RN732ATTD4023B50 Equivalent & Substitute Parts

Part Overview

The RN732ATTD4023B50 is a 402 kOhms ±0.1% 0.1W (1/10W) chip resistor in 0805 (2012 Metric) package manufactured by KOA Speer Electronics, Inc. This thin film, moisture-resistant component operates across -55°C to 155°C with a temperature coefficient of ±50ppm/°C. The part is currently obsolete, necessitating identification of equivalent and substitute components that maintain electrical and mechanical compatibility while offering active product status and improved availability.

Key Parameters

Parameter	Value
Resistance	402 kOhms
Tolerance	±0.1%
Power Rating	0.1W (1/10W)
Package / Case	0805 (2012 Metric)
Composition	Thin Film
Operating Temperature Range	-55°C ~ 155°C
Temperature Coefficient	±50ppm/°C
Moisture Sensitivity Level	1 (Unlimited)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the RN732ATTD4023B50 is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters (Must Match):

Resistance value: 402 kOhms
Tolerance: ±0.1%
Package / Case: 0805 (2012 Metric)
Composition: Thin Film
Operating Temperature Range: -55°C ~ 155°C
Moisture Sensitivity Level: 1 (Unlimited)

Allowable Variations:

Power rating may be equal to or greater than 0.1W (1/10W)
Temperature coefficient may be equal to or lower (tighter) than ±50ppm/°C
Additional features (automotive qualification, anti-sulfur, current sense) are permissible
Compliance certifications (RoHS3, REACH) must be maintained or improved

Substitute parts are grouped into two categories:

Direct Substitutes (Same Power Rating - 0.1W/1/10W):

7-1879357-1 (TE Connectivity Passive Product)
CPF0805B402KE1 (TE Connectivity Passive Product)

Upgraded Substitutes (Higher Power Rating - 0.125W/1/8W or Greater):

RN73R2ATTD4023B50 (KOA Speer Electronics, Inc.)
RT0805BRE07402KL (YAGEO)
AT0805BRD07402KL (YAGEO)
CRT0805-BY-4023ELF (Bourns Inc.)
ERA-6AEB4023V (Panasonic Electronic Components)
RG2012N-4023-B-T5 (Susumu)

Premium Upgraded Substitute (Higher Power Rating - 0.25W/1/4W or Greater):

5-2176094-1 (TE Connectivity Passive Product)
PHP00805E4023BBT1 (Vishay Dale Thin Film)

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (Watts)	Temp Coeff (ppm/°C)	Operating Temp (°C)	Package	Product Status	RoHS Status
RN732ATTD4023B50	KOA Speer Electronics, Inc.	402 kOhms	±0.1%	0.1	±50	-55 ~ 155	0805	Obsolete	ROHS3 Compliant
RN73R2ATTD4023B50	KOA Speer Electronics, Inc.	402 kOhms	±0.1%	0.125	±50	-55 ~ 155	0805	Active	ROHS3 Compliant
RT0805BRE07402KL	YAGEO	402 kOhms	±0.1%	0.125	±50	-55 ~ 155	0805	Active	ROHS3 Compliant
5-2176094-1	TE Connectivity Passive Product	402 kOhms	±0.1%	0.25	±25	-55 ~ 155	0805	Active	ROHS3 Compliant
7-1879357-1	TE Connectivity Passive Product	402 kOhms	±0.1%	0.1	±10	-55 ~ 155	0805	Active	Not applicable
AT0805BRD07402KL	YAGEO	402 kOhms	±0.1%	0.125	±25	-55 ~ 155	0805	Active	ROHS3 Compliant
CPF0805B402KE1	TE Connectivity Passive Product	402 kOhms	±0.1%	0.1	±25	-55 ~ 155	0805	Active	ROHS3 Compliant
CRT0805-BY-4023ELF	Bourns Inc.	402 kOhms	±0.1%	0.125	±25	-55 ~ 155	0805	Active	ROHS3 Compliant
ERA-6AEB4023V	Panasonic Electronic Components	402 kOhms	±0.1%	0.125	±25	-55 ~ 155	0805	Active	ROHS3 Compliant
PHP00805E4023BBT1	Vishay Dale Thin Film	402 kOhms	±0.1%	0.63	±25	-55 ~ 155	0805	Active	RoHS non-compliant
RG2012N-4023-B-T5	Susumu	402 kOhms	±0.1%	0.125	±10	-55 ~ 155	0805	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Same Power Rating):

CPF0805B402KE1 (TE Connectivity Passive Product) is the preferred direct substitute. It maintains the 0.1W power rating, operates across the identical temperature range, and holds active product status with ROHS3 compliance. The tighter temperature coefficient (±25ppm/°C versus ±50ppm/°C) provides improved stability without introducing incompatibility.

7-1879357-1 (TE Connectivity Passive Product) offers equivalent electrical performance with superior temperature coefficient (±10ppm/°C) and active status. However, RoHS status is listed as "Not applicable," requiring verification for applications with strict compliance requirements.

For Upgraded Substitution (Higher Power Rating):

When thermal margin or power dissipation requirements permit higher power ratings, the following active components provide enhanced reliability:

RN73R2ATTD4023B50 (KOA Speer Electronics, Inc.) maintains the same manufacturer lineage as the original part with 0.125W rating, automotive AEC-Q200 qualification, and ROHS3 compliance.

