ECS-100-18-4 Equivalent & Substitute Parts

Part Overview

The ECS-100-18-4 is a 10 MHz through-hole crystal oscillator in HC-49/US package with 18pF load capacitance and 60 Ohms equivalent series resistance. This part carries a "Not For New Designs" status, making substitute parts necessary for ongoing production and new circuit implementations. The part is RoHS non-compliant and operates across a -10°C to 70°C temperature range.

Substiute Parts

ECS-100-18-4

ECS Inc.In Stock: 2381ECS-100-18-4 Datasheet

Current PartRFQ

ECS-100-18-4-DN

ECS Inc.In Stock: 871ECS-100-18-4-DN Datasheet

SimilarRFQ

ECS-100-20-4VX

ECS Inc.In Stock: 1170ECS-100-20-4VX Datasheet

SimilarRFQ

ECS-100-18-4X

ECS Inc.In Stock: 5626ECS-100-18-4X Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the ECS-100-18-4 is determined by strict alignment of electrical and mechanical parameters. The critical parameters for substitution are: frequency (10 MHz), load capacitance (18pF), ESR (60 Ohms), frequency tolerance (±30ppm), package type (HC-49/US), and mounting configuration (through hole).

Substitute parts are grouped into two categories:

Direct Electrical Equivalents: Parts matching all critical electrical parameters (frequency, load capacitance, ESR, frequency tolerance) and mechanical form factor.

Parametric Variants: Parts with identical frequency and package but differing in secondary parameters such as load capacitance or frequency stability, suitable only where circuit design permits tolerance of these variations.

Parameter Comparison

Engineering Selection Recommendations

ECS-100-18-4-DN: Direct electrical equivalent with identical load capacitance (18pF) and ESR (60 Ohms). Carries Active product status. Frequency stability is ±100ppm compared to ±50ppm of the original part. Operating temperature range extends to -40°C ~ 85°C. RoHS non-compliant status matches the original part. Select this substitute where extended temperature operation is required and the wider frequency stability tolerance is acceptable.

ECS-100-18-4X: Parametric equivalent with identical electrical specifications (18pF load capacitance, ±30ppm tolerance, ±50ppm stability, 60 Ohms ESR). Carries Active product status and ROHS3 compliance. Operating temperature range matches the original (-10°C ~ 70°C). Select this substitute for new designs requiring RoHS3 compliance without modification to circuit parameters.

ECS-100-20-4VX: Parametric variant with 20pF load capacitance versus 18pF of the original part. Frequency, ESR, and tolerance specifications remain identical. Carries Active product status and ROHS3 compliance. Physical dimensions differ slightly (height 0.083" vs. 0.138"). Select this substitute only where circuit design accommodates the 20pF load capacitance variation and RoHS3 compliance is required.

Frequently Asked Questions (FAQ)

Q: Can ECS-100-18-4-DN replace ECS-100-18-4 in all applications?

A: ECS-100-18-4-DN matches all critical electrical parameters (frequency, load capacitance, ESR, tolerance). The primary difference is frequency stability (±100ppm vs. ±50ppm) and extended operating temperature range (-40°C ~ 85°C vs. -10°C ~ 70°C). Substitution is valid where circuit design tolerates the wider frequency stability specification.

Q: What is the difference between ECS-100-18-4X and ECS-100-18-4?

A: ECS-100-18-4X is electrically identical to ECS-100-18-4 across all critical parameters. The key difference is product status (Active vs. Not For New Designs) and RoHS compliance (ROHS3 vs. non-compliant). ECS-100-18-4X is the recommended substitute for new designs.

Q: Can ECS-100-20-4VX be used as a direct replacement?

A: ECS-100-20-4VX differs in load capacitance (20pF vs. 18pF). This parameter affects circuit resonance and oscillation characteristics. Substitution requires circuit design verification to confirm that 20pF load capacitance is compatible with the oscillator circuit topology and does not degrade performance.

Q: Are all substitute parts in the same HC-49/US package?

A: All substitute parts use HC-49/US package with through-hole mounting. Physical dimensions vary slightly: ECS-100-20-4VX has a maximum seated height of 0.083" compared to 0.138" for other parts. Verify PCB layout clearance if space constraints exist.

Q: Which substitute part should be selected for RoHS3 compliance?

A: ECS-100-18-4X and ECS-100-20-4VX carry ROHS3 compliance. ECS-100-18-4X maintains identical electrical specifications to the original part and is the preferred choice for RoHS3 compliance without circuit modification.