Based on this product's specifications, here are some alternatives and similar models
Siemens 5ST3624 3-Phase Busbar 10mm2 11-Module Pin-Type for RCCB
Summary description:
The Siemens 5ST3624 is a 3-phase pin-type busbar designed for efficient electrical distribution. With a cross-section of 10mm2 and an 11-module capacity, this fully insulated busbar is specifically engineered for use with 3+N RCCBs where the neutral is positioned on the right. It ensures reliable connectivity and safety in modular distribution boards, facilitating professional installation in industrial and residential electrical systems.