SP-68-B

Overview

The Triad Magnetics SP-68-B is a through-hole audio transformer designed for signal coupling applications. It features a primary impedance of 10 kOhms and a secondary configuration with center-tapped windings, providing an effective impedance ratio of 10k:10kCT. The device operates within a frequency range of 300 Hz to 100 kHz and supports an isolation voltage of 1 kV RMS. With a maximum current rating of 1 mA and power handling of 50 mW, it utilizes PC pin termination for vertical mounting.

Feature Summary

• Provides galvanic isolation between circuit stages via electromagnetic coupling
• Features UL94 V-0 rated molded encapsulation for safety compliance
• Includes precision-spaced plug-in terminals for fixed mounting centers
• Designed for low-level audio signal transmission with minimal distortion

Applications

• Audio signal coupling in professional sound equipment
• Interstage transformer connections in tube amplifiers
• Impedance matching between high-impedance audio sources and inputs
• Balanced/unbalanced signal conversion in recording interfaces

Procurement Notes

Verify the specific suffix designation against manufacturer documentation to confirm packaging type and terminal configuration. Ensure that the required operating frequency range aligns with the component's specified bandwidth limits. Confirm mechanical dimensions match the target PCB layout constraints before finalizing procurement decisions.

Selection Notes

Select this component when a 10 kOhm primary impedance is required for audio stage coupling. Consider the 1 mA current limit and 50 mW power rating for appropriate signal levels. Evaluate the through-hole mounting style against available board space and assembly methods. Verify thermal performance requirements against the specified operating temperature range.

Part Context

This model belongs to Triad Magnetics' line of encapsulated audio transformers. These components are engineered for reliable performance in consumer and professional audio electronics. The series emphasizes compact form factors suitable for dense PCB layouts while maintaining electrical integrity across the audible spectrum.

Replacement Considerations

Direct substitutes must match the 10k:10kCT impedance ratio and 100 kHz upper frequency limit. Verify equivalent isolation voltage ratings and physical footprint compatibility. Consult manufacturer cross-reference lists for validated alternative part numbers with identical electrical characteristics.