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Product Detailed Parameters
- Description：AUDIO TRANSFORMER
- Series：-
- Mfr：Tamura
- Package：Bulk
- Mounting Type：-
- Size / Dimension：-
- Height - Seated (Max)：-
- Termination Style：-
- Turns Ratio - Primary:Secondary：-
- Impedance - Primary (Ohms)：-
- Impedance - Secondary (Ohms)：-
- DC Resistance (DCR) - Primary：-
- DC Resistance (DCR) - Secondary：-
- Transformer Type：-
- Frequency Range：-
- Frequency Response：-
- Voltage - Isolation：-
- Insertion Loss：-
- Return Loss：-
- Power Level：-
- Operating Temperature：-
- Approval Agency：-
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Overview
The MET-58 is an audio transformer manufactured by Tamura Corporation, designed for signal coupling applications. It features a primary impedance of 600 ohms and a secondary configuration of 150/150 ohms center-tapped, providing a 2:1:1 turns ratio. The component operates within a frequency range of 300 Hz to 100 kHz. It utilizes through-hole mounting technology with physical dimensions of 10.4 mm in length, 7.87 mm in width, and 11.8 mm in height. The device supports a maximum DC unbalance current of 3 mA and complies with RoHS standards.
Feature Summary
- Provides balanced-to-unbalanced or unbalanced-to-balanced signal conversion via center-tapped secondary winding
- Optimized for audio frequency band transmission with wide bandwidth capability
- Constructed for reliable through-hole PCB integration in telecom equipment
Applications
- Telecommunications line interface circuits
- Audio signal coupling in professional communication systems
- Impedance matching between 600-ohm lines and lower impedance stages
Procurement Notes
Verify the specific manufacturer source, as MET-58 designations appear across multiple vendors including Tamura and Triad Magnetics. Confirm that the received component matches the required 600/150:150 impedance ratio and 2:1:1 turns ratio specifications. Ensure the package type corresponds to the through-hole variant with the specified physical dimensions. Check for RoHS compliance documentation if environmental regulations apply to the final assembly.
Selection Notes
Select this component when interfacing standard 600-ohm telecommunication lines with 150-ohm balanced inputs or outputs. The 300 Hz to 100 kHz frequency response suits voice and low-frequency data signals. Consider the physical size constraints for through-hole placement on the target PCB. Ensure the isolation requirements are met by the specific manufacturer's datasheet, as hi-pot ratings may vary between different producers using this part number.
Part Context
The MET series from Tamura includes various audio and signal transformers optimized for high-density packaging and telecom applications. These components typically feature high isolation voltages and are approved for safety standards such as UL1950. The MET-58 specifically addresses impedance transformation needs in legacy and modern telecom infrastructure, serving as a critical passive element for signal integrity.
Replacement Considerations
Triad Magnetics offers the MET-59-T as a comparable alternative with identical 600/150:150 impedance characteristics and through-hole mounting. Verify pinout compatibility and physical footprint alignment before substitution. Other MET series variants may differ in impedance ratios or frequency ranges.
