RN732ATTD1240F10 Equivalent & Substitute Parts

Part Overview

The RN732ATTD1240F10 is a 124 Ohms ±1% 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 moisture-resistant construction and operates across the temperature range of -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

RN732ATTD1240F10

KOA Speer Electronics, Inc.In Stock: 1040RN732ATTD1240F10 Datasheet

Current PartRFQ

RN73R2ATTD1240F10

KOA Speer Electronics, Inc.In Stock: 849RN73R2ATTD1240F10 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RN732ATTD1240F10 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 124 Ohms
• Tolerance: ±1%
• Package format: 0805 (2012 Metric)
• Composition: Thin Film
• Temperature coefficient: ±10ppm/°C
• Operating temperature range: -55°C ~ 155°C
• Moisture resistance capability
• RoHS3 compliance

Allowable Variation:

• Power rating may be equal to or greater than the original 0.1W specification, provided the physical dimensions and thermal characteristics remain compatible with the 0805 package footprint.

The identified substitute RN73R2ATTD1240F10 meets all mandatory parameters while providing an increased power rating of 0.125W (1/8W), maintaining full dimensional and electrical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The RN73R2ATTD1240F10 serves as a direct functional substitute for the obsolete RN732ATTD1240F10. Selection of this substitute is supported by the following engineering factors:

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

Electrical Equivalence: Both parts maintain identical resistance value (124 Ohms), tolerance (±1%), temperature coefficient (±10ppm/°C), and operating temperature range (-55°C ~ 155°C). These parameters ensure functional interchangeability in circuit applications.

Physical Compatibility: Identical 0805 (2012 Metric) package dimensions and height specifications confirm direct footprint compatibility on printed circuit boards without layout modifications.

Compliance Certifications: Both parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, maintaining regulatory and environmental standards.

Power Rating Enhancement: The substitute's increased power rating of 0.125W (1/8W) versus the original 0.1W (1/10W) provides additional thermal margin without compromising circuit performance or introducing incompatibility.

Automotive Qualification: The substitute part carries AEC-Q200 automotive qualification, providing enhanced reliability documentation for applications requiring automotive-grade components.

Frequently Asked Questions (FAQ)

Q: Can RN73R2ATTD1240F10 be used as a direct replacement for RN732ATTD1240F10 on existing circuit boards?

A: Yes. Both parts share identical 0805 (2012 Metric) package dimensions, footprint, and height specifications. No PCB layout modifications are required for substitution.

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

A: The substitute's 0.125W (1/8W) rating versus the original 0.1W (1/10W) represents increased thermal dissipation capability. This provides additional safety margin in applications operating near the original part's power limit. The higher rating does not negatively impact circuit performance.

Q: Are the electrical characteristics identical between the main part and substitute?

A: Yes. Both parts maintain 124 Ohms resistance, ±1% tolerance, ±10ppm/°C temperature coefficient, and -55°C ~ 155°C operating temperature range. Electrical performance is equivalent.

Q: Why is the main part classified as obsolete?

A: The RN732ATTD1240F10 is no longer in active production by KOA Speer Electronics, Inc. The RN73R2ATTD1240F10 represents the current active equivalent within the RN73 series product line.

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

A: No. AEC-Q200 qualification indicates enhanced automotive-grade reliability testing and documentation. This certification does not introduce incompatibility; it provides additional qualification documentation suitable for automotive and high-reliability applications.

Q: Are packaging options different between the two parts?

A: The main part is listed without specified packaging format. The substitute is supplied in Tape & Reel (TR) format, which is standard for automated assembly processes. Both parts are electrically and physically identical.

Q: What compliance standards apply to both parts?

A: Both parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 and HTSUS 8533.21.0030. Moisture sensitivity level is 1 (Unlimited) for both parts.