Overview
The 6ES7403-1JA01-0AA0 is a Siemens SIMATIC S7-400 extension rack ER2 with 9 slots, supporting P-bus communication and accepting up to two redundant power supplies for signal modules only.
Lifecycle and sourcing
Siemens phased out the 6ES7403-1JA01-0AA0 effective 2025-10-01. No official successor is listed; remaining units are sourced via surplus and broker channels. For a line-down or last-time-buy decision, an RFQ confirms available quantity and lead time from our multi-source network.