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UCC28C40: PIN脚变色

Part Number: UCC28C40

2023年8月新买的ucc28c40dr物料,拆开包装后发现PIN脚变色,请帮忙看看是否是正常的变化,可以正常使用吗?

焊接需要做什么处理?谢谢

物料号:UCC28C40DR

数量:2500PCS

DC:2330+5

LOT:3591410ML3