RN732ATTD3901A05 Equivalent & Substitute Parts

Part Overview

The RN732ATTD3901A05 is a 3.9 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 RN732ATTD3901A05 carries an Obsolete product status. Locating equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs, repairs, and system upgrades.

Substiute Parts

RN732ATTD3901A05

KOA Speer Electronics, Inc.In Stock: 787RN732ATTD3901A05 Datasheet

Current PartRFQ

RN73R2ATTD3901A05

KOA Speer Electronics, Inc.In Stock: 1001RN73R2ATTD3901A05 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RN732ATTD3901A05 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 3.9 kOhms
• Tolerance: ±0.05%
• Package / Case: 0805 (2012 Metric)
• Composition: Thin Film
• Temperature Coefficient: ±5ppm/°C
• Operating Temperature Range: -55°C ~ 155°C
• Number of Terminations: 2
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Allowable Variation Parameters:

• Power Rating: May be equal to or greater than 0.1W
• Packaging Format: May differ (Tape & Reel acceptable as alternative to standard packaging)
• Product Status: Active status preferred over Obsolete
• Additional Certifications: Automotive AEC-Q200 qualification is permissible as enhancement

The RN73R2ATTD3901A05 qualifies as a direct substitute based on matching all mandatory parameters while offering increased power rating (0.125W vs 0.1W) and active product status with automotive qualification.

Parameter Comparison

Engineering Selection Recommendations

The RN73R2ATTD3901A05 is the qualified substitute for the obsolete RN732ATTD3901A05. Selection is based on the following engineering criteria:

Compliance & Regulatory Status: Both parts maintain ROHS3 compliance and REACH Unaffected status, ensuring regulatory alignment for current manufacturing standards.

Product Lifecycle: The RN73R2ATTD3901A05 carries Active product status, providing long-term availability and supply chain stability compared to the Obsolete RN732ATTD3901A05.

Electrical & Mechanical Compatibility: All critical electrical parameters match exactly: 3.9 kOhms resistance, ±0.05% tolerance, ±5ppm/°C temperature coefficient, and -55°C to 155°C operating range. Physical dimensions and package format (0805 2012 Metric) are identical, ensuring direct PCB compatibility without layout modifications.

Power Rating Enhancement: The substitute provides 0.125W power rating versus the original 0.1W specification. This represents a 25% increase in power dissipation capability, which is permissible for substitution as it does not reduce component performance margins.

Automotive Qualification: The RN73R2ATTD3901A05 includes AEC-Q200 automotive qualification, providing additional reliability assurance beyond the original part specification.

Frequently Asked Questions (FAQ)

Q: Can the RN73R2ATTD3901A05 be used as a direct replacement for RN732ATTD3901A05 on existing PCBs?

A: Yes. Both parts share identical 0805 (2012 Metric) package dimensions (0.079" L x 1.25mm W, 0.024" max height), identical footprint requirements, and matching electrical specifications (3.9 kOhms ±0.05%, ±5ppm/°C). No PCB layout modifications are required.

Q: What is the significance of the higher power rating on the substitute part?

A: The RN73R2ATTD3901A05 is rated for 0.125W versus the original 0.1W. This increased power dissipation capability provides additional thermal margin and does not compromise circuit performance. The substitute remains suitable for applications designed for the original 0.1W specification.

Q: Are there packaging differences between these parts?

A: The RN732ATTD3901A05 uses standard packaging, while the RN73R2ATTD3901A05 is supplied in Tape & Reel (TR) format. Both formats contain identical components; packaging format affects only handling and assembly processes, not component performance or compatibility.

Q: Why is the substitute part listed as Active while the original is Obsolete?

A: The RN732ATTD3901A05 has reached end-of-life status and is no longer manufactured. The RN73R2ATTD3901A05 remains in active production, ensuring continued availability for new designs and replacement stock requirements.

Q: Does the AEC-Q200 automotive qualification on the substitute affect its use in non-automotive applications?

A: No. AEC-Q200 qualification represents an additional quality and reliability standard. Parts meeting automotive standards are fully compatible with general industrial and commercial applications.

Q: Are the tolerance and temperature coefficient specifications identical?

A: Yes. Both parts specify ±0.05% tolerance and ±5ppm/°C temperature coefficient, ensuring equivalent precision performance across the -55°C to 155°C operating range.