The Hirschmann MSP40-20-3A, configurator code MSP40-00200SCY9MRHHE3A, is a modular full Gigabit Ethernet industrial DIN rail switch from the MSP40 family running HiOS Layer 3 Advanced software, designed for automation engineers and network architects who need wire-speed Layer 3 routing combined with comprehensive industrial switching in a single compact DIN rail device. Manufactured by Hirschmann, a Belden brand, the MSP40-20-3A provides 16 Gigabit Ethernet ports, four 2.5 Gigabit ports, and two 10 Gigabit uplink ports in a fanless design consuming just 19 W from a 24 V DC supply and operating between 0 °C and +60 °C. The Layer 3 routing engine supports OSPFv2, RIPv1/v2, static unicast routing with ECMP, Proxy ARP, full wire-speed routing across VLAN-based and port-based router interfaces, and VRRP with HiVRRP enhancements and tracking for gateway redundancy. Multicast routing covers DVMRP, PIM-DM, PIM-SM/SSM, and IGMP proxy for demanding multicast-heavy automation and broadcast applications. Switching features include QinQ, DiffServ ingress and egress classification, IGMP Snooping per VLAN v1/v2/v3, QoS to 802.1D/p, and Voice VLAN. Redundancy is handled by HIPER-Ring, MRP per IEC 62439-2 as client and manager, RSTP, MSTP, LACP, and Sub Ring Manager. Security includes 802.1X, RADIUS, TACACS+, DHCP Snooping, Dynamic ARP Inspection, IP Source Guard, LDAP, and signed firmware images. Industrial profiles cover PROFINET, EtherNet/IP, Modbus TCP, and IEC 61850, while management is available via SNMP v1/v2/v3, HTTPS, SSH, OPC-UA Server, and CLI. Certified CE, FCC, cUL508, and NEMA TS2, the MSP40-20-3A is well suited to complex industrial automation networks, smart grid substations, process plants, and transport infrastructure. Available from Recab, your Nordic partner for Hirschmann industrial switch solutions.