ECS-20-20-1 Equivalent & Substitute Parts

Part Overview

The ECS-20-20-1 is a 2 MHz through-hole crystal oscillator in HC-49/U package with 20pF load capacitance and 500 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 characteristics and mechanical compatibility to ensure direct replacement without circuit redesign.

Substiute Parts

ECS-20-20-1

ECS Inc.In Stock: 1611ECS-20-20-1 Datasheet

Current PartRFQ

ECS-20-20-1X

ECS Inc.In Stock: 21231ECS-20-20-1X Datasheet

Parametric EquivalentRFQ

MP020S

CTS-Frequency ControlsIn Stock: 4800MP020S Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following critical parameters:

• Frequency: 2 MHz (exact match required)
• Frequency Tolerance: ±30ppm (exact match required)
• Load Capacitance: 20pF (exact match required)
• ESR: 500 Ohms (exact match required)
• Operating Mode: Fundamental (exact match required)
• Package / Case: HC-49/U (exact match required)
• Mounting Type: Through Hole (exact match required)

All identified substitute parts meet these criteria. Variations in operating temperature range, physical dimensions within tolerance, and product status do not affect electrical substitutability but may influence procurement decisions based on application requirements and compliance needs.

Parameter Comparison

Engineering Selection Recommendations

Both ECS-20-20-1X and MP020S are electrically and mechanically equivalent to ECS-20-20-1 based on all critical substitution parameters. Selection between alternatives should be based on the following factors:

ECS-20-20-1X is the direct parametric equivalent from the original manufacturer ECS Inc., maintaining the same series designation (HC-49UX) with active product status and ROHS3 compliance. This option provides continuity with the original design source.

MP020S from CTS-Frequency Controls offers equivalent electrical performance with an extended lower operating temperature limit (-20°C vs. -10°C), ROHS3 compliance, and active product status. Physical dimensions differ slightly within HC-49/U package tolerance specifications.

Both substitute parts are ROHS3 compliant, addressing the non-compliance status of the original ECS-20-20-1. Both maintain REACH Unaffected and EAR99 classification status.

Frequently Asked Questions (FAQ)

Q: Can ECS-20-20-1X and MP020S be used interchangeably with ECS-20-20-1?

A: Yes. Both parts meet all critical electrical and mechanical substitution parameters: 2 MHz frequency, ±30ppm tolerance, 20pF load capacitance, 500 Ohms ESR, fundamental mode operation, and HC-49/U through-hole package. Direct replacement is possible without circuit modification.

Q: What is the difference between ECS-20-20-1X and MP020S?

A: Both are electrically equivalent. ECS-20-20-1X is from the original manufacturer ECS Inc. with identical operating temperature range (-10°C ~ 70°C). MP020S from CTS-Frequency Controls extends the lower temperature limit to -20°C and has slightly different physical dimensions within HC-49/U package specifications. Both are ROHS3 compliant and active products.

Q: Why is ECS-20-20-1 marked "Not For New Designs"?

A: This designation indicates the part is obsolete or being phased out by the manufacturer. Active equivalent alternatives (ECS-20-20-1X and MP020S) should be used for new designs and ongoing production to ensure long-term supply availability.

Q: Are there compliance differences between the three parts?

A: ECS-20-20-1 is RoHS non-compliant. Both ECS-20-20-1X and MP020S are ROHS3 compliant. All three maintain REACH Unaffected status and EAR99 classification. Applications requiring RoHS compliance must use ECS-20-20-1X or MP020S.

Q: Do physical dimension differences affect substitution?

A: No. ECS-20-20-1 and ECS-20-20-1X share identical dimensions (0.447" L x 0.183" W, 0.530" max height). MP020S has slightly different length and width (0.427" L x 0.150" W) but maintains the same maximum height (0.530") and HC-49/U package classification. All three fit standard HC-49/U footprints.

Q: Which substitute part should be selected for temperature-critical applications?

A: MP020S supports extended lower temperature operation (-20°C ~ 70°C) compared to ECS-20-20-1 and ECS-20-20-1X (-10°C ~ 70°C). For applications requiring operation below -10°C, MP020S is the appropriate selection.