RN732ATTD12R9D25 Equivalent & Substitute Parts

Part Overview

The RN732ATTD12R9D25 is a 12.9 Ohm ±0.5% 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. Due to its obsolete designation, identifying equivalent and substitute parts is necessary to maintain design continuity and ensure supply chain availability for applications requiring this resistance value and electrical specification.

Substiute Parts

RN732ATTD12R9D25

KOA Speer Electronics, Inc.In Stock: 938RN732ATTD12R9D25 Datasheet

Current PartRFQ

RN73R2ATTD12R9D25

KOA Speer Electronics, Inc.In Stock: 1084RN73R2ATTD12R9D25 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RN732ATTD12R9D25 is determined by strict equivalence in the following parameters:

Critical Parameters for Substitution:

• Resistance value: 12.9 Ohms
• Tolerance: ±0.5%
• Package format: 0805 (2012 Metric)
• Composition: Thin Film
• Temperature Coefficient: ±25ppm/°C
• Operating Temperature Range: -55°C ~ 155°C
• Moisture Resistance: Required
• RoHS3 Compliance: Required

Allowable Variation:

• Power rating may be equal to or greater than 0.1W
• Product status may transition from obsolete to active
• Packaging format may differ (bulk to Tape & Reel)
• Additional certifications (such as AEC-Q200) are permissible

The substitute part RN73R2ATTD12R9D25 meets all critical parameters while offering enhanced power rating (0.125W) and automotive qualification (AEC-Q200), with active product status ensuring continued availability.

Parameter Comparison

Engineering Selection Recommendations

The RN73R2ATTD12R9D25 is a direct functional substitute for the obsolete RN732ATTD12R9D25. Selection of this substitute is supported by the following engineering factors:

Product Status Consideration: The main part is classified as obsolete, creating supply risk. The substitute maintains active product status with KOA Speer Electronics, ensuring long-term availability and manufacturing continuity.

Electrical Equivalence: Both parts maintain identical resistance (12.9 Ohms), tolerance (±0.5%), temperature coefficient (±25ppm/°C), and operating temperature range (-55°C ~ 155°C). These parameters ensure functional interchangeability in circuit applications.

Power Rating Enhancement: The substitute provides 0.125W power rating compared to the main part's 0.1W rating. This higher rating provides additional thermal margin without affecting circuit performance in applications designed for the original 0.1W specification.

Compliance and Certification: Both parts are ROHS3 compliant with MSL 1 rating. The substitute includes AEC-Q200 automotive qualification, which does not restrict use in non-automotive applications and provides additional quality assurance.

Physical Compatibility: Identical 0805 (2012 Metric) package dimensions and termination configuration ensure direct PCB footprint compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can RN73R2ATTD12R9D25 be used as a direct replacement for RN732ATTD12R9D25 on existing PCBs?

A: Yes. Both parts share identical 0805 package dimensions (0.079" L x 0.049" W, 2.00mm x 1.25mm), height (0.024" maximum), and two-termination configuration. No PCB layout changes are required.

Q: What is the difference in power rating between these parts?

A: The main part is rated 0.1W (1/10W), while the substitute is rated 0.125W (1/8W). The substitute's higher power rating provides additional thermal dissipation capability. Applications designed for 0.1W operation will function within the substitute's specifications.

Q: Are the electrical characteristics identical?

A: Yes. Both parts provide 12.9 Ohms ±0.5% resistance with ±25ppm/°C temperature coefficient and -55°C ~ 155°C operating range. Electrical performance is equivalent.

Q: Why does the substitute have AEC-Q200 certification?

A: AEC-Q200 is an automotive qualification standard. The substitute meets this standard, indicating enhanced quality and reliability testing. This certification does not restrict use in non-automotive applications and represents additional quality assurance.

Q: What is the packaging difference?

A: The main part is supplied in bulk packaging, while the substitute is supplied in Tape & Reel (TR) format. Both contain identical components; packaging format differs only in presentation and handling method.

Q: Is the substitute RoHS compliant?

A: Yes. The substitute RN73R2ATTD12R9D25 is ROHS3 compliant, matching the main part's compliance status.

Q: What is MSL 1 rating?

A: Moisture Sensitivity Level 1 indicates unlimited shelf life without moisture control requirements. Both parts carry MSL 1 rating, requiring no special storage conditions.