RN732ATTD4121D50 Equivalent & Substitute Parts

Part Overview

The RN732ATTD4121D50 is a 4.12 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 features moisture-resistant construction and operates across -55°C to 155°C temperature range. The part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and procurement needs.

Substiute Parts

RN732ATTD4121D50

KOA Speer Electronics, Inc.In Stock: 1091RN732ATTD4121D50 Datasheet

Current PartRFQ

RN73R2ATTD4121D50

KOA Speer Electronics, Inc.In Stock: 714RN73R2ATTD4121D50 Datasheet

DirectRFQ

TNPW08054K12BETA

Vishay DaleIn Stock: 960TNPW08054K12BETA Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RN732ATTD4121D50 is determined by strict adherence to the following parameters:

Critical Parameters (Must Match):

• Resistance value: 4.12 kOhms
• Package / Case: 0805 (2012 Metric)
• Composition: Thin Film
• Number of Terminations: 2

Allowable Variation Parameters:

• Tolerance: Equal to or tighter than ±0.5%
• Power Rating: Equal to or greater than 0.1W
• Temperature Coefficient: Equal to or better than ±50ppm/°C
• Operating Temperature Range: Must encompass or exceed -55°C ~ 155°C
• Moisture Resistance: Required feature

Substitute parts are grouped into two categories based on these criteria: direct equivalents with matching specifications and upgraded alternatives with enhanced performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

RN73R2ATTD4121D50 (Direct Equivalent): This part serves as the primary direct substitute for the obsolete RN732ATTD4121D50. It maintains identical resistance, tolerance, and temperature coefficient specifications while providing increased power rating (0.125W versus 0.1W). The component is active in production status and carries ROHS3 compliance certification. The addition of Automotive AEC-Q200 qualification provides enhanced reliability documentation suitable for demanding applications. This substitute is recommended for applications requiring direct functional replacement with improved availability and active manufacturing support.

TNPW08054K12BETA (Upgraded Alternative): This Vishay Dale component offers enhanced performance characteristics including tighter tolerance (±0.1% versus ±0.5%) and superior temperature coefficient (±25ppm/°C versus ±50ppm/°C). Power rating matches the direct equivalent at 0.125W. Military-grade construction provides additional performance assurance. However, this part carries RoHS non-compliance status and REACH-affected designation, requiring compliance verification against project requirements. Operating temperature range extends to 125°C maximum, which is 30°C lower than the main part specification. This substitute is suitable for applications prioritizing precision and stability where compliance restrictions do not apply.

Frequently Asked Questions (FAQ)

Q: Can RN73R2ATTD4121D50 directly replace RN732ATTD4121D50 in existing designs?

A: Yes. Both components share identical resistance (4.12 kOhms), tolerance (±0.5%), temperature coefficient (±50ppm/°C), and operating temperature range (-55°C ~ 155°C). The RN73R2ATTD4121D50 provides higher power rating (0.125W versus 0.1W), making it functionally compatible. Physical dimensions and package format (0805) are identical. Tape & Reel packaging of the substitute requires adjustment to procurement and assembly processes compared to bulk packaging of the original part.

Q: What are the key differences between the two substitute options?

A: RN73R2ATTD4121D50 maintains specification parity with the original part while offering active production status and automotive qualification. TNPW08054K12BETA provides superior tolerance and temperature stability but operates at reduced maximum temperature (125°C versus 155°C) and carries RoHS non-compliance status. Selection depends on application requirements for precision, temperature range, and regulatory compliance.

Q: Is the TNPW08054K12BETA suitable for applications requiring full -55°C ~ 155°C operation?

A: No. The TNPW08054K12BETA maximum operating temperature is 125°C, which does not satisfy the full temperature range of the original specification. Applications requiring operation above 125°C must use RN73R2ATTD4121D50 or identify alternative components with extended temperature ratings.

Q: What compliance considerations apply to each substitute?

A: RN73R2ATTD4121D50 is ROHS3 compliant and REACH unaffected, suitable for applications with environmental compliance requirements. TNPW08054K12BETA is RoHS non-compliant and REACH affected, requiring verification against project compliance mandates before selection.

Q: Are there packaging format differences between the main part and substitutes?

A: The main part RN732ATTD4121D50 is supplied in bulk packaging. Both substitutes (RN73R2ATTD4121D50 and TNPW08054K12BETA) are supplied in Tape & Reel format. This difference affects procurement, storage, and assembly line integration procedures but does not impact electrical or mechanical compatibility.