108K

Overview

The Hammond Manufacturing 108K is an audio transformer featuring a primary impedance of 1.5 kOhms and a primary resistance of 170 Ohms. It is epoxy potted in a molded case with pin-type PC board mount capability, requiring a minimum pin length of 0.187 inches. The component has a power rating of 150 mW at ±1.5 dB within the frequency range of 300 Hz to 50 KHz. It withstands soldering for 10 seconds at 260°C with an ambient temperature of 85°C maximum.

Feature Summary

• Epoxy potted construction within a molded case for durability
• Pin-type PC board mount design with specified minimum pin length
• Rated for specific power output across defined audio frequencies
• Capable of withstanding high-temperature soldering processes

Applications

• Audio input circuits
• Line matching applications
• Output transformers

Procurement Notes

Verify the manufacturer part number 108K against official Hammond Manufacturing documentation to ensure authenticity. Confirm that the epoxy potted construction and pin dimensions match your PCB layout requirements. Check compliance with environmental standards if applicable to your region. Ensure the soldering temperature limits are respected during assembly to prevent damage to the molded case or internal windings.

Selection Notes

Select this component when a 1.5 kOhm primary impedance is required for audio signal transformation. Consider the 150 mW power rating and 300 Hz to 50 KHz frequency response for compatibility with your circuit's bandwidth needs. The pin-type mounting dictates the PCB footprint design. Evaluate the thermal tolerance against your operating environment and soldering process parameters.

Part Context

This audio transformer belongs to the 108 Series from Hammond Manufacturing. It is designed for general-purpose audio applications requiring impedance matching and signal isolation. The series offers various configurations, but the 108K specifically targets circuits needing a 1.5 kOhm primary side. It complements other Hammond components in audio system designs.

Replacement Considerations

Consult Hammond Manufacturing datasheets for direct replacements within the 108 Series. Verify that any substitute matches the 1.5 kOhm primary impedance, 170 Ohm primary resistance, and 150 mW power rating. Ensure physical dimensions and pin spacing are compatible with existing PCB layouts.