Specification
| General | Mechanical | ||
| resolution(bit) | 15-17 | outer/inner /height (mm) | 20/4/6.5 |
| maximum static error | ±0.05° | allowable mounting eccentricity (mm) | ±0.1 |
| repetitive error(lsb) | ±2 | allowable axial mounting tolerance (mm) | 0.6±0.1 |
| maximum operational speed(rpm) | 4000 | rotor inertia (kg·mm2) | 0.01 |
| measurement range | single turn | weight(g) | 4 |
| rotation direction | adjustable cw/ccw | material (stator/rotor) | FR-4 |
| Environmental | Electrical | ||
| emc | iec 61000-6-2 iec 61000-6-4 | supply voltage | 5v |
| operating temperature | -40℃-+125℃ | current consumption | <80ma |
| storage temperature | -50℃-+100℃ | serial output | 6-pin connector 6-core cable |
| relative humidity | 0-99% | communication | ssi/biss-c/rs-422/rs-485 |
shock endurance/ functional | 100g/11ms | ||
| vibration functional | 20g(10-2000hz) | ||
| protection | ip 40 | ||
Drawing
Ordering Code
B:biss-c interface/S:ssi interface
R:rs-422 serial interface/E:rs-485
05: 5V (default)
12: 12V
24: 24V
01:-30°C~+85°C(efault)
02:-40°C~+125°C
15:15-bit(32768)
17:17-bit(131072)
18:18-bit(262144)
19:19-bit(524288)
20:20-bit(1048576)
21:21-bit(2097152)
22:22-bit(4194304)
A: Single-turn absolute
60: Outer diameter 60mm
25: Inner diameter 25mm
C: single absolute encoder
D: Upper/lower dual absolute encoder
DP: Inner/outer dual absolute encoder
Illustrated by example
C–25–60–A–19–01–05–S indicates a C-series single-turn absolute encoder with a 25 mm bore diameter and 60 mm outer diameter. “19” denotes 19-bit single-turn absolute resolution. The operating temperature range is −40 °C to ~+125 °C, the power supply is 5~30 V, and the output communication protocol is SSI.
D–21–58–A–19–02–05–E indicates a D-series absolute dual encoder with a 21 mm bore diameter and 58 mm outer diameter. “19” denotes 19-bit single-turn absolute resolution. The operating temperature range is −40 °C ~ +125 °C, the power supply is 5 V, and the output communication protocol is RS-485.
DP–20–50–A–19–02–05–E indicates a DP-series absolute dual encoder with a 20 mm bore diameter and 50 mm outer diameter. “19” denotes 19-bit single-turn absolute resolution. The operating temperature range is −40 °C ~ +125 °C, the power supply is 5 V, and the output communication protocol is RS-485.
Case studies (Customized frameless motors developed with our clients)
Additional Info
With a compact, hollow shaft design, it integrates easily into a wide range of systems, including direct drive motors, slip rings, and cable-through applications—without the need for complex installation or tight mechanical tolerances.
Supporting BiSS, SSI, and UART interfaces and offering up to 20-bit resolution, C0420 delivers both flexibility and precision. Custom solutions are also available to match your exact needs.
Ideal for robotics, medical devices, automation, aerospace, and more, C0420 helps engineers build smarter, more efficient systems across industries.
Features & Benefits:
✔️Non-contact
✔️Hollow shaft
✔️Compact Design
✔️High Precision
✔️Absolute Value
✔️Low Power Consumption
✔️Maintenance-free
✔️Coupling-free
✔️Easy Installation
✔️Anti-magnetic Interference
✔️Vibration and Shock ResistantV
✔️Customizable
Download
C0420 Inductive Rotary Absolute Encoders Datasheet.pdf
OD: 20mm|Height: 6.5mm
Frequently bought together - Magnetic encoders
Direct drives need high-quality position signals to ensure optimal performance. Perfect measuring signals can enhance the surface quality of machined workpieces, reduce the machine frame's vibrations, minimize velocity-dependent motor noise, and prevent excessive heat generation in the motor.
Mosrac recommends using a magnetic encoder to enhance the accuracy, speed stability, and thermal behavior of direct drive axes. Because there is no mechanical transmission between the encoder and the feed unit, the position signals are not susceptible to inaccuracies or delays.
Custom combinations are available on request and contact us.
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