RN732ATTD4021F25 Equivalent & Substitute Parts

Part Overview

The RN732ATTD4021F25 is a 4.02 kOhms ±1% 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 with a temperature coefficient of ±25ppm/°C and operating range of -55°C to 155°C. The part is currently classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for production and repair applications.

Substiute Parts

RN732ATTD4021F25

KOA Speer Electronics, Inc.In Stock: 814RN732ATTD4021F25 Datasheet

Current PartRFQ

RN73R2ATTD4021F25

KOA Speer Electronics, Inc.In Stock: 872RN73R2ATTD4021F25 Datasheet

DirectRFQ

TNPW08054K02BETA

Vishay DaleIn Stock: 937TNPW08054K02BETA Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RN732ATTD4021F25 are qualified based on the following critical parameters:

Mandatory Compatibility Parameters:

• Resistance value: 4.02 kOhms (exact match required)
• Package type: 0805 (2012 Metric) (physical and electrical compatibility)
• Composition: Thin Film (electrical performance characteristics)
• Temperature coefficient: ±25ppm/°C (thermal stability)
• Operating temperature range: -55°C to 155°C minimum (environmental compatibility)

Allowable Variation Parameters:

• Tolerance: ±1% or tighter (±0.1% is acceptable as an upgrade)
• Power rating: Equal to or greater than 0.1W (0.125W is acceptable)
• Product status: Active preferred over obsolete (ensures ongoing availability)
• Certifications and compliance: May differ based on application requirements

Substitutes are grouped into two categories: direct equivalents (same tolerance and power rating) and upgrades (improved tolerance or power rating with identical core electrical parameters).

Parameter Comparison

Engineering Selection Recommendations

RN73R2ATTD4021F25 (Direct Equivalent - Recommended for Most Applications)

This part is the primary substitute for the obsolete RN732ATTD4021F25. It maintains identical electrical specifications (4.02 kOhms ±1%, ±25ppm/°C temperature coefficient, -55°C to 155°C operating range) while offering improved product status (Active). The RN73R2ATTD4021F25 features a higher power rating (0.125W vs. 0.1W), providing additional thermal margin. It carries AEC-Q200 automotive qualification and ROHS3 compliance, making it suitable for automotive and industrial applications. Physical dimensions are identical, ensuring direct PCB compatibility.

TNPW08054K02BETA (Upgrade - For Precision-Critical Applications)

This Vishay Dale component provides superior tolerance (±0.1% vs. ±1%), making it suitable for applications requiring tighter resistance accuracy. It maintains the same 4.02 kOhms value, ±25ppm/°C temperature coefficient, and 0805 package. The power rating is 0.125W, matching the direct equivalent. However, the operating temperature range is limited to -55°C to 125°C (versus 155°C maximum for the main part), and RoHS compliance status differs (non-compliant). This part is appropriate only when precision tolerance is a design requirement and the reduced upper temperature limit is acceptable.

Selection Criteria:

• Use RN73R2ATTD4021F25 for direct replacement in standard applications requiring active product status and ROHS3 compliance
• Use TNPW08054K02BETA only when ±0.1% tolerance is specified and the -55°C to 125°C temperature range is acceptable
• Verify compliance requirements (RoHS, REACH, automotive certifications) against design specifications before final selection

Frequently Asked Questions (FAQ)

Q: Can RN73R2ATTD4021F25 be used as a direct replacement for RN732ATTD4021F25?

A: Yes. Both parts have identical resistance value (4.02 kOhms), tolerance (±1%), composition (thin film), temperature coefficient (±25ppm/°C), and operating temperature range (-55°C to 155°C). The RN73R2ATTD4021F25 has a higher power rating (0.125W vs. 0.1W), which is compatible with the original design. Physical dimensions and package type (0805) are identical.

Q: What is the difference between the main part and RN73R2ATTD4021F25?

A: The primary differences are product status (Active vs. Obsolete), power rating (0.125W vs. 0.1W), and certifications (AEC-Q200 automotive qualification added). Electrical performance is equivalent. The RN73R2ATTD4021F25 is the recommended substitute due to active availability and improved specifications.

Q: When should TNPW08054K02BETA be used instead of RN73R2ATTD4021F25?

A: TNPW08054K02BETA should be selected only when design specifications explicitly require ±0.1% tolerance. The tighter tolerance comes at the cost of reduced maximum operating temperature (125°C vs. 155°C) and different compliance status (RoHS non-compliant). Verify that the lower temperature limit is acceptable for your application.

Q: Are all three parts physically compatible with the same PCB footprint?

A: Yes. All three parts use the 0805 (2012 Metric) package with identical length and width (0.079" x 0.049" / 2.00mm x 1.25mm). Height differences are minimal (0.024" for main and direct equivalent, 0.022" for upgrade), presenting no practical PCB assembly issues.

Q: What compliance certifications apply to each part?

A: RN732ATTD4021F25 and RN73R2ATTD4021F25 are ROHS3 compliant and REACH unaffected. RN73R2ATTD4021F25 additionally carries AEC-Q200 automotive qualification. TNPW08054K02BETA is RoHS non-compliant and REACH affected. Verify compliance requirements against your application and regulatory environment.

Q: Can the higher power rating of substitute parts affect circuit performance?

A: No. A higher power rating (0.125W vs. 0.1W) indicates greater thermal capacity and does not alter electrical performance. The resistance value, tolerance, and temperature coefficient remain identical. Higher power rating provides additional safety margin under thermal stress.

Q: What is the temperature coefficient significance for these parts?

A: All three parts have identical temperature coefficient (±25ppm/°C), meaning resistance value changes by approximately 0.0025% per degree Celsius. This specification is critical for precision analog circuits and temperature-sensitive applications. The coefficient is the same across all substitutes, ensuring equivalent thermal performance.