RN732ATTD3970C50 Equivalent & Substitute Parts

Part Overview

The RN732ATTD3970C50 is a 397 Ohms ±0.25% 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 RN732ATTD3970C50 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this resistor specification.

Substiute Parts

RN732ATTD3970C50

KOA Speer Electronics, Inc.In Stock: 986RN732ATTD3970C50 Datasheet

Current PartRFQ

RN73R2ATTD3970C50

KOA Speer Electronics, Inc.In Stock: 731RN73R2ATTD3970C50 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RN732ATTD3970C50 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 397 Ohms
• Tolerance: ±0.25%
• Package / Case: 0805 (2012 Metric)
• Composition: Thin Film
• Temperature Coefficient: ±50ppm/°C
• Operating Temperature Range: -55°C ~ 155°C
• Moisture Resistant feature

Allowable Variation:

• Power rating may be equal or greater than 0.1W
• Packaging format may differ (e.g., Tape & Reel vs. bulk)
• Product status may transition from obsolete to active
• Additional certifications (e.g., AEC-Q200) are permissible

The RN73R2ATTD3970C50 meets all mandatory matching parameters while offering increased power rating (0.125W) and automotive qualification (AEC-Q200), making it a valid substitute.

Parameter Comparison

Engineering Selection Recommendations

The RN73R2ATTD3970C50 is a direct substitute for the obsolete RN732ATTD3970C50. Both components share identical electrical specifications (397 Ohms, ±0.25% tolerance, ±50ppm/°C temperature coefficient) and mechanical compatibility (0805 package, identical dimensions).

The substitute part offers two advantages:

1. Active Product Status: The RN73R2ATTD3970C50 is currently in active production, ensuring long-term supply chain availability compared to the obsolete main part.

2. Enhanced Power Rating: The substitute provides 0.125W (1/8W) power rating versus 0.1W (1/10W) in the main part. This higher rating provides additional thermal margin without affecting circuit performance in applications designed for the original 0.1W specification.

3. Automotive Qualification: The RN73R2ATTD3970C50 carries AEC-Q200 certification, meeting automotive industry reliability standards. This certification is beneficial for applications requiring automotive-grade components.

Both parts maintain ROHS3 compliance, unlimited moisture sensitivity level (MSL 1), and REACH unaffected status. Physical footprint and mounting characteristics are identical, enabling direct PCB layout compatibility.

Frequently Asked Questions (FAQ)

Q: Can the RN73R2ATTD3970C50 be used as a direct replacement for the RN732ATTD3970C50?

A: Yes. Both components share identical resistance value (397 Ohms), tolerance (±0.25%), temperature coefficient (±50ppm/°C), operating temperature range (-55°C ~ 155°C), package format (0805), and physical dimensions. The substitute is electrically and mechanically compatible.

Q: What is the difference in power rating between these parts?

A: The main part (RN732ATTD3970C50) is rated at 0.1W (1/10W), while the substitute (RN73R2ATTD3970C50) is rated at 0.125W (1/8W). The higher power rating of the substitute provides additional thermal dissipation capability and does not affect compatibility with circuits designed for the original 0.1W specification.

Q: Does the AEC-Q200 certification on the substitute part affect compatibility?

A: No. AEC-Q200 certification indicates the substitute meets automotive industry reliability and qualification standards. This is an additional qualification that does not alter electrical or mechanical performance. Components with AEC-Q200 certification are suitable for both automotive and general industrial applications.

Q: Are the physical dimensions identical?

A: Yes. Both parts measure 0.079" L x 0.049" W (2.00mm x 1.25mm) with maximum seated height of 0.024" (0.60mm). PCB footprints and mounting requirements are identical.

Q: What is the packaging difference?

A: The main part (RN732ATTD3970C50) is supplied in standard packaging, while the substitute (RN73R2ATTD3970C50) is supplied in Tape & Reel (TR) format. Both formats contain identical components; packaging format does not affect component performance or compatibility.

Q: Are both parts RoHS compliant?

A: Yes. Both the RN732ATTD3970C50 and RN73R2ATTD3970C50 are ROHS3 compliant and REACH unaffected, meeting environmental regulatory requirements.