ECS-73-20-1 Crystal Equivalent & Substitute Parts

Part Overview

The ECS-73-20-1 is a 7.3728 MHz through-hole crystal oscillator in HC-49/U package with 20pF load capacitance and 40 Ohms equivalent series resistance. This component is classified as Not For New Designs, indicating it has been superseded in the manufacturer's product line. Finding equivalent substitute parts is necessary for maintenance, repair, and legacy system support where this specific frequency and package configuration is required.

Substiute Parts

ECS-73-20-1

ECS Inc.In Stock: 1138ECS-73-20-1 Datasheet

Current PartRFQ

ECS-73-20-1X

ECS Inc.In Stock: 33506ECS-73-20-1X Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the ECS-73-20-1 is determined by strict equivalence across the following critical parameters:

• Frequency: 7.3728 MHz (exact match required)
• Frequency Tolerance: ±30ppm (exact match required)
• Load Capacitance: 20pF (exact match required)
• ESR: 40 Ohms (exact match required)
• Package / Case: HC-49/U (exact match required)
• Mounting Type: Through Hole (exact match required)
• Operating Temperature Range: -10°C ~ 70°C (minimum required)
• Operating Mode: Fundamental (exact match required)

The ECS-73-20-1X meets all these criteria and qualifies as a parametric equivalent substitute. The primary distinction between the main part and its substitute is product status and compliance certification.

Parameter Comparison

Engineering Selection Recommendations

The ECS-73-20-1X is the direct parametric equivalent for the ECS-73-20-1. All electrical and mechanical specifications are identical. The ECS-73-20-1X is the preferred selection because it carries Active product status, indicating ongoing manufacturer support and availability. Additionally, the ECS-73-20-1X is ROHS3 compliant, whereas the original ECS-73-20-1 is RoHS non-compliant. For applications subject to RoHS regulations or requiring components from active product lines, the ECS-73-20-1X is the appropriate substitute.

Frequently Asked Questions (FAQ)

Q: Can the ECS-73-20-1X be used as a direct replacement for the ECS-73-20-1?

A: Yes. The ECS-73-20-1X is a parametric equivalent with identical electrical and mechanical specifications. Both parts operate at 7.3728 MHz with ±30ppm tolerance, 20pF load capacitance, 40 Ohms ESR, and HC-49/U through-hole package. They are electrically and mechanically interchangeable.

Q: What is the difference between these two parts?

A: The primary differences are product status and compliance certification. The ECS-73-20-1 is classified as Not For New Designs and is RoHS non-compliant. The ECS-73-20-1X is an Active product with ROHS3 compliance. Both parts are otherwise identical in performance and physical characteristics.

Q: Are there any package or mounting differences?

A: No. Both parts use the HC-49/U through-hole package with identical dimensions: 0.447" L x 0.183" W (11.35mm x 4.65mm) and maximum seated height of 0.530" (13.46mm). They mount identically on PCBs with standard through-hole crystal footprints.

Q: Which part should I select for new designs?

A: The ECS-73-20-1X should be selected for new designs. It carries Active product status and ROHS3 compliance, ensuring long-term availability and regulatory compliance.

Q: Are the frequency specifications identical?

A: Yes. Both parts operate at 7.3728 MHz with ±50ppm frequency stability and ±30ppm frequency tolerance. Operating temperature range is -10°C ~ 70°C for both parts.