RN732ATTD3971A10 Equivalent & Substitute Parts

Part Overview

The RN732ATTD3971A10 is a 3.97 kOhms ±0.05% thin film chip resistor manufactured by KOA Speer Electronics, Inc. in 0805 (2012 Metric) package format with 0.1W power rating. This component features moisture-resistant construction and operates across -55°C to 155°C temperature range. The part is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing design requirements and procurement continuity.

Substiute Parts

RN732ATTD3971A10

KOA Speer Electronics, Inc.In Stock: 868RN732ATTD3971A10 Datasheet

Current PartRFQ

RN73R2ATTD3971A10

KOA Speer Electronics, Inc.In Stock: 745RN73R2ATTD3971A10 Datasheet

DirectRFQ

PLTT0805Z3971AGT5

Vishay Dale Thin FilmIn Stock: 982PLTT0805Z3971AGT5 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RN732ATTD3971A10 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 3.97 kOhms
• Tolerance: ±0.05%
• Package format: 0805 (2012 Metric)
• Composition: Thin Film
• Moisture resistance capability

Allowable Variation Parameters:

• Power rating: Equal to or greater than 0.1W
• Temperature coefficient: Equal to or lower absolute value
• Operating temperature range: Equal to or exceeding -55°C ~ 155°C
• Product status: Active preferred for obsolete parts

Two substitute parts meet these criteria with enhanced specifications suitable for direct replacement in circuit designs originally specified for RN732ATTD3971A10.

Parameter Comparison

Engineering Selection Recommendations

RN73R2ATTD3971A10 (Direct Equivalent): This part represents the primary direct substitute for RN732ATTD3971A10. It maintains identical electrical specifications (3.97 kOhms, ±0.05% tolerance, ±10ppm/°C temperature coefficient) while offering increased power rating (0.125W versus 0.1W) and active product status. The component includes automotive AEC-Q200 qualification, providing enhanced reliability documentation. Identical package dimensions and thermal operating range (-55°C ~ 155°C) ensure mechanical and thermal compatibility. ROHS3 compliance and MSL 1 rating match the original specification. This substitute is suitable for direct PCB layout replacement without design modification.

PLTT0805Z3971AGT5 (Upgrade Substitute): This Vishay Dale component provides enhanced performance characteristics while maintaining core electrical compatibility. Superior temperature coefficient (±5ppm/°C versus ±10ppm/°C) and extended operating temperature range (-55°C ~ 215°C) support applications requiring higher thermal stability. Doubled power rating (0.25W) provides additional thermal margin in power-dissipation-sensitive circuits. Enhanced feature set includes anti-corrosive and flame-proof properties beyond moisture resistance. ROHS3 compliance and MSL 1 rating ensure regulatory alignment. Slightly increased physical dimensions (0.080" L x 0.050" W versus 0.079" L x 0.049" W) and height (0.033" versus 0.024") require PCB layout verification for space-constrained applications.

Frequently Asked Questions (FAQ)

Q: Can RN73R2ATTD3971A10 be used as a direct replacement for RN732ATTD3971A10?

A: Yes. Both components share identical resistance (3.97 kOhms), tolerance (±0.05%), temperature coefficient (±10ppm/°C), operating temperature range (-55°C ~ 155°C), and 0805 package format. The substitute offers higher power rating (0.125W versus 0.1W), which provides additional thermal margin. No circuit redesign is required.

Q: What are the key differences between RN73R2ATTD3971A10 and PLTT0805Z3971AGT5?

A: Both maintain identical resistance and tolerance specifications. Primary differences include: manufacturer (KOA Speer versus Vishay Dale), power rating (0.125W versus 0.25W), temperature coefficient (±10ppm/°C versus ±5ppm/°C), maximum operating temperature (155°C versus 215°C), and physical dimensions. PLTT0805Z3971AGT5 provides superior thermal stability and extended temperature range.

Q: Are there package compatibility concerns when substituting these parts?

A: All three components use 0805 (2012 Metric) package format with identical footprints. RN732ATTD3971A10 and RN73R2ATTD3971A10 have identical dimensions (0.079" L x 0.049" W, 0.024" max height). PLTT0805Z3971AGT5 has marginally larger dimensions (0.080" L x 0.050" W, 0.033" max height). Verify PCB layout clearances for space-constrained designs before selecting the Vishay component.

Q: Do all substitute parts meet RoHS and environmental compliance requirements?

A: Yes. RN73R2ATTD3971A10 and PLTT0805Z3971AGT5 are both ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original RN732ATTD3971A10 specification. Both are REACH Unaffected and classified as EAR99 for export control purposes.

Q: Which substitute should be selected for new designs?

A: For designs requiring direct electrical equivalence with minimal risk, RN73R2ATTD3971A10 is recommended due to active product status and automotive AEC-Q200 qualification. For applications requiring enhanced thermal performance or extended temperature operation, PLTT0805Z3971AGT5 provides superior specifications. Verify physical dimensions against PCB layout constraints before final selection.