RN732ATTD2002D25 Equivalent & Substitute Parts

Part Overview

The RN732ATTD2002D25 is a 20 kOhms ±0.5% thin film chip resistor manufactured by KOA Speer Electronics, Inc., rated at 0.1W (1/10W) in 0805 (2012 Metric) surface mount package. This component features moisture-resistant construction with a temperature coefficient of ±25ppm/°C and operates across -55°C to 155°C. The part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Resistance	20 kOhms
Tolerance	±0.5%
Power Rating	0.1W (1/10W)
Package	0805 (2012 Metric)
Composition	Thin Film
Temperature Coefficient	±25ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Moisture Resistance	Yes
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the RN732ATTD2002D25 is determined by the following critical parameters:

Mandatory Matching Parameters:

Resistance value: 20 kOhms
Package type: 0805 (2012 Metric)
Composition: Thin Film
Temperature coefficient: ±25ppm/°C
Operating temperature range: -55°C to 155°C minimum
RoHS3 compliance
MSL rating: 1 (Unlimited)

Allowable Variation Parameters:

Tolerance: ±0.5% or tighter (±0.25%, ±0.1%)
Power rating: 0.1W or higher (0.125W, 0.25W acceptable)
Moisture resistance: Present in all substitutes
Packaging format: Tape & Reel acceptable for manufacturing environments

Substitute parts are categorized into two groups: Direct Substitutes (matching all electrical and mechanical specifications) and Upgrade Substitutes (enhanced tolerance or power rating while maintaining compatibility).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op Temp Range	Product Status	Features
RN732ATTD2002D25	KOA Speer Electronics	20 kΩ	±0.5%	0.1	0805	±25ppm/°C	-55~155°C	Obsolete	Moisture Resistant
RN73R2ATTD2002D25	KOA Speer Electronics	20 kΩ	±0.5%	0.125	0805	±25ppm/°C	-55~155°C	Active	Automotive AEC-Q200, Moisture Resistant
CRT0805-DY-2002ELF	Bourns Inc.	20 kΩ	±0.5%	0.125	0805	±25ppm/°C	-55~155°C	Active	Current Sense
RR1220P-203-D	Susumu	20 kΩ	±0.5%	0.1	0805	±25ppm/°C	-55~125°C	Active	Thin Film
RT0805DRD0720KL	YAGEO	20 kΩ	±0.5%	0.125	0805	±25ppm/°C	-55~155°C	Active	Thin Film
3-2176093-2	TE Connectivity Passive Product	20 kΩ	±0.1%	0.25	0805	±25ppm/°C	-55~155°C	Active	Thin Film
ACPP0805 20K B	Ohmite	20 kΩ	±0.1%	0.1	0805	±25ppm/°C	-55~155°C	Active	Thin Film
AT0805BRD0720KL	YAGEO	20 kΩ	±0.1%	0.125	0805	±25ppm/°C	-55~155°C	Active	Anti-Sulfur, Automotive AEC-Q200, Moisture Resistant
AT0805CRD0720KL	YAGEO	20 kΩ	±0.25%	0.125	0805	±25ppm/°C	-55~155°C	Active	Anti-Sulfur, Automotive AEC-Q200, Moisture Resistant
AT0805DRD0720KL	YAGEO	20 kΩ	±0.5%	0.125	0805	±25ppm/°C	-55~155°C	Active	Anti-Sulfur, Automotive AEC-Q200, Moisture Resistant
CPF-A-0805B20KE	TE Connectivity Passive Product	20 kΩ	±0.1%	0.1	0805	±25ppm/°C	-55~155°C	Active	Anti-Sulfur, Automotive AEC-Q200, Moisture Resistant

Engineering Selection Recommendations

Direct Substitutes (Equivalent Electrical and Mechanical Performance):

The RN73R2ATTD2002D25 from KOA Speer Electronics serves as the primary direct substitute. It maintains identical resistance, tolerance, and temperature coefficient specifications while offering increased power rating (0.125W vs. 0.1W) and active product status. This part includes automotive AEC-Q200 qualification, providing enhanced reliability documentation for applications requiring automotive-grade components.

