MET-25

Audio Transformers Overview

The Tamura MET-25 is a through-hole audio transformer designed for data and audio coupling applications. It features a primary impedance of 1.2kCT and a secondary impedance of 3.2 ohms, with a turns ratio of 19.4:1. The device operates within a frequency range of 300Hz to 100kHz and supports a power level of 50mW. Electrical characteristics include a primary DC resistance of 125 ohms and a secondary DC resistance of 700 milliohms. It provides 500VRMS isolation at 30 seconds and functions reliably between -20°C and +85°C.

Audio Transformers Feature Summary

• Provides precise audio signal coupling with a 19.4:1 turns ratio
• Supports standard telephone line impedances via 1.2kCT primary and 3.2 ohm secondary windings
• Ensures electrical safety with 500VRMS insulation voltage rating
• Designed for robust performance across a wide operational temperature range

Audio Transformers Applications

• Audio signal transmission in telecommunication equipment
• Data coupling circuits requiring impedance matching
• General purpose audio transformer applications
• Signal isolation in electronic interfaces

Audio Transformers Procurement Notes

Verify the specific ordering suffix to ensure compatibility with required packaging and lead times. Confirm that the component meets RoHS compliance standards for your region. Check for any recent Product Change Notifications (PCN) regarding assembly locations or material updates. Ensure the through-hole package dimensions fit your PCB layout constraints before finalizing procurement.

Audio Transformers Selection Notes

Select the MET-25 when a 19.4:1 impedance transformation from 1.2kCT to 3.2 ohms is required. Consider this component for applications operating within the 300Hz to 100kHz frequency band. Verify that the 50mW power handling capacity meets circuit requirements. Ensure the through-hole mounting style aligns with your manufacturing process and board design specifications.

Audio Transformers Part Context

The MET-25 belongs to the MET series of audio transformers manufactured by Tamura. This series is widely used in telecommunications and audio processing industries. The component utilizes a through-hole termination style, making it suitable for traditional PCB assembly methods. It is distinct from pulse transformers and power transformers, focusing specifically on signal integrity and impedance matching.

Audio Transformers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Users should consult official manufacturer resources for cross-reference information. Direct replacement requires matching the 1.2kCT:3.2 ohm impedance ratio and physical dimensions.