ECS-50-20-4 Equivalent & Substitute Parts

Part Overview

The ECS-50-20-4 is a 5 MHz through-hole crystal oscillator in HC-49/US package with 20pF load capacitance and 120 Ohms equivalent series resistance. This part is classified as Not For New Designs, making identification of active equivalent alternatives essential for ongoing production and maintenance applications. Substitute parts must maintain identical electrical and mechanical specifications to ensure direct compatibility in existing circuit designs.

Substiute Parts

ECS-50-20-4

ECS Inc.In Stock: 1751ECS-50-20-4 Datasheet

Current PartRFQ

ECS-50-20-4X

ECS Inc.In Stock: 1930ECS-50-20-4X Datasheet

Parametric EquivalentRFQ

251-05000

Parallax Inc.In Stock: 716251-05000 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ECS-50-20-4 is determined by strict equivalence across the following parameters: frequency (5 MHz), frequency tolerance (±30ppm), load capacitance (20pF), ESR (120 Ohms), operating mode (Fundamental), package type (HC-49/US), mounting configuration (Through Hole), and operating temperature range (-10°C ~ 70°C). All identified substitute parts match these specifications exactly, ensuring electrical and mechanical interchangeability without circuit modification.

Parameter Comparison

Engineering Selection Recommendations

For applications requiring active product status and regulatory compliance, ECS-50-20-4X is the primary substitute. This part is manufactured by ECS Inc., maintains all electrical and mechanical specifications of the original ECS-50-20-4, and carries Active product status with ROHS3 compliance.

The 251-05000 from Parallax Inc. provides an alternative substitute with identical electrical and mechanical parameters. This part maintains Active product status and meets REACH requirements, though it carries RoHS non-compliant status matching the original part.

Both substitute parts are direct electrical and mechanical equivalents suitable for applications currently using the ECS-50-20-4 5 MHz crystal oscillator.

Frequently Asked Questions (FAQ)

Q: Can ECS-50-20-4X be used as a direct replacement for ECS-50-20-4?

A: Yes. The ECS-50-20-4X matches all critical electrical parameters (5 MHz frequency, ±30ppm tolerance, 20pF load capacitance, 120 Ohms ESR) and mechanical specifications (HC-49/US package, through-hole mounting, identical dimensions). The parts are electrically and mechanically interchangeable.

Q: What is the difference between ECS-50-20-4 and ECS-50-20-4X?

A: The primary differences are product status and RoHS compliance. ECS-50-20-4 is Not For New Designs and RoHS non-compliant, while ECS-50-20-4X is Active and ROHS3 Compliant. All electrical and mechanical specifications are identical.

Q: Is 251-05000 compatible with circuits designed for ECS-50-20-4?

A: Yes. The 251-05000 provides identical electrical performance (5 MHz, ±30ppm tolerance, 20pF load capacitance, 120 Ohms ESR) and mechanical compatibility (HC-49/US package, through-hole mounting, same physical dimensions). It is a direct substitute.

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

A: No. All three parts use HC-49/US package with through-hole mounting. Physical dimensions and height specifications are identical: 0.447" L x 0.183" W (11.35mm x 4.65mm) with maximum seated height of 0.138" (4.60mm).

Q: Which substitute should be selected for new production?

A: ECS-50-20-4X is recommended for new production due to Active product status and ROHS3 compliance. Both ECS-50-20-4X and 251-05000 maintain Active status, providing long-term availability assurance.