RN732ATTD4591B10 Equivalent & Substitute Parts

Part Overview

The RN732ATTD4591B10 is a 4.59 kOhms ±0.1% thin film chip resistor manufactured by KOA Speer Electronics, Inc. in 0805 (2012 Metric) package format. This component is rated for 0.1W (1/10W) power dissipation with moisture-resistant construction and operates across -55°C to 155°C temperature range. The part is currently classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity.

Substiute Parts

RN732ATTD4591B10

KOA Speer Electronics, Inc.In Stock: 1230RN732ATTD4591B10 Datasheet

Current PartRFQ

RN73R2ATTD4591B10

KOA Speer Electronics, Inc.In Stock: 892RN73R2ATTD4591B10 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RN732ATTD4591B10 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 4.59 kOhms
• Tolerance: ±0.1%
• Package format: 0805 (2012 Metric)
• Composition: Thin Film
• Temperature coefficient: ±10ppm/°C
• Operating temperature range: -55°C to 155°C
• Moisture resistance capability

Allowable Variation:

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

The RN73R2ATTD4591B10 meets all mandatory matching criteria and provides increased power rating (0.125W/1/8W), making it a valid substitute for applications where the original part is no longer available.

Parameter Comparison

Engineering Selection Recommendations

The RN73R2ATTD4591B10 is the direct substitute for the obsolete RN732ATTD4591B10. Selection is based on the following factors:

Product Status: The substitute part maintains active product status with KOA Speer Electronics, Inc., ensuring continued availability and supply chain reliability compared to the obsolete main part.

Electrical Equivalence: Both parts maintain identical resistance (4.59 kOhms), tolerance (±0.1%), temperature coefficient (±10ppm/°C), and operating temperature range (-55°C to 155°C). The substitute's increased power rating (0.125W versus 0.1W) provides additional thermal margin without affecting circuit performance.

Compliance: Both parts are ROHS3 compliant with MSL rating of 1 (Unlimited), meeting environmental and moisture sensitivity requirements. The substitute carries AEC-Q200 automotive qualification, providing enhanced reliability documentation.

Physical Compatibility: Identical package dimensions (0805/2012 Metric), footprint, and termination count ensure direct PCB layout compatibility without design modification.

Frequently Asked Questions (FAQ)

Q: Can RN73R2ATTD4591B10 be used as a direct replacement for RN732ATTD4591B10?

A: Yes. Both parts share identical resistance value, tolerance, package format, temperature coefficient, and operating temperature range. The substitute's higher power rating (0.125W versus 0.1W) is compatible with applications designed for the original 0.1W part.

Q: What is the difference between these two parts?

A: The primary differences are product status (obsolete versus active), power rating (0.1W versus 0.125W), and automotive qualification (RN73R2ATTD4591B10 carries AEC-Q200 rating). Electrical and mechanical specifications remain identical.

Q: Are the physical dimensions identical?

A: Yes. Both parts use 0805 (2012 Metric) package with dimensions of 0.079" L x 0.049" W (2.00mm x 1.25mm) and maximum seated height of 0.024" (0.60mm). PCB footprints are interchangeable.

Q: Does the higher power rating of the substitute affect circuit operation?

A: No. The substitute's 0.125W rating is a superset of the original 0.1W specification. Applications designed for 0.1W operation will function identically with the substitute part.

Q: Are both parts RoHS compliant?

A: Yes. Both RN732ATTD4591B10 and RN73R2ATTD4591B10 are ROHS3 compliant with MSL rating of 1 (Unlimited moisture sensitivity level).

Q: What packaging options are available for the substitute?

A: The RN73R2ATTD4591B10 is supplied in Tape & Reel (TR) packaging format.