RN732ATTD8662F50 Equivalent & Substitute Parts

Part Overview

The RN732ATTD8662F50 is an 86.6 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 is classified as obsolete product status. The RN732 series features moisture-resistant construction with a temperature coefficient of ±50ppm/°C and operates across the temperature range of -55°C to 155°C.

Due to obsolete product status, equivalent and substitute parts from active manufacturers are necessary to ensure design continuity, supply chain reliability, and long-term component availability. Substitute parts maintain the same resistance value, tolerance, package dimensions, and electrical operating parameters while offering active product status and enhanced feature sets.

Key Parameters

Parameter	Value	Specification
Resistance	86.6 kOhms	Fixed value across all substitutes
Tolerance	±1%	Base tolerance; upgrades available at ±0.5%, ±0.25%, ±0.1%
Power Rating	0.1W (1/10W)	Main part; substitutes rated 0.125W (1/8W) or 0.25W (1/4W)
Package / Case	0805 (2012 Metric)	Fixed across all parts
Composition	Thin Film	Fixed across all parts
Temperature Coefficient	±50ppm/°C	Main part and most substitutes; CRT0805-FX-8662ELF rated ±15ppm/°C
Operating Temperature	-55°C to 155°C	Fixed across all parts
RoHS Status	ROHS3 Compliant	Fixed across all parts
Moisture Sensitivity Level	MSL 1 (Unlimited)	Fixed across all parts

Substitute Part Grouping Explanation

Substitution logic is based on the following criteria:

Primary Substitution Criteria (Non-Negotiable):

Resistance value: 86.6 kOhms (exact match required)
Package / Case: 0805 (2012 Metric) (exact match required)
Composition: Thin Film (exact match required)
Operating Temperature Range: -55°C to 155°C (exact match required)
RoHS Status: ROHS3 Compliant (exact match required)
Moisture Sensitivity Level: MSL 1 (exact match required)

Secondary Substitution Parameters (Upgradeable):

Tolerance: ±1% (main part); substitutes available at ±0.5%, ±0.25%, ±0.1%
Power Rating: 0.1W (main part); substitutes available at 0.125W or 0.25W (higher ratings are backward compatible)
Temperature Coefficient: ±50ppm/°C (main part); CRT0805-FX-8662ELF available at ±15ppm/°C
Product Status: Obsolete (main part); all substitutes are Active
Features: Moisture Resistant (main part); substitutes include Automotive AEC-Q200, Anti-Sulfur, Current Sense certifications

Direct Equivalent (Same Tolerance & Power):

RN73R2ATTD8662F50 (KOA Speer Electronics, Inc.) — Same manufacturer, upgraded power rating (0.125W vs 0.1W), Automotive AEC-Q200 certified, Active status
RT0805FRE0786K6L (YAGEO) — Same tolerance (±1%) and power rating (0.125W), Active status

Upgraded Tolerance Substitutes (Tighter Tolerance):

AT0805DRE0786K6L (YAGEO) — ±0.5% tolerance, 0.125W, Automotive AEC-Q200, Anti-Sulfur
RT0805BRE0786K6L (YAGEO) — ±0.1% tolerance, 0.125W
RT0805CRE0786K6L (YAGEO) — ±0.25% tolerance, 0.125W
RT0805DRE0786K6L (YAGEO) — ±0.5% tolerance, 0.125W

Upgraded Power Rating Substitutes (Higher Power Dissipation):

RNCF0805BTC86K6 (Stackpole Electronics Inc) — ±0.1% tolerance, 0.25W, Automotive AEC-Q200
RNCF0805DTC86K6 (Stackpole Electronics Inc) — ±0.5% tolerance, 0.25W, Automotive AEC-Q200

Specialized Feature Substitutes:

CRT0805-FX-8662ELF (Bourns Inc.) — Current Sense application, ±15ppm/°C temperature coefficient, 0.125W
RT0805FRD0786K6L (YAGEO) — ±25ppm/°C temperature coefficient (improved), 0.125W

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Package	Product Status	Features
RN732ATTD8662F50	KOA Speer Electronics, Inc.	86.6 kΩ	±1%	0.1	±50	0805	Obsolete	Moisture Resistant
RN73R2ATTD8662F50	KOA Speer Electronics, Inc.	86.6 kΩ	±1%	0.125	±50	0805	Active	Automotive AEC-Q200, Moisture Resistant
RT0805FRE0786K6L	YAGEO	86.6 kΩ	±1%	0.125	±50	0805	Active	—
AT0805DRE0786K6L	YAGEO	86.6 kΩ	±0.5%	0.125	±50	0805	Active	Anti-Sulfur, Automotive AEC-Q200, Moisture Resistant
CRT0805-FX-8662ELF	Bourns Inc.	86.6 kΩ	±1%	0.125	±15	0805	Active	Current Sense
RNCF0805BTC86K6	Stackpole Electronics Inc	86.6 kΩ	±0.1%	0.25	±50	0805	Active	Automotive AEC-Q200
RNCF0805DTC86K6	Stackpole Electronics Inc	86.6 kΩ	±0.5%	0.25	±50	0805	Active	Automotive AEC-Q200
RT0805BRE0786K6L	YAGEO	86.6 kΩ	±0.1%	0.125	±50	0805	Active	—
RT0805CRE0786K6L	YAGEO	86.6 kΩ	±0.25%	0.125	±50	0805	Active	—
RT0805DRE0786K6L	YAGEO	86.6 kΩ	±0.5%	0.125	±50	0805	Active	—
RT0805FRD0786K6L	YAGEO	86.6 kΩ	±1%	0.125	±25	0805	Active	—

Engineering Selection Recommendations

For Direct Replacement (Minimum Specification Change):

Select RN73R2ATTD8662F50 (KOA Speer Electronics, Inc.) when maintaining the same manufacturer is preferred. This part is Active status, rated at 0.125W (higher than the original 0.1W), maintains ±1% tolerance, and includes Automotive AEC-Q200 certification. The increased power rating provides additional thermal margin without affecting circuit performance.

