RN732ATTD1230C50 Equivalent & Substitute Parts

Part Overview

The RN732ATTD1230C50 is a 123 Ohm thin film chip resistor manufactured by KOA Speer Electronics, Inc., rated at 0.1W (1/10W) in 0805 (2012 Metric) package format. This component features ±0.25% tolerance, moisture resistance, and operates across -55°C to 155°C. The part is currently classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity.

Substiute Parts

RN732ATTD1230C50

KOA Speer Electronics, Inc.In Stock: 891RN732ATTD1230C50 Datasheet

Current PartRFQ

RN73R2ATTD1230C50

KOA Speer Electronics, Inc.In Stock: 1071RN73R2ATTD1230C50 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RN732ATTD1230C50 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 123 Ohms
• Tolerance: ±0.25%
• Package format: 0805 (2012 Metric)
• Composition: Thin Film
• Temperature coefficient: ±50ppm/°C
• Operating temperature range: -55°C ~ 155°C
• Moisture resistance capability
• RoHS3 compliance

Allowable Variation:

• Power rating may be equal or higher than the original 0.1W specification
• Product status may transition from obsolete to active
• Additional certifications (such as AEC-Q200) may be present without affecting substitution validity

The RN73R2ATTD1230C50 meets all mandatory matching parameters and qualifies as a direct substitute with enhanced power rating (0.125W) and automotive qualification.

Parameter Comparison

Engineering Selection Recommendations

The RN73R2ATTD1230C50 is the direct substitute for the obsolete RN732ATTD1230C50. Selection is based on the following engineering criteria:

Product Status Transition: The substitute part maintains active product status with KOA Speer Electronics, ensuring long-term availability and supply chain continuity compared to the obsolete original part.

Electrical Equivalence: Both parts maintain identical resistance (123 Ohms), tolerance (±0.25%), temperature coefficient (±50ppm/°C), and operating temperature range (-55°C ~ 155°C). The substitute's higher power rating (0.125W versus 0.1W) provides additional thermal margin without affecting circuit performance.

Compliance & Certifications: Both parts are ROHS3 compliant and REACH unaffected. The substitute includes AEC-Q200 automotive qualification, which does not restrict its use in non-automotive applications and indicates enhanced reliability screening.

Physical Compatibility: Identical package dimensions (0805 / 2012 Metric), footprint, and termination count ensure direct PCB-level substitution without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the RN73R2ATTD1230C50 replace the RN732ATTD1230C50 in existing designs?

A: Yes. The substitute part is electrically and mechanically equivalent across all critical parameters. Identical resistance, tolerance, temperature coefficient, operating range, and package format ensure functional compatibility. The higher power rating (0.125W) provides additional thermal headroom.

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

A: The RN73R2ATTD1230C50 is rated at 0.125W compared to the original 0.1W. This represents a 25% increase in power dissipation capability. In applications where the original part operated at or near its power limit, the substitute provides improved thermal performance and reliability margin. For applications well below the original 0.1W specification, the higher rating has no negative impact.

Q: Are there any differences in moisture resistance between the two parts?

A: Both parts feature moisture resistance and carry identical Moisture Sensitivity Level (MSL) rating of 1 (Unlimited). No functional difference exists in moisture handling capability.

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

A: No. AEC-Q200 is an automotive qualification standard that indicates enhanced reliability and screening. Its presence on the substitute part does not restrict use in non-automotive circuits and represents an additional quality assurance measure.

Q: Are the physical dimensions identical?

A: Yes. Both parts use the 0805 (2012 Metric) package with identical dimensions: 0.079" L x 0.049" W (2.00mm x 1.25mm) and maximum seated height of 0.024" (0.60mm). Direct PCB footprint compatibility is confirmed.

Q: What is the availability difference between these parts?

A: The RN732ATTD1230C50 is classified as obsolete, indicating discontinued production and limited remaining inventory. The RN73R2ATTD1230C50 maintains active product status with KOA Speer Electronics, ensuring reliable long-term procurement and supply chain support.