Negative rail regulator in a hermetic TO-3 can
The LM337H/NOPB is a negative adjustable voltage regulator from Texas Instruments, delivering up to 500 mA output current with an output range from -1.2 V down to -37 V. The 60 dB PSRR at 120 Hz provides meaningful ripple rejection for sensitive analog loads on the negative supply rail. Housed in a TO-205AD / TO-39-3 metal can (TO-3 footprint), this through-hole package offers a hermetic seal and robust thermal performance, suited for high-reliability and harsh-environment deployments.
Military temperature grade and protection features
Built-in over-temperature and short-circuit protection reduce the need for external supervisory circuitry and improve fault tolerance on the board.
Active production — sourcing through authorized channels
. The base product number LM337 covers a family of negative adjustable regulators; the H suffix denotes the TO-3 metal can variant, and /NOPB indicates lead-free / RoHS-compliant finish.