ECS-250-18-9 Crystal Equivalent & Substitute Parts

Part Overview

The ECS-250-18-9 is a 25 MHz through-hole crystal oscillator with 18pF load capacitance, designed for fundamental mode operation in standard cylindrical can packages. This component is classified as Active product status. Substitute parts are identified when inventory constraints, compliance requirements, or supply chain considerations necessitate alternative sourcing while maintaining electrical and mechanical compatibility.

Substiute Parts

ECS-250-18-9

ECS Inc.In Stock: 1026ECS-250-18-9 Datasheet

Current PartRFQ

ECS-250-18-9X

ECS Inc.In Stock: 2406ECS-250-18-9X Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ECS-250-18-9 is determined by strict equivalence across the following critical parameters:

• Frequency: 25 MHz (exact match required)
• Frequency Stability: ±50ppm (exact match required)
• Load Capacitance: 18pF (exact match required)
• ESR: 50 Ohms (exact match required)
• Operating Mode: Fundamental (exact match required)
• Operating Temperature Range: -10°C ~ 60°C (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: Cylindrical Can, Radial (exact match required)
• Physical Dimensions: 0.126" Dia x 0.354" L (exact match required)

The substitute part ECS-250-18-9X meets all electrical and mechanical parameters specified above, establishing it as a parametric equivalent.

Parameter Comparison

Engineering Selection Recommendations

Both ECS-250-18-9 and ECS-250-18-9X are Active status products with identical electrical and mechanical specifications. The primary distinction is RoHS compliance status: ECS-250-18-9 is RoHS non-compliant, while ECS-250-18-9X is ROHS3 compliant. Selection between these parts should be based on regulatory requirements applicable to the end application. The ECS-250-18-9X offers superior compliance posture for applications subject to RoHS3 regulations. Current inventory levels show ECS-250-18-9X at 2318 pieces versus ECS-250-18-9 at 938 pieces.

Frequently Asked Questions (FAQ)

Q: Can ECS-250-18-9X be used as a direct replacement for ECS-250-18-9?

A: Yes. Both parts are parametrically equivalent across all electrical and mechanical specifications including frequency, load capacitance, ESR, operating temperature range, and physical dimensions. Direct substitution is supported at the circuit level.

Q: What is the difference between these two part numbers?

A: The primary difference is RoHS compliance certification. ECS-250-18-9X meets ROHS3 standards, while ECS-250-18-9 does not. All other specifications are identical.

Q: Are the physical dimensions identical?

A: Yes. Both parts use the same cylindrical can, radial package with dimensions of 0.126" diameter by 0.354" length (3.20mm x 9.00mm). PCB footprint and mounting hole requirements are identical.

Q: Do these parts have the same operating temperature range?

A: Yes. Both parts operate across the identical temperature range of -10°C to 60°C with the same frequency stability of ±50ppm.

Q: Which part should I select for new designs?

A: Selection depends on regulatory requirements. For applications requiring RoHS3 compliance, specify ECS-250-18-9X. For applications without RoHS compliance mandates, either part meets the electrical requirements. Verify compliance obligations for your specific end application and region.