Equivalent & Substitute Parts for RN732ATTD1721F50

Part Overview

The RN732ATTD1721F50 is a 1.72 kOhms ±1% thin film chip resistor manufactured by KOA Speer Electronics, Inc., rated at 0.1W (1/10W) in 0805 (2012 Metric) package format. This component features moisture-resistant construction and operates across the temperature range of -55°C to 155°C. The part is currently classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity.

Substiute Parts

RN732ATTD1721F50

KOA Speer Electronics, Inc.In Stock: 1070RN732ATTD1721F50 Datasheet

Current PartRFQ

RN73R2ATTD1721F50

KOA Speer Electronics, Inc.In Stock: 1081RN73R2ATTD1721F50 Datasheet

DirectRFQ

PHP00805H1721BBT1

Vishay Dale Thin FilmIn Stock: 913PHP00805H1721BBT1 Datasheet

UpgradeRFQ

PHP00805H1721BST1

Vishay Dale Thin FilmIn Stock: 799PHP00805H1721BST1 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RN732ATTD1721F50 is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

• Resistance value: 1.72 kOhms (exact match required)
• Package format: 0805 (2012 Metric) (physical compatibility)
• Temperature coefficient: ±50ppm/°C (thermal stability)
• Operating temperature range: -55°C ~ 155°C (environmental compatibility)
• Composition: Thin Film (performance characteristics)
• Moisture Sensitivity Level: 1 (Unlimited) (handling and storage)

Allowable Variation Parameters:

• Tolerance: May be equal or tighter (±1% or better)
• Power rating: May be equal or higher (0.1W or greater)
• Product status: Active status preferred for obsolete parts
• Compliance certifications: Additional certifications acceptable

The substitute parts listed below satisfy all critical matching parameters while offering improvements in tolerance, power rating, or compliance status.

Parameter Comparison

Engineering Selection Recommendations

RN73R2ATTD1721F50 (Direct Substitute - KOA Speer Electronics, Inc.)

This part provides direct substitution with identical electrical specifications and improved product status. The RN73R2ATTD1721F50 maintains the same resistance, tolerance, and temperature characteristics as the obsolete RN732ATTD1721F50 while offering a higher power rating (0.125W vs. 0.1W). The inclusion of Automotive AEC-Q200 certification provides additional qualification for demanding applications. ROHS3 compliance is maintained. This substitute is recommended as the primary replacement for the obsolete main part.

PHP00805H1721BST1 (Upgrade Substitute - Vishay Dale Thin Film)

This part offers enhanced performance specifications with tighter tolerance (±0.1% vs. ±1%) and significantly higher power rating (0.63W vs. 0.1W). The PHP00805H1721BST1 includes flame-proof and safety certifications in addition to moisture resistance. ROHS3 compliance is maintained. This substitute is suitable for applications requiring improved precision and thermal headroom.

PHP00805H1721BBT1 (Upgrade Substitute - Vishay Dale Thin Film)

This part provides identical electrical and thermal performance to the PHP00805H1721BST1 variant, with equivalent tolerance and power rating specifications. The primary distinction is RoHS non-compliance status. Selection of this part requires confirmation that RoHS compliance is not a design or regulatory requirement.

Frequently Asked Questions (FAQ)

Q: Can RN73R2ATTD1721F50 be used as a direct replacement for RN732ATTD1721F50?

A: Yes. Both parts share identical resistance (1.72 kOhms), tolerance (±1%), package format (0805), temperature coefficient (±50ppm/°C), and operating temperature range (-55°C ~ 155°C). The RN73R2ATTD1721F50 offers higher power rating (0.125W vs. 0.1W) and active product status, making it a suitable direct substitute.

Q: What is the difference between the two Vishay PHP parts?

A: PHP00805H1721BST1 and PHP00805H1721BBT1 are electrically and thermally identical, both rated at 1.72 kOhms ±0.1% with 0.63W power rating. The distinction is RoHS compliance: PHP00805H1721BST1 is ROHS3 compliant, while PHP00805H1721BBT1 is RoHS non-compliant. Selection depends on regulatory and design requirements.

Q: Are the physical dimensions compatible across all substitute parts?

A: All substitute parts use the 0805 (2012 Metric) package format. The main part and KOA substitute (RN73R2ATTD1721F50) have identical dimensions (0.079" L x 0.049" W, height 0.024" max). Vishay PHP parts have slightly larger dimensions (0.080" L x 0.050" W, height 0.033" max) due to different construction. Verify PCB layout clearance before selecting Vishay alternatives.

Q: Can I use a higher power-rated resistor in place of the 0.1W part?

A: Yes. Higher power ratings (0.125W or 0.63W) are acceptable substitutes provided all other electrical parameters match. Higher power ratings indicate greater thermal capacity and do not negatively affect circuit performance in applications designed for lower power dissipation.

Q: What does Moisture Sensitivity Level 1 (Unlimited) mean?

A: MSL 1 (Unlimited) indicates the component has no moisture sensitivity restrictions. These parts can be stored and handled without special moisture control measures, simplifying inventory management and procurement logistics.

Q: Are automotive-qualified parts suitable for non-automotive applications?

A: Yes. Automotive AEC-Q200 qualification (as in RN73R2ATTD1721F50) indicates enhanced reliability testing and quality standards. These parts are suitable for any application and offer no disadvantage in non-automotive use.