SWIT KA-R31B | High load with multi sockets Hot-Swap Adaptor with SDI 1to2, for 28V B-Mount battery

The SWIT KA-R31B B-mount Hotswap Plate is a professional power and signal distribution solution designed specifically for ARRI ALEXA MINI and MINI LF cameras. Featuring built-in backup battery cells, 28V regulated output, and SDI distribution, it enables true hot-swapping without powering down the camera.

The SWIT KA-R31B B-mount Hotswap Plate is engineered for seamless power management on ARRI ALEXA MINI and MINI LF cameras. Designed for direct installation, it supports B-mount batteries and delivers regulated 28V power (22–33.6V) to the camera via an 8-pin LEMO DC output, ensuring reliable performance for high-end cinema production.

The KA-R31B features internal 32Wh (3Ah) battery cells, providing at least 2 minutes of backup runtime when the main B-mount battery is removed. During this period, the plate supplies regulated 28V output, allowing operators to hot-swap batteries without shutting down the camera. A built-in 120-second countdown display clearly indicates remaining backup time.

Supporting demanding workflows, the unit delivers up to 200W constant output and includes multiple regulated accessory outputs: two 14V D-tap ports, a 14V 2-pin LEMO output, and a USB 5V/2A port. For expanded system integration, it also supports 22–33.6V 8-pin DC input from external power stations for hot-swap operation.

In addition to power distribution, the KA-R31B provides 3G-SDI 1-in / 2-out signal distribution with an integrated SDI isolator, ensuring stable and protected video signal routing. Built with an aluminum CNC unibody housing and equipped with multiple circuit protections, the KA-R31B is a robust, production-ready solution for professional cinema environments.

Key Features

• Dedicated B-mount hotswap plate for ARRI ALEXA MINI / MINI LF

• Powers camera at 28.8V (22–33.6V) via 8-pin LEMO

• Built-in 32Wh / 3Ah backup battery for hot-swapping

• At least 2 minutes runtime during battery change

• 120-second countdown display

• 200W constant high-load output

• 2× D-tap 14V regulated outputs

• 1× 2-pin LEMO 14V regulated output

• USB 5V / 2A output

• 22–33.6V 8-pin input for power-station hot-swap

• 3G-SDI 1-in / 2-out distribution with SDI isolator

• Aluminum CNC unibody housing

• Multiple circuit protection systems