Mitsubishi A1SX20 — Digital I/O Expansion Module

Part number	A1SX20
Brand	Mitsubishi
Description	Digital I/O Expansion Module
Manufacturer	Mitsubishi
Product Type	Digital I/O Expansion Module
Product Line	A Series
Part Number	A1SX20
Weight	0.69 lbs (0.31 kg)
Output Voltage Range	24V DC
Input Current	7.5 mA per point (typical)
Output Current	0.5 A per point (typical)
Isolation	Electrical isolation between input/output and PLC
Response Time	10 ms (typical) for inputs
Mounting Type	DIN rail or direct mounting
Number of I/O Points	16 input points / 16 output points
Input Type	Digital (discrete) inputs
Output Type	Digital (discrete) outputs
Input Voltage Range	24V DC

The A1SX20 is a digital I/O expansion module manufactured by Mitsubishi within the A Series lineup. It operates at an output voltage range of 24 volts DC, facilitating efficient integration within control systems.

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.