AT0805BRD07402KL (YAGEO) combines 0.125W rating with automotive AEC-Q200 qualification, anti-sulfur protection, and improved temperature coefficient (±25ppm/°C). ROHS3 compliant.

ERA-6AEB4023V (Panasonic Electronic Components) provides 0.125W rating with automotive AEC-Q200 qualification and ROHS3 compliance. High inventory availability (14,504 pcs).

RG2012N-4023-B-T5 (Susumu) offers 0.125W rating with automotive AEC-Q200 qualification, anti-sulfur features, and superior temperature coefficient (±10ppm/°C). ROHS3 compliant.

For Premium Upgraded Substitution (Significantly Higher Power Rating):

5-2176094-1 (TE Connectivity Passive Product) provides 0.25W rating with improved temperature coefficient (±25ppm/°C) and ROHS3 compliance for applications requiring substantial thermal headroom.

PHP00805E4023BBT1 (Vishay Dale Thin Film) delivers 0.63W rating with flame-proof and safety certifications. Note: RoHS non-compliant status restricts use in regulated applications.

Compliance Considerations:

All recommended substitutes maintain ROHS3 compliance except PHP00805E4023BBT1 and 7-1879357-1. REACH status is "REACH Unaffected" for all primary recommendations. Applications requiring strict RoHS3 compliance should exclude PHP00805E4023BBT1.

Frequently Asked Questions (FAQ)

Q: Can I use a higher power-rated resistor as a substitute for the RN732ATTD4023B50?

A: Yes. Higher power ratings (0.125W, 0.25W, or greater) are acceptable substitutes provided all other parameters remain constant: 402 kOhms resistance, ±0.1% tolerance, 0805 package, thin film composition, -55°C to 155°C operating range, and MSL 1. Higher power ratings provide additional thermal margin without affecting electrical function.

Q: What is the significance of temperature coefficient in resistor substitution?

A: Temperature coefficient indicates resistance drift over temperature. The original part specifies ±50ppm/°C. Substitutes with equal or tighter (lower) temperature coefficients are acceptable. For example, ±25ppm/°C or ±10ppm/°C substitutes provide improved stability. Tighter coefficients do not compromise compatibility.

Q: Are automotive-qualified substitutes (AEC-Q200) compatible with non-automotive applications?

A: Yes. Automotive-qualified components meet or exceed general industrial specifications. AEC-Q200 rated substitutes such as RN73R2ATTD4023B50, AT0805BRD07402KL, ERA-6AEB4023V, and RG2012N-4023-B-T5 are fully compatible with non-automotive applications and provide enhanced reliability margins.

Q: Does the 0805 package dimension vary between manufacturers?

A: The 0805 (2012 Metric) package is standardized at 0.079" L x 0.049" W (2.00mm x 1.25mm). Seated height may vary slightly (0.024" to 0.026" maximum). All listed substitutes conform to 0805 package specifications and are mechanically interchangeable on standard PCB layouts.

Q: What is Moisture Sensitivity Level (MSL) 1, and why is it important?

A: MSL 1 indicates unlimited shelf life without moisture-related degradation. All listed substitutes maintain MSL 1, ensuring no special storage or handling requirements and full compatibility with standard manufacturing processes.

Q: Can I substitute a part with a different temperature coefficient if my application operates within a narrow temperature range?

A: Yes, provided your application temperature range remains within the component's operating specification (-55°C to 155°C). However, substitution decisions should be based on the parameters provided in the datasheet. Tighter temperature coefficients (lower ppm/°C values) are always acceptable and provide improved performance.

Q: Why is RoHS compliance important for resistor selection?

A: ROHS3 compliance ensures the component contains no restricted substances (lead, cadmium, mercury, etc.). For applications subject to EU regulations or customer requirements, ROHS3 compliant substitutes are mandatory. All primary recommendations maintain ROHS3 compliance except PHP00805E4023BBT1.

Q: What does "Thin Film" composition mean, and are all substitutes thin film?

A: Thin film resistors are manufactured by depositing a resistive material on a ceramic substrate, providing superior tolerance (±0.1%), temperature stability, and frequency response compared to thick film alternatives. All listed substitutes are thin film composition, maintaining electrical equivalence with the original part.

Q: Is there a performance difference between KOA Speer, YAGEO, Panasonic, and other manufacturers listed?

A: All listed manufacturers produce components meeting identical electrical specifications (402 kOhms ±0.1%, 0805 package, thin film). Differences exist in temperature coefficient, power rating, and optional features (automotive qualification, anti-sulfur). Selection should prioritize application requirements and compliance certifications rather than manufacturer preference.

Q: Can I use CPF0805B402KE1 or 7-1879357-1 as direct drop-in replacements?

A: Yes. Both maintain the 0.1W power rating and are electrically equivalent. CPF0805B402KE1 is recommended for applications requiring ROHS3 compliance. 7-1879357-1 offers superior temperature coefficient (±10ppm/°C) but has undefined RoHS status, requiring verification for regulated applications.

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