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Product Detailed Parameters
- Description：AUDIO XFMR 500 / 50 TH
- Series：MET
- Mfr：Tamura
- Package：Tube
- Mounting Type：Through Hole
- Size / Dimension：0.409" L x 0.310" W (10.40mm x 7.87mm)
- Height - Seated (Max)：0.465" (11.80mm)
- Termination Style：PC Pin
- Turns Ratio - Primary:Secondary：3.16:1
- Impedance - Primary (Ohms)：500
- Impedance - Secondary (Ohms)：50
- DC Resistance (DCR) - Primary：55Ohm
- DC Resistance (DCR) - Secondary：8Ohm
- Transformer Type：Data/Voice Coupling
- Frequency Range：300Hz ~ 100kHz
- Frequency Response：±2dB
- Voltage - Isolation：500VRMS @ 30 Seconds
- Insertion Loss：-
- Return Loss：-
- Power Level：50mW
- Operating Temperature：-20°C ~ 85°C
- Approval Agency：-
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Overview
The Tamura MET-39 is a through-hole audio and signal transformer designed for data and voice coupling applications. It features a primary impedance of 500 Ohms and a secondary impedance of 50 Ohms, providing a turns ratio of 3.16:1. The component operates within a frequency range of 300Hz to 100kHz and supports a maximum DC current of 3.0mA on the primary side. With a power rating of 50mW, it is suitable for low-power signal transmission tasks in electronic circuits requiring impedance matching between high and low impedance lines.
Feature Summary
- Provides impedance transformation between 500 Ohm primary and 50 Ohm secondary windings
- Designed for data and voice signal coupling applications
- Supports through-hole mounting for standard PCB integration
Applications
- Data line coupling
- Voice signal transmission
- Impedance matching in audio circuits
Procurement Notes
Verify the specific datasheet version from Tamura or authorized distributors to confirm mechanical dimensions and electrical tolerances. Ensure the selected packaging type matches assembly requirements, as bulk and tube options may exist. Cross-reference pinout configurations with target PCB layouts to prevent installation errors during production.
Selection Notes
Select this component when a 3.16:1 impedance ratio is required for balancing 500 Ohm sources with 50 Ohm loads. Consider the 300Hz lower frequency limit for voice band applications. Evaluate the 3.0mA DC current rating against circuit bias conditions to ensure safe operation without saturation.
Part Context
The MET-39 belongs to the MET series of audio transformers manufactured by Tamura. This series focuses on compact signal isolation and impedance conversion solutions. The MET-39 specifically addresses needs for coupling data and voice signals where minimal insertion loss and reliable performance are critical for system integrity.
Replacement Considerations
Consult official Tamura documentation for direct cross-references. Generic replacements must match the 500:50 Ohm impedance ratio, 300Hz-100kHz frequency range, and through-hole form factor to maintain circuit functionality.
