L78M24ABDT-TR

The L78M24ABDT-TR is a fixed 24V positive linear regulator from the L78M family. It provides a regulated 24V output at up to about 0.5 A from a higher DC input. The “DT-TR” suffix indicates a TO-220AB package with Tape & Reel shipment. It features built‑in current limiting and thermal/shutdown protections and requires external input and output capacitors for stability. Typical operation uses Vin somewhat above 24 V (often > ~26 V) to maintain regulation. Pinout (TO-220): left = Input, middle = Ground (the tab is Ground), right = Output. Power dissipation is (Vin − 24V) × Iout, so adequate heatsinking is important at higher loads. Applications include generating a stable 24 V rail for embedded electronics, telecom, industrial, and automotive systems.

Equivalent products to L78M24ABDT-TR are other 24V fixed regulators in the 78xx family from different manufacturers, for example:
- LM7824 (National/TI)
- MC7824 (Motorola)
Other variants like KA7824 (Renesas) can also substitute.
Notes:
- All are 3-pin, TO-220 style, with similar pinouts (IN–GND–OUT).
- Check exact current rating and thermal features for your design.

Key features of L78M24ABDT-TR (ST 24V fixed regulator):
- Fixed output: 24 V regulated, three-terminal linear regulator.
- Output current: up to about 1.5 A (thermally limited).
- Input range: up to 35 V max; dropout ≈ 2 V at 1 A.
- Protections: current limit, thermal/shutdown protection, safe-area protection.
- Regulation: reasonable line and load regulation with typical accuracy (±a few percent).
- Temperature range: operating -40°C to +125°C.
- Package: TO-220AB (3 pins); RoHS-compliant; -TR denotes tape-and-reel packaging.
- Stability hints: requires input and output capacitors (typical Cin ≈ 0.33 μF, Cout ≈ 0.1 μF) for stability and good transient response.
- Applications: general purpose fixed 24 V supply in embedded/industrial designs.
Note: exact current rating and tolerances vary slightly by lot; consult the datasheet for your exact spec sheet.

- Pin count: 3
- Pin functions (viewing the front of the device, leads down):
- Pin 1: Input (Vin)
- Pin 2: Ground
- Pin 3: Output (Vout = +24 V)
Note: This is a fixed 24 V positive linear regulator in a TO-220AB package; TR indicates tape-and-reel packaging.

- Manufacturer: STMicroelectronics (ST)
- What kind of company: A multinational semiconductor company that designs, manufactures, and sells a wide range of integrated circuits and discrete components (analog, power, MEMS, sensors), headquartered in Geneva, Switzerland.

L78M24ABDT-TR is a fixed +24 V linear regulator (about 0.5 A). Common applications include:
- Providing a 24 V rail from a higher DC input in industrial automation, instrumentation, telecom, and general electronics.
- Upstream/regulator stage to generate lower rails (e.g., 12 V or 5 V) in power supplies.
- Driving 24 V loads such as relays, solenoids, small motors, and 24 V logic circuits.
- Prototyping, education, and hobby projects needing a simple, rugged fixed-voltage source.
- Automotive/industrial boards (with adequate heat sinking and protection).

TO-220AB (through-hole plastic) package. The -TR suffix indicates Tape & Reel packaging.