RN732ATTD40R7B50 Equivalent & Substitute Parts

Part Overview

The RN732ATTD40R7B50 is a 40.7 Ohm ±0.1% precision 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 component availability for production and repair applications. The substitute part maintains the same resistance value, tolerance, and package specifications while offering enhanced features and active product status.

Substiute Parts

RN732ATTD40R7B50

KOA Speer Electronics, Inc.In Stock: 936RN732ATTD40R7B50 Datasheet

Current PartRFQ

RN73R2ATTD40R7B50

KOA Speer Electronics, Inc.In Stock: 788RN73R2ATTD40R7B50 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RN732ATTD40R7B50 with the RN73R2ATTD40R7B50 is permissible based on the following criteria:

Matching Parameters (Substitution Basis):

• Resistance value: 40.7 Ohms (identical)
• Tolerance: ±0.1% (identical)
• Package / Case: 0805 (2012 Metric) (identical)
• Composition: Thin Film (identical)
• Temperature Coefficient: ±50ppm/°C (identical)
• Operating Temperature Range: -55°C ~ 155°C (identical)
• Moisture Resistance: Yes (identical)
• Physical Dimensions: 0.079" L x 0.049" W (2.00mm x 1.25mm) (identical)
• Height - Seated (Max): 0.024" (0.60mm) (identical)
• Number of Terminations: 2 (identical)
• RoHS Status: ROHS3 Compliant (identical)
• Moisture Sensitivity Level (MSL): 1 (Unlimited) (identical)
• REACH Status: REACH Unaffected (identical)

Differing Parameters (Enhancement):

• Power Rating: 0.125W (1/8W) versus 0.1W (1/10W) — substitute has higher power rating
• Product Status: Active versus Obsolete — substitute is currently manufactured
• Packaging: Tape & Reel (TR) versus bulk — substitute offers standard tape and reel packaging
• Series Designation: RN73R versus RN73 — automotive-grade series
• Features: Automotive AEC-Q200 certification added

The substitute part exceeds the minimum power requirement and maintains all critical electrical and mechanical parameters.

Parameter Comparison

Engineering Selection Recommendations

The RN73R2ATTD40R7B50 is a direct substitute for the obsolete RN732ATTD40R7B50 based on electrical and mechanical parameter equivalence. Selection of the substitute part is supported by the following factors:

Product Status Consideration: The main part is designated obsolete, making the active-status substitute the appropriate choice for ongoing production and procurement.

Compliance and Certification: Both parts maintain ROHS3 compliance and REACH unaffected status. The substitute part includes AEC-Q200 automotive qualification, which provides additional reliability assurance without introducing incompatibility.

Electrical Equivalence: Resistance value, tolerance, temperature coefficient, and operating temperature range are identical between both parts. The substitute's higher power rating (0.125W versus 0.1W) provides thermal margin without affecting circuit performance.

Physical Compatibility: Package type, dimensions, and termination count are identical, ensuring direct PCB footprint compatibility and assembly process compatibility.

Packaging Availability: The substitute is available in standard Tape & Reel (TR) format, supporting automated assembly workflows typical of production environments.

Frequently Asked Questions (FAQ)

Q: Can the RN73R2ATTD40R7B50 be used as a direct replacement for the RN732ATTD40R7B50 in existing designs?

A: Yes. Both parts share identical resistance value (40.7 Ohms), tolerance (±0.1%), package (0805), and operating specifications. The substitute meets or exceeds all electrical and mechanical requirements of the original part.

Q: What is the significance of the higher power rating (0.125W versus 0.1W) in the substitute part?

A: The substitute's 0.125W rating provides additional thermal dissipation capability. This enhancement does not affect circuit function and provides operational margin. No design modification is required.

Q: Does the AEC-Q200 automotive certification on the substitute part affect compatibility?

A: No. AEC-Q200 certification indicates enhanced reliability testing and qualification. This certification is an additional feature that does not introduce incompatibility with non-automotive applications.

Q: Are the physical dimensions identical between both parts?

A: Yes. Both parts are 0805 (2012 Metric) package with identical dimensions: 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 (TR) packaging?

A: Bulk packaging is suitable for manual handling and small-quantity applications. Tape & Reel (TR) packaging is standard for automated assembly processes and high-volume production. The substitute's TR format supports modern manufacturing workflows.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the RN732ATTD40R7B50 and RN73R2ATTD40R7B50 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the Moisture Sensitivity Level (MSL) for both parts?

A: Both parts have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Standard storage and handling procedures apply without special moisture control requirements.