ATEN VS481C 4-Port True 4K HDMI Switch
The ATEN VS481C is a four-input, single-output HDMI switch built to handle True 4K signals — passing 4096 x 2160 and 3840 x 2160 at 60Hz with full 4:4:4 chroma sampling — without the color-subsampling compromises that trip up cheaper switching hardware. If you're routing 4K60 sources to a single display in a control room, digital signage installation, or presentation suite, the VS481C gives you clean signal integrity at up to 5 meters of HDMI cable run. The IR receiver and remote-control input let you switch sources without touching the unit — a practical advantage in rack-mounted or hard-to-reach installs.
Key Features
- True 4K @ 60Hz with 4:4:4 Chroma: The VS481C passes 4096 x 2160 and 3840 x 2160 at 60 frames per second with full 4:4:4 color sampling intact. This matters when downstream displays or recorders depend on accurate color reproduction — subsampled 4:2:0 from lesser switches introduces visible artifacts on fine detail and text.
- 5-Meter Guaranteed Signal Distance: ATEN specifies clean 4K60 4:4:4 throughput across cable runs up to 5 meters. Plan your rack-to-display cable path accordingly — going beyond this distance at full 4K60 spec risks signal degradation without an active extender in the chain.
- IR Remote Switching: The built-in IR receiver (1 x Mini Stereo Jack Female, Black) accepts standard IR remote commands, letting operators switch between four HDMI sources from across the room. This eliminates the need to reach into a rack or behind a display in fixed-install environments.
- DIP-Selectable Auto Switch: The auto-switch function — toggled via onboard DIP switch — automatically activates the most recently connected or powered source. In presentation rooms where sources come and go, this removes the manual switching step and reduces operator error.
- Locking DC Power Connector: The power jack uses a locking DC connector, not a friction-fit barrel plug. In rack and podium installations where vibration or cable management creates tension on connectors, a locking power connection means the unit stays powered and avoids mid-presentation failures.
- Rack-Compatible Form Factor: The VS481C is designed for rack mounting, fitting cleanly into AV and IT equipment racks alongside other signal distribution hardware. Combined with the IR receiver, it integrates naturally into managed AV infrastructure without occupying dedicated operator-accessible shelf space.
- Controlled Humidity Operating Range: Rated for 0–80% RH non-condensing, the VS481C handles standard conditioned equipment room and office environments. Not rated for outdoor or unconditioned industrial spaces — deploy indoors where humidity is managed.
- Field-Upgradeable Firmware: ATEN releases firmware updates for the VS481C (current: v1.1.104, released 2020-07-22). Firmware upgradability means compatibility issues or feature refinements can be addressed post-deployment without replacing hardware.
Integration and Compatibility
The VS481C accepts up to four HDMI sources and outputs to a single HDMI display or recording device. The 5-meter maximum cable distance at 4K60 4:4:4 applies to the HDMI output run — factor this into rack placement relative to the display. IR control integrates with standard IR remotes or control systems equipped with an IR blaster output via the 3.5mm mini stereo jack input. For environments requiring longer cable runs beyond 5 meters at 4K resolution, pair the VS481C with an HDMI extender or fiber converter rated for your target resolution and distance. The auto-switch DIP setting is particularly useful in environments where only one source is active at a time, such as training rooms or executive briefing centers with rotating presenter devices. For broader ATEN AV switching and distribution options — including matrix switchers and multi-output configurations — review the full ATEN product line to match channel count and I/O topology to your installation requirements.
Frequently Asked Questions
Q: What is the maximum resolution and refresh rate the VS481C supports?
A: The VS481C supports True 4K resolutions — 4096 x 2160 and 3840 x 2160 — at 60Hz with full 4:4:4 chroma sampling. This is the maximum rated throughput per ATEN's published specifications.
Q: What is the maximum HDMI cable run length at 4K60?
A: ATEN specifies a maximum cable distance of 5 meters at 4096 x 2160 / 3840 x 2160 @ 60Hz (4:4:4). Longer runs at full spec require an active HDMI extender.
Q: How does the IR remote input work on the VS481C?
A: The VS481C includes one IR receiver and a 3.5mm mini stereo jack female connector for IR input. This allows source switching via an IR remote or a control system IR emitter without physical access to the unit — useful in rack or podium installations.
Q: What does the DIP switch auto-switching function do?
A: The DIP-selectable auto-switch function causes the VS481C to automatically route the most recently connected or powered HDMI source to the output. It can be toggled on or off via the onboard DIP switch depending on your switching preference.
Q: Can the VS481C firmware be updated in the field?
A: Yes. ATEN provides firmware updates for the VS481C — the current release is v1.1.104 (released 2020-07-22), downloadable from ATEN's support site.
Q: Is the VS481C suitable for outdoor or industrial environments?
A: No. The VS481C is rated for 0–80% RH non-condensing humidity and is intended for conditioned indoor environments such as equipment rooms, offices, and AV racks. It is not rated for outdoor or unconditioned industrial deployment.
The VS481C is the unit I reach for when a fixed-install AV or control room environment needs 4-source HDMI consolidation without signal compromise — specifically when the downstream display or capture card demands full 4:4:4 at 60Hz. The 5-meter cable distance ceiling is real and worth planning around before you run conduit.
Technical Highlights:
- 4K60 4:4:4 Passthrough: True 4096 x 2160 and 3840 x 2160 at 60Hz with full chroma — not the 4:2:0 subsampling you get from entry-level switches that technically claim 4K60 support but compress color on the way through.
- IR Receiver + 3.5mm Control Input: One onboard IR receiver plus a Mini Stereo Jack Female input means you can wire in a control system IR emitter directly — clean integration into Crestron, AMX, or Extron control frameworks without adding a separate IR distribution layer.
- Locking DC Power Jack: Rack installs accumulate cable tension over time. The locking DC connector on the VS481C is a detail that matters at 2am when a friction-fit power plug would have pulled loose during a cable management tidy-up.
Deployment Considerations:
- The 5-meter HDMI distance limit at 4K60 4:4:4 is the primary constraint to plan around. If your display or monitor is more than 5 meters from the rack, budget for an active HDMI extender — passive cables will not maintain spec at that resolution and refresh rate over longer runs.
- The auto-switch DIP feature is useful but binary — it's either on or off for all ports. In multi-source environments where you need deterministic manual control of which source is active, disable auto-switch and assign switching to your control system or IR remote workflow.
Best fit: a four-source 4K presentation system in a corporate boardroom, training facility, or operations center where rack mounting, IR control, and reliable 4K60 signal integrity are non-negotiable and cable runs stay under 5 meters.
