2. LM258DG4 Substitution Conclusion Substitution may be considered with caution in non-automotive applications, provided key differences are noted. The LM258DG4 offers a higher gain-bandwidth product (1.1MHz) compared to the original (700kHz), delivering better high-frequency performance; input offset voltage (3mV) is slightly higher than the original (2mV), which may affect DC precision in sensitive circuits; supply range (3–32V) is somewhat narrower than the original (2–36V), particularly with a higher minimum supply voltage, restricting use in low-voltage applications. Although parameters such as quiescent current and output current are similar to the original, the original part is explicitly qualified to automotive grade, while the LM258DG4 does not claim equivalent certification, thus it is unsuitable for automotive or high-reliability environments. For industrial or consumer applications where input offset voltage and minimum supply voltage are not critical, substitution may be acceptable.