ECS-180-20-4 Crystal Equivalent & Substitute Parts

Part Overview

The ECS-180-20-4 is an 18 MHz through-hole crystal oscillator in HC-49/US package designed for fundamental mode operation. This part is currently active in production and widely used in timing applications requiring precise frequency control. Substitute parts may be required due to inventory constraints, supply chain considerations, or specific compliance requirements such as RoHS certification status.

Substiute Parts

ECS-180-20-4

ECS Inc.In Stock: 665ECS-180-20-4 Datasheet

Current PartRFQ

ECS-180-20-4X

ECS Inc.In Stock: 1229ECS-180-20-4X Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The ECS-180-20-4X qualifies as a parametric equivalent substitute based on the following critical parameters:

• Frequency: 18 MHz (identical)
• Frequency Tolerance: ±30ppm (identical)
• Load Capacitance: 20pF (identical)
• ESR: 40 Ohms (identical)
• Operating Mode: Fundamental (identical)
• Package / Case: HC-49/US (identical)
• Mounting Type: Through Hole (identical)
• Operating Temperature Range: -10°C ~ 70°C (identical)

All electrical and mechanical parameters match the original part specification, confirming direct substitution capability.

Parameter Comparison

Engineering Selection Recommendations

Both ECS-180-20-4 and ECS-180-20-4X are active production parts with identical electrical and mechanical specifications. The primary distinction is RoHS compliance status: ECS-180-20-4X is ROHS3 compliant, while ECS-180-20-4 is RoHS non-compliant. Selection between these parts depends on regulatory requirements for the end application. Both parts maintain REACH Unaffected status and identical MSL ratings. Inventory availability may also influence part selection, with ECS-180-20-4X currently showing higher stock levels (1142 Pcs vs. 649 Pcs).

Frequently Asked Questions (FAQ)

Q: Can ECS-180-20-4X replace ECS-180-20-4 in existing designs?

A: Yes. All electrical parameters (frequency, tolerance, load capacitance, ESR, operating mode, and temperature range) and mechanical specifications (package, mounting type, dimensions) are identical. Direct substitution is possible without circuit modification.

Q: What is the difference between these two parts?

A: The primary difference is RoHS compliance certification. ECS-180-20-4X is ROHS3 compliant, while ECS-180-20-4 is RoHS non-compliant. All other specifications are identical.

Q: Does RoHS compliance affect circuit performance?

A: No. RoHS compliance relates to material composition and environmental regulations, not electrical performance. Both parts deliver identical frequency, tolerance, and operating characteristics.

Q: Are the physical dimensions identical?

A: Yes. Both parts use HC-49/US package with identical dimensions: 0.447" L x 0.183" W (11.35mm x 4.65mm) and maximum seated height of 0.138" (4.60mm).

Q: Which part should I select for new designs?

A: Selection depends on regulatory requirements. For applications requiring RoHS compliance, use ECS-180-20-4X. For applications without RoHS requirements, either part is suitable based on availability and cost considerations.