RN732ATTD2002F50 Equivalent & Substitute Parts

Part Overview

The RN732ATTD2002F50 is a 20 kOhms ±1% 0.1W thin film chip resistor in 0805 (2012 Metric) package manufactured by KOA Speer Electronics, Inc. This component features moisture-resistant construction with a temperature coefficient of ±50ppm/°C and operates across -55°C to 155°C. The part is currently obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and production requirements.

Key Parameters

Parameter	Value
Resistance	20 kOhms
Tolerance	±1%
Power Rating	0.1W (1/10W)
Package	0805 (2012 Metric)
Composition	Thin Film
Temperature Coefficient	±50ppm/°C
Operating Temperature Range	-55°C to 155°C
Moisture Resistance	Yes
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following mandatory parameters:

Critical Parameters (Must Match):

Resistance value: 20 kOhms
Package type: 0805 (2012 Metric)
Composition: Thin Film
Temperature coefficient: ±50ppm/°C
Operating temperature range: -55°C to 155°C
RoHS3 compliance
MSL rating: 1 (Unlimited)

Allowable Variations:

Tolerance: ±1% or tighter (±0.5%, ±0.1%)
Power rating: Equal to or greater than 0.1W (0.125W, 0.63W acceptable)
Manufacturer: Different manufacturers permitted
Features: Additional features (automotive AEC-Q200, anti-sulfur, current sense) permitted
Product status: Active preferred over obsolete

Substitute parts are grouped into three categories:

Direct Substitutes (Same Tolerance & Power): Parts with ±1% tolerance and 0.1W or 0.125W power rating that provide direct functional replacement.

Tolerance Upgrades: Parts with tighter tolerance specifications (±0.5%, ±0.1%) maintaining the same or higher power rating, suitable for applications requiring improved accuracy.

Power Upgrades: Parts with higher power ratings (0.63W) maintaining tolerance specifications, suitable for applications with increased thermal requirements.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Temp Range	Features	Status
RN732ATTD2002F50	KOA Speer	20k	±1%	0.1	0805	±50ppm/°C	-55 to 155°C	Moisture Resistant	Obsolete
RN73R2ATTD2002F50	KOA Speer	20k	±1%	0.125	0805	±50ppm/°C	-55 to 155°C	Automotive AEC-Q200, Moisture Resistant	Active
RT0805FRE0720KL	YAGEO	20k	±1%	0.125	0805	±50ppm/°C	-55 to 155°C	Thin Film	Active
AT0805BRE0720KL	YAGEO	20k	±0.1%	0.125	0805	±50ppm/°C	-55 to 155°C	Anti-Sulfur, Automotive AEC-Q200, Moisture Resistant	Active
AT0805DRE0720KL	YAGEO	20k	±0.5%	0.125	0805	±50ppm/°C	-55 to 155°C	Anti-Sulfur, Automotive AEC-Q200, Moisture Resistant	Active
CRT0805-DZ-2002ELF	Bourns Inc.	20k	±0.5%	0.125	0805	±50ppm/°C	-55 to 155°C	Current Sense	Active
MCU08050C2002DP500	Vishay Beyschlag	20k	±0.5%	0.125	0805	±50ppm/°C	-55 to 155°C	Anti-Sulfur	Active
MCU08050C2002FP500	Vishay Beyschlag	20k	±1%	0.125	0805	±50ppm/°C	-55 to 155°C	Anti-Sulfur	Active
MCU08050C2002FPW00	Vishay Beyschlag	20k	±1%	0.125	0805	±50ppm/°C	-55 to 155°C	Anti-Sulfur	Active
PHP00805H2002BBT1	Vishay Dale	20k	±0.1%	0.63	0805	±50ppm/°C	-55 to 155°C	Flame Proof, Moisture Resistant, Safety	Active
PHP00805H2002BST1	Vishay Dale	20k	±0.1%	0.63	0805	±50ppm/°C	-55 to 155°C	Flame Proof, Moisture Resistant, Safety	Active

Engineering Selection Recommendations

Primary Direct Substitute: RN73R2ATTD2002F50 (KOA Speer) is the recommended primary substitute. This part maintains identical electrical specifications (20 kOhms ±1%, ±50ppm/°C, -55°C to 155°C) with increased power rating (0.125W vs. 0.1W) and active product status. Automotive AEC-Q200 qualification provides additional reliability assurance for demanding applications.

