RN732ATTD39R0B25 Equivalent & Substitute Parts

Part Overview

The RN732ATTD39R0B25 is a 39 Ohm ±0.1% thin film chip resistor manufactured by KOA Speer Electronics, Inc. in 0805 (2012 Metric) package format with 0.1W power rating. This component is classified as obsolete product status, necessitating identification of active equivalent alternatives for ongoing design requirements and procurement continuity.

Substiute Parts

RN732ATTD39R0B25

KOA Speer Electronics, Inc.In Stock: 932RN732ATTD39R0B25 Datasheet

Current PartRFQ

RN73R2ATTD39R0B25

KOA Speer Electronics, Inc.In Stock: 868RN73R2ATTD39R0B25 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RN732ATTD39R0B25 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 39 Ohms
• Tolerance: ±0.1%
• Package / Case: 0805 (2012 Metric)
• Composition: Thin Film
• Temperature Coefficient: ±25ppm/°C
• Operating Temperature Range: -55°C ~ 155°C
• Moisture Resistant feature

Allowable Variation:

• Power rating may increase from 0.1W to higher ratings (0.125W or greater) without affecting circuit compatibility, as higher power-rated components maintain identical electrical characteristics while providing enhanced thermal margin

The RN73R2ATTD39R0B25 qualifies as a direct substitute based on matching all mandatory parameters while providing increased power rating (0.125W vs. 0.1W) and active product status.

Parameter Comparison

Engineering Selection Recommendations

The RN73R2ATTD39R0B25 is the qualified substitute for the obsolete RN732ATTD39R0B25. Selection rationale is based on the following factors:

Product Status: The substitute part maintains active product status, ensuring long-term availability and supply chain continuity compared to the obsolete main part.

Electrical Equivalence: Both components share identical resistance (39 Ohms), tolerance (±0.1%), temperature coefficient (±25ppm/°C), and operating temperature range (-55°C ~ 155°C). These parameters ensure functional equivalence in circuit applications.

Power Rating: The substitute provides 0.125W power rating versus the main part's 0.1W rating. This increase does not compromise compatibility and provides additional thermal headroom in applications where the main part was previously specified.

Compliance & Certifications: Both parts maintain ROHS3 compliance, REACH unaffected status, and MSL 1 rating. The substitute additionally carries AEC-Q200 automotive qualification, which does not restrict use in non-automotive applications.

Package Compatibility: Identical 0805 (2012 Metric) package dimensions and footprint ensure direct PCB layout compatibility without design modification.

Frequently Asked Questions (FAQ)

Q: Can RN73R2ATTD39R0B25 be used as a direct replacement for RN732ATTD39R0B25?

A: Yes. Both components share identical electrical specifications (39 Ohms ±0.1%, ±25ppm/°C, -55°C ~ 155°C operating range) and package format (0805). The substitute's higher power rating (0.125W vs. 0.1W) does not affect compatibility.

Q: What is the difference in power rating between these parts?

A: The main part is rated at 0.1W (1/10W), while the substitute is rated at 0.125W (1/8W). The substitute's increased power rating provides additional thermal margin without changing electrical performance or physical dimensions.

Q: Are the physical dimensions identical?

A: Yes. Both components use the 0805 (2012 Metric) package with identical dimensions: 0.079" L x 0.049" W (2.00mm x 1.25mm) and maximum seated height of 0.024" (0.60mm).

Q: Does the AEC-Q200 rating on the substitute affect non-automotive applications?

A: No. AEC-Q200 certification indicates automotive-grade reliability and does not restrict use in general industrial or consumer applications. It represents an additional qualification level.

Q: Are both parts RoHS compliant?

A: Yes. Both RN732ATTD39R0B25 and RN73R2ATTD39R0B25 are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity level) and REACH unaffected status.

Q: What packaging options are available for the substitute?

A: The RN73R2ATTD39R0B25 is supplied in Tape & Reel (TR) packaging format.