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Product Detailed Parameters
- Description：AUDIO XFMR 600 / 600 TH
- Series：TTC
- Mfr：Tamura
- Package：Bulk
- Mounting Type：Through Hole
- Size / Dimension：1.272" L x 1.299" W (32.30mm x 33.00mm)
- Height - Seated (Max)：0.626" (15.90mm)
- Termination Style：PC Pin
- Turns Ratio - Primary:Secondary：1:01
- Impedance - Primary (Ohms)：600
- Impedance - Secondary (Ohms)：600
- DC Resistance (DCR) - Primary：95Ohm
- DC Resistance (DCR) - Secondary：180Ohm
- Transformer Type：-
- Frequency Range：300Hz ~ 3.5kHz
- Frequency Response：±0.5dB
- Voltage - Isolation：1500VRMS @ 1 Minute
- Insertion Loss：2.2dB Max @ 1kHz
- Return Loss：14dB Typ
- Power Level：-45dB ~ 7dB
- Operating Temperature：-
- Approval Agency：CSA-C22.2 No. 66-M1988, UL1459
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Overview
The Tamura TTC-125 is a modem transformer designed for telecommunications applications. It features a primary and secondary impedance of 600 Ohms, supporting a maximum current of 80mA with an operating limit of 7dBm. The device operates within a frequency range of 300Hz to 3.5kHz and provides a typical return loss of 14dB. It has a secondary DC resistance of 180 Ohms and utilizes a through-hole mounting style.
Feature Summary
- Provides galvanic isolation between primary and secondary circuits in modem applications
- Supports standard 600 Ohm telecommunication line impedance matching
- Designed for through-hole PCB mounting for robust mechanical connection
Applications
- Modem signal coupling
- Telecommunications interface circuits
- Audio signal transformation in telecom equipment
Procurement Notes
Verify component status carefully as the TTC-125 is listed as obsolete or discontinued by major distributors. Check local availability constraints and ensure alternative sourcing strategies are in place due to limited supply chains. Confirm RoHS compliance status prior to integration into new designs.
Selection Notes
Select this component only if legacy compatibility with 600 Ohm systems is required. Ensure the design accommodates the specific 80mA current rating and 7dBm power limit. Consider the restricted frequency bandwidth when evaluating signal integrity requirements for voice-band applications.
Part Context
The TTC-125 belongs to the Tamura TTC series of audio and signal transformers. This series focuses on telecommunications coupling solutions. The component serves as a specialized transformer for modem interfaces, distinguishing it from general-purpose audio transformers by its specific impedance and current ratings tailored for telecom standards.
Replacement Considerations
No public confirmed substitute part numbers are available. Due to the obsolete status, direct replacements may require functional equivalence testing with other 600:600 Ohm modem transformers from different manufacturers.