Secondary Direct Substitute: MCU08050C2002FP500 or MCU08050C2002FPW00 (Vishay Beyschlag) provide equivalent functionality with ±1% tolerance and 0.125W power rating. These parts feature anti-sulfur construction and active status. MCU08050C2002FPW00 is functionally identical to MCU08050C2002FP500 with alternative packaging designation.

Tolerance Upgrade Options: AT0805BRE0720KL (YAGEO, ±0.1%) and AT0805DRE0720KL (YAGEO, ±0.5%) offer improved tolerance specifications suitable for precision applications. Both include automotive AEC-Q200 qualification and anti-sulfur features. CRT0805-DZ-2002ELF (Bourns, ±0.5%) provides current sense capability for specialized measurement applications.

Power Upgrade Option: PHP00805H2002BST1 (Vishay Dale, 0.63W, ±0.1%) is suitable for applications requiring higher power dissipation with superior tolerance. ROHS3 compliance and flame-proof construction support safety-critical applications. PHP00805H2002BBT1 provides identical electrical specifications with RoHS non-compliant status.

Selection Criteria:

Standard applications: RN73R2ATTD2002F50 or RT0805FRE0720KL
Automotive applications: AT0805BRE0720KL or AT0805DRE0720KL
Precision applications: AT0805BRE0720KL (±0.1%)
High-power applications: PHP00805H2002BST1
Current sensing: CRT0805-DZ-2002ELF

Frequently Asked Questions (FAQ)

Q: Can RN732ATTD2002F50 be directly replaced with RN73R2ATTD2002F50?

A: Yes. Both parts share identical resistance (20 kOhms), tolerance (±1%), temperature coefficient (±50ppm/°C), operating range (-55°C to 155°C), and package (0805). RN73R2ATTD2002F50 has higher power rating (0.125W vs. 0.1W), which is compatible with the original specification. RN73R2ATTD2002F50 is active status with automotive qualification.

Q: What is the difference between tolerance grades ±1%, ±0.5%, and ±0.1%?

A: Tolerance specifies the maximum deviation from the nominal 20 kOhm value. ±1% allows ±200 ohms deviation (19.8k to 20.2k ohms). ±0.5% allows ±100 ohms (19.9k to 20.1k ohms). ±0.1% allows ±20 ohms (19.98k to 20.02k ohms). Tighter tolerances are suitable for precision analog circuits, filters, and measurement applications.

Q: Are all substitute parts ROHS3 compliant?

A: All substitute parts listed are ROHS3 compliant except PHP00805H2002BBT1, which is RoHS non-compliant. PHP00805H2002BST1 is the ROHS3-compliant variant of the same part.

Q: Can I use a 0.125W part where 0.1W is specified?

A: Yes. Power rating specifies maximum dissipation capability. A 0.125W part can safely operate in applications designed for 0.1W. The actual power dissipation is determined by circuit conditions, not component rating. Higher power rating provides thermal margin.

Q: What does AEC-Q200 qualification mean?

A: AEC-Q200 is an automotive industry standard qualification for passive components. It certifies the part meets automotive reliability, temperature cycling, and environmental stress requirements. Parts with AEC-Q200 are suitable for automotive and high-reliability applications.

Q: Are MCU08050C2002FP500 and MCU08050C2002FPW00 interchangeable?

A: Yes. Both parts have identical electrical specifications (20 kOhms ±1%, 0.125W, ±50ppm/°C, -55°C to 155°C). The designation difference reflects packaging or tape configuration variants. Verify packaging requirements with your procurement specification.

Q: What is the significance of anti-sulfur and flame-proof features?

A: Anti-sulfur construction protects against sulfur-containing environmental contaminants that can degrade resistor performance. Flame-proof construction prevents component ignition in fault conditions. These features are beneficial for harsh environments and safety-critical applications but are not required for standard industrial use.

Q: Can I substitute a current sense resistor (CRT0805-DZ-2002ELF) in a general-purpose application?

A: Yes. Current sense resistors meet all electrical specifications for general-purpose use. The current sense designation indicates optimized performance for current measurement circuits but does not restrict use in other applications.

Q: What is MSL rating and why is it important?

A: MSL (Moisture Sensitivity Level) rating indicates moisture absorption characteristics. MSL 1 (Unlimited) means the component has unlimited shelf life and requires no special moisture control during storage or handling. All listed parts have MSL 1 rating.

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