RN732ATTD4022D10 Equivalent & Substitute Parts

Part Overview

The RN732ATTD4022D10 is a 40.2 kOhms ±0.5% thin film chip resistor in 0805 (2012 Metric) package rated at 0.1W (1/10W) power dissipation. Manufactured by KOA Speer Electronics, Inc., 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 for ongoing design support and procurement continuity.

Substiute Parts

RN732ATTD4022D10

KOA Speer Electronics, Inc.In Stock: 1107RN732ATTD4022D10 Datasheet

Current PartRFQ

RN73R2ATTD4022D10

KOA Speer Electronics, Inc.In Stock: 822RN73R2ATTD4022D10 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RN732ATTD4022D10 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 40.2 kOhms
• Tolerance: ±0.5%
• Package / Case: 0805 (2012 Metric)
• Composition: Thin Film
• Temperature Coefficient: ±10ppm/°C
• Operating Temperature Range: -55°C ~ 155°C
• Number of Terminations: 2

Allowable Variation Parameters:

• Power Rating: Substitute parts may have equal or higher power dissipation ratings
• Product Status: Active status preferred for long-term availability
• Certifications and Features: Additional certifications (such as AEC-Q200) do not disqualify substitution

The RN73R2ATTD4022D10 qualifies as a direct substitute based on matching all mandatory parameters while offering enhanced power rating (0.125W vs. 0.1W) and active product status with automotive qualification.

Parameter Comparison

Engineering Selection Recommendations

The RN73R2ATTD4022D10 is the qualified substitute for the obsolete RN732ATTD4022D10. Selection rationale is based on the following engineering factors:

Product Status: The substitute part maintains active product status with KOA Speer Electronics, ensuring long-term availability and supply chain continuity. The main part's obsolete classification creates procurement risk.

Electrical Equivalence: Both parts share identical resistance value (40.2 kOhms), tolerance (±0.5%), temperature coefficient (±10ppm/°C), and operating temperature range (-55°C ~ 155°C). These parameters ensure functional interchangeability in circuit applications.

Power Rating Enhancement: The substitute provides 0.125W power rating compared to the main part's 0.1W rating. This represents a 25% increase in power dissipation capability, which is advantageous for thermal margin and component reliability without introducing any compatibility issues.

Compliance and Certifications: Both parts maintain ROHS3 compliance and MSL Level 1 rating. The substitute additionally carries AEC-Q200 automotive qualification, which does not restrict its use in non-automotive applications and provides enhanced quality assurance.

Physical Compatibility: Identical package dimensions (0805 / 2012 Metric) and form factor ensure direct PCB footprint compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can RN73R2ATTD4022D10 be used as a direct replacement for RN732ATTD4022D10 in existing designs?

A: Yes. The substitute part matches all critical electrical parameters (resistance, tolerance, temperature coefficient, operating range) and physical specifications (0805 package, dimensions). The higher power rating (0.125W vs. 0.1W) provides additional thermal margin without affecting circuit performance.

Q: What is the significance of the power rating difference between the two parts?

A: The RN73R2ATTD4022D10 has a 0.125W rating versus the RN732ATTD4022D10's 0.1W rating. In substitution, a higher power rating is acceptable and beneficial, as it indicates greater thermal capacity. This does not create compatibility issues and improves component reliability margins.

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

A: No. AEC-Q200 certification represents an additional quality standard and does not restrict component use in non-automotive circuits. The certification indicates enhanced reliability testing and quality assurance, which benefits all applications.

Q: Are the physical dimensions and PCB footprints 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). No PCB layout modifications are required.

Q: What is the inventory status for the substitute part?

A: The RN73R2ATTD4022D10 is currently in active production with 782 pieces available in stock as new original inventory. The main part (RN732ATTD4022D10) is obsolete with 1031 pieces remaining in stock.

Q: Are there any differences in moisture sensitivity or environmental ratings?

A: Both parts carry identical MSL Level 1 (Unlimited) ratings and moisture-resistant construction. Environmental performance characteristics are equivalent across the operating temperature range of -55°C to 155°C.