RN732ATTD3972B10 Equivalent & Substitute Parts

Part Overview

The RN732ATTD3972B10 is a 39.7 kOhms ±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 features moisture-resistant construction and operates across -55°C to 155°C temperature range.

The RN732ATTD3972B10 carries an Obsolete product status. Locating equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or repair requirements for systems utilizing this resistor specification.

Substiute Parts

RN732ATTD3972B10

KOA Speer Electronics, Inc.In Stock: 985RN732ATTD3972B10 Datasheet

Current PartRFQ

RN73R2ATTD3972B10

KOA Speer Electronics, Inc.In Stock: 790RN73R2ATTD3972B10 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RN732ATTD3972B10 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Resistance Value: 39.7 kOhms
• Tolerance: ±0.1%
• Package / Case: 0805 (2012 Metric)
• Composition: Thin Film
• Temperature Coefficient: ±10ppm/°C
• Operating Temperature Range: -55°C ~ 155°C
• Number of Terminations: 2
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Allowable Variation Parameters:

• Power Rating: Substitute parts may have equal or higher power rating (0.1W or greater)
• Features: Substitute parts may include additional certifications or enhanced features (such as Automotive AEC-Q200)
• Product Status: Active status preferred over Obsolete

The RN73R2ATTD3972B10 qualifies as a direct substitute based on matching all mandatory parameters while offering increased power rating (0.125W vs 0.1W) and automotive-grade certification.

Parameter Comparison

Engineering Selection Recommendations

The RN73R2ATTD3972B10 serves as the direct substitute for the obsolete RN732ATTD3972B10. Selection of this substitute is supported by the following engineering factors:

Product Status Advantage: The RN73R2ATTD3972B10 maintains Active product status, ensuring continued availability and manufacturer support compared to the Obsolete RN732ATTD3972B10.

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

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

Compliance Alignment: Both parts achieve ROHS3 compliance and MSL Level 1 rating. The substitute includes Automotive AEC-Q200 certification, providing enhanced reliability qualification for applications requiring automotive-grade components.

Composition and Features: Thin film construction and moisture-resistant properties are preserved in the substitute, maintaining the original design intent for precision and environmental protection.

Frequently Asked Questions (FAQ)

Q: Can the RN73R2ATTD3972B10 be used as a direct replacement for RN732ATTD3972B10 in existing designs?

A: Yes. The RN73R2ATTD3972B10 is electrically and mechanically compatible. Identical resistance, tolerance, temperature coefficient, and package specifications ensure functional equivalence. The higher power rating (0.125W vs 0.1W) does not create compatibility issues.

Q: What is the significance of the power rating difference between the two parts?

A: The RN73R2ATTD3972B10 has a 0.125W rating compared to the RN732ATTD3972B10's 0.1W rating. This represents a 25% increase in power dissipation capability. In applications where the original 0.1W part operated within its thermal limits, the substitute provides additional thermal margin. No circuit redesign is required.

Q: Does the Automotive AEC-Q200 certification on the substitute part affect compatibility?

A: No. AEC-Q200 certification indicates enhanced reliability qualification and is not a limiting factor. The substitute meets or exceeds the original part's specifications. Applications not requiring automotive qualification are unaffected by this additional certification.

Q: Are the physical dimensions identical between the main part and substitute?

A: Yes. Both parts 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). PCB footprints are identical.

Q: What is the availability status difference between these parts?

A: The RN732ATTD3972B10 is Obsolete, indicating discontinued production. The RN73R2ATTD3972B10 is Active, ensuring ongoing availability from KOA Speer Electronics, Inc. and authorized distributors.

Q: Are RoHS and REACH compliance identical?

A: Yes. Both parts are ROHS3 Compliant and REACH Unaffected, meeting equivalent environmental and regulatory requirements.