ECS-39-17-1 Equivalent & Substitute Parts

Part Overview

The ECS-39-17-1 is a 3.93216 MHz through-hole crystal oscillator in HC-49/U package with 17pF load capacitance and 100 Ohms ESR. This component is classified as Not For New Designs, indicating it has been superseded in the manufacturer's product line.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 legacy system maintenance, repair operations, and continued support of existing designs that cannot be migrated to newer crystal specifications.

Substiute Parts

ECS-39-17-1

ECS Inc.In Stock: 4133ECS-39-17-1 Datasheet

Current PartRFQ

ECS-39-17-1X

ECS Inc.In Stock: 2362ECS-39-17-1X Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ECS-39-17-1 is determined by strict equivalence across the following critical parameters:

• Frequency: 3.93216 MHz (exact match required)
• Frequency Tolerance: ±30ppm (exact match required)
• Load Capacitance: 17pF (exact match required)
• ESR: 100 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 (exact match required)
• Operating Mode: Fundamental (exact match required)

The ECS-39-17-1X meets all substitution criteria as a parametric equivalent. Differences in product status and compliance certifications do not affect electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The ECS-39-17-1X is the direct substitute for the ECS-39-17-1. All electrical and mechanical parameters are identical, ensuring pin-for-pin and functional compatibility in existing circuit designs.

The ECS-39-17-1X offers the additional advantage of Active product status, indicating ongoing manufacturer support and availability. The part also meets ROHS3 compliance requirements, whereas the original ECS-39-17-1 is RoHS non-compliant. Both parts share identical REACH and ECCN classifications.

Selection between these parts should be based on availability and compliance requirements of the target application. The ECS-39-17-1X is the preferred choice for new procurement due to its active status and improved regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the ECS-39-17-1X be used as a direct replacement for the ECS-39-17-1?

A: Yes. The ECS-39-17-1X is a parametric equivalent with identical electrical specifications (frequency, tolerance, load capacitance, ESR) and mechanical package (HC-49/U through-hole). Direct substitution is supported without circuit modification.

Q: What is the difference between the HC-49U and HC-49UX series designations?

A: Both designations refer to the same HC-49/U physical package format. The series designation reflects manufacturer product line evolution. The UX variant (ECS-39-17-1X) represents the current production series.

Q: Does the RoHS compliance difference affect compatibility?

A: No. RoHS compliance is a regulatory and manufacturing process attribute, not an electrical or mechanical specification. Both parts are functionally equivalent in circuit operation. RoHS3 compliance of the ECS-39-17-1X may be required for applications subject to EU or equivalent regulatory frameworks.

Q: Are there inventory considerations when selecting between these parts?

A: The ECS-39-17-1 has 4067 pieces in stock (legacy inventory). The ECS-39-17-1X has 2279 pieces in stock (active production). For long-term projects, the ECS-39-17-1X is recommended due to its Active product status and ongoing availability.

Q: Can these parts be used interchangeably in the same PCB assembly?

A: Yes. Both parts use identical through-hole mounting and HC-49/U package dimensions (0.447" L x 0.183" W, 0.530" max height). PCB footprints and assembly processes require no modification.