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SPT-302 is listed in the Audio Transformers range at ChipApex. The manufacturer field lists Prem Magnetics, Inc.. Its product description is AUDIO XFMR 500CT / 500CT TH. Review the specifications below when checking this part for your BOM.
Audio Transformers specifications for SPT-302
- Description：AUDIO XFMR 500CT / 500CT TH
- Series：SPT-300
- Mfr：Prem Magnetics, Inc.
- Package：Bulk
- Mounting Type：Through Hole
- Size / Dimension：0.697" L x 0.630" W (17.70mm x 16.00mm)
- Height - Seated (Max)：0.551" (14.00mm)
- Termination Style：PC Pin
- Turns Ratio - Primary:Secondary：-
- Impedance - Primary (Ohms)：500CT
- Impedance - Secondary (Ohms)：500CT
- DC Resistance (DCR) - Primary：30Ohm
- DC Resistance (DCR) - Secondary：28Ohm
- Transformer Type：Economical Open Type
- Frequency Range：-
- Frequency Response：-
- Voltage - Isolation：1000Vrms
- Insertion Loss：-
- Return Loss：-
- Power Level：100mW
- Operating Temperature：-
- Approval Agency：-
Audio Transformers datasheet and documents for SPT-302
Audio Transformers Overview
The SPT-302 is an audio interstage transformer manufactured by Prem Magnetics, Inc. It features a primary impedance of 500 ohms with a center tap and a secondary impedance of 500 ohms with a center tap. The component has a DC resistance of 30 ohms on the primary side and 28 ohms on the secondary side. Designed for through-hole mounting, this unit serves as a coupling transformer in audio signal paths.
Audio Transformers Feature Summary
- Provides electrical isolation and impedance matching between audio stages
- Features center-tapped windings on both primary and secondary sides
- Constructed for reliable through-hole PCB integration
Audio Transformers Applications
- Audio amplifier interstage coupling
- Signal path impedance transformation
- Audio equipment circuit isolation
Audio Transformers Procurement Notes
Verify the specific datasheet version to confirm frequency response characteristics, as standard listings may omit detailed AC performance metrics. Ensure the through-hole footprint matches the target PCB layout dimensions. Confirm that the 30-ohm primary and 28-ohm secondary DC resistances align with the system's bias requirements. Check for RoHS compliance status if environmental regulations apply to the final assembly.
Audio Transformers Selection Notes
Select this component when a 500-ohm to 500-ohm audio coupling solution is required. The center-tapped configuration allows for balanced signal handling or specific biasing arrangements. Consider the physical size constraints for through-hole installation. Evaluate whether the specified DC resistance values fit within the acceptable loss budget of the audio chain compared to alternative transformer impedances.
Audio Transformers Part Context
Prem Magnetics, Inc. specializes in manufacturing coils, inductors, and transformers, including audio and power variants. The SPT series represents their line of audio transformers designed for professional and consumer electronics. This manufacturer focuses on multi-generation family-owned production standards, supplying components for various industrial and commercial applications requiring magnetic signal processing.
Audio Transformers Replacement Considerations
No public confirmed substitute part numbers are available in the provided documentation. Verify pinout compatibility and impedance ratios before considering any generic alternatives.
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