TTC-110 Equivalent & Substitute Parts Reference

Part Overview

The TTC-110 is a 600 Ohm audio transformer manufactured by Tamura, designed for data/voice coupling applications in telecommunications equipment. This through-hole mounted transformer operates across the 300Hz to 3.5kHz frequency range with a 1:1.033 turns ratio and provides 1500VRMS isolation at 1 minute. The part is currently active in production with 847 pieces in stock.

Substitute parts are identified when equivalent electrical performance can be achieved within the specified parameter tolerances for this transformer category, particularly when the primary part becomes unavailable or when alternative sourcing is required for supply chain optimization.

Substiute Parts

TTC-110

TamuraIn Stock: 914TTC-110 Datasheet

Current PartRFQ

TY-304P

Triad MagneticsIn Stock: 6355TY-304P Datasheet

SimilarRFQ

TY-305P

Triad MagneticsIn Stock: 812TY-305P Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TTC-110 is determined by the following critical parameters:

Primary Matching Criteria:

• Transformer Type: Data/Voice Coupling
• Frequency Range: 300Hz ~ 3.5kHz minimum coverage
• Mounting Type: Through Hole
• Impedance Configuration: 600 Ohm primary and secondary

Secondary Compatibility Factors:

• Turns Ratio tolerance within ±10% of 1:1.033
• Frequency Response: ±0.5dB or better
• Voltage Isolation: 1500V minimum
• Insertion Loss: 1.5dB maximum at 1kHz
• Power Level range: -45dB to 7dB minimum
• Termination Style: PC Pin

The TY-304P and TY-305P from Triad Magnetics meet the core electrical and mechanical requirements for substitution. Both parts maintain the 600 Ohm impedance configuration, operate within the 300Hz to 3.5kHz frequency band, provide equivalent isolation voltage, and use identical through-hole PC pin termination. Variations in turns ratio, DC resistance, and insertion loss remain within acceptable engineering tolerances for data/voice coupling applications.

Parameter Comparison

Engineering Selection Recommendations

TY-304P Selection Criteria: The TY-304P offers the closest electrical match to the TTC-110 with a turns ratio of 1:1.05 compared to 1:1.033, representing a 1.6% deviation. This part delivers superior insertion loss performance at 1dB typical versus the TTC-110's 1.2dB maximum specification. The TY-304P maintains 600CT impedance configuration and identical frequency response characteristics. This substitute is suitable for applications where the primary part is unavailable and insertion loss optimization is beneficial. Both parts carry active product status and current manufacturing support.

TY-305P Selection Criteria: The TY-305P provides an alternative with a 1:0.90 turns ratio, representing an 8.7% deviation from the TTC-110 specification. This part features higher primary DC resistance at 108 Ohm and increased insertion loss at 1.5dB typical. The TY-305P is physically larger (1.650" L x 1.375" W versus 0.799" L x 0.650" W) and carries a higher DC current rating of 100mA. This substitute is applicable in applications where the larger form factor and higher current capacity provide system-level advantages. Both substitute parts maintain ROHS3 compliance and active production status.

Compliance Considerations: All three transformers maintain active product status with current manufacturing support. The TTC-110 carries CSA-C22.2 No. 66-M1988 and UL1459 approvals. The Triad Magnetics substitutes (TY-304P and TY-305P) do not list specific approval agencies in the provided data but carry ROHS3 compliance and REACH Unaffected status. System designers must verify approval requirements for their specific application before final component selection.

Frequently Asked Questions (FAQ)

Q: Can TY-304P and TY-305P be used interchangeably with TTC-110?

A: Both Triad Magnetics parts meet the core electrical requirements for data/voice coupling transformers in the 300Hz to 3.5kHz frequency band. However, they are not direct 1:1 replacements. The TY-304P has a turns ratio of 1:1.05 versus TTC-110's 1:1.033, and the TY-305P has a 1:0.90 ratio. Circuit designers must verify that the turns ratio variation and insertion loss differences are acceptable for their specific application before substitution.

Q: What are the key impedance differences between these parts?

A: The TTC-110 specifies 600 Ohm primary and secondary impedance. The TY-304P uses 600CT (center-tapped) impedance configuration, which affects circuit topology compatibility. The TY-305P maintains standard 600 Ohm impedance matching the TTC-110. Applications requiring center-tap functionality must use the TY-304P; standard impedance matching applications can use either the TTC-110 or TY-305P.

Q: How do the physical dimensions affect PCB layout?

A: The TTC-110 measures 0.799" L x 0.650" W with a seated height of 0.736". The TY-304P is slightly smaller at 0.790" L x 0.812" W with 0.740" height. The TY-305P is significantly larger at 1.650" L x 1.375" W with 0.680" height. PCB designs with space constraints may not accommodate the TY-305P without layout modifications. All three parts use through-hole PC pin termination compatible with standard PCB footprints.

Q: What insertion loss differences should be considered?

A: The TTC-110 specifies 1.2dB maximum insertion loss at 1kHz. The TY-304P delivers 1dB typical insertion loss, providing better performance. The TY-305P specifies 1.5dB typical insertion loss, representing a 0.3dB increase. For audio coupling applications with tight insertion loss budgets, the TY-304P is preferred. The TY-305P remains acceptable for applications with 1.5dB insertion loss tolerance.

Q: Are there operating temperature considerations?

A: The TTC-110 does not specify an operating temperature range in the provided data. The TY-304P and TY-305P both specify -20°C to 85°C operating temperature. Applications requiring operation outside this range must use the TTC-110 or obtain extended temperature specifications from manufacturers. For standard telecommunications equipment operating within -20°C to 85°C, both Triad Magnetics substitutes are suitable.

Q: What is the significance of the DC resistance differences?

A: The TTC-110 has 36 Ohm primary and 50 Ohm secondary DC resistance. The TY-304P has 42 Ohm primary and 60 Ohm secondary resistance. The TY-305P has 108 Ohm primary and 61 Ohm secondary resistance. Higher DC resistance increases power dissipation and may affect impedance matching in high-current applications. The TY-305P's 108 Ohm primary resistance is significantly higher and suitable only for applications with 100mA or lower DC current requirements.

Q: Do all parts meet RoHS compliance requirements?

A: The TTC-110 is RoHS Compliant. Both TY-304P and TY-305P are ROHS3 Compliant, representing a more recent compliance standard. All three parts are suitable for RoHS-regulated applications. The Triad Magnetics parts additionally carry REACH Unaffected status, providing additional environmental compliance documentation.