RN731ETTP1891F25 Equivalent & Substitute Parts

Part Overview

The RN731ETTP1891F25 is a 1.89 kOhm ±1% thin film chip resistor in 0402 (1005 Metric) package rated for 0.063W (1/16W) power dissipation. Manufactured by KOA Speer Electronics, Inc., this component is classified as obsolete product status. Due to its obsolete designation, identifying equivalent and substitute parts is necessary to maintain design continuity and ensure supply chain availability for new production runs or design revisions.

Substiute Parts

RN731ETTP1891F25

KOA Speer Electronics, Inc.In Stock: 1092RN731ETTP1891F25 Datasheet

Current PartRFQ

RN73R1ETTP1891F25

KOA Speer Electronics, Inc.In Stock: 954RN73R1ETTP1891F25 Datasheet

DirectRFQ

TNPW04021K89BEED

Vishay DaleIn Stock: 967TNPW04021K89BEED Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RN731ETTP1891F25 is determined by the following critical parameters:

• Resistance Value: Must be 1.89 kOhms
• Tolerance: ±1% or tighter (±0.1% is acceptable as an upgrade)
• Package / Case: 0402 (1005 Metric) form factor
• Power Rating: Minimum 0.063W; higher ratings are acceptable
• Composition: Thin film technology
• Temperature Coefficient: ±25ppm/°C or better
• Operating Temperature Range: Must support -55°C ~ 155°C minimum
• Compliance: ROHS3 Compliant, MSL 1

Two substitute parts meet these criteria: RN73R1ETTP1891F25 (direct equivalent with automotive qualification) and TNPW04021K89BEED (upgraded specification with enhanced tolerance and power rating).

Parameter Comparison

Engineering Selection Recommendations

RN73R1ETTP1891F25 is the direct equivalent substitute. It maintains identical electrical specifications (1.89 kOhms ±1%, 0.063W, ±25ppm/°C) and physical package (0402) while offering active product status. This part adds Automotive AEC-Q200 qualification, making it suitable for applications requiring automotive-grade reliability without altering circuit performance. Selection of this part is appropriate when direct replacement is required with enhanced supply chain availability.

TNPW04021K89BEED is an upgraded substitute from Vishay Dale. It provides superior tolerance (±0.1% versus ±1%), increased power rating (0.13W versus 0.063W), extended operating temperature range (-55°C ~ 175°C versus -55°C ~ 155°C), and anti-sulfur coating. This part carries Automotive AEC-Q200 certification. Selection of this part is appropriate for applications where improved tolerance, thermal headroom, or enhanced environmental protection is beneficial, provided circuit design accommodates the upgraded specifications.

Both substitute parts maintain ROHS3 compliance, MSL 1 rating, and identical package dimensions, ensuring mechanical and environmental compatibility with the original design.

Frequently Asked Questions (FAQ)

Q: Can RN73R1ETTP1891F25 be used as a direct replacement for RN731ETTP1891F25?

A: Yes. Both parts share identical resistance (1.89 kOhms), tolerance (±1%), power rating (0.063W), package (0402), temperature coefficient (±25ppm/°C), and operating temperature range (-55°C ~ 155°C). The primary difference is product status (Active versus Obsolete) and the addition of Automotive AEC-Q200 qualification on the substitute.

Q: What are the advantages of TNPW04021K89BEED over the direct equivalent?

A: TNPW04021K89BEED offers three technical upgrades: tolerance of ±0.1% (versus ±1%), power rating of 0.13W (versus 0.063W), and operating temperature range extended to 175°C (versus 155°C). It also includes anti-sulfur coating and Automotive AEC-Q200 certification. These enhancements provide greater design margin and environmental protection.

Q: Are there any compatibility concerns when substituting these parts?

A: No compatibility concerns exist. All three parts use identical 0402 (1005 Metric) package dimensions, identical footprint, and identical termination configuration (2 terminations). Mechanical and electrical interfaces are fully compatible.

Q: Which substitute should be selected for new designs?

A: For new designs, either substitute is acceptable based on application requirements. RN73R1ETTP1891F25 provides cost-effective direct equivalence with active supply. TNPW04021K89BEED is appropriate when improved tolerance, thermal margin, or enhanced environmental specifications add value to the application.

Q: Do all parts meet RoHS and MSL requirements?

A: Yes. All three parts (RN731ETTP1891F25, RN73R1ETTP1891F25, and TNPW04021K89BEED) are ROHS3 Compliant with Moisture Sensitivity Level 1 (Unlimited), ensuring compliance with environmental and handling standards.