RN732ATTD39R0C50 Equivalent & Substitute Parts

Part Overview

The RN732ATTD39R0C50 is a 39 Ohm ±0.25% thin film chip resistor manufactured by KOA Speer Electronics, Inc. in 0805 (2012 Metric) package format with 0.1W power rating. This component is classified as obsolete product status, necessitating identification of active equivalent alternatives for ongoing design requirements and procurement continuity.

Substiute Parts

RN732ATTD39R0C50

KOA Speer Electronics, Inc.In Stock: 976RN732ATTD39R0C50 Datasheet

Current PartRFQ

RN73R2ATTD39R0C50

KOA Speer Electronics, Inc.In Stock: 1084RN73R2ATTD39R0C50 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RN732ATTD39R0C50 is determined by strict equivalence across the following parameters:

Critical Matching Parameters:

• Resistance value: 39 Ohms
• Tolerance: ±0.25%
• Package format: 0805 (2012 Metric)
• Composition: Thin Film
• Temperature coefficient: ±50ppm/°C
• Operating temperature range: -55°C ~ 155°C
• Moisture resistance capability

Allowable Variation:

• Power rating: The substitute part RN73R2ATTD39R0C50 features 0.125W (1/8W) rating, which exceeds the original 0.1W specification. Higher power rating in identical package dimensions is acceptable for direct substitution as it provides equivalent or superior thermal performance characteristics.

Compliance Equivalence:

• RoHS3 compliance maintained
• MSL Level 1 maintained
• REACH unaffected status maintained

Parameter Comparison

Engineering Selection Recommendations

The RN73R2ATTD39R0C50 serves as the direct active equivalent for the obsolete RN732ATTD39R0C50. Selection of this substitute is based on the following engineering criteria:

Product Status Alignment: The substitute part maintains active product status with KOA Speer Electronics, Inc., ensuring long-term availability and supply chain continuity compared to the obsolete main part.

Electrical Equivalence: Resistance value, tolerance, temperature coefficient, and operating temperature range are identical across both parts. The increased power rating (0.125W versus 0.1W) in the same 0805 package provides equivalent or superior thermal dissipation capability without dimensional or thermal characteristic changes.

Compliance Maintenance: Both parts maintain ROHS3 compliance, MSL Level 1 rating, and REACH unaffected status. The substitute part includes additional AEC-Q200 automotive qualification, which does not restrict use in non-automotive applications.

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

Frequently Asked Questions (FAQ)

Q: Can RN73R2ATTD39R0C50 be used as a direct replacement for RN732ATTD39R0C50?

A: Yes. The substitute part is electrically and mechanically equivalent. Identical resistance, tolerance, temperature coefficient, package format, and operating temperature range permit direct substitution. The higher power rating does not create compatibility issues.

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

A: The substitute part's 0.125W rating exceeds the original 0.1W specification. In identical 0805 package dimensions, this represents improved thermal performance capability. For applications requiring 0.1W or less, the substitute part operates within safe thermal margins.

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

A: No. AEC-Q200 qualification represents additional testing and quality assurance. This certification does not restrict the part's use in non-automotive circuits and does not alter electrical or mechanical characteristics.

Q: Are there packaging differences between these parts?

A: The main part RN732ATTD39R0C50 is listed without specified packaging format. The substitute RN73R2ATTD39R0C50 is supplied in Tape & Reel (TR) format. Both parts use identical 0805 (2012 Metric) package specifications and are compatible with standard SMD assembly processes.

Q: What is the basis for substitution compatibility?

A: Substitution is based on matching resistance value (39 Ohms), tolerance (±0.25%), composition (thin film), package format (0805), temperature coefficient (±50ppm/°C), operating temperature range (-55°C ~ 155°C), and compliance certifications (ROHS3, MSL 1). The substitute part meets or exceeds all specified parameters.

Q: Is the substitute part suitable for high-precision applications?

A: Yes. The ±0.25% tolerance specification is maintained in the substitute part, supporting high-precision circuit requirements. Temperature coefficient of ±50ppm/°C is identical across both parts.