ECS-.655-12.5-13 Crystal Equivalent & Substitute Parts

Part Overview

The ECS-.655-12.5-13 is a 65.536 kHz tuning fork crystal designed for through-hole applications in timing and frequency control circuits. This component operates at a fundamental frequency with a load capacitance of 12.5pF and an equivalent series resistance of 50 kOhms. The part is currently classified as "Not For New Designs," which necessitates identification of active equivalent alternatives for ongoing production and new circuit implementations.

Substiute Parts

ECS-.655-12.5-13

ECS Inc.In Stock: 1149ECS-.655-12.5-13 Datasheet

Current PartRFQ

ECS-.655-12.5-13X

ECS Inc.In Stock: 1811ECS-.655-12.5-13X Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ECS-.655-12.5-13 is determined by strict equivalence across the following critical parameters:

• Frequency: 65.536 kHz (exact match required)
• Frequency Tolerance: ±30ppm (exact match required)
• Load Capacitance: 12.5pF (exact match required)
• ESR: 50 kOhms (exact match required)
• Operating Mode: Fundamental (exact match required)
• Operating Temperature Range: -10°C ~ 60°C (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: Cylindrical Can, Radial (exact match required)
• Physical Dimensions: 0.083" Dia x 0.244" L (exact match required)

The ECS-.655-12.5-13X meets all substitution criteria as a parametric equivalent manufactured by ECS Inc. within the ECS-31X series.

Parameter Comparison

Engineering Selection Recommendations

The ECS-.655-12.5-13X is the direct parametric equivalent for the ECS-.655-12.5-13. Selection between these parts should be based on the following factors:

For New Designs: Use ECS-.655-12.5-13X. This part carries Active product status and meets ROHS3 compliance requirements, making it suitable for new circuit implementations and long-term production sustainability.

For Legacy System Maintenance: The ECS-.655-12.5-13 remains available with 1046 units in stock. However, the ECS-.655-12.5-13X provides superior compliance posture and active manufacturer support.

Compliance Considerations: The ECS-.655-12.5-13X is ROHS3 compliant, whereas the original part is RoHS non-compliant. Both parts are REACH Unaffected and classified under ECCN EAR99.

Frequently Asked Questions (FAQ)

Q: Can the ECS-.655-12.5-13X be used as a direct replacement for the ECS-.655-12.5-13?

A: Yes. The ECS-.655-12.5-13X is a parametric equivalent with identical electrical and mechanical specifications across all critical parameters: frequency, tolerance, load capacitance, ESR, operating temperature range, mounting type, and physical dimensions.

Q: What is the primary difference between these two parts?

A: The ECS-.655-12.5-13X is the active production variant with ROHS3 compliance and Active product status. The ECS-.655-12.5-13 is classified as "Not For New Designs" and is RoHS non-compliant.

Q: Are there any package or footprint differences?

A: No. Both parts use identical Cylindrical Can, Radial packaging with dimensions of 0.083" Dia x 0.244" L (2.10mm x 6.20mm). PCB layouts and mechanical mounting are interchangeable.

Q: Which part should be specified for new product designs?

A: Specify ECS-.655-12.5-13X for new designs. This part has Active status, ensuring long-term availability and manufacturer support, and meets current RoHS3 compliance requirements.

Q: Are the electrical characteristics identical?

A: Yes. Both parts operate at 65.536 kHz with ±30ppm tolerance, 12.5pF load capacitance, 50 kOhms ESR, and -10°C ~ 60°C operating temperature range in fundamental mode.