KA-R30B B-mount Hotswap Plate for MINI / MINI LF

›  Dedicated for Alexa MINI / MINI LF install

›  B-mount battery attach

›  8-pin LEMO output to camera

›  28V, 32Wh 3Ah battery cells inside

›  200W constant high load

›  At least 2 minutes run time

›  120 seconds countdown display

›  2x D-tap regulated 14V output

›  1x 2-pin LEMO regulated 14V output

›  USB 5V/2A x1 power output

›  22-33.6V 8-pin input for power station hotswap

›  Aluminum CNC unibody housing

›  Multiple circuit protections


B-mount Hot-swap Plate

KA-R30B is a B-mount hot-swap plate for ARRI Alexa MINI / MINI LF install, power cameras at 28.8V (22-33.6V) by 8-pin DC-IN. When remove the B-mount battery, 8-pin DC output Reg. 28V for hotswapping. You don’ t need to switch off the camera when changing battery.


KA-R30B matches with ARRI original MINI / MINI LF support system by connection with RAB-1 Clamp 2 (K2.0023406).

* KA-R30B doesn’ t include the K2.0023406 clamp.

2mins at 200W load

KA-R30B has 32Wh/3Ah battery cells inside, 200W constant high load, even after 1000 cycle times, the plate can still ensure 2 minutes hot swap time for changing battery.

120s Countdown Display

KA-R30B provides an LCD screen to display countdown seconds when changing battery. When battery is removed, the screen will countdown from 120 seconds. You just need to put on a new battery before it count down to 0.
The new battery will charge the hotswap plate as well. You can see the countdown seconds will go back to 120 after a period of time.

Power Interfaces

KA-R30B provides:
1x 8-pin 28V to ALEXA MINI/MINILF
2x D-tap 14V Reg. output
1x 2-pin LEMO 14V Reg. output
1x USB-A 5V/2A output
1x 8-pin 22-33.6V input (For power station hotswap)

15mm Rod Adaptor

KA-R30B provides with a free 15mm Rod Adaptor in the package, to install on the old style ALEXA MINI 15mm rig system.

Inner battery voltage

28V regulated

Inner battery capacity


Power load

200W constant high load

8-pin LEMO output

Attach battery: 22-33.6V to camera

Remove battery: 28V / 200W to camera

D-tap output x2

14V regulated, 70W

2-pin LEMO output

14V regulated, 70W

USB-A output

5V, 10W/2A

8-pin LEMO input




Net weight

Net 730.5g; With package0.95kg

Basic Package




  • 15mm Rod Adaptor

  • HB-A290B

    290Wh 28.8V B-mount Battery Pack

    ALEXA 35 battery, 250W/10A high load, D-tap 16V x2, USB-C 60W in&out, OLED power info

  • PC-P461B

    4x100W Super Fast B-mount Charger

    3h50m fully charge 4x 290Wh batteries, 3.5-inch color LCD screen

  • KA-A30B

    B-mount Hotswap Plate for SXT/LF/65

    Install on ARRI ALEXA SXT/LF/65 install, Run 2min at 200W, 120s countdown display

  • KA-R31B

    B-mount Hotswap Plate for MINI / MINI LF

    200W high load, 2 minutes hot-swap, SDI 1-2 with isolater, CNC housing


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