Ratings that govern the fit
The E2E-X40MB1DL30-M1TJR 0.3M: The PNP-NO output dictates which PLC input card this sensor mates to — sourcing outputs require a sinking input module. If your BOM pulls NPN, this is not a pin-swap fix. The 40 mm sensing distance is rated for an unshielded M30 barrel; unshielded means the active face can be flush with the mounting metal, but the sensing field emerges only from the tip, so targets must approach axially within the rated range.
How this compares to a close sibling
The closest BOM cross-shop candidate is the E2E-X50MC2L30 2M. Both are M30 unshielded sensors from the same E2E NEXT series, share IP69K and the 10–30 V supply. The critical difference: the sibling is NPN-NC, not PNP-NO. If your panel is wired for PNP sourcing, the E2E-X50MC2L30 2M requires a wiring change — either a logic inverter at the PLC input or a relay interface. The other peer, E2E-X18MC2L30-M1, has a wider temperature range (-40°C to 85°C) but only 18 mm sensing distance; it is NPN-NC and connector-only (no cable). Neither is a direct replacement for the E2E-X40MB1DL30-M1TJR 0.3M without altering the output polarity or mounting clearance.