Select RT0805FRE0786K6L (YAGEO) for a direct equivalent from an alternative manufacturer. This part maintains ±1% tolerance and 0.125W power rating with Active product status.

For Improved Tolerance Requirements:

Select RT0805BRE0786K6L (YAGEO) when ±0.1% tolerance is required. This part is Active status with 0.125W power rating.

Select AT0805DRE0786K6L (YAGEO) when ±0.5% tolerance with Automotive AEC-Q200 and Anti-Sulfur features is required.

Select RT0805CRE0786K6L (YAGEO) when ±0.25% tolerance is required as an intermediate option.

For Higher Power Dissipation:

Select RNCF0805BTC86K6 (Stackpole Electronics Inc) when 0.25W power rating is required with ±0.1% tolerance and Automotive AEC-Q200 certification.

Select RNCF0805DTC86K6 (Stackpole Electronics Inc) when 0.25W power rating is required with ±0.5% tolerance and Automotive AEC-Q200 certification.

For Specialized Applications:

Select CRT0805-FX-8662ELF (Bourns Inc.) for current sense applications requiring ±15ppm/°C temperature coefficient (superior stability compared to ±50ppm/°C).

Select RT0805FRD0786K6L (YAGEO) when improved temperature coefficient of ±25ppm/°C is required with ±1% tolerance.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and -55°C to 155°C operating temperature range. All substitute parts are Active product status, ensuring long-term supply chain availability compared to the obsolete RN732ATTD8662F50.

Frequently Asked Questions (FAQ)

Q: Can RN73R2ATTD8662F50 directly replace RN732ATTD8662F50?

A: Yes. Both parts share identical resistance (86.6 kOhms), tolerance (±1%), package (0805), composition (thin film), and operating temperature range (-55°C to 155°C). RN73R2ATTD8662F50 has a higher power rating (0.125W vs 0.1W), which is backward compatible. RN73R2ATTD8662F50 is Active status and includes Automotive AEC-Q200 certification.

Q: What is the difference between tolerance grades?

A: Tolerance specifies the maximum deviation from the nominal 86.6 kOhms value. ±1% allows ±0.866 kOhms deviation. ±0.5% allows ±0.433 kOhms deviation. ±0.25% allows ±0.2165 kOhms deviation. ±0.1% allows ±0.0866 kOhms deviation. Tighter tolerance grades are suitable for precision analog circuits, measurement equipment, and applications requiring stable reference resistances.

Q: Can I use a 0.125W or 0.25W rated part instead of 0.1W?

A: Yes. Higher power ratings are backward compatible. A 0.125W or 0.25W rated resistor can safely operate in circuits designed for 0.1W components. The higher power rating provides additional thermal margin and does not affect electrical performance. Physical dimensions remain identical (0805 package).

Q: What is temperature coefficient and why does it matter?

A: Temperature coefficient (ppm/°C) specifies how the resistance value changes with temperature. ±50ppm/°C means the resistance changes by 50 parts per million per degree Celsius. Lower temperature coefficients (±15ppm/°C, ±25ppm/°C) provide better stability across temperature variations. Select lower temperature coefficients for precision applications, measurement circuits, and systems operating across wide temperature ranges.

Q: Are YAGEO RT series parts equivalent to KOA Speer RN series?

A: Yes, when electrical and mechanical parameters match. YAGEO RT0805FRE0786K6L and RT0805FRD0786K6L are functionally equivalent to RN732ATTD8662F50 and RN73R2ATTD8662F50 respectively. Both manufacturers produce thin film 0805 chip resistors with identical package dimensions, operating temperature ranges, and RoHS compliance. Selection between manufacturers depends on supply chain availability, cost, and specific feature requirements.

Q: What does Automotive AEC-Q200 certification mean?

A: AEC-Q200 is an automotive industry qualification standard for passive components. Parts certified to AEC-Q200 meet stringent reliability, temperature cycling, and environmental stress requirements specified by automotive manufacturers. Select AEC-Q200 certified parts for automotive applications, industrial equipment, and systems requiring enhanced reliability and long-term performance guarantees.

Q: What is the difference between Current Sense and standard resistors?

A: Current Sense resistors (CRT0805-FX-8662ELF) are optimized for low-noise, high-accuracy current measurement applications. They feature tighter tolerance, lower temperature coefficient, and superior frequency response compared to standard resistors. Use Current Sense resistors in power management circuits, battery monitoring systems, and precision current measurement applications.

Q: Can I substitute a part with different package dimensions?

A: No. All substitute parts must maintain the 0805 (2012 Metric) package format. Package dimensions are fixed at 0.079" L × 0.049" W (2.00mm × 1.25mm). Different package sizes are not interchangeable on PCBs designed for 0805 components.

Q: What is MSL 1 (Unlimited) moisture sensitivity?

A: MSL 1 indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. No baking or desiccant storage is required. All listed substitute parts maintain MSL 1 rating, ensuring identical handling and storage requirements.

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