RN732ATTD3972F100 Equivalent & Substitute Parts

Part Overview

The RN732ATTD3972F100 is a 39.7 kOhms ±1% 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 the temperature range of -55°C to 155°C.

The RN732ATTD3972F100 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 resistance value and package specification.

Substiute Parts

RN732ATTD3972F100

KOA Speer Electronics, Inc.In Stock: 1191RN732ATTD3972F100 Datasheet

Current PartRFQ

RN73R2ATTD3972F100

KOA Speer Electronics, Inc.In Stock: 1078RN73R2ATTD3972F100 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RN732ATTD3972F100 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 39.7 kOhms
• Tolerance: ±1%
• Package / Case: 0805 (2012 Metric)
• Composition: Thin Film
• Temperature Coefficient: ±100ppm/°C
• Operating Temperature Range: -55°C ~ 155°C
• Moisture Resistant feature

Allowable Variation:

• Power rating may be equal to or greater than 0.1W, provided the physical dimensions remain compatible with the 0805 package specification
• Product status may differ (active vs. obsolete)
• Packaging format may vary (bulk vs. Tape & Reel)
• Additional certifications (such as AEC-Q200) do not disqualify a part from substitution

The RN73R2ATTD3972F100 meets all mandatory matching parameters and qualifies as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

The RN73R2ATTD3972F100 is a direct functional equivalent to the RN732ATTD3972F100 and is suitable for substitution in applications requiring 39.7 kOhms ±1% thin film resistors in 0805 package format.

Substitution Advantages:

• Active product status ensures ongoing availability and supply chain continuity
• Increased power rating (0.125W vs. 0.1W) provides additional thermal margin without dimensional changes
• Automotive AEC-Q200 certification indicates enhanced reliability qualification
• Identical physical dimensions and electrical parameters ensure direct board-level compatibility
• ROHS3 compliance and REACH unaffected status maintained

Compliance Verification: Both parts maintain ROHS3 compliance, REACH unaffected status, and MSL 1 (Unlimited) moisture sensitivity rating. No additional qualification or testing is required based on regulatory or environmental compliance criteria.

Frequently Asked Questions (FAQ)

Q: Can the RN73R2ATTD3972F100 be used as a direct replacement for the RN732ATTD3972F100?

A: Yes. The RN73R2ATTD3972F100 meets all mandatory electrical and mechanical parameters. Both parts share identical resistance value (39.7 kOhms), tolerance (±1%), package (0805), composition (thin film), temperature coefficient (±100ppm/°C), and operating temperature range (-55°C ~ 155°C). Physical dimensions are identical.

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

A: The RN732ATTD3972F100 is rated at 0.1W (1/10W), while the RN73R2ATTD3972F100 is rated at 0.125W (1/8W). The higher power rating of the substitute part provides additional thermal dissipation capability without affecting physical size or electrical characteristics.

Q: Are there packaging differences between these parts?

A: The RN732ATTD3972F100 is supplied in standard packaging, while the RN73R2ATTD3972F100 is supplied in Tape & Reel (TR) format. Both use identical 0805 (2012 Metric) package specifications and are compatible with automated assembly equipment.

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

A: No. AEC-Q200 certification indicates automotive-grade reliability qualification and does not introduce incompatibility. The substitute part meets or exceeds the specifications of the original part.

Q: Are both parts RoHS compliant?

A: Yes. Both the RN732ATTD3972F100 and RN73R2ATTD3972F100 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the moisture sensitivity level for these resistors?

A: Both parts have Moisture Sensitivity Level (MSL) 1, indicating unlimited shelf life without moisture control requirements during storage and handling.