MET-37

Overview

The Tamura MET-37 is a through-hole audio transformer designed for signal coupling applications. It features a primary impedance of 500CT ohms and a secondary impedance of 600 ohms, with a turns ratio of 0.918:1. The device operates within a frequency range of 300Hz to 100kHz and maintains a frequency response of ±2dB. Electrical characteristics include a primary DC resistance of 65 ohms and a secondary DC resistance of 95 ohms. It supports a power rating of 50mW and provides 500VRMS isolation for 30 seconds. The component functions reliably across an operating temperature range of -20°C to 85°C.

Feature Summary

• Provides electrical isolation between circuit stages while maintaining signal integrity within the specified audio frequency band.
• Features center-tapped primary winding configuration suitable for balanced signal processing requirements.
• Constructed for through-hole mounting to ensure mechanical stability in standard PCB assemblies.

Applications

• Audio signal coupling in professional sound equipment
• Impedance matching in telecommunication interface circuits
• Balanced-to-unbalanced signal conversion in audio processing systems

Procurement Notes

Verify the specific manufacturer datasheet for the MET-37 to confirm current RoHS compliance status and lead times. Ensure that the through-hole pin configuration matches the target PCB footprint dimensions. Cross-reference the primary and secondary impedance values against the system design requirements to guarantee proper signal transfer efficiency. Confirm that the operating temperature range aligns with the environmental conditions of the final assembly.

Selection Notes

Select the MET-37 when a center-tapped primary impedance of 500 ohms is required alongside a 600-ohm secondary load. Consider this component for designs needing high isolation voltage and wide bandwidth up to 100kHz. Evaluate the physical dimensions and through-hole mounting style against available board space. Compare the 50mW power handling capability with the expected signal levels to prevent saturation or distortion during operation.

Part Context

The MET-37 belongs to the MET series of audio transformers manufactured by Tamura. This series focuses on providing reliable signal transformation for audio and low-frequency applications. The component utilizes traditional wound core technology to achieve precise impedance ratios and isolation characteristics essential for professional audio and communication hardware.

Replacement Considerations

The Triad Magnetics SP-50 is documented as a similar alternative part number. Verify electrical compatibility, including impedance ratios and frequency response, before substitution. Physical mounting dimensions and pin configurations must be checked to ensure interchangeability without PCB redesign.

FAQ

What is the center-tap configuration of the primary winding?

The primary winding has a 500CT (center-tapped) configuration, allowing for balanced signal connections or split-phase applications.

Does the MET-37 support frequencies above 100kHz?

No, the specified operational frequency range for the MET-37 extends from 300Hz to 100kHz.