RN731JTTD1422F50 Equivalent & Substitute Parts

Part Overview

The RN731JTTD1422F50 is a 14.2 kOhms ±1% thin film chip resistor in 0603 (1608 Metric) package rated at 0.063W (1/16W) power dissipation. Manufactured by KOA Speer Electronics, Inc., this component features moisture-resistant construction and operates across the temperature range of -55°C to 155°C. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity.

Substiute Parts

RN731JTTD1422F50

KOA Speer Electronics, Inc.In Stock: 968RN731JTTD1422F50 Datasheet

Current PartRFQ

RN73R1JTTD1422F50

KOA Speer Electronics, Inc.In Stock: 909RN73R1JTTD1422F50 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RN731JTTD1422F50 is determined by strict equivalence in the following electrical and mechanical parameters:

Critical Matching Parameters:

• Resistance value: 14.2 kOhms
• Tolerance: ±1%
• Package / Case: 0603 (1608 Metric)
• Composition: Thin Film
• Temperature Coefficient: ±50ppm/°C
• Operating Temperature Range: -55°C ~ 155°C
• Moisture Resistance: Required

Allowable Variation:

• Power Rating: The substitute part may have equal or higher power dissipation rating, provided all other electrical characteristics remain identical.

The identified substitute RN73R1JTTD1422F50 maintains all critical electrical parameters while offering increased power rating (0.1W vs. 0.063W) and active product status with automotive-grade qualification (AEC-Q200).

Parameter Comparison

Engineering Selection Recommendations

The RN73R1JTTD1422F50 is the direct substitute for the obsolete RN731JTTD1422F50. Selection of this substitute is based on the following engineering criteria:

Electrical Equivalence: Both parts maintain identical resistance (14.2 kOhms), tolerance (±1%), temperature coefficient (±50ppm/°C), and operating temperature range (-55°C ~ 155°C). The thin film composition and moisture-resistant construction are preserved.

Mechanical Compatibility: Package dimensions, footprint, and termination configuration are identical, ensuring direct PCB layout compatibility without redesign.

Product Status: The substitute part carries active product status, ensuring long-term availability and supply chain continuity compared to the obsolete main part.

Compliance and Certification: Both parts are ROHS3 compliant with MSL 1 rating. The substitute additionally carries AEC-Q200 automotive qualification, providing enhanced reliability documentation for applications requiring automotive-grade components.

Power Rating Enhancement: The substitute's increased power rating (0.1W vs. 0.063W) provides design margin without introducing any electrical parameter changes, making it suitable for applications with equivalent or slightly higher power dissipation requirements.

Frequently Asked Questions (FAQ)

Q: Can RN73R1JTTD1422F50 be used as a direct replacement for RN731JTTD1422F50?

A: Yes. Both parts share identical electrical specifications (14.2 kOhms ±1%, ±50ppm/°C, -55°C ~ 155°C), package dimensions (0603), and composition (thin film). The substitute offers higher power rating and active product status.

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

A: The main part is rated at 0.063W (1/16W), while the substitute is rated at 0.1W (1/10W). The higher rating in the substitute provides additional thermal margin without changing electrical performance.

Q: Are the physical dimensions identical?

A: Yes. Both parts measure 0.063" L x 0.031" W (1.60mm x 0.80mm) with maximum seated height of 0.022" (0.55mm). PCB footprints are identical.

Q: What does AEC-Q200 certification on the substitute part indicate?

A: AEC-Q200 is an automotive industry qualification standard. The substitute part meets enhanced reliability and testing requirements for automotive applications, though this does not affect its use in non-automotive circuits.

Q: Are both parts RoHS compliant?

A: Yes. Both RN731JTTD1422F50 and RN73R1JTTD1422F50 are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity level).

Q: Why is the main part listed as obsolete?

A: Product obsolescence is determined by the manufacturer. The substitute RN73R1JTTD1422F50 maintains all functional equivalence while offering active product status for continued procurement.