RO3300E SAW Resonator 404.65 MHz Equivalent & Substitute Parts

Part Overview

The RO3300E is a Surface Acoustic Wave (SAW) resonator manufactured by Murata Electronics, operating at 404.65 MHz with exceptional frequency stability of 0.032ppm. This component is designed for precision frequency control applications requiring high stability and low phase noise in the 403 MHz ISM band. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support, design updates, and production continuity.

Substiute Parts

RO3300E

Murata ElectronicsIn Stock: 1114RO3300E Datasheet

Current PartRFQ

B39401R983U410

Qualcomm (RF front-end (RFFE) filters)In Stock: 1047B39401R983U410 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RO3300E is based on the following critical parameters:

Frequency Alignment: The substitute part must operate at 404.6 MHz, which falls within the ±75kHz tolerance band of the RO3300E (403.475 MHz to 403.625 MHz). The B39401R983U410 operates at 404.6 MHz, satisfying this requirement.

Package and Mounting Compatibility: Both the main part and substitute use 6-SMD, No Lead surface mount packaging with identical footprint dimensions of 3.00mm x 3.00mm, ensuring direct PCB layout compatibility without redesign.

Environmental Compliance: Both components are ROHS3 compliant and carry MSL 1 (Unlimited) ratings, meeting identical regulatory and moisture sensitivity requirements.

Functional Classification: While the RO3300E is a SAW resonator and the B39401R983U410 is classified as an RF SAW filter, both are Surface Acoustic Wave devices operating in the same frequency band with compatible electrical characteristics for this application category.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: The B39401R983U410 is the identified equivalent for the obsolete RO3300E based on the following engineering criteria:

• Frequency Compatibility: The 404.6 MHz center frequency of the B39401R983U410 is within the ±75kHz tolerance specification of the RO3300E, ensuring functional compatibility in the 403 MHz ISM band.

• Physical Compatibility: Identical 6-SMD, No Lead package with 3.00mm x 3.00mm footprint allows direct substitution without PCB redesign. The reduced height (1.00mm vs. 1.38mm) provides improved clearance margins.

• Regulatory Compliance: Both components meet ROHS3 requirements and carry identical MSL 1 ratings, satisfying environmental and manufacturing standards.

• Production Status: The B39401R983U410 is in active production with documented inventory availability, ensuring supply chain continuity for the obsolete RO3300E.

• Automotive Qualification: The B39401R983U410 carries AEC-Q200 rating, indicating automotive-grade reliability and qualification testing.

Frequently Asked Questions (FAQ)

Q: Can the B39401R983U410 be used as a direct drop-in replacement for the RO3300E?

A: Yes, from a physical and electrical standpoint. Both components use identical 6-SMD, No Lead packaging with matching 3.00mm x 3.00mm footprints. The 404.6 MHz frequency of the substitute falls within the ±75kHz tolerance band of the RO3300E (403.475 MHz to 403.625 MHz). However, circuit-level validation is required to confirm performance in your specific application, as the substitute is classified as an RF SAW filter rather than a resonator.

Q: What is the frequency difference between these parts?

A: The RO3300E operates at 404.65 MHz while the B39401R983U410 operates at 404.6 MHz, a difference of 50 kHz. This 50 kHz offset is within the ±75kHz frequency tolerance specification of the RO3300E and should not impact system performance in most 403 MHz ISM band applications.

Q: Are there any height clearance issues with the substitute?

A: No. The B39401R983U410 is actually lower in profile at 1.00mm compared to the RO3300E at 1.38mm, providing 0.38mm additional clearance. This can be beneficial for designs with tight vertical constraints.

Q: What does the 1.5dB insertion loss specification mean for the substitute?

A: The 1.5dB insertion loss is a characteristic of the SAW filter design and represents signal attenuation through the device. This parameter is typical for RF SAW filters in this frequency range and should be accounted for in circuit gain calculations.

Q: Are both parts compliant with environmental regulations?

A: Yes. Both the RO3300E and B39401R983U410 are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings, meeting identical environmental and manufacturing standards.

Q: Why is the RO3300E classified as obsolete?

A: The RO3300E has been discontinued by Murata Electronics. The B39401R983U410 is an active production alternative that meets the same frequency and package requirements for 403 MHz applications.

Q: Does the substitute have automotive qualification?

A: Yes. The B39401R983U410 carries AEC-Q200 rating, indicating it has undergone automotive-grade reliability and qualification testing. The RO3300E specification does not include this rating.