Description
The Fanuc A20B-3900-0166 is a FROM/SRAM memory module with 64MB FROM and 1MB SRAM for Fanuc Series 30i/31i/32i-Model A control units. The FROM (flash) stores the CNC system and user software, while the battery-backed SRAM holds part programs, parameters and offsets. SRAM data is lost if the module is swapped without backup — take a full backup first. Interchangeable with A20B-3900-0226.
- Part number: A20B-3900-0166
- Series: Fanuc 30i/31i/32i-Model A
- FROM: 64MB
- SRAM: 1MB
- Alternate part: A20B-3900-0226
- Availability: New, used and refurbished — tested before dispatch
Need this part? Get a quote today.
Call or WhatsApp +91 88022 12394 — we ship across India and worldwide. Repair and exchange options are also available for Fanuc control units.