Xpert RC SI-4531

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*Based on known specs.

Technical Specifications

Last Updated: 2026-10-10

Identity
Brand
Product Number	SI-4531
Category	Hobby
Performance
Torque	6.6V 290.30 oz-in 6.0V 263.91 oz-in 4.8V 211.13 oz-in Average
Speed	6.6V 0.09 sec/60° 6.0V 0.10 sec/60° 4.8V 0.12 sec/60° Above Average
Physical
Weight	2.20 ozAverage
Dimensions	L 1.575 in W 0.787 in H 1.488 in
Case Material	Aluminum
Drivetrain
Motor Type	Brushless
Gears	Metal
Control & Signal
Neutral Position	1520 µs
Refresh Rate	333 Hz
Control System	PWM
Electrical & Environment
Operating Voltage	4.8–6.6 V
Origin
Country of Origin	USA

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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.

Compatible Hardware

Amazon eBay

*Based on known specs.

Class Comparison

Torque	Average Stronger than 56% of 1294 Standard servos at 4.8V
Speed	Above Average Faster than 66% of 1290 Standard servos at 4.8V
Weight	Average Lighter than 41% of 2538 Standard servos

Performance Analysis

Shaft Power	3.25–5.96 W
Power Density	3.234 W/in³ More power-dense than 26% of 32 Xpert RC servos
Torque Density	3.3781 oz-in/g Stronger than 63% of 25 Xpert RC servos
Torque-to-Volume Ratio	114.47 oz-in/in³ Denser torque than 58% of 27 Xpert RC servos
Speed-to-Weight	0.13333 (1/sec·g) Faster than 8% of 25 Xpert RC servos
Speed-Torque Trade-off	25.34 Better balanced than 81% of 27 Xpert RC servos
Torque Gain per Volt	20.83%/V More voltage-responsive (torque) than 73% of 27 Xpert RC servos
Speed Gain per Volt	18.52%/V More voltage-responsive (speed) than 73% of 27 Xpert RC servos
Voltage Range Width	1.8 V Wider voltage range than 23% of 32 Xpert RC servos