RN732ATTD3900D10 Equivalent & Substitute Parts

Part Overview

The RN732ATTD3900D10 is a 390 Ohms ±0.5% thin film chip resistor in 0805 (2012 Metric) package rated at 0.1W (1/10W) power dissipation. This component is manufactured by KOA Speer Electronics, Inc. and features moisture-resistant construction with a temperature coefficient of ±10ppm/°C and operating range of -55°C to 155°C.

The RN732ATTD3900D10 has reached obsolete product status. 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

RN732ATTD3900D10

KOA Speer Electronics, Inc.In Stock: 1173RN732ATTD3900D10 Datasheet

Current PartRFQ

RN73R2ATTD3900D10

KOA Speer Electronics, Inc.In Stock: 925RN73R2ATTD3900D10 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RN732ATTD3900D10 is based on strict equivalence of the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 390 Ohms
• Tolerance: ±0.5%
• Package / Case: 0805 (2012 Metric)
• Composition: Thin Film
• Temperature Coefficient: ±10ppm/°C
• Operating Temperature Range: -55°C to 155°C
• Moisture Resistant construction

Allowable Variation:

• Power rating may be equal to or greater than the original specification (0.1W minimum)
• Product status may transition from obsolete to active
• Packaging format may differ (bulk to Tape & Reel)
• Additional certifications or features may be present

The substitute part RN73R2ATTD3900D10 meets all mandatory matching parameters while providing enhanced power rating (0.125W vs. 0.1W) and automotive-grade qualification (AEC-Q200).

Parameter Comparison

Engineering Selection Recommendations

The RN73R2ATTD3900D10 is a direct functional substitute for the obsolete RN732ATTD3900D10. Both components share identical electrical specifications (390 Ohms, ±0.5% tolerance, ±10ppm/°C temperature coefficient) and mechanical compatibility (0805 package, 2.00mm x 1.25mm dimensions).

The substitute part provides the following advantages:

Active Product Status: RN73R2ATTD3900D10 maintains active manufacturing status, ensuring long-term availability and supply chain continuity compared to the obsolete RN732ATTD3900D10.

Enhanced Power Rating: The substitute's 0.125W rating exceeds the original 0.1W specification, providing additional thermal margin in applications without requiring circuit redesign.

Automotive Qualification: AEC-Q200 certification of the substitute part qualifies it for automotive applications, expanding potential use cases beyond the original component's scope.

Regulatory Compliance: Both components maintain ROHS3 compliance and unlimited moisture sensitivity level (MSL 1), ensuring compatibility with current manufacturing and environmental standards.

Packaging Flexibility: The substitute is available in Tape & Reel format, supporting automated assembly processes while maintaining identical electrical and mechanical performance.

Frequently Asked Questions (FAQ)

Q: Can RN73R2ATTD3900D10 directly replace RN732ATTD3900D10 in existing designs?

A: Yes. Both components share identical resistance (390 Ohms), tolerance (±0.5%), package (0805), composition (thin film), temperature coefficient (±10ppm/°C), and operating temperature range (-55°C to 155°C). The substitute's higher power rating (0.125W vs. 0.1W) does not create compatibility issues and provides additional thermal headroom.

Q: What is the significance of the power rating difference?

A: The substitute part's 0.125W rating is higher than the original 0.1W specification. In circuit applications, this means the substitute can safely dissipate more power without exceeding temperature limits. This difference does not affect electrical performance in circuits designed for the original 0.1W component.

Q: Does the AEC-Q200 automotive qualification affect non-automotive applications?

A: No. AEC-Q200 certification indicates the substitute meets automotive reliability and testing standards. This qualification does not restrict use in non-automotive applications and represents an enhancement to component quality and traceability.

Q: Are there packaging considerations when switching from RN732ATTD3900D10 to RN73R2ATTD3900D10?

A: The original part uses standard packaging while the substitute is supplied in Tape & Reel (TR) format. Both formats contain identical components. Tape & Reel packaging is optimized for automated assembly processes and does not affect component performance or board-level compatibility.

Q: What compliance certifications apply to both parts?

A: Both RN732ATTD3900D10 and RN73R2ATTD3900D10 are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Both maintain MSL 1 (unlimited moisture sensitivity level), indicating no special moisture handling requirements during storage or assembly.

Q: Why is the original part listed as obsolete?

A: Product obsolescence reflects manufacturing discontinuation by KOA Speer Electronics, Inc. The RN73R2ATTD3900D10 represents the active product line continuation with equivalent electrical specifications and enhanced features, ensuring design continuity and supply availability.