ECS-51-S-1 5.068 MHz Crystal Equivalent & Substitute Parts

Part Overview

The ECS-51-S-1 is a 5.068 MHz through-hole crystal oscillator in HC-49/U package with ±30ppm frequency tolerance and 50 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. The part operates in fundamental mode across the -10°C to 70°C temperature range with series load capacitance configuration.

Substiute Parts

ECS-51-S-1

ECS Inc.In Stock: 864ECS-51-S-1 Datasheet

Current PartRFQ

ECS-51-S-1X

ECS Inc.In Stock: 936ECS-51-S-1X Datasheet

Parametric EquivalentRFQ

MP050

CTS-Frequency ControlsIn Stock: 1053MP050 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ECS-51-S-1 is determined by strict alignment of the following parameters:

• Frequency: 5.068 MHz (exact match required)
• Frequency Tolerance: ±30ppm (exact match required)
• ESR: 50 Ohms (exact match required)
• Load Capacitance: Series (exact match required)
• Operating Mode: Fundamental (exact match required)
• Package / Case: HC-49/U (exact match required)
• Mounting Type: Through Hole (exact match required)

Two substitute parts meet these criteria: ECS-51-S-1X (parametric equivalent from ECS Inc.) and MP050 (direct equivalent from CTS-Frequency Controls). Both maintain identical electrical specifications and package configuration, enabling direct substitution in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

For applications currently using ECS-51-S-1, transition to ECS-51-S-1X or MP050 is supported by product status and compliance considerations:

ECS-51-S-1X maintains manufacturer continuity with ECS Inc. and achieves ROHS3 compliance. The series designation change from HC-49U to HC-49UX reflects manufacturing updates while preserving electrical and mechanical compatibility. This option is preferred for designs requiring single-source supply chain management.

MP050 from CTS-Frequency Controls provides an alternative source with ROHS3 compliance and extended lower operating temperature limit (-20°C vs. -10°C). Physical dimensions show minor variation (0.427" L x 0.150" W vs. 0.447" L x 0.183" W), though both conform to HC-49/U package specification and maintain identical height-seated maximum of 0.530".

Both substitutes eliminate the "Not For New Designs" status constraint and provide RoHS3 compliance, addressing regulatory requirements of the original part.

Frequently Asked Questions (FAQ)

Q: Can ECS-51-S-1X and MP050 be used interchangeably with ECS-51-S-1?

A: Yes. Both parts match the critical electrical parameters (5.068 MHz frequency, ±30ppm tolerance, 50 Ohms ESR, series load capacitance, fundamental mode) and package specification (HC-49/U through-hole). Electrical performance in the circuit is equivalent.

Q: What is the difference between ECS-51-S-1 and ECS-51-S-1X?

A: The parts are electrically and mechanically identical. The series designation change (HC-49U to HC-49UX) reflects ECS Inc. manufacturing updates. ECS-51-S-1X is active production status with ROHS3 compliance, while ECS-51-S-1 is obsolete (Not For New Designs) and RoHS non-compliant.

Q: Does MP050 have any physical differences from ECS-51-S-1?

A: MP050 has slightly different length and width dimensions (0.427" L x 0.150" W vs. 0.447" L x 0.183" W), but both conform to HC-49/U package specification. Height-seated maximum is identical at 0.530". PCB footprint compatibility is maintained.

Q: What is the temperature range difference between ECS-51-S-1X and MP050?

A: ECS-51-S-1X operates -10°C to 70°C. MP050 extends the lower limit to -20°C. For applications requiring operation below -10°C, MP050 is the appropriate selection.

Q: Are both substitutes RoHS compliant?

A: Yes. Both ECS-51-S-1X and MP050 are ROHS3 compliant. The original ECS-51-S-1 is RoHS non-compliant, making either substitute necessary for RoHS-regulated applications.

Q: Can I use these parts in new designs?

A: ECS-51-S-1X and MP050 are both active production parts suitable for new designs. ECS-51-S-1 is designated "Not For New Designs" and should not be selected for new applications.