TTC-5019 Equivalent & Substitute Parts Reference

Part Overview

The TTC-5019 is a Tamura audio transformer coupling unit designed for data and voice applications. It features a 600:260 ohm impedance configuration with a 1:1 turns ratio and operates across the 200Hz to 4kHz frequency band. The TTC-5019 is classified as obsolete product status, making identification of compatible substitute components essential for ongoing system maintenance and new design implementations. Substitute parts must maintain electrical compatibility across primary impedance, secondary impedance, turns ratio, isolation voltage, and mounting configuration to ensure functional equivalence in coupling applications.

Substiute Parts

TTC-5019

TamuraIn Stock: 818TTC-5019 Datasheet

Current PartRFQ

TTC-5020

TamuraIn Stock: 1367TTC-5020 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute compatibility for the TTC-5019 is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Turns Ratio: Must be 1:1 to maintain voltage transformation characteristics
• Primary Impedance: Must be 600 ohms to match source impedance requirements
• Transformer Type: Must be Data/Voice Coupling classification
• Mounting Type: Must be Through Hole to ensure PCB compatibility
• Physical Dimensions: Must match 0.886" L x 0.909" W footprint and 0.543" maximum seated height
• Termination Style: Must be PC Pin for direct board connection
• Isolation Voltage: Must meet or exceed 1875VRMS @ 1 Second rating
• Approval Certifications: Must maintain CSA-C22.2 No. 950-95 and UL1950 compliance

Secondary Impedance Tolerance: Secondary impedance values between 260 ohms and 301 ohms are acceptable within the data/voice coupling application range, provided the frequency response characteristics remain suitable for the intended signal bandwidth.

Frequency Range Consideration: Substitute parts operating within overlapping frequency bands (200Hz to 4kHz minimum coverage) are functionally equivalent for audio coupling applications.

Parameter Comparison

Engineering Selection Recommendations

TTC-5020 as Primary Substitute:

The TTC-5020 is the direct substitute for the obsolete TTC-5019. Both components share identical primary impedance (600 ohms), turns ratio (1:1), physical dimensions, mounting configuration, and regulatory certifications (CSA-C22.2 No. 950-95, UL1950). The TTC-5020 maintains active product status, ensuring ongoing availability and supply chain continuity.

Electrical Performance Advantages:

The TTC-5020 demonstrates improved electrical characteristics compared to the TTC-5019:

• Lower DC resistance in both primary and secondary windings (152 ohms versus 170 ohms)
• Reduced insertion loss (3.75dB maximum versus 4dB maximum at 1kHz)
• Tighter frequency response specification (±1dB to ±4dB range)

Secondary Impedance Consideration:

The TTC-5020 secondary impedance is 301 ohms compared to the TTC-5019 specification of 260 ohms. This 41-ohm difference remains within acceptable tolerance for data and voice coupling applications. The overlapping frequency range (300Hz to 3.5kHz for TTC-5020 versus 200Hz to 4kHz for TTC-5019) is suitable for standard telecommunications and audio coupling circuits.

Compliance and Certification:

Both components maintain identical isolation voltage ratings (1875VRMS @ 1 Second) and regulatory approvals. The TTC-5020 is RoHS compliant, providing additional environmental compliance for new designs.

Frequently Asked Questions (FAQ)

Q: Can the TTC-5020 directly replace the TTC-5019 in existing circuit designs?

A: Yes. The TTC-5020 is electrically and mechanically compatible with the TTC-5019. Both components feature identical primary impedance (600 ohms), turns ratio (1:1), physical footprint, mounting type (Through Hole), and regulatory certifications. The secondary impedance difference (301 ohms versus 260 ohms) and frequency range variation (300Hz to 3.5kHz versus 200Hz to 4kHz) remain within acceptable parameters for data and voice coupling applications.

Q: What is the significance of the secondary impedance difference between TTC-5019 and TTC-5020?

A: The TTC-5020 secondary impedance of 301 ohms represents a 15.8% increase from the TTC-5019 specification of 260 ohms. In coupling transformer applications, this impedance variation affects load matching characteristics. For circuits designed with impedance tolerance margins typical in voice and data applications, this difference is functionally acceptable. Circuit designers should verify load impedance compatibility with the 301-ohm secondary specification.

Q: How do the frequency response specifications compare?

A: The TTC-5019 specifies ±2.5dB frequency response, while the TTC-5020 specifies ±1dB to ±4dB. The TTC-5020 offers a tighter response specification in the lower frequency range (±1dB) but allows up to ±4dB at higher frequencies. Both components operate within overlapping frequency bands suitable for voice and data transmission. The TTC-5020 frequency range (300Hz to 3.5kHz) is narrower than the TTC-5019 (200Hz to 4kHz) but remains adequate for standard telecommunications applications.

Q: What are the DC resistance implications for circuit design?

A: The TTC-5020 exhibits lower DC resistance in both primary and secondary windings (152 ohms each) compared to the TTC-5019 (170 ohms each). Lower DC resistance reduces resistive losses and heat generation, improving overall transformer efficiency. This characteristic makes the TTC-5020 preferable for power-sensitive applications. The 18-ohm reduction in primary DCR represents approximately a 10.6% improvement in primary winding efficiency.

Q: Are the physical dimensions and mounting configurations identical?

A: Yes. Both the TTC-5019 and TTC-5020 share identical physical dimensions (0.886" L x 0.909" W / 22.50mm x 23.10mm), maximum seated height (0.543" / 13.80mm), mounting type (Through Hole), and termination style (PC Pin). Direct PCB layout compatibility is maintained without modification.

Q: What regulatory certifications apply to both components?

A: Both the TTC-5019 and TTC-5020 maintain identical regulatory approvals: CSA-C22.2 No. 950-95 and UL1950. The TTC-5020 additionally carries RoHS compliance certification, providing enhanced environmental compliance for new product designs subject to RoHS requirements.

Q: Why is the TTC-5019 classified as obsolete?

A: The TTC-5019 is no longer in active production. The TTC-5020 represents the current active equivalent in the Tamura TTC series, offering improved electrical performance and ongoing supply availability. For new designs and component replenishment, the TTC-5020 is the recommended selection.

Q: What insertion loss difference exists between these components?

A: The TTC-5020 insertion loss is 3.75dB maximum at 1kHz, compared to 4dB maximum for the TTC-5019. This 0.25dB improvement represents approximately 5.9% lower signal attenuation, contributing to improved signal integrity in coupling applications.