TY-303P

Overview

The TY-303P is a data and voice coupling audio transformer manufactured by Triad Magnetics. It features a primary impedance of 4000 Ohms and a secondary impedance of 600 Ohms, providing a turns ratio of 2.43:1. The device operates within a frequency range of 300 Hz to 3.5 kHz and supports a maximum DC current of 90 mA. It utilizes radial pin terminal termination for through-hole mounting. The unit provides an insulation voltage of 1.5 kV and is designed for single-channel applications.

Feature Summary

• Provides electrical isolation between circuits while maintaining signal integrity for voice and data transmission.
• Designed specifically to meet FCC Part 68 requirements for telephone equipment connectivity.
• Facilitates impedance matching between high-impedance lines and standard 600-Ohm networks.

Applications

• Data and voice coupling in telecommunications systems
• Impedance matching for line balancing and bridging applications
• FCC Part 68 compliant telephone interface circuits

Procurement Notes

Verify the specific ordering suffix to ensure the correct impedance configuration and termination style match the design requirements. Confirm that the component meets all necessary regulatory certifications, including FCC Part 68 compliance, for the intended market. Cross-reference the datasheet specifications against the target circuit parameters to ensure compatibility with the system's voltage and current limits before finalizing procurement.

Selection Notes

Select this component when a 4000:600 Ohms impedance transformation is required for voice or data signals. Ensure the operating temperature range of -20°C to +85°C aligns with the environmental conditions of the application. Consider the physical dimensions and through-hole mounting style for PCB layout constraints. Verify that the unshielded construction does not introduce unacceptable noise in sensitive environments.

Part Context

The TY-303P belongs to the TY series of audio transformers from Triad Magnetics. This series is engineered for various applications including line matching, telephone coupling, pulse triggering, driver stages, interstage coupling, output isolation, and input buffering. These components are widely used in telecommunications infrastructure where reliable signal transfer and electrical isolation are critical.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. When evaluating alternatives, ensure the replacement matches the 4000:600 Ohms impedance ratio, 300 Hz to 3.5 kHz frequency response, and 90 mA DC current rating. Verify that any substitute also complies with FCC Part 68 standards if used in telephony applications.

FAQ

What is the primary impedance of the TY-303P?

The primary impedance is 4000 Ohms.

Does the TY-303P provide electrical isolation?

Yes, it provides isolation with an insulation voltage rating of 1.5 kV.

What is the maximum DC current the transformer can handle?

The maximum DC current rating is 90 mA.