RN732ATTD1291F25 Equivalent & Substitute Parts

Part Overview

The RN732ATTD1291F25 is a 1.29 kOhms ±1% thin film chip resistor in 0805 (2012 Metric) package rated at 0.1W (1/10W) with moisture-resistant construction. Manufactured by KOA Speer Electronics, Inc., this component is classified as obsolete. Due to its obsolete status and limited availability relative to active alternatives, equivalent and substitute parts with identical or superior electrical and mechanical characteristics are available from multiple manufacturers.

Substiute Parts

RN732ATTD1291F25

KOA Speer Electronics, Inc.In Stock: 944RN732ATTD1291F25 Datasheet

Current PartRFQ

RN73R2ATTD1291F25

KOA Speer Electronics, Inc.In Stock: 750RN73R2ATTD1291F25 Datasheet

DirectRFQ

PAT0805E1291BST1

Vishay Dale Thin FilmIn Stock: 854PAT0805E1291BST1 Datasheet

UpgradeRFQ

PHP00805E1291BBT1

Vishay Dale Thin FilmIn Stock: 1235PHP00805E1291BBT1 Datasheet

UpgradeRFQ

PHP00805E1291BST1

Vishay Dale Thin FilmIn Stock: 1053PHP00805E1291BST1 Datasheet

UpgradeRFQ

RT0805BRD071K29L

YAGEOIn Stock: 1211RT0805BRD071K29L Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Mandatory Compatibility Parameters:

• Resistance value: 1.29 kOhms (exact match required)
• Package / Case: 0805 (2012 Metric) (exact match required)
• Composition: Thin Film (exact match required)
• Temperature Coefficient: ±25ppm/°C (exact match required)
• Operating Temperature Range: -55°C ~ 155°C (exact match or superior required)
• Moisture Sensitivity Level: 1 (Unlimited) (exact match required)

Allowable Upgrade Parameters:

• Tolerance: ±1% or better (±0.1% is acceptable as upgrade)
• Power Rating: 0.1W or higher (0.125W, 0.2W, 0.63W are acceptable as upgrades)
• Product Status: Active preferred over obsolete
• RoHS Compliance: ROHS3 Compliant preferred

All substitute parts listed meet the mandatory compatibility parameters and represent either direct equivalents or functional upgrades.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Same Tolerance, Active Status): RN73R2ATTD1291F25 from KOA Speer Electronics is the primary direct equivalent. It maintains ±1% tolerance matching the original specification, increases power rating to 0.125W (acceptable upgrade), and is currently in active production status with ROHS3 compliance.

Upgraded Tolerance Alternatives (±0.1%, Active Status): PAT0805E1291BST1, PHP00805E1291BST1, and RT0805BRD071K29L all provide ±0.1% tolerance (superior to the original ±1%), higher power ratings, and active product status. These are suitable for applications requiring tighter tolerance control.

RoHS Compliance Consideration: PHP00805E1291BBT1 is RoHS non-compliant and should be selected only when RoHS3 compliance is not a requirement. PHP00805E1291BST1 is the RoHS3-compliant variant of the same series and specifications.

Packaging: All substitute parts are supplied in Tape & Reel (TR) packaging, suitable for automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can RN73R2ATTD1291F25 directly replace RN732ATTD1291F25? A: Yes. Both parts share identical resistance (1.29 kΩ), tolerance (±1%), package (0805), composition (thin film), and operating temperature range (-55°C ~ 155°C). RN73R2ATTD1291F25 has a higher power rating (0.125W vs. 0.1W) and is in active production, making it a suitable direct replacement.

Q: What is the difference between the KOA and Vishay alternatives? A: KOA RN73R2ATTD1291F25 maintains the original ±1% tolerance. Vishay PAT0805E1291BST1 and PHP series parts offer ±0.1% tolerance with higher power ratings (0.2W and 0.63W respectively). Selection depends on tolerance and power requirements of the application.

Q: Are the Vishay PHP parts interchangeable? A: PHP00805E1291BBT1 and PHP00805E1291BST1 have identical electrical and mechanical specifications. The difference is RoHS compliance: BBT1 is non-compliant, while BST1 is ROHS3 compliant. Select BST1 for RoHS3-regulated applications.

Q: Does the YAGEO RT0805BRD071K29L meet the same specifications? A: Yes. RT0805BRD071K29L matches all mandatory parameters with ±0.1% tolerance (upgrade), 0.125W power rating, and ROHS3 compliance. It is suitable for applications requiring tighter tolerance control.

Q: Can I use a higher power-rated resistor in place of the 0.1W original? A: Yes, provided the package dimensions and thermal characteristics are compatible with the PCB layout. Higher power ratings (0.125W, 0.2W, 0.63W) in the same 0805 package are acceptable upgrades for most applications.

Q: What is the significance of MSL 1 (Unlimited)? A: MSL 1 indicates unlimited shelf life without moisture baking requirements. All listed substitute parts maintain this specification, ensuring no additional moisture handling procedures are necessary.