RN731ETTP5902F50 Equivalent & Substitute Parts

Part Overview

The RN731ETTP5902F50 is a 59 kOhms ±1% thin film chip resistor in 0402 (1005 Metric) package rated at 0.063W (1/16W) power dissipation. Manufactured by KOA Speer Electronics, Inc., this component is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary to ensure design continuity and procurement availability for new production runs and field replacements.

Key Parameters

Parameter	Value
Resistance	59 kOhms
Tolerance	±1%
Power Rating	0.063W (1/16W)
Package	0402 (1005 Metric)
Composition	Thin Film
Temperature Coefficient	±50ppm/°C
Operating Temperature Range	-55°C to 155°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence in the following parameters:

Resistance value: 59 kOhms (exact match required)
Package: 0402 (1005 Metric) (exact match required)
Composition: Thin Film (exact match required)
Temperature Coefficient: ±50ppm/°C (exact match required)
Operating Temperature Range: -55°C to 155°C (exact match required)
RoHS Status: ROHS3 Compliant (exact match required)
Moisture Sensitivity Level: 1 (Unlimited) (exact match required)

Tolerance and power rating variations are permitted within the following constraints:

Tolerance may be equal to or tighter than ±1% (±1%, ±0.5%, ±0.25%, ±0.1% are acceptable)
Power rating may be equal to or greater than 0.063W (0.063W or 0.1W are acceptable)

Substitute parts are categorized as direct equivalents or upgrades based on tolerance and power specifications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Composition	Temp Coeff	Op Temp Range	Status	RoHS	MSL
RN731ETTP5902F50	KOA Speer	59k	±1%	0.063	0402	Thin Film	±50ppm/°C	-55 to 155°C	Obsolete	ROHS3	1
RN73R1ETTP5902F50	KOA Speer	59k	±1%	0.063	0402	Thin Film	±50ppm/°C	-55 to 155°C	Active	ROHS3	1
RT0402FRE0759KL	YAGEO	59k	±1%	0.063	0402	Thin Film	±50ppm/°C	-55 to 155°C	Active	ROHS3	1
AT0402BRE0759KL	YAGEO	59k	±0.1%	0.063	0402	Thin Film	±50ppm/°C	-55 to 155°C	Active	ROHS3	1
AT0402DRE0759KL	YAGEO	59k	±0.5%	0.063	0402	Thin Film	±50ppm/°C	-55 to 155°C	Active	ROHS3	1
MCS04020C5902FE000	Vishay Beyschlag	59k	±1%	0.063	0402	Thin Film	±50ppm/°C	-55 to 155°C	Active	ROHS3	1
RNCF0402BTC59K0	Stackpole Electronics	59k	±0.1%	0.1	0402	Thin Film	±50ppm/°C	-55 to 155°C	Active	ROHS3	1
RNCF0402DTC59K0	Stackpole Electronics	59k	±0.5%	0.1	0402	Thin Film	±50ppm/°C	-55 to 155°C	Active	ROHS3	1
RT0402BRE0759KL	YAGEO	59k	±0.1%	0.063	0402	Thin Film	±50ppm/°C	-55 to 155°C	Active	ROHS3	1
RT0402CRE0759KL	YAGEO	59k	±0.25%	0.063	0402	Thin Film	±50ppm/°C	-55 to 155°C	Active	ROHS3	1
RT0402DRE0759KL	YAGEO	59k	±0.5%	0.063	0402	Thin Film	±50ppm/°C	-55 to 155°C	Active	ROHS3	1

Engineering Selection Recommendations

Direct Equivalent (Same Tolerance & Power):

RN73R1ETTP5902F50 (KOA Speer) — Active status replacement from original manufacturer with automotive AEC-Q200 qualification
RT0402FRE0759KL (YAGEO) — Active status direct equivalent with highest inventory availability
MCS04020C5902FE000 (Vishay Beyschlag) — Active status professional-grade equivalent with anti-sulfur feature

Upgrade Options (Tighter Tolerance):

RT0402BRE0759KL (YAGEO) — ±0.1% tolerance upgrade, same power rating
RT0402CRE0759KL (YAGEO) — ±0.25% tolerance upgrade, same power rating
AT0402BRE0759KL (YAGEO) — ±0.1% tolerance with automotive AEC-Q200 qualification and anti-sulfur feature
AT0402DRE0759KL (YAGEO) — ±0.5% tolerance with automotive AEC-Q200 qualification and anti-sulfur feature

Upgrade Options (Higher Power Rating):

RNCF0402BTC59K0 (Stackpole Electronics) — ±0.1% tolerance with 0.1W power rating and automotive AEC-Q200 qualification
RNCF0402DTC59K0 (Stackpole Electronics) — ±0.5% tolerance with 0.1W power rating and automotive AEC-Q200 qualification

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and identical operating temperature range (-55°C to 155°C).

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with tighter tolerance than the original ±1%? A: Yes. Tighter tolerance specifications (±0.5%, ±0.25%, ±0.1%) are functionally compatible and provide improved accuracy. The circuit design must accommodate the original tolerance specification; tighter tolerances do not create incompatibility.

Q: What is the difference between 0.063W and 0.1W power ratings? A: The 0.1W (1/10W) rating provides higher power dissipation capability than 0.063W (1/16W). Parts with 0.1W rating are compatible replacements for 0.063W applications, as they can safely handle the same or greater thermal load.

Q: Are automotive AEC-Q200 qualified parts suitable for non-automotive applications? A: Yes. Automotive AEC-Q200 qualification indicates enhanced reliability testing and quality standards. These parts are fully compatible with non-automotive designs and provide additional assurance of component quality.

Q: Does the anti-sulfur feature affect compatibility? A: No. Anti-sulfur treatment is an additional protective feature that does not impact electrical performance or mechanical compatibility. It provides enhanced environmental resistance in corrosive atmospheres.

Q: Can I substitute between different manufacturers? A: Yes, provided all electrical and mechanical parameters match exactly. YAGEO, Vishay Beyschlag, Stackpole Electronics, and KOA Speer all manufacture equivalent 59 kOhms 0402 thin film resistors with identical specifications.

Q: What is Moisture Sensitivity Level (MSL) 1? A: MSL 1 indicates unlimited shelf life without moisture baking requirements. All listed substitute parts carry MSL 1 rating, ensuring identical moisture handling procedures.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the original part's environmental and regulatory status.

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