IR version we'd tried at first. The lag time between when a button is pressed on the remote control and the action taking place on the device I'm communicating with is minimal. The emitter itself is plugged into an outlet on a surge protector powering the other in-cabinet devices, although it too could be powered via the provided USB connection if desired.
As a note, we did experience a shipping issue during our ordering process. The order it self was processed quickly and shipped in a timely manner. However, there was an issue with our actual receipt of the product and the USPS who reported it delivered to our mailbox when in fact it had not been. Regardless, we reached out to Sewell directly and they quickly resolved the issue for us with no problems and in a timely manner. I would recommend both this IR Blaster Pro product as well as Sewell as a trusted company itself.
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Reviewed in the United States on February 8, 2021
★★★★★ 3
Does NOT Transmit Through Walls
Quick and easy setup! Works great within the room. However, will not work effectively between walls (i.e. - AV closet to living room).
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Reviewed in the United States on February 8, 2026