ECS-40-20-1 Equivalent & Substitute Parts

Part Overview

The ECS-40-20-1 is a 4 MHz through-hole crystal oscillator in HC-49/U package with 20pF load capacitance and 100 Ohms equivalent series resistance. This part is classified as Not For New Designs, making identification of active equivalent alternatives essential for ongoing production and maintenance applications. Substitute parts must maintain identical electrical specifications and mechanical compatibility to ensure direct replacement without circuit redesign.

Substiute Parts

ECS-40-20-1

ECS Inc.In Stock: 3487ECS-40-20-1 Datasheet

Current PartRFQ

ECS-40-20-1X

ECS Inc.In Stock: 12860ECS-40-20-1X Datasheet

Parametric EquivalentRFQ

MP040

CTS-Frequency ControlsIn Stock: 4706MP040 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following critical parameters: frequency (4 MHz), frequency tolerance (±30ppm), load capacitance (20pF), ESR (100 Ohms), operating mode (Fundamental), package type (HC-49/U), and mounting configuration (Through Hole). All identified substitutes meet these core electrical and mechanical requirements. Secondary considerations include product status (Active vs. Not For New Designs), RoHS compliance status, and operating temperature range extensions.

Parameter Comparison

Engineering Selection Recommendations

ECS-40-20-1X is the primary parametric equivalent, manufactured by ECS Inc. with identical electrical specifications and mechanical dimensions. This part carries Active product status and ROHS3 compliance, addressing the obsolescence and regulatory limitations of the original ECS-40-20-1.

MP040, manufactured by CTS-Frequency Controls, provides an alternative cross-manufacturer substitute with equivalent electrical performance. This part extends the operating temperature range to -20°C ~ 70°C and maintains ROHS3 compliance. Physical dimensions differ slightly (0.427" L x 0.150" W versus 0.447" L x 0.183" W), though both conform to HC-49/U package specifications and mount identically in through-hole applications.

Both substitutes are suitable for direct replacement in applications where the original ECS-40-20-1 is specified, provided that RoHS compliance requirements and extended temperature performance are acceptable for the target application.

Frequently Asked Questions (FAQ)

Q: Can ECS-40-20-1X be used as a direct replacement for ECS-40-20-1?

A: Yes. ECS-40-20-1X maintains identical electrical parameters (4 MHz, ±30ppm tolerance, 20pF load capacitance, 100 Ohms ESR) and mechanical compatibility (HC-49/U through-hole package). The primary differences are product status (Active vs. Not For New Designs) and RoHS compliance (ROHS3 vs. non-compliant).

Q: What are the physical differences between MP040 and the original ECS-40-20-1?

A: MP040 dimensions are 0.427" L x 0.150" W compared to ECS-40-20-1 at 0.447" L x 0.183" W. Both share identical height (0.530" maximum seated) and HC-49/U package classification. These dimensional variations remain within through-hole PCB footprint tolerances.

Q: Does MP040 offer any performance advantages?

A: MP040 extends the operating temperature range to -20°C ~ 70°C, compared to -10°C ~ 70°C for ECS-40-20-1. All other electrical specifications remain equivalent. This extended lower temperature rating may be beneficial for applications requiring operation below -10°C.

Q: Are both substitutes RoHS compliant?

A: Yes. Both ECS-40-20-1X and MP040 carry ROHS3 compliance status. The original ECS-40-20-1 is RoHS non-compliant, making either substitute necessary for applications subject to RoHS regulatory requirements.

Q: Which substitute should be selected for new designs?

A: ECS-40-20-1X is recommended as the primary choice for new designs, as it maintains manufacturer continuity with ECS Inc. and identical specifications to the original part. MP040 serves as a secondary alternative when cross-manufacturer sourcing or extended temperature performance is required.