Mitsubishi A3NCPUP21S3 — The A3NCPUP21S3 is a CPU module from Mitsubishi's A Series, designed for efficient control in sequence programming

Part number	A3NCPUP21S3
Brand	Mitsubishi
Category	PLC Processor
Description	The A3NCPUP21S3 is a CPU module from Mitsubishi's A Series, designed for efficient control in sequence programming
Manufacturer	Mitsubishi
Product Line	A Series
Part Number	A3NCPUP21S3
Weight	32.00 lbs (14.51 kg)
Module Type	CPU Module
Program Capacity for Sub-sequence Program	Max. 30k steps
Processing Speed (Sequence Instructions)	1.0-2.3 µs/step (direct mode), 1.0 µs/step (refresh mode)
5 VDC Internal Power Consumption	1.55A
Operating Temperature Range	0°C to 55°C
Control System	Sequence Program Method
Selectable I/O Control Mode	Refresh/Direct Method
Programming Language	Language Dedicated for Sequence Control (Relay Symbol, Logic Symbolic Language)
I/O Points	2048 points
Allowable Momentary Power Interruption Time for the System	20 ms or less
Memory Capacity	Max. 448k bytes
Program Capacity for Main Sequence Program	Max. 30k steps

The A3NCPUP21S3 is a CPU module from Mitsubishi's A Series, designed for efficient control in sequence programming. This module supports a maximum of 30,000 steps for both main and sub-sequence programs, along with a processing speed that varies based on the mode used.

Compatibility data for this part number is being verified. Send an RFQ with your equipment model and serial — our suppliers confirm fitment before quoting.

Data compiled from 1 verified source. Last reviewed 2026-08-16.