RN732ATTD3973F100 Equivalent & Substitute Parts

Part Overview

The RN732ATTD3973F100 is a 397 kOhms ±1% thin film chip resistor rated at 0.1W (1/10W) in 0805 (2012 Metric) package format. This component is manufactured by KOA Speer Electronics, Inc. and features moisture-resistant construction with a temperature coefficient of ±100ppm/°C and operating range of -55°C to 155°C.

The RN732ATTD3973F100 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 resistor specification.

Substiute Parts

RN732ATTD3973F100

KOA Speer Electronics, Inc.In Stock: 1138RN732ATTD3973F100 Datasheet

Current PartRFQ

RN73R2ATTD3973F100

KOA Speer Electronics, Inc.In Stock: 815RN73R2ATTD3973F100 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RN732ATTD3973F100 is based on strict equivalence of the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 397 kOhms
• Tolerance: ±1%
• Package / Case: 0805 (2012 Metric)
• Composition: Thin Film
• Temperature Coefficient: ±100ppm/°C
• Operating Temperature Range: -55°C to 155°C
• Moisture Resistant construction

Allowable Variation:

• Power rating may be equal to or greater than 0.1W, provided the physical dimensions remain compatible with the 0805 package footprint

The RN73R2ATTD3973F100 qualifies as a direct substitute because it maintains all mandatory parameters while offering an increased power rating of 0.125W (1/8W). This higher power rating does not compromise compatibility and provides additional thermal margin in the same physical package.

Parameter Comparison

Engineering Selection Recommendations

The RN73R2ATTD3973F100 is the direct substitute for the obsolete RN732ATTD3973F100. Selection of this substitute is based on the following engineering factors:

Product Status: The RN73R2ATTD3973F100 maintains active product status, ensuring continued availability and supply chain support compared to the obsolete main part.

Compliance & Certifications: Both parts are ROHS3 compliant and REACH unaffected. The substitute part carries AEC-Q200 automotive qualification, which provides additional reliability assurance for applications requiring automotive-grade components.

Electrical & Mechanical Compatibility: The substitute maintains identical resistance, tolerance, temperature coefficient, and operating temperature range. The increased power rating (0.125W versus 0.1W) in the same physical footprint provides enhanced thermal performance without requiring PCB layout modifications.

Physical Compatibility: Identical 0805 package dimensions, height, and termination count ensure direct PCB footprint compatibility without design revision.

Frequently Asked Questions (FAQ)

Q: Can the RN73R2ATTD3973F100 be used as a direct replacement for the RN732ATTD3973F100?

A: Yes. The RN73R2ATTD3973F100 is a direct substitute. Both parts share identical resistance value (397 kOhms), tolerance (±1%), package format (0805), composition (thin film), temperature coefficient (±100ppm/°C), and operating temperature range (-55°C to 155°C). The substitute offers a higher power rating (0.125W versus 0.1W) in the same physical package, providing improved thermal margin.

Q: Are there any PCB layout changes required when substituting the RN73R2ATTD3973F100?

A: No. Both parts use the identical 0805 (2012 Metric) package with matching dimensions (0.079" L x 0.049" W, 2.00mm x 1.25mm) and height (0.024" maximum). No PCB footprint or layout modifications are necessary.

Q: What is the significance of the AEC-Q200 rating on the substitute part?

A: AEC-Q200 is an automotive industry qualification standard that certifies component reliability under automotive operating conditions. The RN73R2ATTD3973F100 carries this certification, indicating it meets stringent automotive reliability requirements. This certification is not present on the obsolete main part but does not restrict use in non-automotive applications.

Q: Are both parts RoHS compliant?

A: Yes. Both the RN732ATTD3973F100 and RN73R2ATTD3973F100 are ROHS3 compliant and REACH unaffected, meeting environmental regulatory requirements.

Q: What is the difference in packaging between these parts?

A: The main part (RN732ATTD3973F100) does not specify packaging format in the provided data. The substitute part (RN73R2ATTD3973F100) is supplied in Tape & Reel (TR) format, which is standard for automated assembly processes.

Q: Can the substitute part handle higher power dissipation?

A: The RN73R2ATTD3973F100 is rated at 0.125W (1/8W) compared to the main part's 0.1W (1/10W) rating. This higher power rating allows the substitute to dissipate additional thermal energy in the same physical package, providing design margin for applications operating near the original part's power limit.