L7912ACV STMicroelectronics -12V Negative Linear Voltage Regulator (TO-220-3)

Op-amps, audio circuits, and a good deal of analog signal conditioning need both a positive and a negative supply rail to work with signals that swing above and below zero, and this is the negative half of that pair. Where the L7812 family produces a clean +12V, the L7912ACV produces -12V from a negative input in the -19V to -35V range, completing a split-rail power supply when paired with its positive counterpart. Delivering up to 1.5A, it's sized the same as the rest of the family and mounts the same way on a heatsink in the shared TO-220 package. Any project building its own dual-rail bench supply or analog signal path needs exactly this part to get the negative side of the supply right.