The Kpower P0043 is a 4.3 g analog coreless micro servo for RC aircraft, hand-launch gliders, small drones and miniature mechanisms. Its 19.8 × 8.2 × 24.3 mm body fits space-constrained projects, while PWM control supports position-command integration. Operating from 4.8–8.4 V, it delivers 0.8 kg·cm stall torque at 4.8 V or 0.9 kg·cm at 6.0 V, with voltage-dependent no-load speed.
Features
Compact construction: translucent plastic housing with mounting tabs and holes for installation in small assemblies.
Analog coreless drive: a coreless motor with potentiometer position feedback.
POM plastic gearing: designed for smooth, stable movement, with dual ball bearings.
PWM control: 900–2100 µs pulse range and a 6 µs dead band.
Output connection: 20-tooth, 3.6 mm diameter horn spline and a 190 mm wire.
Travel: 120° ±5°; travel-angle customization is indicated.
Specifications
Voltage-Dependent Performance
Parameter
At 4.8 V
At 6.0 V
Stall torque
0.8 kg·cm
0.9 kg·cm
No-load speed
0.08 s/60°
0.07 s/60°
Mechanical and Electrical Specifications
Parameter
Value
Brand / model
Kpower P0043; housing marking WK-P0043
Servo type
Analog coreless micro servo
Rated torque
0.2 kg
Weight
4.3 g
Dimensions
19.8 × 8.2 × 24.3 mm (0.78 × 0.32 × 0.96 in)
Wire length
190 mm
Travel angle range
120° ±5°; customizable
Operating voltage
4.8–8.4 V
Horn gear spline
20T, Ø3.6 mm
Gear material
POM plastic
Motor
Coreless motor
Control protocol
PWM
No-load current
500 mA
Stall current
500 mA
Position sensor
Potentiometer
Case material
Plastic
Ball bearings
2BB; dual ball bearings
Working frequency
50–333 Hz
Dead band
6 µs
Pulse length range
900–2100 µs
Operating temperature
−10 to 50 °C
IP rating
IP42
Applications
RC airplane and hand-launch glider control linkages: the 4.3 g weight helps limit added mass in small airframes, while the compact body fits restricted installation spaces.
Small-drone and UAV mechanisms: use the miniature PWM actuator for position-controlled linkages where its dimensions, travel and voltage-conditioned torque suit the mechanism.
RC car models and STEAM car kits: build small steering or motion linkages using the horn spline and PWM position control.
Micro robots and multi-legged bionic robots: actuate miniature joints and linkages with a compact servo offering 120° ±5° travel.
Micro-toy DIY projects: add controlled movement to small mechanisms using the lightweight housing and mounting tabs.
Smart door-lock and wearable-device prototypes: integrate small moving mechanisms where the compact form and potentiometer-based position feedback are useful.
The servo carries the K-power brand and the model label WK-P0043. The P0043 micro servo weighs 4.3 g.
Features and Design
The P0043 micro servo weighs 4.3 g. The P0043 has a compact design intended for confined spaces.The P Series is described as a standard PWM servo series. The P Series is described as using low-noise plastic gears.P0043 is an analog coreless-motor servo. P0043 carries a 0.07 sec fast-speed-response claim without a voltage or travel angle specified in this graphic.
Specifications and Performance
The P0043 stall torque is 0.8 kg.cm at 4.8 V. The P0043 stall torque is 0.9 kg.cm at 6.0 V.P0043 torque is 0.8 kg.cm at 4.8 V. P0043 torque is 0.9 kg.cm at 6.0 V.
Application Examples
The P0043 is a sub-micro coreless servo. The P0043 is promoted for RC aircraft and RC car projects.P0043 has a stated weight of 4.3 g. P0043 lists multi-legged bionic robots as an application.P0043 lists R/C airplane models as an application. P0043 lists small drones as an application.
Options and Model Comparison
The P0043 torque is listed as 0.9 kg.cm, without a voltage condition in this table. The P0043 speed is listed as 0.07 s/60°, without a voltage condition in this table.