B39421R2702U310 Equivalent & Substitute Parts

Part Overview

The B39421R2702U310 is a 418.05 MHz Surface Acoustic Wave (SAW) filter manufactured by Qualcomm, designed for general-purpose RF front-end applications. This component operates as an 8-SMD, no-lead surface mount device with 9.2 dB insertion loss and unlimited moisture sensitivity rating (MSL 1).

The B39421R2702U310 is classified as obsolete. Locating equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production requirements for systems utilizing this RF filtering component.

Substiute Parts

B39421R2702U310

Qualcomm (RF front-end (RFFE) filters)In Stock: 821B39421R2702U310 Datasheet

Current PartRFQ

ECS-SDR1-4180-TR

ECS Inc.In Stock: 2472ECS-SDR1-4180-TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the B39421R2702U310 is determined by the following critical parameters:

Frequency Compatibility: The substitute part must operate at or near 418 MHz. The B39421R2702U310 operates at 418.05 MHz center frequency. The ECS-SDR1-4180-TR operates at 418 MHz with ±75 kHz frequency tolerance, providing frequency alignment within acceptable RF filtering specifications.

Package Compatibility: Both the main part and substitute must use identical or functionally equivalent surface mount packaging. The B39421R2702U310 and ECS-SDR1-4180-TR both utilize 8-SMD, no-lead packages with matching footprint dimensions of 0.197" L x 0.197" W (5.00 mm x 5.00 mm).

Mounting Type: Surface mount technology is required for both components to ensure PCB assembly compatibility.

Regulatory Compliance: Both parts must maintain ROHS3 compliance and MSL 1 rating to satisfy environmental and moisture handling requirements.

Product Availability: The substitute part must have active product status and confirmed inventory to ensure supply chain viability.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: ECS-SDR1-4180-TR

The ECS-SDR1-4180-TR is the qualified substitute for the obsolete B39421R2702U310 based on the following engineering criteria:

Frequency Alignment: The ECS-SDR1-4180-TR operates at 418 MHz with ±75 kHz tolerance, providing 50 kHz offset from the B39421R2702U310 nominal frequency of 418.05 MHz. This frequency differential remains within typical RF filter application tolerances for 418 MHz ISM band and similar general-purpose RF filtering applications.

Package Equivalence: Both components share identical footprint dimensions (5.00 mm x 5.00 mm) and 8-SMD, no-lead surface mount packaging. The height differential of 0.006" (0.15 mm) between components does not impact PCB assembly compatibility or clearance requirements.

Regulatory Compliance: The ECS-SDR1-4180-TR maintains ROHS3 compliance and MSL 1 rating, satisfying all environmental and moisture sensitivity requirements of the original specification.

Supply Chain Status: The ECS-SDR1-4180-TR holds active product status with confirmed inventory availability (2421 Pcs), ensuring reliable procurement for production and replacement applications.

Frequently Asked Questions (FAQ)

Q: Can the ECS-SDR1-4180-TR directly replace the B39421R2702U310 in existing designs?

A: The ECS-SDR1-4180-TR is compatible for direct substitution in applications where the 418 MHz center frequency with ±75 kHz tolerance meets system requirements. Both components share identical 8-SMD, no-lead packaging and footprint dimensions. Verify that the 50 kHz frequency offset and unspecified insertion loss of the substitute part align with your RF filtering specifications before implementation.

Q: What is the significance of the height difference between these components?

A: The B39421R2702U310 has a maximum height of 0.053" (1.35 mm), while the ECS-SDR1-4180-TR measures 0.059" (1.50 mm). The 0.006" (0.15 mm) difference does not impact standard PCB assembly processes or component clearance in typical RF front-end layouts. Verify clearance in applications with height-constrained designs.

Q: Why is the B39421R2702U310 classified as obsolete?

A: Obsolete status indicates that Qualcomm has discontinued manufacturing and support for this component. The ECS-SDR1-4180-TR, with active product status, provides a viable alternative for ongoing production and maintenance applications.

Q: Are there compliance differences between the two parts?

A: Both components are ROHS3 compliant and carry MSL 1 (unlimited) moisture sensitivity ratings. Both are REACH unaffected and classified under ECCN EAR99. No compliance barriers exist for substitution.

Q: What parameters should be verified before substituting these parts?

A: Confirm that the 418 MHz center frequency with ±75 kHz tolerance meets your system's RF filtering requirements. Verify PCB layout accommodates the 0.15 mm height difference. Confirm that unspecified insertion loss characteristics of the ECS-SDR1-4180-TR are acceptable for your application's signal path requirements.