Siemens 6EP4437-7FB00-3DX0 SITOP SEL1200 8-Channel 24V 40A Selectivity Module

The Siemens SITOP SEL1200 6EP4437-7FB00-3DX0 is an 8-channel selectivity module for 24 V DC systems, taking a 40 A input and distributing it across eight outputs each adjustable from 1 to 5 A, with 98% efficiency and a monitoring interface for status signaling. It isolates an overloaded branch in as little as 30 ms without dropping the other seven channels.

Technical Specifications

Certifications & Standards

• CE
• UKCA
• EAC
• CB
• Shipbuilding
• DNV
• EPD

Selection Notes

The 8-channel output count doubles the branch density of a 4-channel selectivity module in the same 40 A input class, which reduces the number of modules needed in a cabinet with many small 24 V loads. The graduated overcurrent response - 30 ms at 2x setpoint down to 5 s at the setpoint itself - trips fast on a hard short but tolerates brief inrush from contactors or solenoids without nuisance tripping. The floating signal contact or pulse/pause status output lets a SIMATIC function block read individual channel status instead of a single common alarm.

Applications

Suited for cabinets with many small independent 24 V DC loads - distributed I/O stations, sensor branches, valve islands - where per-channel status feedback into the PLC is worth the extra wiring versus a common alarm contact.