RN732BTTD3010D50 Equivalent & Substitute Parts

Part Overview

The RN732BTTD3010D50 is a 301 Ohm thin film chip resistor manufactured by KOA Speer Electronics, Inc., rated at 0.125W (1/8W) in a 1206 (3216 Metric) surface mount package. This component features ±0.5% tolerance, moisture resistance, and operates across the temperature range of -55°C to 155°C. The part is currently listed as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity.

Substiute Parts

RN732BTTD3010D50

KOA Speer Electronics, Inc.In Stock: 870RN732BTTD3010D50 Datasheet

Current PartRFQ

RN73R2BTTD3010D50

KOA Speer Electronics, Inc.In Stock: 1078RN73R2BTTD3010D50 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RN732BTTD3010D50 is determined by strict equivalence in the following parameters:

Critical Parameters for Substitution:

• Resistance value: 301 Ohms (exact match required)
• Tolerance: ±0.5% (exact match required)
• Package: 1206 (3216 Metric) (exact match required)
• Composition: Thin Film (exact match required)
• Temperature Coefficient: ±50ppm/°C (exact match required)
• Operating Temperature Range: -55°C to 155°C (exact match required)

Allowable Variation:

• Power rating may be equal to or greater than the original specification (0.125W minimum)
• Additional certifications or features (such as AEC-Q200 automotive qualification) do not disqualify a substitute

The substitute part RN73R2BTTD3010D50 meets all critical parameters while offering an increased power rating of 0.25W (1/4W) and automotive AEC-Q200 qualification, making it a valid direct substitute.

Parameter Comparison

Engineering Selection Recommendations

The RN73R2BTTD3010D50 is a direct functional substitute for the obsolete RN732BTTD3010D50. Both components share identical electrical specifications (301 Ohms, ±0.5% tolerance, ±50ppm/°C temperature coefficient) and mechanical compatibility (1206 package, identical dimensions and termination count).

The substitute part offers the following advantages:

• Active Product Status: The RN73R2BTTD3010D50 is currently in active production, ensuring long-term availability and supply chain continuity.
• Higher Power Rating: The increased power rating of 0.25W (1/4W) versus 0.125W (1/8W) provides additional thermal margin in circuit applications without affecting electrical performance.
• Automotive Qualification: AEC-Q200 certification on the substitute part extends its applicability to automotive and high-reliability applications.
• Regulatory Compliance: Both parts maintain ROHS3 compliance and MSL 1 rating, with identical environmental and regulatory status.

Direct substitution is permissible in all applications where the original RN732BTTD3010D50 was specified, provided the circuit design accommodates the higher power rating of the substitute.

Frequently Asked Questions (FAQ)

Q: Can the RN73R2BTTD3010D50 be used as a direct replacement for the RN732BTTD3010D50?

A: Yes. Both parts share identical resistance value (301 Ohms), tolerance (±0.5%), package (1206), composition (thin film), and operating temperature range (-55°C to 155°C). The substitute is electrically and mechanically compatible.

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

A: The original RN732BTTD3010D50 is rated at 0.125W (1/8W), while the substitute RN73R2BTTD3010D50 is rated at 0.25W (1/4W). The higher power rating of the substitute does not affect circuit operation and provides additional thermal capacity.

Q: Are the physical dimensions identical?

A: Yes. Both parts use the 1206 (3216 Metric) package with identical dimensions: 0.126" L x 0.063" W (3.20mm x 1.60mm) and maximum seated height of 0.028" (0.70mm). PCB footprints are interchangeable.

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

A: No. AEC-Q200 is an automotive qualification standard that represents an additional certification level. Its presence on the substitute part does not create incompatibility; it only extends the part's qualified application scope.

Q: Are moisture sensitivity levels the same?

A: Yes. Both parts carry MSL 1 (Unlimited) rating, indicating identical moisture sensitivity characteristics and storage requirements.

Q: What is the reason for the original part's obsolescence?

A: The RN732BTTD3010D50 is listed as obsolete by the manufacturer. The RN73R2BTTD3010D50 represents the active product line continuation with equivalent electrical performance and enhanced specifications.