Discover XQ-Power Servos in Our eBay Store!
Shop Now
Technical Specifications
Last Updated: 2026-07-28Identity
Performance
Physical
Drivetrain
Control & Signal
Electrical & Environment
Connectivity
Origin
Preferences are saved automatically.
| Identity | |
| Brand |  |
| Product Number | HD-1900A |
| Category | Hobby |
| Performance | |
| Torque |
6.0V
16.70 oz-in
1.20 kg-cm
0.1 N-m
4.8V
20.80 oz-in
1.50 kg-cm
0.1 N-m
|
| Speed |
6.0V
0.08 sec/60°
750.0 deg/s
125.0 RPM
4.8V
0.11 sec/60°
545.5 deg/s
90.9 RPM
|
| Running Current | (add) |
| Stall Current | (add) |
| Physical | |
| Weight | 0.32 oz9.0 g |
| Dimensions |
L 0.91 in W 0.48 in H 1.14 in L 23.1 mm W 12.2 mm H 29.0 mm |
| Case Material | (add) |
| Drivetrain | |
| Motor Type | (add) |
| Motor Drive | (add) |
| Gears | Plastic |
| Gear Spline/Teeth | 25 T estimate |
| Shaft Size | (add) |
| Rotation Mode | (add) |
| Rotation/Support | Bushing |
| Backlash | (add) |
| Control & Signal | |
| Modulation | Analog |
| Direction | (add) |
| Rotational Range | (add) |
| Mechanical Limit | (add) |
| Pulse Cycle | (add) |
| Pulse Width | (add) |
| Neutral Position | 1520 µs |
| Dead Band | (add) |
| Refresh Rate | 50 Hz |
| Angle Sensor | (add) |
| Control System | (add) |
| Programmable | (add) |
| Signal Voltage | (add) |
| Electrical & Environment | |
| Operating Voltage | 4.8–6 V |
| Power Source | (add) |
| Regulator Type | (add) |
| Temperature | -10–60 °C14–140 °F |
| Water Rating | (add) |
| Certification | (add) |
| Idle Current | (add) |
| Connectivity | |
| Connector | JR (Universal) estimate |
| Wire Length | (add) |
| Origin | |
| Country of Origin | Hong Kong |
Disclaimer: Most data is sourced from the manufacturer. Some data is sourced from our loyal community and with the help of AI. We aim for accuracy but are not responsible for inaccurate information.
Performance Analysis
| Shaft Power | 0.35–0.39 W |
| Torque Density | 2.3111 oz-in/g Stronger than 77% of the 67 Analog Mini servos in the database |
| Torque-to-Volume Ratio | 41.77 oz-in/in³ Denser torque than 24% of the 67 Analog Mini servos in the database |
| Power Density | 0.775 W/in³ More power-dense than 48% of the 166 Analog Mini servos in the database |
| Speed-to-Weight | 1.01010 (1/sec·g) 4th-highest speed-to-weight of 67 Analog Mini servos |
| Speed-Torque Trade-off | 2.29 Better balanced than 11% of the 67 Analog Mini servos in the database |
| Torque Gain per Volt | -16.43%/V More voltage-responsive (torque) than 0% of the 46 Analog Mini servos in the database |
| Speed Gain per Volt | 31.24%/V 1st-highest speed gain per volt of 47 Analog Mini servos |
| Voltage Range Width | 1.2 V Wider voltage range than 68% of the 77 Analog Mini servos in the database |
Quick Actions
Similar Active Servos
Reviews (2)
-
Rex
December 17, 2024Application(s):
Comments: (From hobbyking.com) Very reliable for me. I have a set in a CTH Scythe I fly almost every day for 2 yrs now, 2-5 batteries a day 7min each and these servos are still working through 100's of crashes! I really can't believe they are still going. I have other planes with them and they are going great also. Great servo at a great price
Gramp
September 23, 2017Application(s): Swarm
Comments: This company has the worst datasheets in the world