Equivalent & Substitute Parts for RN732ATTD4022F100

Part Overview

The RN732ATTD4022F100 is a 40.2 kOhms ±1% thin film chip resistor manufactured by KOA Speer Electronics, Inc., rated at 0.1W (1/10W) in 0805 (2012 Metric) package. This part is classified as Obsolete, necessitating identification of equivalent and substitute components for ongoing design support and procurement continuity. The part is ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Key Parameters

Parameter	Value
Resistance	40.2 kOhms
Tolerance	±1%
Power Rating	0.1W (1/10W)
Package / Case	0805 (2012 Metric)
Composition	Thin Film
Temperature Coefficient	±100ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the RN732ATTD4022F100 is determined by the following critical parameters:

Mandatory Matching Parameters:

Resistance value: 40.2 kOhms
Tolerance: ±1%
Package: 0805 (2012 Metric)
Composition: Thin Film
Operating temperature range: -55°C ~ 155°C (minimum requirement)

Allowable Variations:

Power rating: Substitutes with equal or higher power ratings are acceptable (0.1W, 0.125W, 0.25W, 0.26W)
Temperature coefficient: Substitutes with equal or lower absolute values are acceptable (±25ppm/°C, ±50ppm/°C, ±100ppm/°C)
Features: Additional features (Automotive AEC-Q200, Anti-Sulfur, Moisture Resistant, Military) do not prevent substitution
Manufacturer: Different manufacturers are acceptable provided all electrical and mechanical parameters align

Substitute parts are grouped into two categories:

Direct Manufacturer Substitute: RN73R2ATTD4022F100 (KOA Speer Electronics, Inc. - same manufacturer, Active status)

Upgrade Substitutes: Parts with enhanced specifications including higher power ratings, improved temperature coefficients, or additional certifications (Automotive AEC-Q200, Anti-Sulfur, Military ratings).

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Temp Range (°C)	Status	Features
RN732ATTD4022F100	KOA Speer	40.2k	±1%	0.1	±100	-55 ~ 155	Obsolete	Moisture Resistant
RN73R2ATTD4022F100	KOA Speer	40.2k	±1%	0.125	±100	-55 ~ 155	Active	Automotive AEC-Q200, Moisture Resistant
MCU08050C4022FP500	Vishay Beyschlag	40.2k	±1%	0.125	±50	-55 ~ 155	Active	Anti-Sulfur
RNCF0805FTC40K2	Stackpole Electronics	40.2k	±1%	0.25	±50	-55 ~ 155	Active	Automotive AEC-Q200
RNCP0805FTD40K2	Stackpole Electronics	40.2k	±1%	0.25	±100	-55 ~ 155	Active	Anti-Sulfur
RT0805FRD0740K2L	YAGEO	40.2k	±1%	0.125	±25	-55 ~ 155	Active	None
RT0805FRE0740K2L	YAGEO	40.2k	±1%	0.125	±50	-55 ~ 155	Active	None
TNPW080540K2FEEA	Vishay Dale	40.2k	±1%	0.26	±25	-55 ~ 175	Active	Anti-Sulfur, Automotive AEC-Q200, Moisture Resistant
TNPW080540K2FETA	Vishay Dale	40.2k	±1%	0.125	±25	-55 ~ 125	Active	Military
TNPW080540K2FHEA	Vishay Dale	40.2k	±1%	0.26	±50	-55 ~ 175	Active	Anti-Sulfur, Automotive AEC-Q200, Moisture Resistant
TNPW080540K2FHTA	Vishay Dale	40.2k	±1%	0.125	±50	-55 ~ 125	Active	Military

Engineering Selection Recommendations

For Direct Replacement (Same Manufacturer, Active Status): RN73R2ATTD4022F100 is the primary recommendation. This part maintains KOA Speer Electronics manufacturing continuity, offers identical electrical specifications, and is currently in Active production status. The increased power rating (0.125W vs. 0.1W) provides additional thermal margin without affecting circuit performance. Automotive AEC-Q200 certification adds quality assurance for demanding applications.

For Enhanced Specifications (Higher Power Rating): RNCF0805FTC40K2, RNCP0805FTD40K2, TNPW080540K2FEEA, and TNPW080540K2FHEA offer 0.25W or 0.26W power ratings. These are suitable for applications requiring improved thermal performance or higher power dissipation margins. TNPW080540K2FEEA and TNPW080540K2FHEA extend the operating temperature range to 175°C.

