Equivalent & Substitute Parts for RN732ATTD4021D25

Part Overview

The RN732ATTD4021D25 is a 4.02 kOhms ±0.5% 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 with a temperature coefficient of ±25ppm/°C and operates across -55°C to 155°C. The part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and procurement needs.

Substiute Parts

RN732ATTD4021D25

KOA Speer Electronics, Inc.In Stock: 719RN732ATTD4021D25 Datasheet

Current PartRFQ

RN73R2ATTD4021D25

KOA Speer Electronics, Inc.In Stock: 735RN73R2ATTD4021D25 Datasheet

DirectRFQ

TNPW08054K02BETA

Vishay DaleIn Stock: 937TNPW08054K02BETA Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RN732ATTD4021D25 is determined by the following critical parameters:

Primary Substitution Criteria:

• Resistance value: 4.02 kOhms (exact match required)
• Package format: 0805 (2012 Metric) (exact match required)
• Composition: Thin Film (exact match required)
• Temperature coefficient: ±25ppm/°C (exact match required)
• Operating temperature range: -55°C minimum and 155°C maximum (minimum requirement)

Secondary Substitution Criteria:

• Tolerance: ±0.5% or tighter (equal or better)
• Power rating: 0.1W or higher (equal or better)
• Moisture resistance: Required feature

Two substitute parts meet these criteria with varying performance characteristics:

Direct Substitute (Same Series): RN73R2ATTD4021D25 maintains identical electrical specifications while offering higher power rating (0.125W) and automotive qualification (AEC-Q200). Product status is active.

Upgrade Substitute (Enhanced Performance): TNPW08054K02BETA provides superior tolerance (±0.1% versus ±0.5%) and military-grade construction, with equivalent power rating (0.125W). Product status is active.

Parameter Comparison

Engineering Selection Recommendations

For RoHS3 Compliant Applications: Select RN73R2ATTD4021D25. This part maintains full electrical and thermal compatibility with the obsolete RN732ATTD4021D25 while offering active product status, higher power rating margin (0.125W versus 0.1W), and automotive-grade reliability certification (AEC-Q200). RoHS3 compliance is maintained.

For Military or High-Reliability Applications: Select TNPW08054K02BETA. This part provides superior tolerance specification (±0.1% versus ±0.5%), military-grade construction, and active product status. Note that operating temperature maximum is 125°C (versus 155°C for the main part) and RoHS compliance status is non-compliant. Verify compliance requirements before selection.

For Direct Replacement with Minimal Design Impact: RN73R2ATTD4021D25 is the preferred choice due to identical electrical specifications, same manufacturer series lineage, and active production status with improved reliability ratings.

Frequently Asked Questions (FAQ)

Q: Can RN73R2ATTD4021D25 directly replace RN732ATTD4021D25 in existing designs?

A: Yes. Both parts share identical resistance value (4.02 kOhms), tolerance (±0.5%), package format (0805), composition (thin film), and temperature coefficient (±25ppm/°C). The substitute offers higher power rating (0.125W versus 0.1W), which provides additional design margin. Physical dimensions and termination count are identical.

Q: What is the key difference between the direct substitute and upgrade substitute?

A: RN73R2ATTD4021D25 maintains the original tolerance specification (±0.5%) with automotive qualification. TNPW08054K02BETA provides tighter tolerance (±0.1%) and military-grade construction but operates to 125°C maximum instead of 155°C and is RoHS non-compliant.

Q: Are all three parts available in the same packaging format?

A: All three parts use 0805 (2012 Metric) package format with identical physical dimensions (0.079" L x 0.049" W). However, RN732ATTD4021D25 is supplied in bulk packaging, while both substitutes are supplied in Tape & Reel (TR) format. Verify packaging compatibility with assembly equipment.

Q: Which substitute should be selected for new designs?

A: RN73R2ATTD4021D25 is recommended for new designs requiring RoHS3 compliance and standard industrial/automotive applications. TNPW08054K02BETA is appropriate for military or high-precision applications where ±0.1% tolerance is specified, provided RoHS non-compliance is acceptable.

Q: Is the operating temperature range difference significant?

A: The main part and RN73R2ATTD4021D25 both operate to 155°C. TNPW08054K02BETA operates to 125°C maximum. If the design requires operation above 125°C, TNPW08054K02BETA is not suitable. Verify application temperature requirements before selection.