Associated Electronics S1903 Servo

Specifications

Source: Most data comes from the manufacturer but some data is sourced from our loyal community.

Last Updated:	2025-08-03
Modulation:	(add)
Torque:	6.0V: 41.70 oz-in (3.00 kg-cm)
Speed:	6.0V: 0.19 sec/60°
Weight:	1.64 oz (46.5 g)
Dimensions:	Length:1.59 in (40.4 mm) Width:0.79 in (20.1 mm) Height:1.49 in (37.8 mm)
Motor Type:	(add)
Gear Type:	Plastic
Rotation/Support:	Bushing
Rotational Range:	(add)
Pulse Cycle:	(add)
Pulse Width:	(add)
Connector Type:	(add)

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The discontinued Associated Electronics S1903 is a reliable and versatile standard analog servo that serves as a dependable workhorse for a wide variety of general-purpose RC applications. It is an excellent choice for entry-level RC cars, boats, and airplanes, where it can be used for throttle and steering control, as well as actuating auxiliary functions. The S1903's design prioritizes reliability and affordability, making it a go-to choice for hobbyists who need a solid, no-frills performer for their everyday RC adventures. Its standard size and universal connector make it a convenient drop-in replacement for many stock RTR servos, offering a simple and budget-friendly way to get a model back up and running.
The S1903 is built around a proven 3-pole motor and a durable nylon gear train, a time-tested combination that provides a good balance of performance and longevity for light to moderate-duty applications. While it may not offer the blistering speed or immense torque of a high-end digital servo, its smooth and predictable response is more than adequate for many common tasks. For the aspiring robotics enthusiast or student, the S1903 is an excellent choice for experimenting with the fundamentals of robotic actuation, providing a low-cost platform for learning the basics of servo control. The Associated Electronics S1903 is a testament to the enduring value of simplicity, offering a straightforward and reliable solution for a multitude of RC and robotics projects.