The LV839479: The drawout mounting mode (cite:) means this terminal block is not for fixed-mounted breaker cells — it mates with the chassis-mounted cradle that accepts the moving breaker element. The 3-wire PTE+SDE2/RES configuration (cite:) covers the three control and indication circuits: PTE (electrical closing command), SDE2 (fault-signal contact), and RES (reset input). If your BOM calls for a 4-wire or 6-wire terminal block for additional aux contacts or shunt trip wiring, this part will not match the pinout.
The lifecycle stage is listed as current (cite:), so no last-time-buy or end-of-life notice applies to this order code as of the latest manufacturer record. No official successor has been published, which is consistent with an active-line accessory.