RN732ATTD12R3D50 Equivalent & Substitute Parts

Part Overview

The RN732ATTD12R3D50 is a 12.3 Ohm ±0.5% thin film chip resistor in 0805 (2012 Metric) package rated for 0.1W (1/10W) operation. Manufactured by KOA Speer Electronics, Inc., this component is classified as obsolete. Due to its discontinued status, identifying compatible substitute parts is essential for ongoing design support, production continuity, and component sourcing in applications where this resistor was originally specified.

Substiute Parts

RN732ATTD12R3D50

KOA Speer Electronics, Inc.In Stock: 1119RN732ATTD12R3D50 Datasheet

Current PartRFQ

RN73R2ATTD12R3D50

KOA Speer Electronics, Inc.In Stock: 866RN73R2ATTD12R3D50 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RN732ATTD12R3D50 is determined by the following critical parameters:

• Resistance Value: Must be 12.3 Ohms
• Tolerance: Must be ±0.5%
• Package / Case: Must be 0805 (2012 Metric)
• Composition: Must be Thin Film
• Temperature Coefficient: Must be ±50ppm/°C
• Operating Temperature Range: Must support -55°C ~ 155°C
• RoHS Compliance: Must maintain ROHS3 Compliant status

The substitute part RN73R2ATTD12R3D50 meets all these criteria. While it features a higher power rating (0.125W vs. 0.1W) and includes automotive AEC-Q200 qualification, these represent enhancements rather than deviations from the core electrical and mechanical specifications. The identical package, resistance value, tolerance, composition, and temperature characteristics ensure direct functional compatibility.

Parameter Comparison

Engineering Selection Recommendations

The RN73R2ATTD12R3D50 is a direct functional substitute for the obsolete RN732ATTD12R3D50. Both components share identical electrical specifications (12.3 Ohms, ±0.5% tolerance, ±50ppm/°C temperature coefficient) and mechanical compatibility (0805 package, identical dimensions and height).

The substitute part offers the advantage of active product status, ensuring long-term availability and supply chain continuity. The increased power rating (0.125W vs. 0.1W) provides additional thermal margin without affecting circuit performance in applications designed for the original 0.1W specification. Both parts maintain ROHS3 compliance and MSL 1 rating, meeting identical environmental and regulatory requirements.

The inclusion of AEC-Q200 automotive qualification in the substitute part represents an enhancement for applications requiring automotive-grade reliability, though this certification is not mandatory for non-automotive use cases.

Frequently Asked Questions (FAQ)

Q: Can RN73R2ATTD12R3D50 be used as a direct replacement for RN732ATTD12R3D50?

A: Yes. Both parts have identical resistance (12.3 Ohms), tolerance (±0.5%), package (0805), composition (thin film), temperature coefficient (±50ppm/°C), and operating temperature range (-55°C ~ 155°C). The substitute part's higher power rating (0.125W vs. 0.1W) is compatible with circuits designed for the original 0.1W specification.

Q: What is the difference between these two parts?

A: The primary differences are product status (substitute is active vs. obsolete main part), power rating (0.125W vs. 0.1W), and automotive qualification (AEC-Q200 in substitute). All core electrical and mechanical parameters are identical.

Q: Are the physical dimensions identical?

A: Yes. Both parts are 0805 (2012 Metric) package with identical dimensions of 0.079" L x 0.049" W (2.00mm x 1.25mm) and maximum seated height of 0.024" (0.60mm). They are mechanically interchangeable on PCBs.

Q: Do both parts meet the same compliance standards?

A: Yes. Both parts are ROHS3 compliant, have MSL 1 (Unlimited) moisture sensitivity level, and are REACH unaffected. The substitute part additionally carries AEC-Q200 automotive qualification.

Q: Which part should be selected for new designs?

A: The RN73R2ATTD12R3D50 should be selected for new designs due to its active product status, ensuring availability and supply chain support. It provides identical electrical performance with enhanced thermal capability and automotive-grade reliability.