What it is and where it fits
The Siemens 3RK1908-1EA00-1BP0 is a mechanical mounting bracket designed specifically for the ET 200SP motor starter system. It is an accessory, not a standalone device — its job is to provide a mechanical base that allows an ET 200SP motor starter to be plugged onto a DIN rail or mounting plate. The part ships as a bag of 5 units, so one order code covers five mounting positions. The bracket measures 14 mm deep, 30 mm wide, and 26 mm high. That 14 mm depth is the critical dimension for panel layout: it tells you how much space this bracket consumes from the DIN rail face forward. In a dense ET 200SP string, every millimeter of depth matters for gland-plate clearance and door swing.
Mounting and environment
The bracket is pluggable onto a BaseUnit — no tools required for the mechanical attachment. It can be mounted in vertical, horizontal, or flat orientation, which gives flexibility in cabinet layouts where the ET 200SP string may need to run across or down the backplane. The operating temperature range is -25 to +60 °C, and storage/transport range is -40 to +70 °C. Pollution degree 2 means it is rated for normal industrial environments with only non-conductive pollution — typical for a clean, enclosed control panel. Vibration resistance is specified at 15 mm amplitude up to 6 Hz, then 2 g up to 500 Hz. Shock resistance is 6 g for 11 ms. These ratings match what you would expect for a bracket mounted inside a panel on a machine subject to normal industrial vibration — conveyor lines, pump skids, packaging machinery. It is not rated for extreme shock environments like stamping presses without additional damping.
Lifecycle and sourcing
The 3RK1908-1EA00-1BP0 carries an active lifecycle status. That means it remains in Siemens' current production program — no phase-out notice, no last-time-buy clock running. For a BOM freeze or a panel that uses ET 200SP motor starters, this bracket is a standard line item that can be specified without obsolescence risk. The bracket is a mechanical accessory, so there is no electronic or firmware revision to track. The substance prohibitance date of 04/15/2016 indicates RoHS compliance alignment to that cutoff — standard for EU-market industrial gear. No special compliance documentation beyond the standard Siemens declaration of conformity is needed for this part class.