ECS-50-20-1 5 MHz Crystal Equivalent & Substitute Parts

Part Overview

The ECS-50-20-1 is a 5 MHz through-hole crystal oscillator in HC-49/U package with 20pF load capacitance and 50 Ohms equivalent series resistance. This part is classified as "Not For New Designs," indicating it has reached end-of-life status. Finding equivalent substitute parts is necessary for maintenance, repair, and legacy system support where continued supply of the original part cannot be guaranteed.

Substiute Parts

ECS-50-20-1

ECS Inc.In Stock: 1492ECS-50-20-1 Datasheet

Current PartRFQ

ECS-50-20-1X

ECS Inc.In Stock: 1180ECS-50-20-1X Datasheet

Parametric EquivalentRFQ

MP05A

CTS-Frequency ControlsIn Stock: 100411MP05A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ECS-50-20-1 is determined by strict matching of the following critical parameters:

• Frequency: 5 MHz (exact match required)
• Frequency Tolerance: ±30ppm (exact match required)
• Load Capacitance: 20pF (exact match required)
• ESR: 50 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)

Two substitute parts meet these criteria: ECS-50-20-1X (parametric equivalent from the same manufacturer) and MP05A (direct manufacturer equivalent from CTS-Frequency Controls). Both parts satisfy all critical electrical and mechanical parameters required for direct substitution.

Parameter Comparison

Engineering Selection Recommendations

Both ECS-50-20-1X and MP05A are qualified substitutes based on electrical and mechanical parameter equivalence. Selection between them should consider the following factors:

ECS-50-20-1X: This part maintains manufacturer continuity with the original ECS Inc. design while offering improved product status (Active vs. Not For New Designs) and ROHS3 compliance. The operating temperature range remains -10°C ~ 70°C, matching the original specification.

MP05A: This part is supplied by CTS-Frequency Controls and offers the widest operating temperature range (-20°C ~ 70°C), providing additional thermal margin. It carries ROHS3 compliance and has the highest inventory availability (100,400 pcs). Physical dimensions differ slightly (0.427" L x 0.150" W vs. 0.447" L x 0.183" W), though both fit the HC-49/U package standard.

Both substitutes are ROHS3 compliant and REACH unaffected, addressing modern regulatory requirements that the original ECS-50-20-1 does not meet.

Frequently Asked Questions (FAQ)

Q: Can ECS-50-20-1X and MP05A be used interchangeably with ECS-50-20-1?

A: Yes. Both substitute parts match all critical electrical parameters (frequency, tolerance, load capacitance, ESR, operating mode) and mechanical specifications (HC-49/U package, through-hole mounting). They are direct functional equivalents.

Q: What is the difference between ECS-50-20-1 and ECS-50-20-1X?

A: The primary differences are product status and compliance. ECS-50-20-1X is an active product with ROHS3 compliance, while ECS-50-20-1 is not for new designs and RoHS non-compliant. All electrical and mechanical parameters are identical.

Q: Does MP05A have any dimensional differences?

A: MP05A has slightly different length and width dimensions (0.427" L x 0.150" W compared to 0.447" L x 0.183" W for the original part). However, both conform to the HC-49/U package standard and will fit standard HC-49/U footprints. Height-seated maximum is identical at 0.530".

Q: Which substitute offers the best temperature performance?

A: MP05A provides the widest operating temperature range (-20°C ~ 70°C) compared to the original part and ECS-50-20-1X (-10°C ~ 70°C). This offers 10°C additional margin at the lower temperature limit.

Q: Are both substitutes RoHS compliant?

A: Yes. Both ECS-50-20-1X and MP05A are ROHS3 compliant. The original ECS-50-20-1 is RoHS non-compliant.

Q: What inventory levels are available for each substitute?

A: ECS-50-20-1X has 1,170 pcs available. MP05A has significantly higher availability at 100,400 pcs.