The Genuine E5 (V3.0) Replacement Circuit Board. This is the genuine E5 (V3.0) replacement circuit board for Cinderella Classic and Comfort toilets. As the main control unit, this PCB is the "brain" of your toilet, managing all incineration and safety functions. This modern V3.0 board is the official replacement for all previous versions (E1 to E4) and features a built-in 12VDC transformer, eliminating the need for the external transformer used on older E2-E3 models. Key Features & Benefits: Modern Replacement: The official V3.0 board, replacing all previous E1, E2, E3, and E4 versions. Integrated Transformer: Includes a built-in 12VDC transformer, simplifying installation and replacing the external transformer required by E2-E3 boards. Full Functionality: Restores and manages all heating, sensing, and safety protocols for your toilet. Genuine Cinderella Part: Ensures perfect compatibility (when installation notes are followed) and safe operation. Critical Compatibility & Installation Notes: This is a technical part. Please read all notes carefully before ordering to ensure you get the correct part and any required adapters. Software Version: This E5 V3.0 board is NOT compatible with toilet software versions older than v3.2. Replacing an 'E1' Board: If upgrading a Classic model from before 2003 (or S/N 03363999), you MUST also order a new Thermocouple (100831) and Battery Cable (100720). Nidec Hatch Motor: If your toilet has a Nidec hatch motor AND you are replacing an E5 v1.5-1.10 board (from S/N Comfort CF05E5 1917 412117 or Classic CL05E5 1921 205613), you MUST also order a Nidec Motor Cable (101462). Technical Specifications Specification Details Product Name Cinderella® - Circuit board (E5 - V3.0) Manufacturer Cinderella Eco Group Manufacturer Part # 100063 Version E5 V3.0 Compatibility Cinderella® Classic & Comfort Models (See notes) Replaces Versions E1, E2, E3, E4 Warranty N/A (Electronic Part - installation sensitive) Contents 1 x Circuit Board E5 V3.0 The official replacement "brain" for your Classic or Comfort toilet.