SP-22

Overview

The Triad Magnetics SP-22 is a high-reliability audio transformer from the Red Spec Series, designed for through-hole mounting. It features a primary resistance of 1.05 kOhms and a secondary DC resistance of 146 Ohms and 168 Ohms across its two taps. The device operates within a frequency range of 300 Hz to 100 kHz and withstands 1000 Vrms insulation voltage. With an impedance ratio of 4.48:1:1, it supports 10k Ohm primary and 2k/500/500 Ohm secondary impedances. The unit measures 10.41mm x 7.87mm and functions reliably between -40°C and 85°C.

Feature Summary

• High reliability construction compliant with MIL-T-27E standards
• Dual secondary winding configuration with center tap options
• Wide operational temperature range for harsh environments

Applications

• Audio signal coupling in professional equipment
• Impedance matching in tube amplifier circuits
• Balanced line interfacing in communication systems

Procurement Notes

Verify the specific datasheet version to confirm pinout orientation and exact physical dimensions before integration. Ensure that the through-hole footprint matches the PCB design requirements. Confirm that the operating temperature range meets the environmental specifications of the final assembly. Cross-reference the impedance ratios with the circuit design to ensure proper signal transfer characteristics.

Selection Notes

Select this component when a robust, military-grade audio transformer is required for critical applications. The dual secondary windings provide flexibility for various impedance matching scenarios. Consider the physical size constraints as the unit requires adequate clearance for through-hole installation. Evaluate the frequency response requirements against the specified 300 Hz to 100 kHz range to ensure suitability for the intended audio bandwidth.

Part Context

The SP-22 belongs to Triad Magnetics' Red Spec Series, which emphasizes high reliability and durability. This series is often utilized in aerospace, defense, and industrial applications where standard commercial components may not suffice. The SP-22 serves as a specialized audio transformer variant within this lineup, offering specific impedance transformations tailored for high-fidelity or ruggedized audio paths.

Replacement Considerations

The SP-21 is a comparable model within the same product family. Verify electrical parameters such as impedance ratios and DC resistance when substituting. Ensure mechanical compatibility regarding pin count and mounting style.