Please review the manufacturer datasheets for these products before using them as replacements, you should always verify that the specifications are appropriate for your application before using a recommended product.
The SSLM1D23BD from Schneider Electric was discontinued some years ago, but we periodically get requests for it. For now, the best replacement option on our site is Sensata-Crydom DR06D03 (DigiKey# CC2068-ND). It’s not a direct cross-reference item, but it is a decent alternative.
For reference, the original Schneider part’s specifications and datasheet can be found on the manufacturer website, here: https://www.se.com/us/en/product/SSLM1D23BD/harmony-solid-state-relay-3-a-din-rail-mount-input-4-28-v-dc-output-5-60-v-dc-1-no/