Based on this product's specifications, here are some alternatives and similar models
Circuit breaker busbar Rittal SV 3418.040, 400 V, 63 A, 41×251 mm
Summary description:
Rittal SV 3418.040 is a circuit breaker busbar rated for 400 V and 63 A with dimensions 41 mm (width) × 251 mm (height). Designed for mounting in electrical enclosures and switchgear, it provides reliable power distribution and connection for protective devices. Suitable for industrial and commercial panel installations requiring compact busbar solutions.