Servo Specs, Reviews, & Comparison Tool
Blue Bird BMS-303JST - Micro Servo
Specifications
| Last Updated: | 2025-08-04 |
| Modulation: | Analog |
| Torque: |
4.8V: 11.00 oz-in (0.79 kg-cm) |
| Speed: |
4.8V: 0.11 sec/60° |
| Weight: | 0.12 oz (3.4 g) |
| Dimensions: |
Length:0.75 in (19.1 mm) Width:0.29 in (7.4 mm) Height:0.61 in (15.5 mm) |
| Motor Type: | Coreless |
| Gear Type: | Plastic |
| Rotation/Support: | (add) |
| Rotational Range: | (add) |
| Pulse Cycle: | (add) |
| Pulse Width: | (add) |
| Connector Type: | JST |
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Notes
- The discontinued Blue Bird BMS-303JST is a thoughtful and practical variant of the classic pico-class analog servo, tailored specifically for ease of use with a particular set of popular electronics. Its core performance is that of the reliable and lightweight BMS-303, offering smooth and dependable control for a wide range of indoor and micro aircraft. The key distinguishing feature, as indicated by its name, is that it comes pre-fitted with a JST-ZHR (1.5mm pitch) connector. This is the standard connector type used on many popular micro-class receivers from brands like Spektrum, Futaba, and others. This seemingly small detail is a significant convenience for builders.
- The primary value of the BMS-303JST is that it offers a true "plug-and-play" solution, eliminating a common point of frustration for builders of micro models. Without it, a hobbyist would have to either purchase a separate adapter cable or, more often, perform a delicate soldering job to cut off the existing connector and attach the correct JST plug. This can be a challenging task with such small wires and adds time and potential points of failure to a build. The BMS-303JST saves time, reduces hassle, and ensures a clean, reliable connection right out of the box.
- For educators, students, or anyone developing a robotics kit based on a microcontroller or receiver that uses the JST-ZHR standard, the BMS-303JST is an excellent choice. It simplifies the bill of materials and the assembly process, allowing users to get their projects up and running more quickly and with less chance of wiring errors. It is a small but intelligent product variation that demonstrates a keen understanding of the needs of the modern builder, whether they are constructing a tiny airplane or a miniature robot.
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