TTC-112 Equivalent & Substitute Parts Reference

Part Overview

The TTC-112 is a telephone coupling transformer manufactured by Tamura, designed for audio frequency applications with a 600:900 ohm impedance configuration. This component is classified as obsolete, indicating it is no longer in active production. Due to its discontinued status, identifying functionally equivalent substitute components is essential for system maintenance, repair, and new design implementations where this transformer specification is required.

Substiute Parts

TTC-112

TamuraIn Stock: 842TTC-112 Datasheet

Current PartRFQ

TY-301P

Triad MagneticsIn Stock: 1175TY-301P Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The TTC-112 is substituted by the TY-301P manufactured by Triad Magnetics based on the following electrical and mechanical compatibility criteria:

Primary Substitution Basis:

• Impedance Configuration: Both components operate with 600 ohm primary and 900 ohm secondary impedance values, establishing direct functional equivalence for impedance matching applications
• Transformer Classification: Both are audio frequency coupling transformers designed for data/voice applications
• Frequency Band: Both operate within telephone and audio frequency ranges suitable for voice transmission
• Electrical Isolation: Both provide galvanic isolation for coupling applications

Regulatory and Compliance Alignment:

• Both components share the same ECCN classification (EAR99)
• Both are subject to identical export control regulations

The TY-301P represents an active production alternative with enhanced specifications and modern compliance certifications, making it suitable for direct replacement in applications where the TTC-112 specification is required.

Parameter Comparison

Engineering Selection Recommendations

For Obsolete Component Replacement:

The TY-301P is the designated substitute for the TTC-112 based on matching impedance specifications (600:900 ohms) and shared application classification as a telephone coupling transformer. The TY-301P maintains active production status, ensuring long-term availability and supply chain continuity.

Compliance Considerations:

The TY-301P provides ROHS3 compliance, representing a modernized alternative to the RoHS non-compliant TTC-112. Both components share identical ECCN classification (EAR99), maintaining regulatory consistency for export and distribution purposes.

Availability and Procurement:

The TTC-112 remains available in inventory (796 units), while the TY-301P offers higher stock levels (1162 units) with active manufacturer support. Selection between these components should be based on project timeline requirements and regulatory compliance mandates for the target application.

Frequently Asked Questions (FAQ)

Q: Can the TY-301P directly replace the TTC-112 in existing designs?

A: Yes. Both components share the same primary and secondary impedance values (600:900 ohms) and are classified as audio frequency coupling transformers for telephone applications. The TY-301P provides documented electrical specifications that align with the TTC-112 functional requirements.

Q: What are the key electrical parameters that determine substitution compatibility?

A: The critical parameters are impedance matching (600 ohm primary, 900 ohm secondary), transformer type classification (audio/voice coupling), and frequency band suitability (telephone frequency range). Both the TTC-112 and TY-301P meet these criteria.

Q: Does the TY-301P require different mounting or termination compared to the TTC-112?

A: The TY-301P uses Through Hole mounting with PC Pin termination. The TTC-112 mounting specifications are not documented. Physical verification of the original component installation is required to confirm mechanical compatibility in legacy applications.

Q: Are there compliance differences between these components?

A: The TY-301P is ROHS3 compliant, while the TTC-112 is RoHS non-compliant. Both share the same ECCN classification (EAR99). New designs should prioritize the TY-301P for regulatory compliance. Existing systems using the TTC-112 may continue operation without compliance modification.

Q: What is the significance of the MSL rating difference?

A: The TTC-112 carries MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. The TY-301P lists MSL as Not Applicable, indicating modern manufacturing processes with inherent moisture resistance. This difference does not affect substitution compatibility.

Q: How do the documented specifications of the TY-301P compare to the TTC-112?

A: The TY-301P provides complete electrical characterization including frequency response (±0.5dB), insertion loss (1dB Typ), return loss (26dB Typ), and operating temperature range (-20°C ~ 85°C). The TTC-112 specifications are not fully documented. The TY-301P specifications represent the performance envelope for this impedance class.