RN732ATTD4373C50 Equivalent & Substitute Parts

Part Overview

The RN732ATTD4373C50 is a 437 kOhms ±0.25% thin film chip resistor manufactured by KOA Speer Electronics, Inc., rated for 0.1W (1/10W) power dissipation in 0805 (2012 Metric) surface mount package. This component features moisture-resistant construction and operates across the temperature range of -55°C to 155°C.

The RN732ATTD4373C50 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this resistor specification.

Substiute Parts

RN732ATTD4373C50

KOA Speer Electronics, Inc.In Stock: 901RN732ATTD4373C50 Datasheet

Current PartRFQ

RN73R2ATTD4373C50

KOA Speer Electronics, Inc.In Stock: 1045RN73R2ATTD4373C50 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RN732ATTD4373C50 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 437 kOhms
• Tolerance: ±0.25%
• Package / Case: 0805 (2012 Metric)
• Composition: Thin Film
• Temperature Coefficient: ±50ppm/°C
• Operating Temperature Range: -55°C ~ 155°C
• Moisture Resistant feature

Allowable Variation:

• Power rating may be equal to or greater than the original specification (0.1W minimum)
• Product status may transition from obsolete to active
• Additional certifications (such as AEC-Q200) do not disqualify a substitute

The substitute part RN73R2ATTD4373C50 meets all mandatory matching parameters and provides an increased power rating of 0.125W (1/8W), which is compatible with applications designed for the original 0.1W specification.

Parameter Comparison

Engineering Selection Recommendations

The RN73R2ATTD4373C50 is a direct functional equivalent to the RN732ATTD4373C50 for applications requiring 437 kOhms ±0.25% thin film resistors in 0805 package format.

Selection Basis:

The substitute part maintains identical electrical specifications (resistance, tolerance, temperature coefficient, operating temperature range) and physical dimensions. The increased power rating of 0.125W (1/8W) compared to the original 0.1W specification provides additional thermal margin without affecting circuit performance in applications designed for the original component.

The RN73R2ATTD4373C50 carries active product status, ensuring ongoing availability and supply chain support. Both parts maintain ROHS3 compliance and unlimited moisture sensitivity level (MSL 1), supporting equivalent environmental and regulatory requirements.

The RN73R2ATTD4373C50 includes AEC-Q200 automotive qualification, which represents an additional certification layer. This certification does not restrict use in non-automotive applications and provides enhanced reliability documentation for quality-critical designs.

Frequently Asked Questions (FAQ)

Q: Can the RN73R2ATTD4373C50 be used as a direct replacement for the RN732ATTD4373C50?

A: Yes. Both parts share identical resistance (437 kOhms), tolerance (±0.25%), package (0805), composition (thin film), temperature coefficient (±50ppm/°C), and operating temperature range (-55°C ~ 155°C). The substitute part's higher power rating (0.125W vs. 0.1W) is compatible with circuits designed for the original specification.

Q: Are there physical dimension differences between these parts?

A: No. Both the RN732ATTD4373C50 and RN73R2ATTD4373C50 share identical dimensions: 0.079" L x 0.049" W (2.00mm x 1.25mm) with maximum seated height of 0.024" (0.60mm). PCB layout and assembly processes require no modification.

Q: What is the significance of the AEC-Q200 certification on the substitute part?

A: AEC-Q200 is an automotive industry qualification standard. The RN73R2ATTD4373C50 meets this certification, indicating enhanced reliability testing and quality assurance. This certification does not restrict the part's use in non-automotive applications and provides additional confidence in component performance across temperature and stress conditions.

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

A: No. A component with higher power rating dissipates heat more efficiently than required. In circuits designed for 0.1W dissipation, the 0.125W-rated substitute operates within its thermal envelope with improved margin, resulting in lower junction temperature and extended component life.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the RN732ATTD4373C50 and RN73R2ATTD4373C50 are ROHS3 compliant, meeting current environmental and regulatory requirements for electronic component manufacturing and use.

Q: What is the moisture sensitivity level for these resistors?

A: Both parts carry MSL 1 (Unlimited), indicating unlimited shelf life without moisture bake-out requirements. Standard storage conditions are sufficient for both components.