Equivalent & Substitute Parts for RN732ATTD3003B25

Part Overview

The RN732ATTD3003B25 is a 300 kOhms ±0.1% thin film chip resistor manufactured by KOA Speer Electronics, Inc., rated at 0.1W (1/10W) in 0805 (2012 Metric) package format. This component is classified as obsolete product status. Due to its obsolete designation, identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for ongoing production and repair applications.

Substiute Parts

RN732ATTD3003B25

KOA Speer Electronics, Inc.In Stock: 811RN732ATTD3003B25 Datasheet

Current PartRFQ

RN73R2ATTD3003B25

KOA Speer Electronics, Inc.In Stock: 915RN73R2ATTD3003B25 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RN732ATTD3003B25 is determined by strict equivalence in the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 300 kOhms
• Tolerance: ±0.1%
• Package / Case: 0805 (2012 Metric)
• Composition: Thin Film
• Temperature Coefficient: ±25ppm/°C
• Operating Temperature Range: -55°C ~ 155°C
• Moisture Resistant feature
• RoHS3 Compliance

Allowable Variation:

• Power rating may be equal or higher than the original 0.1W specification
• Product status may transition from obsolete to active
• Additional certifications (such as AEC-Q200) may be present in substitute parts

The substitute part RN73R2ATTD3003B25 meets all mandatory matching parameters and includes an increased power rating of 0.125W (1/8W) with automotive AEC-Q200 qualification, making it a valid substitute for the obsolete RN732ATTD3003B25.

Parameter Comparison

Engineering Selection Recommendations

The RN73R2ATTD3003B25 is a direct substitute for the obsolete RN732ATTD3003B25 based on the following engineering criteria:

Compliance and Certification: Both parts maintain ROHS3 compliance and identical moisture sensitivity ratings (MSL 1). The substitute part adds automotive AEC-Q200 qualification, which provides additional reliability assurance for demanding applications.

Product Status Advantage: The substitute part holds active product status, ensuring long-term availability and supply chain continuity compared to the obsolete main part.

Electrical and Mechanical Compatibility: Identical resistance, tolerance, temperature coefficient, and operating temperature range ensure functional equivalence. The increased power rating (0.125W versus 0.1W) provides additional thermal margin without affecting circuit performance in applications designed for the original 0.1W specification.

Physical Compatibility: Identical package dimensions and termination count ensure direct PCB footprint compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can RN73R2ATTD3003B25 be used as a direct replacement for RN732ATTD3003B25?

A: Yes. Both parts share identical resistance (300 kOhms), tolerance (±0.1%), package (0805), composition (thin film), temperature coefficient (±25ppm/°C), and operating temperature range (-55°C ~ 155°C). The substitute part has a higher power rating (0.125W versus 0.1W), which is acceptable for applications designed for the original part.

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

A: The increased power rating from 0.1W to 0.125W provides additional thermal dissipation capability. This does not affect circuit operation in applications originally designed for 0.1W; it only provides additional safety margin under thermal stress conditions.

Q: Does the AEC-Q200 automotive qualification affect non-automotive applications?

A: No. AEC-Q200 qualification indicates enhanced reliability testing and quality assurance. This certification does not restrict use in non-automotive applications; it only confirms the part meets automotive industry standards.

Q: Are there any PCB layout or assembly changes required when substituting these parts?

A: No. Both parts are identical in physical dimensions (0.079" L x 0.049" W, 2.00mm x 1.25mm) and height (0.024" maximum seated height). No PCB layout modifications or assembly process changes are necessary.

Q: What is the difference between the series designations RN73 and RN73R?

A: The RN73R series includes automotive AEC-Q200 qualification and represents an active product line, while the RN73 series (including the obsolete RN732ATTD3003B25) does not carry this automotive certification. Both series share identical electrical and mechanical specifications for the 300 kOhms ±0.1% 0805 package configuration.