Raspberry Pi generated sales of £15m in the first half, up from £4m in 2012, as Premier Farnell extended its offering of ancillary products.
The manufacurer said sales of Raspberry Pi had moderated through the first half as anticipated in the normal lifecycle of electronics products.
In the 26 weeks to 2 February, total revenue at the business increased from £479m to £498m while pre-tax profit rose from £31.8m to £38.1m.
Sales excluding Raspberry Pi declined 1.4 per cent as overall market conditions remain subdued.
"Our core business has delivered a stable performance overall despite the mixed conditions that have impacted some developed markets such as North America and the UK," said chief executive Laurence Bain.
"Focus on optimising performance saw the group's industry leading operating margin improve from the levels experienced at the end of the prior year, making progress towards our targeted range."
Bain added that the market conditions remained variable but inventory investments made in the first half and initiatives taken to optimise business performance were expected to grow the company's "customer base, gain market share and drive financial performance".