US-based PDI was acquired for $235m which will be subject to post closing adjustments with respect to working capital at completion.
PDI produces power distribution units, static transfer switches, remote power panels, power conditioning units, medium and low voltage transformers and patented power monitors used mainly in data centre and alternative energy applications.
The acquisition of PDI, which will be cash-funded, is subject to regulatory approval.
Smiths Interconnect president Ralph Phillips said with the addition of PDI, Smiths will now be able to provide a breadth of high reliability power quality capabilities, including conditioning, protection, distribution, filtering and monitoring to ensure the optimum function of advanced electrical systems.
Smiths Interconnect is a division of global technology business Smiths Group.