ESTONE TJ-A125 3-in-1-out HDMI 2.1 video switch 8K@60Hz 4K@120Hz 48Gbps black

Three-source HDMI 2.1 switch

The ESTONE TJ-A125 is a unidirectional 3-in-1-out HDMI 2.1 switch that routes three source devices to a single display. It supports video resolutions up to 8K at 60 Hz and 4K at 120 Hz with a maximum bandwidth of 48 Gbps. The unit is intended for users who need to alternate between multiple consoles, media players or computers on one screen.

Build integration and cabling

All three HDMI 2.1 inputs and the single output are located on the same side of the aluminium enclosure, keeping cable runs tidy on a desk or in a rack. A front-panel button and indicator LEDs show the active source at a glance. The switch passes Dynamic HDR, eARC and HDCP 2.2 or 2.3 signals through without processing, so the connected display handles the final handshake.

Sustained-load behaviour

The 48 Gbps bandwidth ceiling is maintained across extended viewing sessions, allowing continuous 8K 60 Hz or 4K 120 Hz playback without compression artefacts. Audio formats including Dolby Atmos, DTS:X, DTS-HD Master Audio and Dolby Vision pass through transparently. The device is strictly one-way; it cannot distribute a single source to multiple displays.