Discover XQ-Power Servos in Our eBay Store!
Shop Now
Technical Specifications
Last Updated: 2026-10-10
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | BMS-308BB |
| Category | Hobby |
| Discontinued | Yes |
| Performance | |
| Torque |
4.8V17.00 oz-in1.22 kg-cm0.1 N-m |
| Speed |
4.8V0.10 sec/60°600.0 deg/s100.0 RPM |
| Stall Current | ≤0.32 A≤320 mATop 10% |
| Physical | |
| Weight | 0.22 oz6.2 gAbove Average |
| Dimensions |
L 0.94 in W 0.40 in H 0.90 in L 23.9 mm W 10.2 mm H 22.9 mm |
| Drivetrain | |
| Motor Type | 3-pole |
| Gears | Nylon |
| Gear Spline/Teeth | 25 T estimate |
| Rotation/Support | Single Bearing |
| Control & Signal | |
| Modulation | Analog |
| Pulse Width | 1200-1600 µs |
| Neutral Position | 1520 µs |
| Dead Band | 6 µs |
| Refresh Rate | 125 Hz |
| Electrical & Environment | |
| Operating Voltage | 4.5–5.5 V |
| Power Source | Ni-MH / Ni-CD |
| Temperature | -20–60 °C-4–140 °F |
| Idle Current | 0.005 A5 mA |
| Connectivity | |
| Connector | JR (Universal) estimate |
| Wire Length | 160 mm6.3 in |
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.
Class Comparison
| Weight | Above Average Lighter than 66% of 346 Analog Micro servos |
| Stall Current | Top 10% Lower draw than 98% of 54 Analog Micro servos |
Performance Analysis
| Shaft Power | 0.31 W |
| Power Density | 0.929 W/in³ More power-dense than 57% of 333 Analog Micro servos |
| Torque Density | 2.7419 oz-in/g |
| Torque-to-Volume Ratio | 50.24 oz-in/in³ |
| Speed-to-Weight | 1.61290 (1/sec·g) |
| Speed-Torque Trade-off | 1.70 |
| Current-per-Torque Ratio | 0.0188 A/oz-in |
| Voltage Range Width | 1.0 V Wider voltage range than 10% of 182 Analog Micro servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0150 Finer dead band than 5% of 43 Analog Micro servos |
Similar Active Servos
Reviews of Blue Bird BMS-308BB
Be the first to review!