Spektrum S650

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*Based on known specs.

Technical Specifications

Last Updated: 2026-10-09

Identity
Brand
Product Number	SPMS650
Category	Hobby
Performance
Torque	6.0V82.00 oz-inBelow Average
Speed	6.0V0.12 sec/60°Average
Physical
Weight	1.76 ozAbove Average
Dimensions	L 1.58 in W 0.79 in H 1.55 in
Case Material	Plastic
Drivetrain
Motor Type	Brushed
Gears	Nylon
Gear Spline/Teeth	23 T
Rotation Mode	Positional
Rotation/Support	Dual Bearings
Control & Signal
Modulation	Digital
Rotational Range	120°
Control System	PWM
Electrical & Environment
Operating Voltage	6–6 V
Water Rating	Waterproof
Connectivity
Connector	JR (Universal) estimate
Wire Length	300 mm

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Compatible Hardware

Amazon eBay

*Based on known specs.

Class Comparison

Torque	Below Average Stronger than 13% of 1043 Digital Standard servos at 6.0V
Speed	Average Faster than 63% of 1041 Digital Standard servos at 6.0V
Weight	Above Average Lighter than 85% of 1902 Digital Standard servos

Performance Analysis

Shaft Power	1.26 W
Power Density	0.653 W/in³ More power-dense than 7% of 1759 Digital Standard servos
Torque Density	1.6400 oz-in/g Stronger than 13% of 1036 Digital Standard servos
Torque-to-Volume Ratio	42.38 oz-in/in³ Denser torque than 10% of 1042 Digital Standard servos
Speed-to-Weight	0.16667 (1/sec·g) Faster than 78% of 1033 Digital Standard servos
Speed-Torque Trade-off	9.84 Better balanced than 14% of 1031 Digital Standard servos
Voltage Range Width	0.0 V Wider voltage range than 1% of 1539 Digital Standard servos