Based on this product's specifications, here are some alternatives and similar models
Circuit Breaker Legrand Tx3 C20A 1‑pole 6 kA 1M (403435)
Summary description:
Legrand Tx3 C20A is a single‑pole miniature circuit breaker (1M) rated C‑characteristic with 20 A nominal current and 6 kA breaking capacity. Designed for overcurrent and short‑circuit protection in residential and light commercial electrical installations, it fits standard DIN‑rail mounting and protects individual circuits such as lighting and socket circuits.