ECS-51-20-1X Crystal Equivalent & Substitute Parts

Part Overview

The ECS-51-20-1X is a 5.068 MHz through-hole crystal oscillator in HC-49/U package, designed for fundamental mode operation with 20pF load capacitance and 50 Ohms equivalent series resistance. This component is classified as Active product status and is RoHS3 compliant. Alternative parts may be required due to inventory constraints, design phase transitions, or supply chain considerations.

Substiute Parts

ECS-51-20-1X

ECS Inc.In Stock: 972ECS-51-20-1X Datasheet

Current PartRFQ

ECS-51-20-1

ECS Inc.In Stock: 1322ECS-51-20-1 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The ECS-51-20-1 qualifies as a parametric equivalent to the ECS-51-20-1X based on the following critical parameters:

• Frequency: 5.068 MHz (identical)
• Frequency Tolerance: ±30ppm (identical)
• Load Capacitance: 20pF (identical)
• ESR: 50 Ohms (identical)
• Operating Mode: Fundamental (identical)
• Package / Case: HC-49/U (identical)
• Mounting Type: Through Hole (identical)
• Operating Temperature Range: -10°C ~ 70°C (identical)
• Physical Dimensions: 0.447" L x 0.183" W (identical)

The substitute part maintains all electrical and mechanical specifications required for direct functional replacement in applications designed for the ECS-51-20-1X.

Parameter Comparison

Engineering Selection Recommendations

The ECS-51-20-1X is the preferred selection for new designs due to its Active product status and RoHS3 compliance. The ECS-51-20-1 substitute part maintains identical electrical and mechanical specifications and is suitable for replacement in existing applications where RoHS3 compliance is not a requirement. The ECS-51-20-1 carries a "Not For New Designs" designation, indicating it should be used only for legacy system support or inventory management purposes.

Frequently Asked Questions (FAQ)

Q: Can ECS-51-20-1 be used as a direct replacement for ECS-51-20-1X?

A: Yes. Both parts share identical frequency (5.068 MHz), frequency tolerance (±30ppm), load capacitance (20pF), ESR (50 Ohms), operating mode (Fundamental), package (HC-49/U), mounting type (Through Hole), operating temperature range (-10°C ~ 70°C), and physical dimensions. Electrical and mechanical compatibility is confirmed.

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

A: The main differences are product status and compliance certification. ECS-51-20-1X is Active and RoHS3 compliant, while ECS-51-20-1 is marked "Not For New Designs" and is RoHS non-compliant.

Q: Are there any package or footprint differences?

A: No. Both parts use the HC-49/U package with identical dimensions of 0.447" L x 0.183" W (11.35mm x 4.65mm) and maximum seated height of 0.530" (13.46mm). PCB footprints are interchangeable.

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

A: ECS-51-20-1X should be selected for new designs due to its Active status and RoHS3 compliance certification.

Q: Can ECS-51-20-1 be used in applications requiring RoHS compliance?

A: No. ECS-51-20-1 is RoHS non-compliant. Applications with RoHS compliance requirements must use ECS-51-20-1X.