RN731JTTD2103C50 Equivalent & Substitute Parts

Part Overview

The RN731JTTD2103C50 is a 210 kOhms ±0.25% thin film chip resistor in 0603 (1608 Metric) package rated at 0.063W (1/16W) with moisture resistant construction. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing production and maintenance applications. The part operates across -55°C to 155°C with a temperature coefficient of ±50ppm/°C and meets ROHS3 compliance requirements.

Substiute Parts

RN731JTTD2103C50

KOA Speer Electronics, Inc.In Stock: 773RN731JTTD2103C50 Datasheet

Current PartRFQ

RN73R1JTTD2103C50

KOA Speer Electronics, Inc.In Stock: 826RN73R1JTTD2103C50 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RN731JTTD2103C50 is determined by strict equivalence in the following parameters:

Critical Matching Parameters:

• Resistance value: 210 kOhms
• Tolerance: ±0.25%
• Package type: 0603 (1608 Metric)
• Composition: Thin Film
• Temperature coefficient: ±50ppm/°C
• Operating temperature range: -55°C to 155°C
• Moisture resistance capability
• RoHS3 compliance

Allowable Variation:

• Power rating may be equal or higher than the original 0.063W specification
• Packaging format (bulk vs. tape & reel) does not affect electrical equivalence
• Product status transition from obsolete to active is acceptable for substitution purposes

The RN73R1JTTD2103C50 meets all critical matching parameters with an increased power rating of 0.1W (1/10W) and active product status, making it a valid substitute.

Parameter Comparison

Engineering Selection Recommendations

The RN73R1JTTD2103C50 is the direct substitute for the obsolete RN731JTTD2103C50. Selection is based on the following engineering criteria:

Electrical Equivalence: Both parts maintain identical resistance (210 kOhms), tolerance (±0.25%), temperature coefficient (±50ppm/°C), and operating temperature range (-55°C to 155°C). The increased power rating of the substitute (0.1W vs. 0.063W) provides additional thermal margin without affecting circuit performance.

Compliance and Certifications: Both parts are ROHS3 compliant with MSL rating of 1 (Unlimited), ensuring compatibility with standard manufacturing and storage processes. The substitute carries AEC-Q200 automotive qualification, indicating enhanced reliability screening.

Product Status: The transition from obsolete to active status ensures long-term availability and supply chain continuity for the RN73R1JTTD2103C50.

Package Compatibility: Identical 0603 (1608 Metric) package dimensions and footprint ensure direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the RN73R1JTTD2103C50 be used as a direct replacement for RN731JTTD2103C50 in existing designs?

A: Yes. Both parts share identical electrical specifications (210 kOhms, ±0.25% tolerance, ±50ppm/°C temperature coefficient) and package dimensions (0603). The substitute's higher power rating (0.1W vs. 0.063W) is compatible with applications designed for the original part.

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

A: The RN73R1JTTD2103C50 is rated at 0.1W compared to the original 0.063W. This higher rating provides additional thermal dissipation capability and does not negatively impact circuit operation. Applications requiring the original 0.063W rating remain fully compatible.

Q: Are there packaging differences between these parts?

A: The main part is supplied in standard packaging, while the substitute is available in Tape & Reel (TR) format. Both use identical 0603 (1608 Metric) package geometry. Packaging format does not affect electrical performance or PCB mounting.

Q: Why does the substitute part include AEC-Q200 qualification?

A: The RN73R1JTTD2103C50 carries automotive AEC-Q200 qualification, indicating enhanced reliability testing and quality assurance. This certification is an additional benefit and does not restrict use in non-automotive applications.

Q: Is the substitute part ROHS3 compliant?

A: Yes. The RN73R1JTTD2103C50 is ROHS3 compliant with MSL rating 1 (Unlimited), matching the compliance profile of the original part.

Q: What is the temperature coefficient specification and why is it important?

A: Both parts have a temperature coefficient of ±50ppm/°C, meaning resistance changes by a maximum of 50 parts per million for each degree Celsius change in operating temperature. This specification ensures predictable performance across the -55°C to 155°C operating range.