SP-20-B

Overview

The Triad Magnetics SP-20-B is a through-hole audio coupling transformer designed for signal transmission applications. It features a primary impedance of 1.2k ohms center-tapped and a secondary impedance of 2.88 ohms, resulting in a turns ratio of 2.88:1. The device operates within a frequency range of 300Hz to 100kHz with a tolerance of ±2dB. Electrical specifications include a primary DC resistance of 1.05k ohms and a secondary DC resistance of 200 ohms. Rated power is 50mW, with isolation voltage of 1000VRMS at one second. The component utilizes PC pin termination and epoxy molding.

Feature Summary

• Audio coupling design optimized for signal integrity within specified frequency bands
• Center-tapped primary configuration supporting balanced circuit interfacing
• Epoxy molded construction providing mechanical stability and solder inspection recess

Applications

• Audio signal coupling circuits
• Impedance matching between stages
• Balanced line interfacing

Procurement Notes

Verify the specific ordering suffix against official Triad Magnetics documentation to ensure correct impedance and packaging specifications. Confirm that the component meets required environmental standards such as RoHS compliance before integration into final assemblies. Cross-reference datasheet parameters with system requirements to validate electrical performance.

Selection Notes

Select this component when a 1.2k ohm center-tapped primary is required for audio applications. Ensure the operating temperature range of -40°C to 85°C aligns with the intended environment. Verify that the through-hole mounting style and physical dimensions fit the target PCB layout constraints.

Part Context

This part belongs to the Red-Spec series of audio transformers from Triad Magnetics. These components are engineered for high reliability in demanding audio designs. The series provides precision spacing for plug-in terminals and standardized dimensions to facilitate consistent manufacturing processes across various equipment types.

Replacement Considerations

Consult official manufacturer substitution guides for verified alternatives. Generic replacements may not match the specific impedance ratios or frequency response characteristics required for precise audio coupling applications.