ECS-240-S-4 Crystal Equivalent & Substitute Parts

Part Overview

The ECS-240-S-4 is a 24 MHz through-hole crystal oscillator in HC-49/US package with ±30ppm frequency tolerance and 30 Ohms equivalent series resistance. This component operates in fundamental mode across the temperature range of -10°C to 70°C. The part is classified as "Not For New Designs," making identification of active equivalent alternatives essential for ongoing production and maintenance applications where this crystal is currently deployed.

Substiute Parts

ECS-240-S-4

ECS Inc.In Stock: 1175ECS-240-S-4 Datasheet

Current PartRFQ

ECS-240-S-4X

ECS Inc.In Stock: 1644ECS-240-S-4X Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ECS-240-S-4 is determined by strict equivalence across the following critical parameters:

• Frequency: 24 MHz (exact match required)
• Frequency Tolerance: ±30ppm (exact match required)
• ESR: 30 Ohms (exact match required)
• Package / Case: HC-49/US (exact match required)
• Mounting Type: Through Hole (exact match required)
• Operating Temperature Range: -10°C to 70°C (exact match required)
• Load Capacitance Configuration: Series (exact match required)

The ECS-240-S-4X meets all substitution criteria as a parametric equivalent. The primary distinction is product status: ECS-240-S-4X is classified as Active, whereas the original part is Not For New Designs.

Parameter Comparison

Engineering Selection Recommendations

The ECS-240-S-4X is the direct parametric equivalent for the ECS-240-S-4. Both parts share identical electrical and mechanical specifications across all critical parameters. The ECS-240-S-4X offers two significant advantages:

1. Product Status: ECS-240-S-4X is classified as Active, ensuring continued availability and manufacturer support, whereas ECS-240-S-4 is Not For New Designs.

2. Regulatory Compliance: ECS-240-S-4X is ROHS3 Compliant, compared to the non-compliant status of ECS-240-S-4. This distinction is material for applications subject to RoHS regulations.

Both parts maintain identical electrical performance, package dimensions, and thermal operating range. Selection between these parts should be based on supply chain requirements, regulatory compliance mandates, and long-term availability considerations.

Frequently Asked Questions (FAQ)

Q: Can ECS-240-S-4X be used as a direct replacement for ECS-240-S-4?

A: Yes. The ECS-240-S-4X is a parametric equivalent with identical frequency (24 MHz), frequency tolerance (±30ppm), ESR (30 Ohms), package (HC-49/US), and operating temperature range (-10°C to 70°C). All electrical and mechanical specifications match exactly.

Q: What is the difference between ECS-240-S-4 and ECS-240-S-4X?

A: The primary differences are product status and RoHS compliance. ECS-240-S-4 is Not For New Designs and RoHS non-compliant. ECS-240-S-4X is Active and ROHS3 Compliant. Electrical and mechanical parameters are identical.

Q: Are there any package or mounting differences?

A: No. Both parts use the HC-49/US through-hole package with identical dimensions (0.447" L x 0.183" W, 11.35mm x 4.65mm) and maximum seated height (0.138" / 4.60mm).

Q: Does the RoHS compliance difference affect circuit performance?

A: No. RoHS compliance relates to material composition and regulatory requirements, not electrical performance. Both parts deliver identical frequency stability, tolerance, and ESR characteristics.

Q: Which part should be selected for new designs?

A: ECS-240-S-4X should be selected for new designs. It is classified as Active and offers ROHS3 compliance, ensuring long-term availability and regulatory alignment.