The BA157 is a silicon switching diode with a maximum repetitive reverse voltage of 100 volts and a forward current of 200 milliamperes. If you are looking for a replacement for this diode, there are several options depending on your specific requirements.
One possible replacement is the 1N4148, which is also a silicon switching diode with a similar maximum repetitive reverse voltage of 100 volts and a slightly higher forward current rating of 300 milliamperes. Other possible replacements include the BAS16, which has a similar maximum repetitive reverse voltage of 100 volts and a similar forward current rating of 200 milliamperes, and the BAT54, which is a dual series switching diode with a similar maximum repetitive reverse voltage of 30 volts and a similar forward current rating of 200 milliamperes.
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