SP-69

Overview

The Triad Magnetics SP-69 is a high-reliability audio signal transformer designed for through-hole mounting. It features a dual secondary winding configuration with a primary impedance of 600 Ohms and secondary impedances of 600 Ohms and 150 Ohms, resulting in a 2:1:1 turns ratio. The unit operates within a frequency range of 300 Hz to 100 kHz with a power rating of 50 mW. Electrical specifications 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 an operating temperature range of -40°C to +85°C.

Feature Summary

• Dual secondary winding architecture supporting multiple impedance matching configurations
• High-reliability construction suitable for demanding industrial and commercial applications
• Encapsulated design providing mechanical durability and environmental protection

Applications

• Audio coupling circuits requiring precise signal transfer
• Impedance matching between 600 Ohm transmission lines and lower impedance loads
• Professional audio equipment and broadcast infrastructure
• Signal processing systems utilizing standard telephone line impedances

Procurement Notes

Verify the specific datasheet version when sourcing, as manufacturing updates may occur. Confirm that the supplier provides official Triad Magnetics documentation to ensure compliance with the Red-Spec series standards. Check for RoHS compliance status if environmental regulations apply to your project. Ensure the procurement channel guarantees genuine components to maintain the specified reliability metrics and electrical tolerances.

Selection Notes

Select this component when a 2:1:1 turns ratio is required for audio signal isolation or impedance transformation. The 600 Ohm primary specification aligns with standard telecommunication and professional audio interfaces. Consider the radial lead termination style for printed circuit board integration where space constraints allow. Evaluate the 50 mW power handling capability against the maximum signal levels present in the target application circuit to prevent saturation.

Part Context

The SP-69 belongs to the Red-Spec series of audio transformers manufactured by Triad Magnetics. This series is engineered for high-reliability performance in critical electronic systems. The component utilizes encapsulated technology to protect internal windings from moisture and physical stress. Its design supports stable operation across wide temperature variations, making it suitable for diverse deployment environments ranging from controlled indoor settings to harsher industrial conditions.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.