RN732ATTD1183C50 Equivalent & Substitute Parts

Part Overview

The RN732ATTD1183C50 is a 118 kOhms ±0.25% thin film chip resistor in 0805 (2012 Metric) package rated for 0.1W (1/10W) power dissipation. Manufactured by KOA Speer Electronics, Inc., this component features moisture-resistant construction and operates across -55°C to 155°C. The part is currently classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement.

Substiute Parts

RN732ATTD1183C50

KOA Speer Electronics, Inc.In Stock: 1132RN732ATTD1183C50 Datasheet

Current PartRFQ

RN73R2ATTD1183C50

KOA Speer Electronics, Inc.In Stock: 1148RN73R2ATTD1183C50 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RN732ATTD1183C50 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 118 kOhms
• Tolerance: ±0.25%
• Package type: 0805 (2012 Metric)
• Composition: Thin Film
• Temperature coefficient: ±50ppm/°C
• Operating temperature range: -55°C to 155°C
• Moisture resistance: Required
• RoHS3 compliance: Required

Allowable Variation:

• Power rating: May be equal to or greater than 0.1W
• Product status: Active status preferred for obsolete parts
• Packaging format: May differ (bulk to tape & reel conversion acceptable)
• Automotive qualification: May be added without affecting base functionality

The RN73R2ATTD1183C50 meets all mandatory parameters while offering enhanced power rating (0.125W) and automotive AEC-Q200 qualification, making it a direct functional substitute.

Parameter Comparison

Engineering Selection Recommendations

The RN73R2ATTD1183C50 is the direct equivalent substitute for the obsolete RN732ATTD1183C50. Selection is based on the following engineering criteria:

Functional Equivalence: Both parts maintain identical electrical specifications across resistance, tolerance, temperature coefficient, and operating temperature range. The thin film construction and moisture-resistant properties are preserved.

Power Rating Enhancement: The substitute provides 0.125W rating compared to the original 0.1W specification. This represents a 25% increase in power dissipation capability within the same 0805 package footprint, providing additional thermal margin without circuit redesign.

Product Status: The substitute is classified as Active, ensuring long-term availability and supply chain continuity. The original part's obsolete status creates procurement risk and supply uncertainty.

Compliance and Certification: Both parts maintain ROHS3 compliance and MSL 1 rating. The substitute adds AEC-Q200 automotive qualification, which does not restrict use in non-automotive applications and indicates enhanced reliability screening.

Packaging Consideration: The substitute is supplied in Tape & Reel format, standard for production assembly. Original bulk packaging is no longer available due to obsolescence.

Frequently Asked Questions (FAQ)

Q: Can the RN73R2ATTD1183C50 be used as a direct replacement for RN732ATTD1183C50 in existing designs?

A: Yes. The substitute maintains all critical electrical parameters: 118 kOhms resistance, ±0.25% tolerance, ±50ppm/°C temperature coefficient, and -55°C to 155°C operating range. Package dimensions and footprint are identical (0805/2012 Metric). No circuit modifications are required.

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

A: The increased power rating provides additional thermal headroom. If the original design dissipates 0.1W or less in the resistor, the substitute will operate at lower junction temperature, extending component life and improving reliability margins. This is a beneficial characteristic with no negative impact.

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

A: No. AEC-Q200 qualification indicates the part has undergone additional reliability testing and screening. This certification does not restrict use in non-automotive circuits and represents enhanced quality assurance.

Q: Are the physical dimensions identical between the two parts?

A: Yes. Both parts are 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 identical.

Q: What is the difference between bulk and Tape & Reel packaging?

A: Bulk packaging contains loose components; Tape & Reel (TR) packaging supplies components on continuous tape for automated assembly equipment. The electrical and mechanical specifications are identical. TR format is standard for production manufacturing.

Q: Are both parts RoHS3 compliant?

A: Yes. Both RN732ATTD1183C50 and RN73R2ATTD1183C50 are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, indicating no special storage or handling requirements.