ECS-SR1-4.19-A-TR Ceramic Resonator Equivalent & Substitute Parts

Part Overview

The ECS-SR1-4.19-A-TR is a 4.19 MHz ceramic resonator designed for surface mount applications. This part operates across a temperature range of -20°C to 80°C with a frequency stability of ±0.3% and impedance of 40 Ohms. The product is currently in Last Time Buy status, indicating that the manufacturer has announced end-of-life production. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring this frequency specification.

Substiute Parts

ECS-SR1-4.19-A-TR

ECS Inc.In Stock: 1056ECS-SR1-4.19-A-TR Datasheet

Current PartRFQ

ECS-CTA-4.19-TR

ECS Inc.In Stock: 958ECS-CTA-4.19-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of ceramic resonators is determined by the following critical parameters:

Frequency Match: The substitute part must operate at the same center frequency (4.19 MHz) to maintain circuit timing and synchronization requirements.

Frequency Stability: The ECS-SR1-4.19-A-TR specifies ±0.3% stability. The substitute part ECS-CTA-4.19-TR provides ±0.2% stability, which is tighter and therefore acceptable for applications requiring the original specification.

Impedance Compatibility: The original part specifies 40 Ohms impedance. The substitute part specifies 30 Ohms impedance. Impedance differences affect circuit loading and may require circuit design verification.

Operating Temperature Range: The original part operates from -20°C to 80°C. The substitute part operates from -25°C to 85°C, providing an extended temperature range that encompasses the original specification.

Mounting and Package: Both parts are surface mount ceramic resonators in 2-SMD configurations, ensuring mechanical and electrical compatibility at the board level.

Regulatory Compliance: Both parts maintain RoHS3 compliance and MSL Level 1 rating, ensuring environmental and handling compatibility.

Parameter Comparison

Engineering Selection Recommendations

The ECS-CTA-4.19-TR is the manufacturer-recommended substitute for the ECS-SR1-4.19-A-TR. The substitute part offers improved frequency stability (±0.2% versus ±0.3%), an extended operating temperature range (-25°C to 85°C versus -20°C to 80°C), and Active product status ensuring continued availability and supply chain support.

The primary design consideration is the impedance difference: 30 Ohms versus 40 Ohms. This impedance variation may affect circuit loading characteristics and should be evaluated within the context of the specific application circuit design. Both parts maintain identical frequency tolerance (±0.5%), RoHS3 compliance, and MSL Level 1 rating.

The substitute part features a smaller physical footprint (6.00mm x 3.00mm versus 7.50mm x 3.30mm), which may provide layout advantages in space-constrained applications. Both parts are suitable for surface mount assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the ECS-CTA-4.19-TR directly replace the ECS-SR1-4.19-A-TR without circuit modification?

A: Both parts operate at 4.19 MHz with identical frequency tolerance (±0.5%). The substitute part provides tighter frequency stability (±0.2% versus ±0.3%) and an extended temperature range. However, the impedance difference (30 Ohms versus 40 Ohms) may require circuit evaluation to confirm compatibility with the existing load network.

Q: What is the significance of the impedance difference between these parts?

A: Impedance affects the loading characteristics of the resonator within the circuit. The 10 Ohm difference (40 Ohms to 30 Ohms) may influence frequency accuracy and circuit performance. Circuit designers should verify that the substitute part's impedance is compatible with the existing oscillator or timing circuit design.

Q: Are there physical compatibility concerns with the smaller package size of the substitute part?

A: The ECS-CTA-4.19-TR has a smaller footprint (6.00mm x 3.00mm versus 7.50mm x 3.30mm) and slightly lower height (1.70mm versus 1.80mm). These dimensional differences are within typical surface mount assembly tolerances and should not present mechanical compatibility issues. PCB layout may require minor adjustment to accommodate the smaller package.

Q: Why is the original part listed as Last Time Buy?

A: Last Time Buy status indicates that the manufacturer has announced end-of-life production for the ECS-SR1-4.19-A-TR. The ECS-CTA-4.19-TR is the recommended active alternative, ensuring continued product availability and manufacturer support.

Q: Are both parts compliant with current environmental and regulatory standards?

A: Both parts are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity rating, meeting current environmental and handling requirements for surface mount components.