MM-C1219-045B

Coreless brushed DC motor winding on the C1219 body, ⌀12 mm by 18.5 mm, rated 4.5 V.

Class: Coreless brushed DC
Lifecycle: active
Revision: A
Review: Verified record
Sample: Quoted with the configuration
Lead time: Quoted with the configuration
Verified: 2026-08-18

Envelope and model

Side elevation of the C1219 body, drawn to scale from the published envelope: ⌀12.0 mm by 18.5 mm. Every winding on this platform shares it. Shaft, flats, lead exit, mounting face and tolerances are governed by the controlled drawing.

Model bounding box, X × Y × Z: 12.0 mm × 12.0 mm × 21.1 mm
Model revision: A, reviewed 2026-08-18
Mesh: 6,376 triangles

Reviewed specifications

The full electrical record for this winding.

MM-C1219-045B specifications
Specification	Value	Basis	Note
Motor class	Coreless brushed DC	Published
Envelope diameter	12mm	Published
Body length	18.5mm	Published
Mass	10.4g	Published
Rated voltage	4.5V	Published
Rated output power	0.35W	Published
Rated torque	0.441mN·m	Published
Rated speed	7,520rpm	Published
Rated current	108mA	Published
No-load speed	9,700rpm	Published
No-load current	9mA	Published
Stall torque	1.96mN·m	Published
Stall current	457mA	Published
Torque constant	4.289mN·m/A	Calculated	Derived from the published stall torque and stall current pair.
Commutator segments	5	Published

P = T × ω = 0.44 mN·m × 7,520 rpm = 0.35 W

P: mechanical output power at the rated point
T: rated torque
ω: rated speed, converted to radians per second

The published rated output is 0.35 W. The two agree to rounding; where they differ, the published value governs.

The winding's line, before reduction.

The same relationship at the motor shaft, where the numbers are published rather than carried through a gearhead.

Linear torque-speed approximation for MM-C1219-045B at 4.5 V, from the published no-load speed (9,700 rpm) to the published stall torque (1.96 mN·m). Both endpoints are published values; the line between them is a construction, not a measured curve.

The same line as numbers
Output torque mN·m	Output speed rpm	Point
0.000	9,700	No load
0.441	7,520	Rated continuous point
0.490	7,275	Linear interpolation
0.980	4,850	Linear interpolation
1.470	2,425	Linear interpolation
1.960	0	Stall of the winding

Compatible parts

Other windings in the same body

Windings on C1219
SKU	Rated voltage V	No-load speed rpm	Rated torque mN·m	Stall torque mN·m	Rated current mA
MM-C1219-030A	3.0	6,710	0.157	1.43	45
MM-C1219-030B	3.0	10,400	0.196	1.04	83
MM-C1219-045A	4.5	8,740	0.29	1.58	67
MM-C1219-060A	6.0	8,990	0.196	1.3	33
MM-C1219-120A	12.0	8,480	0.245	1.67	21
MM-C1219-120B	12.0	13,600	0.245	1.6	40
MM-C1219-120C	12.0	16,300	0.245	1.57	42

Application fit and cautions

Read out of this record's own numbers.

At its rated point this winding delivers 0.441mN·m at 7,520rpm. That is 0.35 W of mechanical output. Direct drive at that speed suits fans, drums and light continuous rotation; anything that has to hold or position a load needs a reduction, and the gearheads with a reviewed fit are listed above.

Documents, models and next steps

Free and ungated

This specification record is free to read, index and quote, with no form in front of it. You should not have to trade personal data for enough information to reject a product.

A sanitized browser model (GLB, revision A, reviewed 2026-08-18) is published for this envelope: Download the GLB model

Not published yet

A 2D PDF drawing, a DXF and a neutral STEP file are not published for this record today, so there is no link here to a file that does not exist. A configured drawing carries tolerances and interface dimensions we will stand behind, which is why it comes out of a short qualified request rather than a download button.

Request a configured drawing

Record MM-C1219-045B, revision A, verified by Micro Motion application engineering on 2026-08-18. Catalog 2026-08-18.public.1.