XT90S-F Female Connector for LiPo Battery ESC Brushless Motor

Specifications:

• Model: XT90S-F (Anti-Spark Female)
• Connection Type: DC Power Plug
• Rated Current: 90A Continuous
• Peak Current: 120A (Instantaneous / Burst)
• Built-in Technology: Stepped Anti-Spark Resistance Ring
• Contact Material: Gold-Plated Brass
• Housing Material: Flame-Retardant High-Temp Nylon (PA66)
• Recommended Wire Gauge: 8 AWG to 10 AWG
• Operating Temperature: -20°C to +120°C
• Flammability Rating: UL94 V-0

Applications

• High-Performance RC Vehicles: Heavy-duty RC airplanes, EDF jets, and giant-scale gas-to-electric conversions.

• Drones & Unmanned Aerial Vehicles (UAVs):Agricultural spraying drones requiring heavy power distribution.
• Electric Mobility & Personal Transport:DIY electric skateboards, longboards, and hoverboards.
• Robotics & Industrial Electronics: High-torque combat robots and heavy-duty competition bots.

Unlock New Capabilities

• If you've already experimented with... Standard XT60 connectors or basic T-plugs (Deans) on smaller 3S or 4S LiPo builds, you're likely familiar with high-current DC connections. However, as you step up to higher cell counts (6S, 8S, or 12S power systems), the initial surge current into the ESC capacitors causes violent arcing when plugging in.
• This XT90S Anti-Spark Connector unlocks... The ability to build powerful heavy-lift drones, high-speed RC aircraft, electric skateboards, and custom EV powertrains safely. The integrated stepped anti-spark resistor pre-charges the ESC capacitors in milliseconds before full contact is made, completely eliminating electrical sparks, pitting on terminal pins, and sudden current spikes that can damage sensitive electronics.
• Effort Level: Intermediate

Minimum hardware to get started:

• High-Power Soldering Iron (60W to 100W, ideally with a large chisel tip): bullet connectors of this thermal mass dissipate heat rapidly. A low-wattage iron will produce cold solder joints or melt the plastic housing before the solder flows cleanly.
• 10 AWG to 8 AWG High-Flex Silicone Wire: standard stiff PVC wire cannot carry 90A continuously and lacks the temperature resistance required for high-draw brushless setups.
• Rosin Core Lead-Free Solder & Flux: to ensure strong capillary action when tinning the large rear solder cups.

Package Includes:

• 1 x XT90-S Anti-Spark Connector with Housing-Female

Frequently Asked Questions

• Is the XT90S connector backward compatible with standard XT90 connectors?
  Yes, the XT90S female plug mates perfectly with any standard XT90 male connector as well as XT90S male plugs.
• Can I use this XT90S female connector with 6S or 12S LiPo battery setups?
  Yes, the anti-spark feature is specifically designed to handle high-voltage battery sparks from setups ranging from 6S (22.2V) up to 12S+ (50V+).
• Will this connector work with an Electronic Speed Controller (ESC) from any brand?
  Yes, as long as the ESC uses a standard XT90 male plug on its input leads, this female connector will mate seamlessly.
• Can I use this connector for an electric skateboard or e-bike conversion?
  Yes, XT90S connectors are very popular in electric skateboards and custom light electric vehicles (LEVs) to prevent sparks when connecting main batteries.
• What is the continuous current rating for the XT90S female connector?
  It is rated for 90A continuous current and can handle short peak bursts of up to 120A without excessive heating.
• How does the anti-spark mechanism actually work inside the connector?
  The female socket features a stepped tip with an internal resistor that pre-charges the load's capacitors upon initial insertion, eliminating the spark before full contact is established.
• Does the anti-spark feature restrict continuous current flow during operation?
  No, the resistor is only engaged in the first millimeter of insertion; once fully plugged in, solid gold-plated brass terminals carry the full 90A load directly.
• Which side of the circuit should the female (XT90S-F) connector be soldered to?
  Always solder the female connector to the power source (LiPo battery), as the shrouded socket prevents accidental shorts across the contacts.
• What wire gauge should I use with the XT90S connector?
  It is designed for thick, high-current wires ranging from 8 AWG to 10 AWG silicone flexible wire.
• Do I need heat shrink tubing if the connector includes a plastic rear cap?
  The snap-on rear sheath covers the soldered leads, but adding heat shrink tubing underneath provides an extra layer of strain relief and insulation.
• Do I need any software configuration or microcontroller code to activate anti-sparking?
  No, the XT90S anti-spark system is entirely passive and mechanical, requiring no microcontrollers or external circuitry.
• Can I monitor current draw directly through the XT90S connector?
  The connector does not include built-in sensors; you must install an external inline Hall-effect or shunt current sensor to monitor current.
• Is there an EDA / CAD footprint available if I want to panel-mount or PCB-mount this?
  Standard XT90 3D CAD models and panel cutout drawings can be found by searching "XT90 connector 3D CAD step file" on GrabCAD or manufacturer sites.
• Why did I still hear a small spark when plugging in my XT90S connector?
  This usually happens if the connector is jammed together too fast, bypassing the initial stepped resistor phase, or if the internal resistor ring has worn out after excessive wear.