ECS-115.2-S-4 11.52 MHz Crystal Equivalent & Substitute Parts

Part Overview

The ECS-115.2-S-4 is a 11.52 MHz through-hole crystal oscillator in HC-49/US package, designed for fundamental mode operation with 60 Ohms equivalent series resistance. This part carries a "Not For New Designs" status, making identification of active equivalent alternatives essential for ongoing production and new circuit implementations. The part operates across -10°C to 70°C with ±30ppm frequency tolerance and ±50ppm stability specification.

Substiute Parts

ECS-115.2-S-4

ECS Inc.In Stock: 960ECS-115.2-S-4 Datasheet

Current PartRFQ

ECS-115.2-S-4X

ECS Inc.In Stock: 2088ECS-115.2-S-4X Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ECS-115.2-S-4 is determined by strict equivalence across the following critical parameters:

• Frequency: 11.52 MHz (exact match required)
• Frequency Tolerance: ±30ppm (exact match required)
• ESR: 60 Ohms (exact match required)
• Package / Case: HC-49/US (exact match required)
• Mounting Type: Through Hole (exact match required)
• Operating Temperature Range: -10°C ~ 70°C (exact match required)
• Operating Mode: Fundamental (exact match required)

The ECS-115.2-S-4X meets all substitution criteria as a parametric equivalent with identical electrical and mechanical specifications. The primary distinction is product lifecycle status: the original part is obsolete for new designs, while the substitute is actively manufactured.

Parameter Comparison

Engineering Selection Recommendations

The ECS-115.2-S-4X is the direct active substitute for the ECS-115.2-S-4. Both parts are electrically and mechanically identical across all functional parameters. Selection between them is determined by regulatory and lifecycle requirements:

For new circuit designs and production runs, the ECS-115.2-S-4X is the appropriate choice due to its active product status and ROHS3 compliance. The original ECS-115.2-S-4 is suitable only for legacy system maintenance where existing inventory is available and RoHS non-compliance is acceptable within the application context.

Both parts share identical MSL rating (1 - Unlimited), REACH status (REACH Unaffected), and export classification (EAR99), ensuring equivalent handling and regulatory treatment in supply chain operations.

Frequently Asked Questions (FAQ)

Q: Can the ECS-115.2-S-4X be used as a direct replacement for the ECS-115.2-S-4 in existing circuits?

A: Yes. The ECS-115.2-S-4X is a parametric equivalent with identical frequency, tolerance, ESR, package, and operating specifications. No circuit modifications are required for substitution.

Q: What is the primary difference between these two parts?

A: The ECS-115.2-S-4X is the active production variant with ROHS3 compliance, while the ECS-115.2-S-4 is designated "Not For New Designs" and is RoHS non-compliant. Electrical and mechanical performance are identical.

Q: Are the physical dimensions identical?

A: Yes. 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 of 0.138" (4.60mm).

Q: Do these parts have different moisture sensitivity requirements?

A: No. Both parts carry MSL rating 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

Q: Which part should be specified for new designs?

A: The ECS-115.2-S-4X should be specified for all new designs. The ECS-115.2-S-4 is obsolete for new applications.