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TSR 1-2433

TSR 1-2433

Traco Power
Linear Regulator Replacement DC DC Converter 1 Output 3.3V 1A 4.75V - 36V Input
Active11,531 in stock
Datasheet Digi-Key Compare Prices

Overview

The TSR 1-2433 is a non-isolated DC/DC step-down converter designed as a high-efficiency replacement for traditional TO-220 packaged 78xx linear regulators. It provides a stable 3.3V output at up to 1A from a wide input voltage range of 4.75V to 36V. With a peak efficiency of 91 percent, this switching regulator eliminates the need for bulky heatsinks in space-constrained designs.

Why Choose This Part

This converter offers built-in short circuit protection and excellent line/load regulation without requiring external capacitors for basic operation. Its compact 3-SIP package and 36V maximum input voltage provide a robust and versatile power solution that runs much cooler than linear alternatives.

Applications

Battery Powered Systems
The 91 percent efficiency and 2mA standby current significantly extend battery life compared to wasteful linear regulators.
Point of Load Regulation
Ideal for stepping down 12V or 24V industrial rails to 3.3V logic levels for MCUs and sensors.
Legacy Equipment Upgrades
Drop-in replacement for LM7833 linear regulators in existing TO-220 footprints to reduce thermal load.

Key Specifications

Type Linear Regulator Replacement
Features SCP
Efficiency 91%
Applications ITE (Commercial)
Mounting Type Through Hole
Power (Watts) 3.3 W
Package / Case 3-SIP Module
Size / Dimension 0.46" L x 0.30" W x 0.40" H (11.7mm x 7.5mm x 10.1mm)
Number of Outputs 1
Voltage - Output 1 3.3V
Operating Temperature -40degC ~ 85degC (With Derating)
Voltage - Input (Max) 36V
Voltage - Input (Min) 4.75V
Current - Output (Max) 1A

Getting Started

Integrating the TSR 1-2433 is straightforward as it uses the standard 3-pin SIP layout (Input, Ground, Output) compatible with TO-220 footprints. While it features built-in filter capacitors, adding an external 10uF ceramic capacitor on the input is recommended for systems with long lead wires to ensure stability across the full 4.75V to 36V range.

TSR 1-2433 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Package Size / Dimension Stock
TSR 1-2433 (this part) SIP-3 0.46" L x 0.30" W .. 11,531
TSR 1-2433SM SMD-10 0.60" L x 0.37" W .. 1,700

Also Consider

OKI-78SR-3.3/1.5-W36-C Murata Power Solutions - Offers a higher 1.5A output current capability in a similar 3-pin vertical SIP package.