ECS-36-S-4 Crystal Equivalent & Substitute Parts

Part Overview

The ECS-36-S-4 is a 3.6864 MHz through-hole crystal oscillator in HC-49/US package configuration, designed for fundamental mode operation across industrial temperature ranges. This component is classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product roadmap. Identifying equivalent substitute parts ensures design continuity for legacy systems and ongoing production support where this frequency and package type remain functionally necessary.

Substiute Parts

ECS-36-S-4

ECS Inc.In Stock: 1463ECS-36-S-4 Datasheet

Current PartRFQ

ECS-36-S-4X

ECS Inc.In Stock: 1747ECS-36-S-4X Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ECS-36-S-4 is determined by strict parametric matching across the following critical criteria:

• Frequency Match: 3.6864 MHz (exact)
• Frequency Tolerance: ±30ppm (exact)
• Frequency Stability: ±50ppm (exact)
• ESR: 200 Ohms (exact)
• Operating Mode: Fundamental (exact)
• Package / Case: HC-49/US (exact)
• Mounting Type: Through Hole (exact)
• Operating Temperature Range: -10°C ~ 70°C (exact)
• Load Capacitance Configuration: Series (exact)

The ECS-36-S-4X meets all parametric requirements for direct substitution. The primary distinction between the main part and its substitute lies in product lifecycle status and compliance certifications, not in electrical or mechanical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The ECS-36-S-4X is the direct parametric equivalent to the ECS-36-S-4. All electrical and mechanical specifications are identical, ensuring pin-for-pin and functional compatibility in existing circuit designs.

Product Status Consideration: The ECS-36-S-4 carries "Not For New Designs" status, while the ECS-36-S-4X is classified as Active. For ongoing production and new applications, the ECS-36-S-4X is the appropriate selection.

Compliance Consideration: The ECS-36-S-4X is ROHS3 compliant, whereas the ECS-36-S-4 is RoHS non-compliant. Both parts maintain REACH Unaffected and EAR99 ECCN classifications. For applications subject to RoHS regulatory requirements, the ECS-36-S-4X is mandatory.

Inventory Availability: The ECS-36-S-4X maintains higher current inventory (1638 Pcs) compared to the ECS-36-S-4 (1362 Pcs), supporting supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the ECS-36-S-4X be used as a direct replacement for the ECS-36-S-4 in existing designs?

A: Yes. All electrical parameters (frequency, tolerance, stability, ESR, operating mode) and mechanical specifications (package, dimensions, mounting type, temperature range) are identical. The ECS-36-S-4X is a direct substitute requiring no circuit modifications.

Q: What is the difference between the ECS-36-S-4 and ECS-36-S-4X?

A: The parts are electrically and mechanically identical. The primary differences are product lifecycle status (Active vs. Not For New Designs) and RoHS compliance (ROHS3 Compliant vs. non-compliant). The ECS-36-S-4X represents the current production equivalent.

Q: Are there any package or pinout differences between these parts?

A: No. Both parts use the HC-49/US package with identical dimensions (0.447" L x 0.183" W, 11.35mm x 4.65mm) and maximum seated height (0.138" / 4.60mm). Through-hole mounting configuration is identical.

Q: Which part should be selected for new designs?

A: The ECS-36-S-4X should be selected for new designs. The ECS-36-S-4 is designated "Not For New Designs" and represents a legacy product line.

Q: Does RoHS compliance affect circuit performance?

A: RoHS compliance relates to material composition and environmental regulations, not electrical performance. Both parts deliver identical frequency, tolerance, stability, and ESR characteristics. The ECS-36-S-4X's ROHS3 compliance is a regulatory advantage for applications subject to RoHS requirements.