RN732ATTD1243C50 Equivalent & Substitute Parts

Part Overview

The RN732ATTD1243C50 is a 124 kOhms ±0.25% thin film chip resistor in 0805 (2012 Metric) package rated for 0.1W (1/10W) operation. Manufactured by KOA Speer Electronics, Inc., this component features moisture-resistant construction and operates across -55°C to 155°C. The part is currently obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement.

Substiute Parts

RN732ATTD1243C50

KOA Speer Electronics, Inc.In Stock: 836RN732ATTD1243C50 Datasheet

Current PartRFQ

RN73R2ATTD1243C50

KOA Speer Electronics, Inc.In Stock: 996RN73R2ATTD1243C50 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RN732ATTD1243C50 is determined by the following critical parameters:

• Resistance value: 124 kOhms (exact match required)
• Tolerance: ±0.25% (exact match required)
• Package: 0805 (2012 Metric) (exact match required)
• Composition: Thin Film (exact match required)
• Temperature Coefficient: ±50ppm/°C (exact match required)
• Operating Temperature Range: -55°C ~ 155°C (exact match required)
• Moisture Resistance: Required feature
• RoHS3 Compliance: Required
• MSL Rating: 1 (Unlimited)

The RN73R2ATTD1243C50 meets all substitution criteria. While its power rating is 0.125W (1/8W) compared to the original 0.1W (1/10W), this represents a higher capability and does not restrict substitution in applications designed for the original part. The substitute maintains identical electrical characteristics, package dimensions, and environmental specifications.

Parameter Comparison

Engineering Selection Recommendations

The RN73R2ATTD1243C50 is the direct substitute for the obsolete RN732ATTD1243C50. Both parts are ROHS3 compliant and maintain identical electrical and mechanical specifications across all critical parameters. The substitute carries active product status, ensuring continued availability and supply chain reliability.

The RN73R2ATTD1243C50 includes AEC-Q200 automotive qualification, providing additional quality assurance beyond the original part specification. The increased power rating (0.125W versus 0.1W) presents no compatibility concerns and may provide enhanced thermal margin in applications operating near maximum power dissipation limits.

Frequently Asked Questions (FAQ)

Q: Can the RN73R2ATTD1243C50 be used as a direct replacement for the RN732ATTD1243C50?

A: Yes. Both parts share identical resistance value, tolerance, package dimensions, composition, temperature coefficient, and operating temperature range. The substitute is electrically and mechanically interchangeable.

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

A: The RN73R2ATTD1243C50 is rated for 0.125W compared to the original 0.1W. This represents increased capability and does not restrict use in circuits designed for the original part. Applications operating within the original 0.1W specification will function identically.

Q: Does the AEC-Q200 rating on the substitute affect compatibility?

A: No. AEC-Q200 is an automotive qualification standard that indicates additional quality and reliability testing. Its presence on the substitute part does not create incompatibility with non-automotive applications.

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

A: Yes. Both parts are 0805 (2012 Metric) package with identical length (0.079"), width (0.049"), and maximum seated height (0.024"). PCB footprints and assembly processes are identical.

Q: What is the MSL rating and why does it matter?

A: Both parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity limitations. Storage and handling requirements are identical between the original and substitute parts.