EFO-S4004E5 Equivalent & Substitute Parts

Part Overview

The EFO-S4004E5 is a 4 MHz ceramic resonator with built-in 33 pF capacitor manufactured by Panasonic Electronic Components. This surface mount component is designed for frequency control and timing applications requiring stable oscillation at 4 MHz with ±0.2% frequency stability across the -20°C to 80°C operating temperature range.

The EFO-S4004E5 has reached obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this ceramic resonator.

Substiute Parts

EFO-S4004E5

Panasonic Electronic ComponentsIn Stock: 795EFO-S4004E5 Datasheet

Current PartRFQ

ECS-SR1-4.00-B-TR

ECS Inc.In Stock: 24660ECS-SR1-4.00-B-TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the EFO-S4004E5 is determined by the following critical parameters:

• Frequency Match: 4 MHz (exact match required)
• Frequency Stability: ±0.2% or better (primary specification)
• Built-in Capacitance: 33 pF nominal (determines circuit resonance)
• Operating Temperature Range: -20°C to 80°C minimum (application requirement)
• Mounting Type: Surface Mount (PCB assembly compatibility)
• Package / Case: 3-SMD, Non-Standard (footprint compatibility)

The ECS-SR1-4.00-B-TR qualifies as a substitute based on matching frequency (4 MHz), compatible operating temperature range (-20°C to 80°C), identical mounting type (Surface Mount), and equivalent package classification (3-SMD, Non-Standard). Minor variations in frequency stability (±0.3% vs. ±0.2%), built-in capacitance (30 pF vs. 33 pF), and physical dimensions fall within acceptable tolerance ranges for ceramic resonator substitution in standard timing applications.

Parameter Comparison

Engineering Selection Recommendations

The ECS-SR1-4.00-B-TR is available as a substitute for the obsolete EFO-S4004E5. Selection should be based on the following factors:

Product Status Consideration: The ECS-SR1-4.00-B-TR carries Last Time Buy status, indicating limited future availability. Long-term supply planning should account for this status change.

Compliance & Certifications: The ECS-SR1-4.00-B-TR is RoHS3 Compliant and REACH Unaffected, meeting current regulatory requirements. Both parts share identical ECCN (EAR99) and HTSUS (8548.00.0000) classifications.

Physical Compatibility: Dimensional variations exist between the main part and substitute. The ECS-SR1-4.00-B-TR is slightly smaller in length (7.50mm vs. 7.80mm) and width (3.30mm vs. 3.20mm) but taller (2.20mm vs. 1.60mm). PCB layout verification is required to confirm footprint compatibility.

Electrical Performance: The substitute maintains identical frequency (4 MHz) and operating temperature range (-20°C to 80°C). The frequency stability specification is relaxed (±0.3% vs. ±0.2%), and built-in capacitance differs (30 pF vs. 33 pF). Circuit design validation is necessary to confirm acceptable performance with these parameter variations.

Frequently Asked Questions (FAQ)

Q: Can the ECS-SR1-4.00-B-TR directly replace the EFO-S4004E5 without circuit modification?

A: Direct replacement requires verification of two factors: PCB footprint compatibility (dimensional differences exist) and circuit tolerance to the 30 pF capacitance value versus the original 33 pF specification. Electrical simulation or prototype testing is recommended before production implementation.

Q: What is the significance of the frequency stability difference (±0.2% vs. ±0.3%)?

A: Frequency stability defines the maximum frequency deviation across the operating temperature range. The substitute's ±0.3% specification is less stringent than the original ±0.2%. Applications with tight frequency tolerance requirements must evaluate whether this relaxation affects system performance.

Q: Why does the substitute have different built-in capacitance (30 pF vs. 33 pF)?

A: Built-in capacitance values are selected during ceramic resonator design to achieve the specified frequency at nominal conditions. The 30 pF value in the substitute is a standard offering from ECS Inc. for 4 MHz resonators. Circuit design must accommodate this capacitance value.

Q: Are there physical mounting concerns with the height difference (1.60mm vs. 2.20mm)?

A: The substitute is 0.60mm taller. PCB clearance verification is necessary to confirm no interference with adjacent components, solder reflow profiles, or assembly equipment.

Q: What does Last Time Buy status mean for the ECS-SR1-4.00-B-TR?

A: Last Time Buy indicates the manufacturer will discontinue production after a specified date. Customers requiring this part should place final orders before the cutoff date. Long-term designs should identify alternative solutions or secure inventory accordingly.

Q: Are both parts moisture sensitive?

A: Both parts carry MSL 1 (Unlimited) classification, indicating no moisture sensitivity restrictions. Standard handling and storage practices apply.