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Product Detailed Parameters
- Description：AUDIO XFMR 600 / 600CT TH
- Series：TTC
- Mfr：Tamura
- Package：Bulk
- Mounting Type：Through Hole
- Size / Dimension：0.591" L x 0.571" W (15.00mm x 14.50mm)
- Height - Seated (Max)：0.472" (12.00mm)
- Termination Style：PC Pin
- Turns Ratio - Primary:Secondary：1:01
- Impedance - Primary (Ohms)：600
- Impedance - Secondary (Ohms)：600CT
- DC Resistance (DCR) - Primary：58Ohm
- DC Resistance (DCR) - Secondary：14Ohm, 62Ohm
- Transformer Type：Data/Voice Coupling
- Frequency Range：300Hz ~ 3.5kHz
- Frequency Response：±0.16dB
- Voltage - Isolation：1850V @ 1 Second
- Insertion Loss：1.2dB Max @ 1kHz
- Return Loss：-
- Power Level：-
- Operating Temperature：-
- Approval Agency：UL1950
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Overview
The Tamura TTC-294 is a modem transformer designed for telecommunications coupling applications. It features a primary source impedance of 600 ohms and a secondary impedance of 600 ohms, ensuring balanced signal transmission. The component supports a frequency range of 300Hz to 3.5kHz with a maximum insertion loss of 1.2dB at 1kHz. It provides robust isolation capabilities, rated at 1850V for one second or 1500Vrms continuous operation. This data/voice coupling transformer is engineered for reliable performance in voice band communication systems.
Feature Summary
- Balanced 600-ohm primary and secondary impedance configuration for standard telecommunication line matching
- Low insertion loss specification of 1.2dB maximum within the operational frequency band
- High voltage isolation rating supporting both continuous RMS and impulse voltage requirements
Applications
- Modem signal coupling in telecommunications equipment
- Voice band data transmission interfaces
- Telephony system line termination circuits
Procurement Notes
Verify the specific datasheet version and ordering suffix when sourcing the Tamura TTC-294. Confirm that the component meets the required isolation voltage standards for your specific application environment. Ensure compatibility with existing PCB footprints and thermal management requirements before finalizing procurement decisions.
Selection Notes
Select the TTC-294 when a 600-ohm balanced transformer is required for voice frequency applications. Consider its 1.2dB insertion loss limit and 300Hz-3.5kHz bandwidth for standard telephony use cases. Evaluate the 1500Vrms isolation rating against system safety requirements and environmental conditions to ensure long-term reliability.
Part Context
The TTC-294 belongs to Tamura's series of audio and signal transformers, specifically optimized for telecommunications. It serves as a coupling device between balanced lines and unbalanced circuits or other balanced stages. The component is part of a broader family of modem transformers designed for voice and low-speed data transmission environments.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Verify pinout compatibility and electrical specifications if considering alternative manufacturers for this 600-ohm coupled transformer application.
