ECS-40.3-S-1 Crystal Equivalent & Substitute Parts

Part Overview

The ECS-40.3-S-1 is a 4.032 MHz through-hole crystal oscillator in HC-49/U package configuration, designed for fundamental mode operation across industrial temperature ranges. This part is classified as obsolete, making identification of compatible substitutes essential for ongoing system support and new design implementations. The crystal operates at 4.032 MHz with ±30ppm frequency tolerance and 100 Ohms equivalent series resistance, suitable for timing and frequency control applications requiring this specific frequency standard.

Substiute Parts

ECS-40.3-S-1

ECS Inc.In Stock: 1262ECS-40.3-S-1 Datasheet

Current PartRFQ

ECS-40.3-S-1X

ECS Inc.In Stock: 953ECS-40.3-S-1X Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ECS-40.3-S-1 is determined by strict parametric matching across electrical and mechanical specifications. The following criteria establish valid equivalency:

Electrical Parameters: Frequency must match at 4.032 MHz. Frequency tolerance must remain within ±30ppm. Frequency stability must be ±50ppm. ESR must be 100 Ohms. Operating mode must be fundamental.

Mechanical Parameters: Package type must be HC-49/U. Mounting type must be through hole. Physical dimensions must match: 0.447" L x 0.183" W with maximum seated height of 0.530".

Environmental Parameters: Operating temperature range must span -10°C to 70°C. Load capacitance configuration must be series.

The ECS-40.3-S-1X meets all specified parameters and qualifies as a parametric equivalent substitute.

Parameter Comparison

Engineering Selection Recommendations

The ECS-40.3-S-1X serves as the direct parametric equivalent for the obsolete ECS-40.3-S-1. All electrical specifications, mechanical dimensions, and environmental operating parameters are identical between the two parts.

The primary distinction is product status and regulatory compliance. The ECS-40.3-S-1X is classified as active, ensuring ongoing availability and manufacturing support. The ECS-40.3-S-1X achieves ROHS3 compliance, whereas the original ECS-40.3-S-1 is RoHS non-compliant. Both parts maintain identical REACH and ECCN classifications.

For new designs or system replacements, the ECS-40.3-S-1X is the appropriate selection. For legacy systems currently using the ECS-40.3-S-1, direct substitution with the ECS-40.3-S-1X is electrically and mechanically valid without circuit modification.

Frequently Asked Questions (FAQ)

Q: Can the ECS-40.3-S-1X replace the ECS-40.3-S-1 in existing circuits?

A: Yes. The ECS-40.3-S-1X is a parametric equivalent with identical frequency, tolerance, ESR, operating temperature range, and HC-49/U package configuration. No circuit modifications are required.

Q: What is the difference between the ECS-40.3-S-1 and ECS-40.3-S-1X?

A: The parts are electrically and mechanically identical. The ECS-40.3-S-1X is the active production variant with ROHS3 compliance, while the ECS-40.3-S-1 is obsolete and RoHS non-compliant.

Q: Are the physical dimensions identical?

A: Yes. Both parts share the same HC-49/U package with dimensions of 0.447" L x 0.183" W and maximum seated height of 0.530". PCB footprints and mounting requirements are identical.

Q: What is the frequency tolerance specification?

A: Both parts operate at 4.032 MHz with ±30ppm frequency tolerance and ±50ppm frequency stability across the -10°C to 70°C operating temperature range.

Q: Is the ESR specification the same?

A: Yes. Both the ECS-40.3-S-1 and ECS-40.3-S-1X have 100 Ohms equivalent series resistance in fundamental operating mode with series load capacitance configuration.