SIPTU members at Kyte Powertech in Cavan will begin 24-hour strike action over pay, on Friday the 19th of August.
Union organiser, Martin O'Rourke said members had "reluctantly" reached the decision.
He added that strike action was decided only after every other avenue open to employees had been explored.
Mr O'Rourke says workers face a cost of living crisis that has resulted from an inflation rate which is the highest in a generation along side soaring costs for other essential services.
“There have been intensive negotiations involving SIPTU representatives and management at the WRC in recent times but these did not result in the WRC being in a position to issue a proposal to resolve this dispute," said Mr O'Rourke.
“SIPTU organisers and shop stewards are available to reconvene discussions and believe an agreement that adequately recognises the efforts of these workers can be achieved."
Meanwhile, Northern Sound understands that intensive negotiations involving SIPTU representatives and the company's management at the Workplace Relations Commission recently, failed to reach a resolution.
Meanwhile, the manufacturing plant was established in Cavan in 1977 and supplies a large and diverse range of Distribution Transformer products and services.