RN732ATTD3901C50 Equivalent & Substitute Parts

Part Overview

The RN732ATTD3901C50 is a 3.9 kOhms ±0.25% 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 ±50ppm/°C and operating range of -55°C to 155°C.

The RN732ATTD3901C50 carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for new production runs, repairs, and system upgrades where this resistor specification is required.

Substiute Parts

RN732ATTD3901C50

KOA Speer Electronics, Inc.In Stock: 971RN732ATTD3901C50 Datasheet

Current PartRFQ

RN73R2ATTD3901C50

KOA Speer Electronics, Inc.In Stock: 797RN73R2ATTD3901C50 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RN732ATTD3901C50 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 3.9 kOhms
• Tolerance: ±0.25%
• Package / Case: 0805 (2012 Metric)
• Composition: Thin Film
• Temperature Coefficient: ±50ppm/°C
• Operating Temperature Range: -55°C ~ 155°C
• Features: Moisture Resistant

Allowable Variation:

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

The identified substitute RN73R2ATTD3901C50 meets all mandatory matching parameters and features an increased power rating of 0.125W (1/8W), making it a valid substitute for applications where the original 0.1W rating is sufficient or where additional power dissipation capability is beneficial.

Parameter Comparison

Engineering Selection Recommendations

The RN73R2ATTD3901C50 is the direct substitute for the obsolete RN732ATTD3901C50. Selection of this substitute is supported by the following factors:

Product Status: The substitute part carries Active product status, ensuring long-term availability and continued manufacturing support, whereas the original part is Obsolete.

Compliance and Certifications: Both parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating. The substitute part additionally carries Automotive AEC-Q200 qualification, providing enhanced reliability documentation for applications requiring automotive-grade components.

Electrical and Mechanical Equivalence: The substitute maintains identical resistance (3.9 kOhms), tolerance (±0.25%), temperature coefficient (±50ppm/°C), operating temperature range (-55°C ~ 155°C), and package dimensions (0805 / 2012 Metric). The increased power rating (0.125W versus 0.1W) provides additional thermal margin without affecting circuit performance.

Physical Compatibility: Identical package footprint and height ensure direct PCB layout compatibility without redesign requirements.

Frequently Asked Questions (FAQ)

Q: Can the RN73R2ATTD3901C50 be used as a direct replacement for the RN732ATTD3901C50?

A: Yes. The substitute part maintains identical electrical specifications (3.9 kOhms ±0.25%, ±50ppm/°C temperature coefficient, -55°C ~ 155°C operating range) and physical package (0805 / 2012 Metric). The increased power rating (0.125W versus 0.1W) is compatible with applications designed for the original 0.1W specification.

Q: What is the significance of the higher power rating in the substitute part?

A: The RN73R2ATTD3901C50 is rated at 0.125W (1/8W) compared to the original 0.1W (1/10W). This higher rating provides additional thermal dissipation capability and operational margin. For circuits designed around the 0.1W specification, the substitute will operate at lower junction temperatures, extending component life and improving reliability.

Q: Are there packaging differences between these parts?

A: Both parts use identical 0805 (2012 Metric) package format with matching dimensions (0.079" L x 0.049" W / 2.00mm x 1.25mm) and height (0.024" / 0.60mm maximum seated height). The substitute is available in Tape & Reel (TR) packaging, whereas the original part packaging format was not specified in the provided data.

Q: What compliance certifications apply to the substitute part?

A: The RN73R2ATTD3901C50 is ROHS3 compliant, REACH unaffected, and carries Automotive AEC-Q200 qualification. Both parts maintain MSL 1 (Unlimited) moisture sensitivity rating and are classified under ECCN EAR99 and HTSUS 8533.21.0030.

Q: Is the substitute part suitable for automotive applications?

A: The RN73R2ATTD3901C50 carries Automotive AEC-Q200 qualification, making it suitable for automotive-grade applications. The original RN732ATTD3901C50 did not carry this qualification. If automotive compliance is required, the substitute part provides this additional certification.