RN732ATTD3973D25 Equivalent & Substitute Parts

Part Overview

The RN732ATTD3973D25 is a 397 kOhms ±0.5% thin film chip resistor manufactured by KOA Speer Electronics, Inc. in 0805 (2012 Metric) package format with 0.1W power rating. This component is classified as obsolete product status, necessitating identification of equivalent and substitute parts for ongoing design requirements and procurement needs. The part features moisture-resistant construction, ROHS3 compliance, and unlimited moisture sensitivity level (MSL 1).

Substiute Parts

RN732ATTD3973D25

KOA Speer Electronics, Inc.In Stock: 1128RN732ATTD3973D25 Datasheet

Current PartRFQ

RN73R2ATTD3973D25

KOA Speer Electronics, Inc.In Stock: 1003RN73R2ATTD3973D25 Datasheet

DirectRFQ

PHP00805E3973BBT1

Vishay Dale Thin FilmIn Stock: 1034PHP00805E3973BBT1 Datasheet

UpgradeRFQ

RT0805BRD07397KL

YAGEOIn Stock: 1024RT0805BRD07397KL Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RN732ATTD3973D25 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 397 kOhms (exact match required)
• Package / Case: 0805 (2012 Metric) (physical and electrical compatibility)
• Temperature Coefficient: ±25ppm/°C (thermal stability requirement)
• Operating Temperature Range: -55°C ~ 155°C (environmental compatibility)
• Composition: Thin Film (electrical performance characteristics)

Allowable Variation Parameters:

• Tolerance: ±0.5% or tighter (±0.1% acceptable as upgrade)
• Power Rating: 0.1W or higher (0.125W, 0.63W acceptable as upgrades)
• Moisture Resistance: Required feature maintained across all substitutes
• RoHS Status: ROHS3 Compliant preferred; non-compliant parts noted

Three substitute parts meet these criteria with varying upgrade characteristics in tolerance and power rating specifications.

Parameter Comparison

Engineering Selection Recommendations

RN73R2ATTD3973D25 (Direct Substitute - KOA Speer Electronics)

This part represents the direct equivalent from the same manufacturer series. It maintains identical resistance, tolerance, and temperature characteristics while offering increased power rating (0.125W vs. 0.1W) and automotive AEC-Q200 qualification. Product status is active with ROHS3 compliance. This substitute is suitable for direct replacement in applications where the original part is no longer available, with the added benefit of enhanced thermal capability and automotive-grade reliability.

RT0805BRD07397KL (Upgrade Substitute - YAGEO)

This YAGEO part provides improved tolerance specification (±0.1% vs. ±0.5%) while maintaining equivalent power rating (0.125W) and all critical electrical parameters. ROHS3 compliance is maintained. Selection of this part is appropriate when tighter tolerance requirements exist or when YAGEO component qualification is required by design or procurement specifications.

PHP00805E3973BBT1 (Upgrade Substitute - Vishay Dale Thin Film)

This Vishay part offers the highest power rating (0.63W) and tightest tolerance (±0.1%) among available substitutes. Additional features include flame-proof and safety certifications. However, this part is RoHS non-compliant. Selection is limited to applications where RoHS compliance is not mandated and where enhanced power dissipation capability or safety certifications are required.

Frequently Asked Questions (FAQ)

Q: Can RN73R2ATTD3973D25 be used as a direct replacement for RN732ATTD3973D25?

A: Yes. Both parts share identical resistance value (397 kOhms), tolerance (±0.5%), package (0805), temperature coefficient (±25ppm/°C), and operating temperature range (-55°C ~ 155°C). The substitute offers higher power rating (0.125W vs. 0.1W) and active product status, making it suitable for direct substitution.

Q: What is the difference between the tolerance specifications of the substitute parts?

A: The main part and RN73R2ATTD3973D25 specify ±0.5% tolerance. RT0805BRD07397KL and PHP00805E3973BBT1 specify ±0.1% tolerance. Tighter tolerance (±0.1%) provides improved accuracy and is acceptable as an upgrade for applications requiring higher precision.

Q: Are all substitute parts available in the same package format?

A: Yes. All substitute parts use the 0805 (2012 Metric) package format, ensuring physical and electrical compatibility with the original design. Dimensional variations are minimal and within standard PCB footprint tolerances.

Q: Why is PHP00805E3973BBT1 marked as RoHS non-compliant?

A: The PHP00805E3973BBT1 does not meet ROHS3 compliance requirements. Selection of this part is restricted to applications where RoHS compliance is not a regulatory or design requirement. Verify compliance obligations before selecting this substitute.

Q: What is the significance of AEC-Q200 qualification on RN73R2ATTD3973D25?

A: AEC-Q200 is an automotive industry qualification standard. This certification indicates the part meets automotive reliability and quality standards. Selection of this part is appropriate for automotive applications or when automotive-grade component qualification is specified.

Q: Can these parts be used interchangeably in high-precision measurement circuits?

A: Tolerance specification determines suitability for precision applications. The main part and RN73R2ATTD3973D25 (±0.5% tolerance) are suitable for general-purpose applications. RT0805BRD07397KL and PHP00805E3973BBT1 (±0.1% tolerance) are preferred for high-precision measurement circuits requiring tighter accuracy.

Q: What is the MSL rating and why is it relevant?

A: All parts carry MSL 1 (Unlimited) rating, indicating unlimited shelf life without moisture absorption concerns. This specification is relevant for storage, handling, and assembly processes, ensuring no special moisture control measures are required.