- 1x open contactor
- 1x threaded contactor
- 1x housing
- 3x M3 20mm cap-head screws
- 2x M3 nuts
- 1x piece of sand paper
~20g (depending on the wire and solder)
*This switch is used for 12lb and 30lb robots, however due to the size and weight of the product you will be able to use it as a beetle weigh switch.
Current and Voltage Rating:
AB-90 switches are rated for use with XT-90 connectors and 10AWG wire. We have tested steady state currents up to 300 amps and the switch remains working until after the wire has de-soldered from the XT-90. We have tested voltages up to 6s with the 100 ohm 1/4 watt anti-spark resistor, higher voltages may require a different value for this resistor (likely a 100 ohm, 1/2 watt resistor).
AB switches have an optional anti-spark switch. This makes them suitable for use with most brushless escs at higher voltages (12s), as the switch can pre-charge the capacitors in the escs before fully switching on. The anti-spark resistor is external, allowing users to pick a resistance value based on their application: 100ohms 1/4 watt works well for a single VESC 4.20, however if you are powering more escs you may need a lower value resistor (and potentially a higher wattage resistor).
AB switches are housed in impact resistant FDM 3d prints (exact material may vary by batch and with availability of filaments). High temp SLA nylon housings will be available at a later date as an upgrade item if I am able to find a reasonable supplier.
AB switches will ship with a small piece of sandpaper. The design is such that the contactors can be removed, and lapped with the sandpaper. This should greatly extend the lifespan of the switch; As corrosion builds up it can increase the resistance of the switch and lead to it over-heating under load. Regularly servicing the contactors by sanding them smooth and clean again will solve this issue.