RN732ATTD3971D50 Equivalent & Substitute Parts

Part Overview

The RN732ATTD3971D50 is a 3.97 kOhms ±0.5% thin film chip resistor in 0805 (2012 Metric) package rated for 0.1W (1/10W) power dissipation. This component is manufactured by KOA Speer Electronics, Inc. and features moisture-resistant construction with a temperature coefficient of ±50ppm/°C and operating range of -55°C to 155°C.

The RN732ATTD3971D50 carries an Obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this resistor specification.

Substiute Parts

RN732ATTD3971D50

KOA Speer Electronics, Inc.In Stock: 1040RN732ATTD3971D50 Datasheet

Current PartRFQ

RN73R2ATTD3971D50

KOA Speer Electronics, Inc.In Stock: 1127RN73R2ATTD3971D50 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RN732ATTD3971D50 is determined by strict equivalence in the following critical parameters:

Mandatory Matching Parameters:

• Resistance Value: 3.97 kOhms
• Tolerance: ±0.5%
• Package / Case: 0805 (2012 Metric)
• Composition: Thin Film
• Temperature Coefficient: ±50ppm/°C
• Operating Temperature Range: -55°C to 155°C
• Moisture Resistant Feature

Allowable Variation:

• Power Rating: The substitute part may have equal or higher power rating than the original 0.1W specification, provided all other electrical and mechanical parameters remain identical.

The RN73R2ATTD3971D50 meets all mandatory matching criteria and qualifies as a direct substitute with an upgraded power rating of 0.125W (1/8W), which is compatible with circuits designed for the original 0.1W component.

Parameter Comparison

Engineering Selection Recommendations

The RN73R2ATTD3971D50 is the qualified substitute for the obsolete RN732ATTD3971D50. Selection of this substitute is based on the following engineering factors:

Product Status: The RN73R2ATTD3971D50 maintains Active product status, ensuring continued availability and supply chain support compared to the Obsolete status of the original part.

Compliance and Certifications: Both parts maintain ROHS3 compliance and identical moisture sensitivity ratings (MSL 1 - Unlimited). The substitute part carries additional Automotive AEC-Q200 qualification, which provides enhanced reliability documentation without introducing incompatibility.

Electrical and Mechanical Compatibility: The substitute part maintains identical resistance value, tolerance, temperature coefficient, operating temperature range, and physical package dimensions. The increased power rating (0.125W versus 0.1W) provides additional thermal margin and is fully compatible with circuits designed for the original 0.1W specification.

Supply Availability: Current inventory status indicates both parts are in stock; however, the Active status of the substitute ensures long-term procurement viability.

Frequently Asked Questions (FAQ)

Q: Can the RN73R2ATTD3971D50 be used as a direct replacement for the RN732ATTD3971D50 in existing designs?

A: Yes. The RN73R2ATTD3971D50 is electrically and mechanically compatible. All critical parameters including resistance value, tolerance, temperature coefficient, operating temperature range, and package dimensions are identical. The higher power rating (0.125W versus 0.1W) does not create incompatibility and provides additional thermal capability.

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

A: The substitute part is rated for 0.125W (1/8W) compared to the original 0.1W (1/10W). This represents a 25% increase in power dissipation capability. Circuits designed for the original 0.1W component will operate within the thermal limits of the substitute part without modification.

Q: Are there packaging differences between these parts?

A: Both parts use identical 0805 (2012 Metric) package with matching physical dimensions (0.079" L x 0.049" W, 2.00mm x 1.25mm) and height (0.024" maximum seated height). The RN73R2ATTD3971D50 is supplied in Tape & Reel (TR) packaging format.

Q: What does the AEC-Q200 qualification on the substitute part indicate?

A: AEC-Q200 is an automotive industry qualification standard. The presence of this certification on the RN73R2ATTD3971D50 indicates enhanced reliability testing and quality assurance. This certification does not affect compatibility with non-automotive applications.

Q: Are both parts RoHS compliant?

A: Yes. Both the RN732ATTD3971D50 and RN73R2ATTD3971D50 are ROHS3 compliant and carry identical Moisture Sensitivity Level ratings (MSL 1 - Unlimited), indicating no moisture sensitivity restrictions.