The document discusses Siemens miniature circuit breakers (MCBs):
- It introduces MCBs and describes their benefits like easier wiring, touch protection, and flexibility without tools.
- It provides selection and ordering data for 1-pole, 1-pole + N, 2-pole, 3-pole, 3-pole + N, and 4-pole MCBs in various amperages.
- It describes the application areas and standards for the MCBs. Characteristic B is for line protection while C is for general line protection and D is for equipment with pulse generation.