RN732ATTD3972D50 Equivalent & Substitute Parts

Part Overview

The RN732ATTD3972D50 is a 39.7 kOhms ±0.5% thin film chip resistor manufactured by KOA Speer Electronics, Inc. in the 0805 (2012 Metric) package format. This component is rated for 0.1W (1/10W) power dissipation with moisture-resistant construction and operates across the temperature range of -55°C to 155°C.

The RN732ATTD3972D50 carries an Obsolete product status. 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

RN732ATTD3972D50

KOA Speer Electronics, Inc.In Stock: 1011RN732ATTD3972D50 Datasheet

Current PartRFQ

RN73R2ATTD3972D50

KOA Speer Electronics, Inc.In Stock: 741RN73R2ATTD3972D50 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RN732ATTD3972D50 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 39.7 kOhms
• Tolerance: ±0.5%
• Package / Case: 0805 (2012 Metric)
• Composition: Thin Film
• Temperature Coefficient: ±50ppm/°C
• Operating Temperature Range: -55°C ~ 155°C
• Moisture Resistant construction

Allowable Variation:

• Power rating may be equal to or greater than the original specification (0.1W minimum)
• Product status may transition from Obsolete to Active
• Additional certifications (such as AEC-Q200) do not disqualify substitution

The RN73R2ATTD3972D50 meets all mandatory matching parameters and represents a valid substitute with enhanced power rating (0.125W) and automotive qualification.

Parameter Comparison

Engineering Selection Recommendations

The RN73R2ATTD3972D50 is the direct substitute for the obsolete RN732ATTD3972D50. Both components share identical electrical specifications (39.7 kOhms, ±0.5% tolerance, ±50ppm/°C temperature coefficient) and mechanical compatibility (0805 package, identical dimensions and termination count).

The RN73R2ATTD3972D50 provides superior supply chain availability with Active product status. The increased power rating (0.125W versus 0.1W) represents a design margin enhancement and does not introduce incompatibility. Both components maintain ROHS3 compliance and MSL 1 rating.

The RN73R2ATTD3972D50 includes AEC-Q200 automotive qualification, which adds functional capability without restricting application scope. This component is suitable for direct replacement in all applications originally specified for the RN732ATTD3972D50.

Frequently Asked Questions (FAQ)

Q: Can the RN73R2ATTD3972D50 replace the RN732ATTD3972D50 in existing designs?

A: Yes. The RN73R2ATTD3972D50 maintains identical resistance (39.7 kOhms), tolerance (±0.5%), package format (0805), and temperature characteristics (±50ppm/°C, -55°C ~ 155°C). The increased power rating (0.125W) and Active product status make it a direct substitute.

Q: What is the significance of the power rating difference (0.1W versus 0.125W)?

A: The RN73R2ATTD3972D50 power rating of 0.125W exceeds the original 0.1W specification. This represents a 25% increase in power dissipation capability and provides additional thermal margin. No design modification is required.

Q: Are there packaging differences between these components?

A: No. 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 (0.024" / 0.60mm). PCB footprints and assembly processes remain unchanged.

Q: Does the AEC-Q200 certification on the RN73R2ATTD3972D50 affect non-automotive applications?

A: No. AEC-Q200 certification indicates automotive-grade qualification and does not restrict use in other applications. The component remains fully compatible with all original design specifications.

Q: What is the moisture sensitivity level for both components?

A: Both the RN732ATTD3972D50 and RN73R2ATTD3972D50 carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions. Standard handling and storage procedures apply to both components.