MET-39-T

Overview

The MET-39-T is a miniature encapsulated audio transformer manufactured by Triad Magnetics. It features a primary impedance of 500 ohms and a secondary impedance of 50 ohms, providing a turns ratio of 3.16:1. The device supports a maximum DC current of 3.0 mA on the primary side and has a power rating of 50 mW. Designed for through-hole mounting, it offers an isolation voltage of 500V. The component operates within a temperature range of -40°C to 85°C and complies with RoHS3 standards.

Feature Summary

• Miniature encapsulated construction suitable for compact data and voice coupling applications
• Through-hole radial vertical mounting configuration for standard PCB integration
• High isolation voltage capability ensuring signal integrity in sensitive audio circuits

Applications

• Data and voice signal coupling in miniature electronic systems
• Audio circuit interfacing requiring impedance matching between 500 and 50 ohm stages
• Telecommunications equipment utilizing low-power audio transformers

Procurement Notes

Verify that the specific order matches the MET-39-T designation to ensure correct impedance ratios and encapsulation type. Confirm that the procurement channel provides original manufacturer documentation or authorized distributor certification. Check compliance certificates such as RoHS3 status if required by project specifications. Ensure the receiving inspection validates the physical dimensions and pin configuration against the official datasheet to prevent installation errors in tight spaces.

Selection Notes

Select this component when a miniature form factor is required for audio or data coupling applications. The 500-to-50 ohm impedance ratio makes it suitable for connecting high-impedance sources to lower-impedance loads. Consider the 50 mW power rating and 3.0 mA DC current limit to ensure the operating conditions remain within safe boundaries. The through-hole package is appropriate for prototyping or environments where surface-mount alternatives are not feasible.

Part Context

The MET-39-T belongs to Triad Magnetics' line of miniature encapsulated audio transformers. This series is designed for applications demanding small physical footprints while maintaining reliable electrical performance. These components are commonly utilized in telecommunications and audio processing equipment where space constraints are critical. The encapsulation provides protection against environmental factors while supporting standard through-hole assembly processes.

Replacement Considerations

Direct substitutes include the MET-39 model from Tamura, which shares similar 500/50 ohm impedance characteristics. Verify that any alternative component maintains the same 3.16:1 turns ratio and meets the 50 mW power rating requirement. Ensure the replacement part supports the required 500V isolation voltage and fits within the available mechanical envelope.