RN732ATTD3010C50 Equivalent & Substitute Parts

Part Overview

The RN732ATTD3010C50 is a 301 Ohm thin film chip resistor manufactured by KOA Speer Electronics, Inc., rated at 0.1W (1/10W) in 0805 (2012 Metric) package format. This component features ±0.25% tolerance, moisture resistance, and operates across -55°C to 155°C. The part is classified as obsolete, necessitating identification of active equivalent alternatives for ongoing procurement and design continuity.

Substiute Parts

RN732ATTD3010C50

KOA Speer Electronics, Inc.In Stock: 999RN732ATTD3010C50 Datasheet

Current PartRFQ

RN73R2ATTD3010C50

KOA Speer Electronics, Inc.In Stock: 963RN73R2ATTD3010C50 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RN732ATTD3010C50 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 301 Ohms
• Tolerance: ±0.25%
• Package format: 0805 (2012 Metric)
• Composition: Thin Film
• Temperature coefficient: ±50ppm/°C
• Operating temperature range: -55°C ~ 155°C
• Moisture resistance capability
• RoHS3 compliance
• MSL rating: 1 (Unlimited)

Allowable Variation:

• Power rating: Substitute parts may have equal or higher power ratings (0.125W or greater is acceptable for 0.1W applications)
• Product status: Active alternatives are preferred over obsolete parts
• Automotive qualification: Additional certifications (AEC-Q200) do not disqualify substitution

The RN73R2ATTD3010C50 meets all mandatory parameters with an increased power rating of 0.125W (1/8W) and active product status.

Parameter Comparison

Engineering Selection Recommendations

The RN73R2ATTD3010C50 is a direct functional equivalent to the obsolete RN732ATTD3010C50. Selection criteria are based on the following factors:

Product Status: The RN73R2ATTD3010C50 maintains active product status, ensuring long-term availability and supply chain continuity compared to the obsolete RN732ATTD3010C50.

Electrical Equivalence: Both parts maintain identical resistance (301 Ohms), tolerance (±0.25%), temperature coefficient (±50ppm/°C), and operating temperature range (-55°C ~ 155°C). The increased power rating of the substitute (0.125W versus 0.1W) provides additional thermal margin without affecting circuit performance in applications designed for 0.1W operation.

Compliance: Both parts are ROHS3 compliant with MSL rating 1 (Unlimited), meeting environmental and moisture sensitivity requirements. The substitute includes AEC-Q200 automotive qualification, which does not restrict use in non-automotive applications.

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

Frequently Asked Questions (FAQ)

Q: Can RN73R2ATTD3010C50 replace RN732ATTD3010C50 in existing designs?

A: Yes. The RN73R2ATTD3010C50 is electrically and mechanically equivalent. Identical resistance, tolerance, temperature coefficient, and operating range ensure functional compatibility. The higher power rating (0.125W vs 0.1W) is acceptable for applications designed for 0.1W operation.

Q: What is the significance of the power rating difference?

A: The substitute part has a 0.125W rating compared to the original 0.1W rating. In circuit applications, the substitute can dissipate more power without exceeding temperature limits. This does not affect circuits operating within the original 0.1W specification.

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

A: No. AEC-Q200 is an additional qualification that does not restrict use in non-automotive applications. The substitute meets all requirements of the original part and exceeds them with automotive-grade reliability.

Q: Are the physical dimensions identical?

A: Yes. Both parts use the 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). Direct PCB substitution is possible without layout modification.

Q: What is the difference between the packaging formats?

A: The original part packaging format is not specified. The substitute is supplied in Tape & Reel (TR) format, which is standard for high-volume automated assembly. This does not affect component performance or compatibility.

Q: Are both parts RoHS3 compliant?

A: Yes. Both RN732ATTD3010C50 and RN73R2ATTD3010C50 are ROHS3 compliant with MSL rating 1 (Unlimited), meeting environmental and moisture sensitivity requirements.