TTC-142-2 Equivalent & Substitute Parts Reference

Part Overview

The TTC-142-2 is a 600 Ohm audio transformer manufactured by Tamura, designed for data and voice coupling applications. This through-hole mounted component operates across the 300Hz to 3.5kHz frequency range with a 1:1.04 turns ratio and is actively produced. The transformer provides 1500VRMS isolation and meets CSA-C22.2 No. 66-M1988 and UL1459 standards. Equivalent parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility permits substitution within specified electrical and mechanical parameters.

Substiute Parts

TTC-142-2

TamuraIn Stock: 746TTC-142-2 Datasheet

Current PartRFQ

TY-403P

Triad MagneticsIn Stock: 3009TY-403P Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TTC-142-2 is permissible when the alternative component meets the following criteria:

Primary Matching Parameters:

• Impedance (Primary and Secondary): Both must be 600 Ohms
• Transformer Type: Data/Voice Coupling classification
• Frequency Range: 300Hz ~ 3.5kHz operational band
• Mounting Type: Through Hole configuration
• Termination Style: PC Pin connection method

Secondary Compatibility Parameters:

• Voltage Isolation: Minimum 1500V rating
• Turns Ratio: Acceptable within audio coupling tolerance for voice/data applications
• Product Status: Active manufacturing status preferred for long-term availability
• RoHS Compliance: Compliance with current environmental standards

The TY-403P from Triad Magnetics satisfies all primary matching parameters and secondary compatibility requirements, establishing it as a valid substitute for the TTC-142-2.

Parameter Comparison

Engineering Selection Recommendations

TTC-142-2 (Primary Component): The TTC-142-2 remains the specified component for applications requiring the exact 1:1.04 turns ratio and CSA-C22.2 No. 66-M1988 / UL1459 certification. This component is actively manufactured and maintains RoHS compliance. Selection is appropriate when design specifications explicitly reference Tamura components or when the precise turns ratio is critical to circuit performance.

TY-403P (Substitute Component): The TY-403P is substitutable when the application permits a 1.81:1 turns ratio variation and does not require specific Tamura certifications. The TY-403P offers improved insertion loss (1.75dB typical versus 1.9dB maximum) and superior return loss (15dB typical versus 14dB minimum). Both components maintain identical 600 Ohm impedance matching, 1500V isolation, and 300Hz to 3.5kHz frequency operation. The TY-403P features a split secondary winding configuration and is ROHS3 compliant with REACH unaffected status. Physical dimensions differ marginally (20.70 x 31.75mm versus 20.30 x 30.50mm), requiring PCB layout verification for through-hole mounting compatibility.

Selection Criteria:

• Choose TTC-142-2 when exact turns ratio specification or Tamura certification is mandatory
• Choose TY-403P when turns ratio flexibility exists and improved insertion/return loss performance is beneficial
• Verify PCB footprint clearance for both components due to dimensional differences
• Both components are active products with established supply availability

Frequently Asked Questions (FAQ)

Q: Can the TY-403P directly replace the TTC-142-2 in all applications?

A: Direct replacement is possible only when the application circuit tolerates the turns ratio difference (1.81:1 versus 1:1.04). The impedance matching (600 Ohm primary and secondary) and frequency response characteristics remain compatible. Circuit simulation or prototype testing is necessary to confirm performance when turns ratio is a design-critical parameter.

Q: What is the significance of the split secondary winding in the TY-403P?

A: The TY-403P secondary winding is split into two 56 Ohm sections, providing design flexibility for center-tap or dual-output configurations. The TTC-142-2 secondary is a single 95 Ohm winding. This structural difference does not affect basic impedance matching but may influence circuit topology options.

Q: Are there physical mounting differences between these components?

A: Yes. The TTC-142-2 measures 20.30 x 30.50mm with 12.70mm seated height, while the TY-403P measures 20.70 x 31.75mm with 13.46mm seated height. Both use through-hole PC pin termination. PCB layout verification is required to confirm clearance and mounting compatibility, particularly in space-constrained designs.

Q: Which component has better electrical performance?

A: The TY-403P demonstrates superior insertion loss (1.75dB typical) compared to the TTC-142-2 (1.9dB maximum) and superior return loss (15dB typical versus 14dB minimum). Both components operate within the 300Hz to 3.5kHz frequency band with equivalent isolation voltage (1500V).

Q: What are the compliance differences?

A: The TTC-142-2 carries CSA-C22.2 No. 66-M1988 and UL1459 certifications. The TY-403P does not list specific agency approvals but is ROHS3 compliant with REACH unaffected status. Applications requiring specific regulatory certifications must retain the TTC-142-2.

Q: Are both components currently available?

A: Yes. The TTC-142-2 has 686 pieces in stock (Tamura), and the TY-403P has 2952 pieces in stock (Triad Magnetics). Both maintain active product status with ongoing manufacturing support.

Q: What is the frequency response difference between these transformers?

A: The TTC-142-2 specifies -2.5dB to 0.3dB frequency response, while the TY-403P specifies ±0.5dB. The TY-403P exhibits tighter frequency response tolerance across the 300Hz to 3.5kHz band, indicating more consistent performance across the operational frequency range.