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Buy Silicon Rectifier 1N4004 1A 400V from Taiwan Semiconductor - a high efficiency, low VF device that comes in a DO-41 package and has a high current handling capability with low power loss.
A. Hi Stan. Thank you for your question. A 1N4744 is a 1W 15V Zener diode compared to the 1N4004 which is a 400V 1A diode so a very different set of characteristics. Depending what the application was it may be ok but unlikely. 47-5102 is a 1.3W 15V zener diode so a better match and only slightly higher rated – currently on clearance.