RN732ATTD4020F10 Equivalent & Substitute Parts

Part Overview

The RN732ATTD4020F10 is a 402 Ohms ±1% 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 moisture-resistant construction and operates across the temperature range of -55°C to 155°C. The part is currently classified as obsolete, necessitating identification of functionally equivalent alternatives to maintain design continuity and ensure supply chain availability for applications requiring this specific resistance value and tolerance specification.

Substiute Parts

RN732ATTD4020F10

KOA Speer Electronics, Inc.In Stock: 751RN732ATTD4020F10 Datasheet

Current PartRFQ

RN73R2ATTD4020F10

KOA Speer Electronics, Inc.In Stock: 746RN73R2ATTD4020F10 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RN732ATTD4020F10 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 402 Ohms
• Tolerance: ±1%
• Package format: 0805 (2012 Metric)
• Composition: Thin Film
• Temperature coefficient: ±10ppm/°C
• Operating temperature range: -55°C ~ 155°C
• Moisture resistance capability
• RoHS3 compliance

Allowable Variation:

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

The substitute part RN73R2ATTD4020F10 meets all mandatory matching parameters while offering an increased power rating of 0.125W (1/8W) and active product status with automotive qualification.

Parameter Comparison

Engineering Selection Recommendations

The RN73R2ATTD4020F10 serves as a direct functional substitute for the obsolete RN732ATTD4020F10. Both components maintain identical electrical specifications across resistance, tolerance, temperature coefficient, and operating temperature range. The substitute part provides the following advantages:

Product Status: The RN73R2ATTD4020F10 maintains active product status, ensuring continued availability and supply chain reliability compared to the obsolete main part.

Power Rating Enhancement: The substitute offers 0.125W (1/8W) power rating versus the original 0.1W (1/10W), providing increased thermal headroom without altering circuit behavior or requiring design modifications.

Compliance Certifications: Both parts maintain ROHS3 compliance and REACH unaffected status. The substitute additionally carries AEC-Q200 automotive qualification, which does not restrict its use in non-automotive applications.

Physical Compatibility: Identical package dimensions, termination count, and MSL rating ensure direct mechanical and thermal compatibility in existing PCB layouts.

Selection of RN73R2ATTD4020F10 eliminates obsolescence risk while maintaining full electrical and mechanical equivalence to the original specification.

Frequently Asked Questions (FAQ)

Q: Can RN73R2ATTD4020F10 be used as a direct replacement for RN732ATTD4020F10 without circuit redesign?

A: Yes. Both parts share identical resistance (402 Ohms), tolerance (±1%), temperature coefficient (±10ppm/°C), operating temperature range (-55°C ~ 155°C), and package format (0805). The increased power rating of the substitute (0.125W vs. 0.1W) does not require design modification.

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

A: The RN73R2ATTD4020F10 is rated at 0.125W compared to the original 0.1W. This higher rating provides additional thermal margin and does not affect electrical performance in circuits designed for the lower rating. The component will operate within specification in all applications where the original part was used.

Q: Does the AEC-Q200 automotive qualification on the substitute part affect its use in non-automotive applications?

A: No. AEC-Q200 certification indicates the part meets automotive reliability standards and does not restrict its application in general industrial, consumer, or other non-automotive circuits. The certification represents an additional qualification level.

Q: Are the physical dimensions and PCB footprints identical between the two parts?

A: Yes. Both parts are packaged in 0805 (2012 Metric) format with identical dimensions of 0.079" L x 0.049" W (2.00mm x 1.25mm) and maximum seated height of 0.024" (0.60mm). No PCB layout modifications are required.

Q: What is the Moisture Sensitivity Level (MSL) for both parts, and what does it mean?

A: Both parts carry MSL rating of 1 (Unlimited), indicating unlimited shelf life without moisture bake-out requirements. This simplifies inventory management and storage procedures.

Q: Are both parts RoHS3 compliant?

A: Yes. Both RN732ATTD4020F10 and RN73R2ATTD4020F10 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components.