ECS-50-S-4 5 MHz Crystal Equivalent & Substitute Parts

Part Overview

The ECS-50-S-4 is a 5 MHz through-hole crystal oscillator in HC-49/US package configuration, designed for fundamental mode operation with 120 Ohms equivalent series resistance. This component is classified as Not For New Designs, indicating it has been superseded in the manufacturer's product line. Identifying equivalent substitute parts is necessary for legacy system maintenance, repair operations, and applications where continued supply of the original part number is unavailable.

Substiute Parts

ECS-50-S-4

ECS Inc.In Stock: 1020ECS-50-S-4 Datasheet

Current PartRFQ

ECS-50-S-4X

ECS Inc.In Stock: 1008ECS-50-S-4X Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ECS-50-S-4 is determined by strict equivalence across the following critical parameters:

• Frequency: 5 MHz (exact match required)
• Frequency Tolerance: ±30ppm (exact match required)
• Frequency Stability: ±50ppm (exact match required)
• ESR: 120 Ohms (exact match required)
• Load Capacitance: Series (exact match required)
• Operating Mode: Fundamental (exact match required)
• Operating Temperature Range: -10°C to 70°C (exact match required)
• Package / Case: HC-49/US (exact match required)
• Mounting Type: Through Hole (exact match required)
• Physical Dimensions: 0.447" L x 0.183" W, Height 0.138" max (exact match required)

The ECS-50-S-4X meets all these criteria and is classified as a parametric equivalent. Substitution is valid only when all electrical and mechanical parameters align with these specifications.

Parameter Comparison

Engineering Selection Recommendations

The ECS-50-S-4X is a direct parametric equivalent to the ECS-50-S-4 across all electrical and mechanical specifications. The primary distinction is product lifecycle status: the ECS-50-S-4 is classified as Not For New Designs, while the ECS-50-S-4X maintains Active status.

The ECS-50-S-4X offers improved regulatory compliance, meeting ROHS3 requirements compared to the non-compliant status of the original part. Both components maintain identical MSL ratings and REACH compliance status.

For applications requiring continued supply or new procurement, the ECS-50-S-4X is the appropriate selection. Pin-for-pin and footprint compatibility is assured due to identical package, mounting type, and physical dimensions.

Frequently Asked Questions (FAQ)

Q: Can the ECS-50-S-4X be used as a direct replacement for the ECS-50-S-4?

A: Yes. The ECS-50-S-4X is a parametric equivalent with identical electrical characteristics (5 MHz frequency, ±30ppm tolerance, ±50ppm stability, 120 Ohms ESR) and mechanical specifications (HC-49/US package, through-hole mounting, identical dimensions). Direct substitution is valid.

Q: What is the difference between the ECS-50-S-4 and ECS-50-S-4X?

A: The components are electrically and mechanically identical. The primary differences are product status (Not For New Designs vs. Active) and RoHS compliance (non-compliant vs. ROHS3 Compliant). The ECS-50-S-4X is the current production equivalent.

Q: Are there any package or footprint differences?

A: No. Both parts use the HC-49/US package with identical physical dimensions: 0.447" L x 0.183" W (11.35mm x 4.65mm) and maximum seated height of 0.138" (4.60mm). PCB footprints are interchangeable.

Q: What is the operating temperature range for these crystals?

A: Both the ECS-50-S-4 and ECS-50-S-4X operate across -10°C to 70°C. Frequency stability of ±50ppm is maintained within this range.

Q: Are moisture sensitivity considerations different between these parts?

A: No. Both components carry MSL Rating 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.