Texas Instruments

PT78ST112H

PT78ST112H Description

The PT78ST112H from Texas Instruments is a high-efficiency, single-output DC-DC converter designed for industrial and commercial applications. With an input voltage range of 16V to 38V, it delivers a regulated 12V output at up to 1.5A, achieving an impressive 90% efficiency. This through-hole, right-angle mounted converter is part of the PT78ST100 series, offering robust performance in a compact form factor (23.9mm x 22.9mm x 7.9mm). Although marked as Obsolete, it remains a reliable choice for legacy systems due to its ROHS3 compliance and REACH unaffected status.

PT78ST112H Features

• Wide Input Range (16V–38V): Supports fluctuating input voltages, ideal for automotive or industrial environments.
• High Efficiency (90%): Minimizes power loss, reducing thermal stress and improving longevity.
• Protection Features: Includes Over-Temperature Protection (OTP) and Short-Circuit Protection (SCP) for enhanced reliability.
• Compact & Durable: Right-angle through-hole design saves space while ensuring mechanical stability.
• Commercial-Grade: Suitable for ITE (Commercial) applications, compliant with ECCN EAR99 and HTSUS 8504.40.9580.

PT78ST112H Applications

• Industrial Automation: Powers control systems, sensors, and actuators in harsh environments.
• Telecommunications: Provides stable voltage for networking equipment with variable input sources.
• Legacy Systems: Ideal for maintaining or upgrading older electronics where modern alternatives are incompatible.
• Test & Measurement: Ensures consistent power delivery for precision instruments.

Conclusion of PT78ST112H

The PT78ST112H excels in efficiency, durability, and protection, making it a standout in obsolete DC-DC converters. Its wide input range and compact design cater to demanding applications, while OTP/SCP safeguards critical loads. Though discontinued, it remains a pragmatic solution for engineers seeking reliable power conversion in legacy or niche systems.