Brushless Motor B4S12-21XXDC Coreless

with Hall sensors Brushless Motor.

B4S12-21XX Specifications

    Brushless Motor B4S12-21XX02 Brushless Motor B4S12-21XX04
1 Nomal voltage 7.4 12.0 V
2 No load speed 22800 24300 rpm
3 No load current 100 70 mA
4 Stall torque 11.60 12.09 mNm
5 Stall current 3940 2700 mA
6 Output power 6.9 7.7 W
7 Max efficiency 71 70 %
8 Terminal resistance 1.88 4.44 Ω
9 Rated torque 1.83 1.60 mNm
10 Rated speed 19200 21100 rpm
11 Rated current 706 418 mA
12 Friction torque 0.30 0.32 mNm
13 Back-EMF constant 0.316 0.481 mV/rpm
14 Torque constant 3.02 4.59 mNm/A
15 Slope of N-T curve 1965 2009 rpm/mNm
16 Mechanical time constant 2.71 2.77 ms
17 Rotor inertia 0.12 0.12 gcm2
18 Max torque 5.80 6.05 mNm

Mechanical data

19 Shaft raddial play 0.015 mm
20 Shaft axial play 0.23 mm
21 Max shaft radial load 5(3.4mm*) N
22 Max shaft axial load 1 N
23 Max shaft axial load at standstill 10 N
24 Operating temperature -20~80
25 Max coil temperature 90
26 Weight 18 g

*measured at () mm from flange

Environmental data

#1

Coil U

Motor winding U
#2 Coil V Motor winding V
#3 Coil W Motor winding W
#4 Hall Vcc Input voltage 3∼5V
#5 Hall GND GND
#6 Hall u Hall sensor output U
#7 Hall v Hall sensor output V
#8 Hall w Hall sensor output W

Sensored version available as option.

B4S12-21XX

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