RN732ATTD3972F10 Equivalent & Substitute Parts

Part Overview

The RN732ATTD3972F10 is a 39.7 kOhms ±1% thin film chip resistor manufactured by KOA Speer Electronics, Inc. in 0805 (2012 Metric) package format with 0.1W power rating. This component features moisture-resistant construction and operates across the temperature range of -55°C to 155°C.

The RN732ATTD3972F10 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this resistance value and package specification.

Substiute Parts

RN732ATTD3972F10

KOA Speer Electronics, Inc.In Stock: 789RN732ATTD3972F10 Datasheet

Current PartRFQ

RN73R2ATTD3972F10

KOA Speer Electronics, Inc.In Stock: 807RN73R2ATTD3972F10 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RN732ATTD3972F10 is determined by strict equivalence in the following critical parameters:

Mandatory Matching Parameters:

• Resistance Value: 39.7 kOhms
• Tolerance: ±1%
• Package / Case: 0805 (2012 Metric)
• Composition: Thin Film
• Temperature Coefficient: ±10ppm/°C
• Operating Temperature Range: -55°C to 155°C
• Moisture Resistant Feature

Allowable Variation Parameters:

• Power Rating: May be equal or higher than 0.1W
• Product Status: Active status preferred over obsolete
• Certifications and Ratings: Additional certifications (such as AEC-Q200) do not disqualify substitution

The RN73R2ATTD3972F10 qualifies as a direct substitute based on matching all mandatory parameters while offering increased power rating (0.125W vs. 0.1W) and active product status with automotive qualification.

Parameter Comparison

Engineering Selection Recommendations

The RN73R2ATTD3972F10 is the direct substitute for the obsolete RN732ATTD3972F10. Selection of this substitute part is supported by the following engineering factors:

Product Status: The RN73R2ATTD3972F10 maintains active product status, ensuring continued availability and supply chain support compared to the obsolete main part.

Electrical Equivalence: Both parts maintain identical resistance value (39.7 kOhms), tolerance (±1%), temperature coefficient (±10ppm/°C), and operating temperature range (-55°C to 155°C). The increased power rating of the substitute (0.125W vs. 0.1W) provides additional thermal margin without affecting circuit performance.

Mechanical Compatibility: Identical package dimensions (0805 / 2012 Metric) and physical footprint ensure direct PCB compatibility without layout modifications.

Compliance: Both parts are ROHS3 compliant with MSL 1 rating. The substitute includes AEC-Q200 automotive qualification, which does not restrict use in non-automotive applications.

Composition and Features: Thin film construction and moisture-resistant characteristics are preserved in the substitute part, maintaining performance stability across the specified operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can the RN73R2ATTD3972F10 be used as a direct replacement for the RN732ATTD3972F10 on existing PCBs?

A: Yes. The RN73R2ATTD3972F10 is mechanically and electrically compatible. Both parts use identical 0805 (2012 Metric) package dimensions and footprint. No PCB layout modifications are required.

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

A: The main part (RN732ATTD3972F10) is rated at 0.1W (1/10W), while the substitute (RN73R2ATTD3972F10) is rated at 0.125W (1/8W). The higher power rating of the substitute provides additional thermal dissipation capability and does not negatively impact circuit operation.

Q: Are there any compliance or certification differences?

A: Both parts are ROHS3 compliant with MSL 1 rating. The substitute includes AEC-Q200 automotive qualification. This additional certification does not restrict the substitute's use in non-automotive applications.

Q: Why is the main part listed as obsolete?

A: The RN732ATTD3972F10 is classified as obsolete by the manufacturer. The RN73R2ATTD3972F10 represents the active product line continuation with equivalent electrical and mechanical specifications.

Q: Are the temperature coefficients identical?

A: Yes. Both parts maintain a temperature coefficient of ±10ppm/°C and operate across the identical temperature range of -55°C to 155°C.

Q: What packaging options are available for the substitute part?

A: The RN73R2ATTD3972F10 is supplied in Tape & Reel (TR) packaging format.