Equivalent & Substitute Parts for RN731JTTD2003B50

Part Overview

The RN731JTTD2003B50 is a 200 kOhms ±0.1% thin film chip resistor in 0603 (1608 Metric) package rated at 0.063W (1/16W) with moisture resistant construction. Manufactured by KOA Speer Electronics, Inc., this component is classified as obsolete product status. Due to its obsolete designation, identifying equivalent and substitute parts with active product status becomes necessary for ongoing design support, procurement continuity, and new production requirements.

Substiute Parts

RN731JTTD2003B50

KOA Speer Electronics, Inc.In Stock: 938RN731JTTD2003B50 Datasheet

Current PartRFQ

RN73R1JTTD2003B50

KOA Speer Electronics, Inc.In Stock: 1043RN73R1JTTD2003B50 Datasheet

DirectRFQ

TNPW0603200KBETA

Vishay DaleIn Stock: 11122TNPW0603200KBETA Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RN731JTTD2003B50 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 200 kOhms
• Tolerance: ±0.1%
• Package / Case: 0603 (1608 Metric)
• Composition: Thin Film
• Number of Terminations: 2

Allowable Variation Parameters:

• Power Rating: Substitute parts may have equal or higher power ratings (0.1W or greater is acceptable for 0.063W requirement)
• Temperature Coefficient: Substitute parts may have equal or tighter specifications (±25ppm/°C is acceptable for ±50ppm/°C requirement)
• Operating Temperature Range: Substitute parts must maintain minimum -55°C lower bound; upper bound may vary
• Product Status: Active status substitutes are preferred for obsolete parts
• Certifications and Features: Additional certifications (AEC-Q200, Military) do not disqualify substitution

Two substitute parts meet these criteria and are listed below.

Parameter Comparison

Engineering Selection Recommendations

RN73R1JTTD2003B50 (Direct Substitute - Recommended for Standard Applications)

The RN73R1JTTD2003B50 is the primary substitute for the obsolete RN731JTTD2003B50. Both parts are manufactured by KOA Speer Electronics, Inc., and share identical electrical specifications (200 kOhms, ±0.1% tolerance, ±50ppm/°C temperature coefficient, -55°C ~ 155°C operating range). The RN73R1JTTD2003B50 features active product status, higher power rating (0.1W versus 0.063W), automotive AEC-Q200 qualification, and ROHS3 compliance. The increased power rating provides additional thermal margin without affecting circuit performance. This part is suitable for applications requiring RoHS compliance and standard industrial or automotive environments.

TNPW0603200KBETA (Upgrade Substitute - For Military or High-Precision Applications)

The TNPW0603200KBETA manufactured by Vishay Dale serves as an upgrade substitute for applications requiring enhanced performance specifications. This part maintains the 200 kOhms resistance and ±0.1% tolerance but offers superior temperature coefficient performance (±25ppm/°C versus ±50ppm/°C), military-grade construction, and active product status. The operating temperature range is -55°C ~ 125°C, which is narrower than the main part but sufficient for most industrial applications. The TNPW0603200KBETA is RoHS non-compliant and REACH-affected, making it unsuitable for applications with mandatory RoHS requirements. Selection of this part is appropriate for military applications, high-precision measurement circuits, or designs where tighter temperature coefficient tolerance is critical.

Frequently Asked Questions (FAQ)

Q: Can RN73R1JTTD2003B50 directly replace RN731JTTD2003B50 in existing designs?

A: Yes. Both parts share identical resistance (200 kOhms), tolerance (±0.1%), package (0603), composition (thin film), temperature coefficient (±50ppm/°C), and operating temperature range (-55°C ~ 155°C). The RN73R1JTTD2003B50 has a higher power rating (0.1W versus 0.063W), which is compatible with circuits designed for the lower-rated part. No circuit modifications are required.

Q: What is the key difference between the two substitute parts?

A: RN73R1JTTD2003B50 is a direct equivalent from the same manufacturer with automotive AEC-Q200 certification and ROHS3 compliance. TNPW0603200KBETA is a cross-manufacturer substitute from Vishay Dale with superior temperature coefficient (±25ppm/°C), military-grade features, but RoHS non-compliance. Selection depends on application requirements for compliance and performance specifications.

Q: Is the TNPW0603200KBETA suitable for RoHS-compliant applications?

A: No. The TNPW0603200KBETA is RoHS non-compliant and REACH-affected. Applications requiring RoHS3 compliance must use RN73R1JTTD2003B50 or equivalent RoHS-compliant alternatives.

Q: Does the higher power rating of substitute parts affect circuit behavior?

A: No. The 0.1W power rating of both substitute parts is a maximum specification. Circuits designed for 0.063W operation will function identically with 0.1W-rated resistors. The higher rating provides additional thermal margin and reliability margin without changing electrical performance.

Q: Are there packaging differences between the main part and substitutes?

A: All three parts use 0603 (1608 Metric) package with identical footprints. Physical dimensions are nearly identical (length 1.60mm, height 0.55mm maximum). The TNPW0603200KBETA has a slightly wider body (0.85mm versus 0.80mm), but this does not affect PCB layout compatibility for standard 0603 footprints.

Q: Which substitute should be selected for new production designs?

A: RN73R1JTTD2003B50 is recommended for new production designs requiring standard performance, RoHS compliance, and automotive qualification. TNPW0603200KBETA is selected when military-grade specifications or tighter temperature coefficient tolerance is a design requirement and RoHS compliance is not mandated.