Based on this product's specifications, here are some alternatives and similar models
Siemens 5ST3615 3-Phase Busbar 10mm² Pin-Type 12-Module
Summary description:
The Siemens 5ST3615 is a 3-phase pin-type busbar designed for efficient electrical distribution in modular installations. With a cross-section of 10mm² and a capacity of 12 modules, this fully insulated busbar ensures reliable connectivity and safety in distribution boards. It is an essential component for professional electrical wiring, providing a clean and organized layout for circuit breakers and other modular devices.