KA-A30B B-mount Hotswap Plate for SXT/LF/65

›  Dedicated for Alexa SXT/LF/65 install

›  B-mount battery attach

›  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-A30B is a B-mount hot-swap plate for ARRI Alexa SXT / LF / 65 install. You don’ t need to switch off the camera when changing battery.

28.8V Power for ALEXA

Working with 28.8V B-mount battery, the KA-A30B power ALEXA SXT/LF/65 cameras at 28.8V (22-33.6V) by the rear contact pins, and when remove B-mount battery, the KA-A30B output reg. 28V to camera for hotswapping.

2mins at 200W load

KA-A30B 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-A30B 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-A30B provides:
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)

Inner battery voltage


Inner battery capacity


Power load

200W constant high load

5 pins DC connector

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 638g; With package1kg

Basic Package




  • 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-R30B

    B-mount Hotswap Plate for MINI / MINI LF

    200W high load, 2 minutes hot-swap, countdown seconds display, CNC housing

  • KA-R31B

    B-mount Hotswap Plate for MINI / MINI LF

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


leave a message ↓


We will collect your personal data requested by this registration in our databese, and the data will help us to give you the best possible services.

We will never reveal your personal informations to other purpose.You have a right to request your personal information to be deleted from our database at any time, by sending email to us: contact@swit.cc.