The RR1220P-203-D from Susumu provides an alternative direct substitute with matching 0.1W power rating and ±0.5% tolerance. However, its operating temperature range extends only to 125°C, making it unsuitable for applications requiring the full -55°C to 155°C range of the original part.

The RT0805DRD0720KL from YAGEO and CRT0805-DY-2002ELF from Bourns both offer 0.125W power ratings with full -55°C to 155°C operating range and ±0.5% tolerance. Both are active products with ROHS3 compliance and MSL 1 rating.

Upgrade Substitutes (Enhanced Specifications):

The AT0805BRD0720KL, AT0805CRD0720KL, and AT0805DRD0720KL from YAGEO provide enhanced tolerance specifications (±0.1% and ±0.25%) while maintaining 0.125W power rating and full operating temperature range. All three include anti-sulfur and automotive AEC-Q200 features with active product status.

The ACPP0805 20K B from Ohmite and CPF-A-0805B20KE from TE Connectivity both offer ±0.1% tolerance with 0.1W power rating matching the original specification. The CPF-A variant includes automotive AEC-Q200 and anti-sulfur features.

The 3-2176093-2 from TE Connectivity represents the highest specification upgrade with ±0.1% tolerance and 0.25W power rating, providing maximum performance margin for demanding applications.

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and ±25ppm/°C temperature coefficient. Selection should prioritize active product status and compliance certifications appropriate to the application environment.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with higher power rating than the original RN732ATTD2002D25?

A: Yes. The 0805 package accommodates power ratings of 0.125W and 0.25W without dimensional changes. Higher power ratings provide additional thermal margin and do not affect electrical compatibility when resistance, tolerance, and temperature coefficient match the original specification.

Q: What is the significance of the ±0.5% tolerance specification?

A: Tolerance defines the maximum deviation of actual resistance from the nominal 20 kOhms value. The ±0.5% tolerance allows actual values between 19.9 kOhms and 20.1 kOhms. Substitute parts with tighter tolerance (±0.25% or ±0.1%) are fully compatible and provide improved accuracy for precision circuit applications.

Q: Are automotive AEC-Q200 qualified parts suitable for non-automotive applications?

A: Yes. Automotive AEC-Q200 qualification indicates enhanced reliability testing and quality assurance. These parts are fully compatible with non-automotive applications and provide additional performance assurance. The qualification does not restrict use to automotive environments.

Q: Why does the RR1220P-203-D have a lower maximum operating temperature?

A: The RR1220P-203-D operates to 125°C maximum, compared to 155°C for other substitutes. This part is not suitable for applications requiring the full -55°C to 155°C range of the original RN732ATTD2002D25. Verify application temperature requirements before selection.

Q: What does MSL 1 (Unlimited) moisture sensitivity rating mean?

A: MSL 1 indicates the component requires no special moisture protection during storage or handling. The part can be stored indefinitely without desiccant packaging or environmental controls, simplifying inventory management and manufacturing logistics.

Q: Can I substitute the RN732ATTD2002D25 with a part having different package dimensions?

A: No. All substitute parts specified maintain the 0805 (2012 Metric) package with identical footprint dimensions (0.079" L x 0.049" W / 2.00mm x 1.25mm). Package compatibility is mandatory for PCB assembly without design modification.

Q: What is the difference between thin film and other resistor compositions?

A: Thin film resistors provide superior tolerance accuracy, lower temperature coefficient, and better frequency response compared to thick film or carbon film types. All parts in this substitution list use thin film construction, ensuring consistent performance characteristics.

Q: Is the current sense feature of the CRT0805-DY-2002ELF relevant for general applications?

A: Current sense designation indicates optimized performance for current measurement circuits. For general-purpose 20 kOhms resistor applications, this feature is not required but does not prevent use. The electrical specifications remain identical to non-current-sense alternatives.

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