RN732ATTD4022A05 Equivalent & Substitute Parts

Part Overview

The RN732ATTD4022A05 is a 40.2 kOhms ±0.05% thin film chip resistor manufactured by KOA Speer Electronics, Inc., rated at 0.1W (1/10W) in 0805 (2012 Metric) package format. This component features moisture-resistant construction with a temperature coefficient of ±5ppm/°C and operates across -55°C to 155°C. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives that maintain electrical and mechanical compatibility while offering active product status and enhanced specifications where applicable.

Key Parameters

Parameter	Value
Resistance	40.2 kOhms
Tolerance	±0.05%
Power Rating	0.1W (1/10W)
Package / Case	0805 (2012 Metric)
Composition	Thin Film
Temperature Coefficient	±5ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Moisture Sensitivity Level	1 (Unlimited)
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict adherence to the following core parameters:

Mandatory Compatibility Criteria:

Resistance value: 40.2 kOhms (exact match required)
Package / Case: 0805 (2012 Metric) (exact match required)
Composition: Thin Film (exact match required)
Temperature Coefficient: ±5ppm/°C (exact match required)
Moisture Sensitivity Level: 1 (Unlimited) (exact match required)

Allowable Variation Parameters:

Tolerance: Equal to or tighter than ±0.05%
Power Rating: Equal to or greater than 0.1W
Operating Temperature Range: Must encompass or extend the original -55°C to 155°C range
RoHS Status: ROHS3 Compliant or equivalent
Product Status: Active preferred for long-term availability

All identified substitute parts meet the mandatory compatibility criteria. Variations in tolerance, power rating, and operating temperature represent upgrades or equivalent specifications suitable for direct replacement in applications designed for the RN732ATTD4022A05.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff	Temp Range (°C)	Package	Product Status	RoHS
RN732ATTD4022A05	KOA Speer Electronics	40.2 kΩ	±0.05%	0.1	±5ppm/°C	-55 ~ 155	0805	Obsolete	ROHS3
RN73R2ATTD4022A05	KOA Speer Electronics	40.2 kΩ	±0.05%	0.125	±5ppm/°C	-55 ~ 155	0805	Active	ROHS3
PLT0805Z4022LBTS	Vishay Dale Thin Film	40.2 kΩ	±0.01%	0.25	±5ppm/°C	-55 ~ 125	0805	Active	Non-compliant
PLTT0805Z4022AGT5	Vishay Dale Thin Film	40.2 kΩ	±0.05%	0.25	±5ppm/°C	-55 ~ 215	0805	Active	ROHS3
PLTT0805Z4022QGT5	Vishay Dale Thin Film	40.2 kΩ	±0.02%	0.25	±5ppm/°C	-55 ~ 215	0805	Active	ROHS3
TNPU080540K2AZEN00	Vishay Dale	40.2 kΩ	±0.05%	0.125	±5ppm/°C	-55 ~ 125	0805	Active	ROHS3

Engineering Selection Recommendations

Direct Equivalent (Same Specifications, Active Status):

RN73R2ATTD4022A05 is the primary direct substitute. Manufactured by KOA Speer Electronics, this part maintains identical electrical specifications (40.2 kΩ ±0.05%, ±5ppm/°C) and package format while offering increased power rating (0.125W vs. 0.1W) and active product status. It includes automotive AEC-Q200 qualification, providing enhanced reliability documentation. ROHS3 compliance is maintained. This part is recommended for applications requiring minimal specification change with maximum compatibility assurance.

Upgraded Alternatives (Enhanced Specifications, Active Status):

PLTT0805Z4022AGT5 provides identical tolerance (±0.05%) with doubled power rating (0.25W) and extended operating temperature range (-55°C to 215°C vs. -55°C to 155°C). ROHS3 compliant. Suitable for applications requiring thermal margin or higher power dissipation capability.

PLTT0805Z4022QGT5 offers tighter tolerance (±0.02% vs. ±0.05%), doubled power rating (0.25W), and extended temperature range (-55°C to 215°C). ROHS3 compliant. Recommended for precision measurement or signal conditioning circuits requiring superior accuracy.

TNPU080540K2AZEN00 maintains tolerance (±0.05%) and power rating (0.125W) with automotive AEC-Q200 qualification and anti-sulfur construction. Operating temperature limited to -55°C to 125°C. ROHS3 compliant. Suitable for automotive applications requiring corrosion resistance.

Conditional Selection:

PLT0805Z4022LBTS offers superior tolerance (±0.01%) and highest power rating (0.25W) but is RoHS non-compliant and has reduced operating temperature range (-55°C to 125°C). Selection requires verification of RoHS requirement exemption in target application.

Frequently Asked Questions (FAQ)

Q: Can RN73R2ATTD4022A05 directly replace RN732ATTD4022A05 without circuit modification?

A: Yes. Both parts share identical resistance (40.2 kΩ), tolerance (±0.05%), temperature coefficient (±5ppm/°C), and package format (0805). The increased power rating (0.125W vs. 0.1W) is a non-breaking upgrade that does not require circuit changes.

Q: What is the primary difference between KOA Speer and Vishay Dale substitute options?

A: KOA Speer RN73R2ATTD4022A05 maintains closest specification alignment with identical tolerance and temperature range. Vishay Dale PLTT series parts offer enhanced power ratings (0.25W) and extended temperature ranges (-55°C to 215°C) at the cost of slightly different physical dimensions (0.033" height vs. 0.024" for KOA part).

Q: Are all substitute parts ROHS3 compliant?

A: Five of six substitute parts are ROHS3 compliant. PLT0805Z4022LBTS is RoHS non-compliant and requires specific exemption verification before use in regulated applications.

Q: Which substitute part is recommended for automotive applications?

A: Both RN73R2ATTD4022A05 and TNPU080540K2AZEN00 carry AEC-Q200 automotive qualification. RN73R2ATTD4022A05 is preferred due to extended operating temperature range (-55°C to 155°C vs. -55°C to 125°C) and identical tolerance specification.

Q: Can PLTT0805Z4022QGT5 be used in place of RN732ATTD4022A05 in precision applications?

A: Yes. The tighter tolerance (±0.02% vs. ±0.05%) represents an upgrade suitable for precision measurement circuits. The 0805 package and ±5ppm/°C temperature coefficient ensure mechanical and thermal compatibility. Extended temperature range (-55°C to 215°C) provides additional operational margin.

Q: What is the impact of physical dimension differences between substitute parts?

A: KOA Speer parts (RN732ATTD4022A05, RN73R2ATTD4022A05) measure 0.024" maximum seated height. Vishay Dale PLTT series parts measure 0.033" maximum seated height. TNPU080540K2AZEN00 measures 0.022" maximum seated height. These variations are within standard 0805 package tolerance and do not affect PCB layout compatibility for standard surface-mount assembly processes.

Q: Is moisture sensitivity level identical across all substitute parts?

A: Yes. All parts, including the original RN732ATTD4022A05, maintain MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions for storage or handling.

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