2. BU7486F-E2 Substitution Conclusion This device can serve as a performance-degraded alternative for substitution in certain applications, but must be used with caution. The BU7486F-E2 exhibits dynamic performance close to the original part: its slew rate (10 V/µs) is comparable to the original (11.5 V/µs), and its gain-bandwidth product (10 MHz), though only about one-ninth of the original, is still sufficient for mid-to-low frequency signals. However, its input accuracy is notably insufficient: the input offset voltage (1 mV) is 100 times worse than the original, and the input bias current (1 pA) is 10 times worse, introducing significant DC error, making it unsuitable for high-precision amplification or weak signal detection. Additionally, its output current (12 mA) is only one-fifth of the original, resulting in weak capability to drive capacitive or low-impedance loads, and its quiescent current (6 mA) is higher, presenting a clear disadvantage in power consumption. Substitution should only be considered in applications where DC accuracy is not critical, the signal bandwidth falls within the mid-frequency range, and power consumption is not a primary concern.