RN732ATTD1981C50 Equivalent & Substitute Parts

Part Overview

The RN732ATTD1981C50 is a 1.98 kOhms ±0.25% thin film chip resistor manufactured by KOA Speer Electronics, Inc. in 0805 (2012 Metric) package format. This component is rated for 0.1W (1/10W) power dissipation with moisture-resistant construction and operates across -55°C to 155°C temperature range.

The RN732ATTD1981C50 carries an Obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this component.

Substiute Parts

RN732ATTD1981C50

KOA Speer Electronics, Inc.In Stock: 720RN732ATTD1981C50 Datasheet

Current PartRFQ

RN73R2ATTD1981C50

KOA Speer Electronics, Inc.In Stock: 801RN73R2ATTD1981C50 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RN732ATTD1981C50 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 1.98 kOhms
• Tolerance: ±0.25%
• Package / Case: 0805 (2012 Metric)
• Composition: Thin Film
• Temperature Coefficient: ±50ppm/°C
• Operating Temperature Range: -55°C ~ 155°C
• Moisture Resistant construction

Allowable Variation Parameters:

• Power Rating: Equal or greater than 0.1W
• Product Status: Active or Obsolete (both acceptable for substitution)
• Certifications and compliance ratings: May differ based on application requirements

The RN73R2ATTD1981C50 qualifies as a direct substitute because it maintains identical resistance, tolerance, package, composition, temperature coefficient, and operating temperature specifications. The power rating increase from 0.1W to 0.125W (1/8W) represents an upward-compatible change. The addition of AEC-Q200 automotive qualification in the substitute part provides enhanced reliability without compromising compatibility.

Parameter Comparison

Engineering Selection Recommendations

The RN73R2ATTD1981C50 is a suitable substitute for the obsolete RN732ATTD1981C50 based on the following engineering criteria:

Electrical Compatibility: Both parts maintain identical resistance (1.98 kOhms), tolerance (±0.25%), temperature coefficient (±50ppm/°C), and operating temperature range (-55°C ~ 155°C). The substitute's increased power rating (0.125W versus 0.1W) provides additional thermal margin without affecting circuit performance.

Physical Compatibility: Both components share identical 0805 (2012 Metric) package dimensions and footprint specifications, enabling direct board-level substitution without layout modifications.

Compliance and Certifications: Both parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. The substitute part includes AEC-Q200 automotive qualification, which enhances reliability for applications requiring automotive-grade components.

Supply Chain Status: The substitute part carries Active product status with 730 units in stock, compared to the Obsolete status of the main part with 665 units available. Selection of the active substitute ensures long-term availability and supply continuity.

Frequently Asked Questions (FAQ)

Q: Can the RN73R2ATTD1981C50 be used as a direct replacement for the RN732ATTD1981C50 on existing PCBs?

A: Yes. Both components share identical 0805 (2012 Metric) package dimensions, footprint, and electrical specifications (1.98 kOhms ±0.25%, ±50ppm/°C, -55°C ~ 155°C). No PCB modifications are required.

Q: What is the significance of the power rating difference (0.1W versus 0.125W)?

A: The substitute part's higher power rating (0.125W) is an upward-compatible change. It indicates greater thermal dissipation capability without affecting nominal circuit operation. This provides additional safety margin in applications approaching the original part's power limits.

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

A: No. AEC-Q200 qualification represents an additional quality and reliability standard. Its presence on the substitute part does not restrict use in non-automotive applications and may provide enhanced reliability benefits.

Q: Are the physical dimensions and height specifications identical between both parts?

A: Yes. Both the RN732ATTD1981C50 and RN73R2ATTD1981C50 measure 0.079" L x 0.049" W (2.00mm x 1.25mm) with maximum seated height of 0.024" (0.60mm). They are mechanically interchangeable.

Q: What is the difference between the RN73 and RN73R series designations?

A: The RN73R series incorporates AEC-Q200 automotive qualification and represents an active product line, while the RN73 series (including the RN732A base product) is obsolete. Both series maintain identical electrical and physical specifications for the 1.98 kOhms ±0.25% 0805 package variant.

Q: Are both parts compliant with RoHS and REACH regulations?

A: Yes. Both the RN732ATTD1981C50 and RN73R2ATTD1981C50 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.