For Improved Temperature Coefficient (Lower Absolute Value): RT0805FRD0740K2L (±25ppm/°C), MCU08050C4022FP500 (±50ppm/°C), and YAGEO RT0805FRE0740K2L (±50ppm/°C) provide superior temperature stability compared to the original ±100ppm/°C specification.

For Automotive Applications: RN73R2ATTD4022F100, RNCF0805FTC40K2, TNPW080540K2FEEA, and TNPW080540K2FHEA carry Automotive AEC-Q200 certification.

For Military Applications: TNPW080540K2FETA and TNPW080540K2FHTA are designated Military-grade components. Note: TNPW080540K2FETA and TNPW080540K2FHTA are RoHS non-compliant and REACH Affected.

For Corrosive Environment Applications: MCU08050C4022FP500, RNCP0805FTD40K2, TNPW080540K2FEEA, and TNPW080540K2FHEA feature Anti-Sulfur protection.

All substitute parts maintain ROHS3 compliance (except military variants), MSL 1 rating, and 0805 package compatibility.

Frequently Asked Questions (FAQ)

Q1: Can I use a substitute part with higher power rating than the original RN732ATTD4022F100?

A: Yes. Substitutes with equal or higher power ratings (0.125W, 0.25W, 0.26W) are electrically compatible. Higher power ratings provide additional thermal margin and do not negatively affect circuit operation. The 0805 package dimensions remain identical across all listed substitutes.

Q2: What is the significance of the temperature coefficient difference between the original part (±100ppm/°C) and some substitutes (±25ppm/°C or ±50ppm/°C)?

A: Temperature coefficient indicates resistance value drift with temperature change. Lower absolute values (±25ppm/°C) represent superior stability. For applications with tight tolerance requirements or wide temperature operation, substitutes with lower temperature coefficients provide improved performance. For general applications, the difference is negligible.

Q3: Are all substitute parts available in the same 0805 package?

A: Yes. All listed substitute parts use the 0805 (2012 Metric) package with identical footprint dimensions (0.079" L x 0.049" W / 2.00mm x 1.25mm). Height variations are minimal (0.022" to 0.026" seated height), within standard PCB assembly tolerances.

Q4: Which substitute should I select for automotive applications?

A: For automotive use, select parts with Automotive AEC-Q200 certification: RN73R2ATTD4022F100, RNCF0805FTC40K2, TNPW080540K2FEEA, or TNPW080540K2FHEA. These parts meet automotive quality and reliability standards.

Q5: What is the difference between TNPW080540K2FEEA and TNPW080540K2FHEA?

A: Both parts are identical except for temperature coefficient: TNPW080540K2FEEA has ±25ppm/°C while TNPW080540K2FHEA has ±50ppm/°C. Both offer 0.26W power rating, Anti-Sulfur protection, Automotive AEC-Q200 certification, and extended temperature range (-55°C ~ 175°C). Select based on required temperature stability.

Q6: Can I use military-grade substitutes (TNPW080540K2FETA or TNPW080540K2FHTA) in commercial applications?

A: Yes, military-grade components are suitable for commercial use. However, these parts are RoHS non-compliant and REACH Affected, which may conflict with regulatory requirements in certain markets or applications. Verify compliance requirements before selection.

Q7: Why is the original RN732ATTD4022F100 marked as Obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The direct manufacturer substitute RN73R2ATTD4022F100 from KOA Speer Electronics provides continuity with improved specifications and Active production status.

Q8: Are all substitute parts ROHS3 compliant?

A: Most substitutes are ROHS3 compliant. Exceptions are TNPW080540K2FETA and TNPW080540K2FHTA (military variants), which are RoHS non-compliant. Verify compliance requirements for your application before selection.

Q9: What does MSL 1 (Unlimited) moisture sensitivity rating mean?

A: MSL 1 indicates the lowest moisture sensitivity level. These components can be stored indefinitely without special moisture control measures and do not require baking before soldering. All listed parts maintain MSL 1 rating.

Q10: Can I substitute RT0805FRD0740K2L with RT0805FRE0740K2L?

A: Yes. Both are YAGEO RT series 40.2k ±1% 0.125W 0805 resistors. The primary difference is temperature coefficient: RT0805FRD0740K2L has ±25ppm/°C while RT0805FRE0740K2L has ±50ppm/°C. Selection depends on required temperature stability. RT0805FRE0740K2L has higher inventory availability (10,675 pcs vs. 710 pcs).

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