RN731ETTP1502F50 Equivalent & Substitute Parts

Part Overview

The RN731ETTP1502F50 is a 15 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 supply chain reliability for new production runs and long-term availability.

Key Parameters

Parameter	Value
Resistance	15 kOhms
Tolerance	±1%
Power Rating	0.063W (1/16W)
Package / Case	0402 (1005 Metric)
Composition	Thin Film
Temperature Coefficient	±50ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Moisture Sensitivity Level (MSL)	1 (Unlimited)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

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

Resistance Value: Must be 15 kOhms
Tolerance: ±1% or tighter (±0.5%, ±0.25%, ±0.1% are acceptable upgrades)
Power Rating: Minimum 0.063W (1/16W); higher ratings (0.1W/1/10W) are acceptable upgrades
Package: 0402 (1005 Metric) only
Composition: Thin Film
Temperature Coefficient: ±50ppm/°C or better
Operating Temperature: -55°C ~ 155°C minimum
Moisture Sensitivity: MSL 1 (Unlimited)
RoHS Compliance: ROHS3 Compliant

Substitute parts are categorized as direct equivalents (matching all parameters) or upgrades (improved tolerance, power rating, or additional certifications while maintaining core electrical specifications).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Operating Temp (°C)	Product Status	Features
RN731ETTP1502F50	KOA Speer Electronics, Inc.	15 kOhms	±1%	0.063	±50	-55 ~ 155	Obsolete	Moisture Resistant
RN73R1ETTP1502F50	KOA Speer Electronics, Inc.	15 kOhms	±1%	0.063	±50	-55 ~ 155	Active	Automotive AEC-Q200, Moisture Resistant
RT0402FRE0715KL	YAGEO	15 kOhms	±1%	0.063	±50	-55 ~ 155	Active	—
AT0402DRE0715KL	YAGEO	15 kOhms	±0.5%	0.063	±50	-55 ~ 155	Active	Anti-Sulfur, Automotive AEC-Q200, Moisture Resistant
MCS04020C1502FE000	Vishay Beyschlag/Draloric/BC Components	15 kOhms	±1%	0.063	±50	-55 ~ 155	Active	Anti-Sulfur
RNCF0402BTC15K0	Stackpole Electronics Inc	15 kOhms	±0.1%	0.1	±50	-55 ~ 155	Active	Automotive AEC-Q200
RNCF0402DTC15K0	Stackpole Electronics Inc	15 kOhms	±0.5%	0.1	±50	-55 ~ 155	Active	Automotive AEC-Q200
RNCF0402FTE15K0	Stackpole Electronics Inc	15 kOhms	±1%	0.1	±25	-55 ~ 155	Active	Automotive AEC-Q200
RT0402BRE0715KL	YAGEO	15 kOhms	±0.1%	0.063	±50	-55 ~ 155	Active	—
RT0402CRE0715KL	YAGEO	15 kOhms	±0.25%	0.063	±50	-55 ~ 155	Active	—
RT0402DRE0715KL	YAGEO	15 kOhms	±0.5%	0.063	±50	-55 ~ 155	Active	—

Engineering Selection Recommendations

Direct Equivalent (Active Status): RN73R1ETTP1502F50 from KOA Speer Electronics, Inc. is the direct successor to the obsolete RN731ETTP1502F50. It maintains identical electrical specifications (15 kOhms ±1%, 0.063W) and package format while adding Automotive AEC-Q200 certification. This part is recommended as the primary replacement for direct substitution.

Standard Equivalents (Active Status, No Certification Upgrades): RT0402FRE0715KL from YAGEO provides an electrically equivalent alternative with identical resistance, tolerance, power rating, and temperature characteristics. MCS04020C1502FE000 from Vishay Beyschlag/Draloric/BC Components offers equivalent specifications with anti-sulfur protection.

Upgraded Alternatives (Tighter Tolerance): RT0402BRE0715KL, RT0402CRE0715KL, and RT0402DRE0715KL from YAGEO provide tolerance improvements (±0.1%, ±0.25%, ±0.5% respectively) while maintaining the original 0.063W power rating and all other core parameters.

Upgraded Alternatives (Higher Power Rating): RNCF0402BTC15K0, RNCF0402DTC15K0, and RNCF0402FTE15K0 from Stackpole Electronics Inc. offer increased power dissipation (0.1W vs. 0.063W) with varying tolerance levels and Automotive AEC-Q200 certification. RNCF0402FTE15K0 additionally features an improved temperature coefficient of ±25ppm/°C.

Upgraded Alternative (Tighter Tolerance + Automotive Certification): AT0402DRE0715KL from YAGEO combines ±0.5% tolerance with Automotive AEC-Q200 and anti-sulfur protection while maintaining the original power rating.

All recommended substitutes are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating and operate across the -55°C ~ 155°C temperature range.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with tighter tolerance than the original RN731ETTP1502F50? A: Yes. Tighter tolerance specifications (±0.5%, ±0.25%, ±0.1%) are acceptable upgrades and will not compromise circuit performance. The original ±1% tolerance requirement is met or exceeded by these alternatives.

Q: Are substitute parts with higher power ratings (0.1W instead of 0.063W) compatible? A: Yes. Higher power ratings provide additional thermal margin and are fully compatible. The 0.1W (1/10W) rated parts will function identically in circuits designed for 0.063W (1/16W) components.

Q: What is the significance of Automotive AEC-Q200 certification on substitute parts? A: AEC-Q200 certification indicates the part meets automotive industry reliability and quality standards. This certification is an enhancement and does not affect compatibility with non-automotive applications. Parts with this certification are suitable for both automotive and general industrial use.

Q: Does the 0402 (1005 Metric) package dimension remain consistent across all substitutes? A: Yes. All substitute parts use the identical 0402 (1005 Metric) package format (0.039" L x 0.020" W / 1.00mm x 0.50mm). Height variations are minimal (0.014" to 0.016" seated height) and do not affect PCB assembly compatibility.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the environmental compliance profile of the original component.

Q: Which substitute should I select for new production designs? A: For direct replacement without design changes, select RN73R1ETTP1502F50 (KOA Speer). For designs requiring automotive qualification, select AT0402DRE0715KL (YAGEO) or any RNCF series part from Stackpole. For general industrial applications with standard availability, RT0402FRE0715KL (YAGEO) or MCS04020C1502FE000 (Vishay) are suitable alternatives.

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