Home Brushless Motors 712-300


Slotless (inrunner) Ø12 x 30mm / with dual shafts / sensorless


Key Features

Model No.   712-300
Motor Type   Inrunner [Slotless]
Diameter   mm 12
Length   mm 30
Voltage   V 9
No-load Current   A 0.15
No-load Speed   rpm 24780
Stall Torque   mNm 16.89
Stall Current   A 5.03
Nominal Torque   mNm 3.05
Nominal Speed   rpm 20170
Nominal Current   A 0.91
Sensor Commutation   Sensorless
Sample Available   No

Performance characteristics

Nominal voltage V 9
No load speed rpm 24780
No load current A 0.15
Nominal speed rpm 20170
Nominal torque mNm 3.05
Nominal current A 0.91
Stall torque mNm 16.89
Stall current A 5.03
Maximum efficiency % 73.4

Design and accessories

Availability 8 weeks
Motor Type Brushless
Commutation Sensored / sensorless
Shafts Dual
Encoder Not fitted
Gearbox Not fitted
Connections Tinned
Cable 100mm x AWG28
Housing Material Aluminium alloy
Body diameter mm 12
Body length mm 30
Weight g 16.3

Motor body characteristics

Thermal resistance housing-ambient °C/W 28.4
Thermal resistance winding-housing °C/W 7.1
Thermal resistance winding-housing s 4
Thermal time constant motor s 240
Ambient temperature min °C -30
max °C +100
Max. permissable winding temperature °C +125
Max. permissable rotor speed rpm 50 000
Axial play at axial load < 0.8N mm 0.0
< 0.8N mm 0.3 max
Radial play Preloaded
Max. axial load (dynamic) N 0.3
Max. force for press fits (static) N 11.0
with shaft supported N 200.0
Max. radial loading (5mm from flange) N 4.3
Number of pole pairs 1
Number of winding phases 3

Winding specific characteristics

Terminal resistance Ω 1.79
Terminal inductance mH 0.04
Torque constant (Kt) mNm/A 3.36
Speed constant (Kv) rpm/V 2 840
Speed / torque gradient rpm/mNm 1 512
Mechanical time constant ms 5.1
Rotor inertia mNm² 0.032

Operating range (based on on ambient 25°C)

For each motor frame size (diameter / length), we present the operating range diagram that relates to the winding of the stock sampleable part. The part number of the stock sampleable part is shown in the diagram below, and the product page of the stock sampleable part, can be found in the ‘related products’ section towards the bottom of the page.

Sample request

We aim to get you up and prototyping as quickly as possible. We stock off-the-shelf samples for each motor size, to support commercial development.

Our application engineers can advise on motor design and selection, mechanism design, and support the development of high performance motor drivers. They can also assist to validate the in-application performance and longevity suitability of a down-selected motor or mechanism design.

Contact our application engineering team to discuss your project, using the form, or email [email protected].

Related products

Export Data
Product Image Product name Motor Type Diameter (mm) Length (mm) Voltage (V) No-load Current (A) No-load Speed (rpm) Stall Torque (mNm) Stall Current (A) Nominal Torque (mNm) Nominal Speed (rpm) Nominal Current (A) Sensor Commutation
712-401 Image 712-401 | Inrunner [Slotless]
Download Datasheet
Inrunner [Slotless] 12 30 12 0.11 24675 17.02 3.77 3.13 3.13 0.70 Sensorless Request a sample
712-202 Image 712-202 | Inrunner [Slotless]
Download Datasheet
Inrunner [Slotless] 12 30 6 0.20 25070 16.65 7.5 3.21 20150 1.45 Sensorless Enquire

Technical Documents