Within the Type axis, Transformer Fluid segmentation distinguishes mineral oil, synthetic ester, silicone, and biodegradable fluids. Mineral oil remains the dominant segment, comprising approximately 55 % of volume, due to its low cost and established performance record despite environmental concerns. Synthetic ester fluids hold a 25 % share, favored for higher flash points and better biodegradability, aligning with stricter environmental regulations in Europe and North America. Silicone based fluids, representing about 12 % of the market, are selected for high temperature stability and low viscosity, making them suitable for specialty transformers operating under extreme conditions. The remaining 8 % consists of emerging biodegradable formulations derived from natural esters, which are gaining traction in eco‑sensitive regions. Each fluid type influences equipment design, maintenance regimes, and total cost of ownership, thereby contributing distinctively to the overall market size and competitive dynamics of Transformer Fluid segmentation.