This is a cache of https://www.futaba.co.jp/en/product/industrial_servo/command_type_servos/rs204md. It is a snapshot of the page at 2026-06-27T01:01:11.156+0900.
RS204MD | Futaba Corporation

RS204MD

Part Number / Product Name / List Price

<00400108-3 ROBOT SERVO RS204MD FUTABA>

Specifications

  • Torque:           2.1 [kgf·cm]
  • Speed:            0.19 [s/60°]
  • Weight:           12 [g]
  • Dimensions:       27.9 × 16.0 × 23.9 mm
  • Operating Voltage:  5.0[V] (3.7~6.0 [V])
  • Operating Range:  300 [deg]
  • Communication:    TTL half-duplex communication / PWM.

For dimensions and mounting hole locations, please refer to the user manual.

icon_pdf.gifRS204MD User Manual (ver. 1.05) (2.36 MB)

Outline Data

Compact, lightweight servo with plastic gears

This is the smallest servo in the series, with a 40% reduction in volume compared with the RS304MD, while also allowing daisy-chain connection via ADH connectors. Communication functions support the command-controlled and PWM control methods common to the RS series. This makes it well suited for use in small communication robots and as a compact actuator in IoT applications.

Options

Linkage parts are available for easy mounting to frames and for creating orthogonal two-axis joints.
By attaching a free horn, a dual-shaft support structure can also be achieved.

  • Bracket Set for Mounting

     BS3468 BRACKET SET RS204MD: Bracket mounting set
     6 brackets, 20 tapping screws (1.2 × 5), 20 washers for 1.2 mm screws, and 20 tapping screws (2 × 8)

  • Terminal Boxes

     BS3476 TERMINAL BOARD TB41AD: ADH terminal relay board for TTL command-controlled servos (4 ports)
     BA2082 TB-RV71EH-7.4V/3W: EH terminal box with power switch for TTL command-controlled servos (7 ports)
     BC0079 TB-RV71EH POWER CABLE: Cable with power supply connector for TB-RV71EH
     BS3308 TB-EH41EH-300: EH terminal box for TTL command-controlled servos (4 ports)
     BB0132 TB22PP: Terminal box for servo connectors (4 ports)

  • Cables with Connectors

     BB1182 SERVO CABLE AD-RC B 150: Servo connector conversion cable, 150 mm
     BB1183 SERVO CABLE AD-RC B 300: Servo connector conversion cable, 300 mm
     BB1184 SERVO CABLE AD-EH B 150: EH connector conversion cable, 150 mm
     BB1185 SERVO CABLE AD-EH B 300: EH connector conversion cable, 300 mm
     BB1186 SERVO CABLE AD-AD B 70: Cable for ADH connectors, 70 mm
     BB1187 SERVO CABLE AD-AD B 150: Cable for ADH connectors, 150 mm
     BB1188 SERVO CABLE AD-AD B 300: Cable for ADH connectors, 300 mm
     BB1189 SERVO CABLE AD-C B 300: Cable without connector on one end, 300 mm

  • Mounting Screws

     BS3471 TAPPING SCREW 1.2X3.5: Tapping screw, nominal diameter 1.2 mm × L3.5 mm (30 pcs.)
     BS3472 TAPPING SCREW 1.2X5: Tapping screw, nominal diameter 1.2 mm × L5 mm (30 pcs.)
     BS3473 TAPPING SCREW 1.2X6: Tapping screw, nominal diameter 1.2 mm × L6 mm (30 pcs.)
     BS3474 TAPPING SCREW 1.2X8: Tapping screw, nominal diameter 1.2 mm × L8 mm (30 pcs.)
     BS3475 PLANE WASHER 1.2X2.8: Plain washer for 1.2 mm tapping screws

  • Replacement Parts

     BS3470 CASE SET RS204MD: Replacement case parts set including upper, middle, and bottom cases
     BS3469 GEAR SET RS204MD: Replacement gear parts set including gears, shaft, and bearings
     BS3477 GREASE MULTIPURPOSE: Multipurpose grease, 8 g; approximately 0.05 g per unit is suitable for the RS204MD gear box

  • Servo Horns

     BS0532 RS302_304 SCREW 2x8: Horn fixing screws for RS302CD / RS304MD / RS204MD (10 pcs.)
     BS3354 ROBOT SERVO HORN RH01: Common servo horn for RS3xx / RS2xx series (5 pcs.)
     BS0168 RS30x FREE HORN SET: Common free horn set for RS3xx / RS2xx series (5 pcs.)

  • Servo Horns for RS2xx / RS3xx Series

    Futaba servo horns for R/C servos (Types A to K) and servo horns for the RS3xx series can also be attached.
    * For details, please refer to the user manual.