SP-69-B

Audio Transformers Overview

The Triad Magnetics SP-69-B is an encapsulated audio transformer designed for high-reliability applications. It features a 2:1:1 turns ratio with a 600 Ohm primary impedance and dual secondary impedances of 600 Ohms and 150/150 Ohms. The unit operates within a frequency range of 300 Hz to 100 kHz, supporting a power rating of 50 mW. Electrical characteristics include a primary DC resistance of 72 Ohms and secondary DC resistances of 40 Ohms and 45 Ohms. The component provides 1 kV isolation voltage and functions reliably across a temperature range of -40°C to +85°C.

Audio Transformers Feature Summary

• Encapsulated epoxy molded construction for durability
• Gold-plated leads for reliable connectivity
• High-reliability design suitable for demanding environments

Audio Transformers Applications

• Audio signal coupling
• Impedance matching in professional audio systems
• Telecommunications equipment

Audio Transformers Procurement Notes

Verify the specific suffix 'B' against manufacturer documentation to confirm packaging or variant distinctions. Ensure compatibility with existing PCB layouts regarding radial pin terminal spacing. Confirm RoHS compliance status through official datasheets prior to integration into regulated assemblies.

Audio Transformers Selection Notes

Select this component when a 2:1:1 turns ratio and 600 Ohm primary impedance are required. The encapsulated form factor offers protection against environmental factors compared to open-frame alternatives. Consider the 50 mW power handling limit and frequency response range for signal integrity requirements.

Audio Transformers Part Context

The SP-69-B belongs to the Red-Spec series of audio transformers from Triad Magnetics. This series is engineered for precision and durability in critical audio and signal processing circuits. The part utilizes radial through-hole mounting technology, distinguishing it from surface-mount variants within the broader product family.

Audio Transformers Replacement Considerations

The standard SP-69 is the base model; verify if the '-B' suffix denotes a specific bulk packaging variation rather than a functional difference. No direct cross-manufacturer substitutes are documented in the provided source material.