RN731ETTP2002F50 Equivalent & Substitute Parts

Part Overview

The RN731ETTP2002F50 is a 20 kOhms ±1% thin film chip resistor in 0402 (1005 Metric) package rated at 0.063W (1/16W) from KOA Speer Electronics. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The RN731ETTP2002F50 features moisture-resistant construction with ±50ppm/°C temperature coefficient and operates across -55°C to 155°C. Substitute parts must maintain electrical equivalence while meeting the same mechanical and environmental specifications.

Key Parameters

Parameter	Value
Resistance	20 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

Substitute parts for the RN731ETTP2002F50 are grouped based on strict electrical and mechanical compatibility. All substitute parts must meet the following core criteria:

Resistance value: 20 kOhms
Package: 0402 (1005 Metric)
Composition: Thin Film
Temperature Coefficient: ±50ppm/°C
Operating Temperature Range: -55°C to 155°C minimum
RoHS3 Compliance
MSL Rating: 1 (Unlimited)

Direct substitutes maintain the ±1% tolerance and 0.063W power rating. Upgrade substitutes offer enhanced specifications such as tighter tolerance (±0.5% or ±0.1%), higher power rating (0.1W), automotive qualification (AEC-Q200), or additional features (anti-sulfur, current sense, moisture resistant).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Operating Temp (°C)	Product Status	Features
RN731ETTP2002F50	KOA Speer Electronics	20 kΩ	±1%	0.063	±50	-55 to 155	Obsolete	Moisture Resistant
RN73R1ETTP2002F50	KOA Speer Electronics	20 kΩ	±1%	0.063	±50	-55 to 155	Active	Automotive AEC-Q200, Moisture Resistant
CRT0402-FZ-2002GLF	Bourns Inc.	20 kΩ	±1%	0.063	±50	-55 to 155	Active	Current Sense
MCS0402HC2002FE000	Vishay Beyschlag/Draloric/BC Components	20 kΩ	±1%	0.063	±50	-55 to 125	Active	None
RT0402FRE0720KL	YAGEO	20 kΩ	±1%	0.063	±50	-55 to 155	Active	None
AT0402DRE0720KL	YAGEO	20 kΩ	±0.5%	0.063	±50	-55 to 155	Active	Anti-Sulfur, Automotive AEC-Q200, Moisture Resistant
CPF0402F20KE1	TE Connectivity Passive Product	20 kΩ	±1%	0.063	±25	-55 to 155	Active	None
CRT0402-DZ-2002GAS	Bourns Inc.	20 kΩ	±0.5%	0.063	±50	-55 to 155	Active	Anti-Sulfur, Current Sense
MCS04020C2002FE000	Vishay Beyschlag/Draloric/BC Components	20 kΩ	±1%	0.063	±50	-55 to 155	Active	Anti-Sulfur
RNCF0402BTC20K0	Stackpole Electronics Inc	20 kΩ	±0.1%	0.1	±50	-55 to 155	Active	Automotive AEC-Q200
RNCF0402DTC20K0	Stackpole Electronics Inc	20 kΩ	±0.5%	0.1	±50	-55 to 155	Active	Automotive AEC-Q200

Engineering Selection Recommendations

For direct replacement of the obsolete RN731ETTP2002F50, select from active parts maintaining ±1% tolerance and 0.063W power rating with -55°C to 155°C operating range:

RN73R1ETTP2002F50 (KOA Speer Electronics) provides the closest functional equivalent with automotive AEC-Q200 qualification and active product status. This part is the recommended primary substitute.

RT0402FRE0720KL (YAGEO) offers equivalent electrical specifications with active status and high inventory availability (24,543 pcs).

MCS04020C2002FE000 (Vishay) provides anti-sulfur construction with active status and extended operating temperature to 155°C.

For applications requiring enhanced tolerance or power rating, upgrade options include:

AT0402DRE0720KL (YAGEO) with ±0.5% tolerance and automotive AEC-Q200 qualification.

CRT0402-DZ-2002GAS (Bourns) with ±0.5% tolerance and anti-sulfur current sense construction.

RNCF0402BTC20K0 and RNCF0402DTC20K0 (Stackpole) with 0.1W power rating and automotive AEC-Q200 qualification for applications requiring higher power dissipation capability.

All recommended substitutes maintain ROHS3 compliance and MSL 1 rating.

Frequently Asked Questions (FAQ)

Q: Can I use MCS0402HC2002FE000 as a direct substitute?

A: MCS0402HC2002FE000 is electrically compatible but has a reduced operating temperature maximum of 125°C versus the original 155°C. Use only if your application does not require the full -55°C to 155°C range.

Q: What is the difference between direct substitutes and upgrade parts?

A: Direct substitutes maintain identical electrical specifications (±1% tolerance, 0.063W power). Upgrade parts offer enhanced characteristics such as tighter tolerance (±0.5% or ±0.1%), higher power rating (0.1W), automotive qualification, or additional features like anti-sulfur construction.

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 original part's environmental compliance.

Q: Does package compatibility require any PCB layout changes?

A: No. All substitute parts use the 0402 (1005 Metric) package with identical footprint dimensions (0.039" L x 0.020" W / 1.00mm x 0.50mm). No PCB redesign is required.

Q: Which substitute offers the best long-term availability?

A: RT0402FRE0720KL (YAGEO) has the highest current inventory (24,543 pcs) and active product status, providing strong long-term availability assurance.

Q: Can I use RNCF0402BTC20K0 in place of the original part?

A: RNCF0402BTC20K0 is compatible but offers enhanced specifications: ±0.1% tolerance (versus ±1%), 0.1W power rating (versus 0.063W), and automotive AEC-Q200 qualification. It is a suitable upgrade for applications requiring tighter tolerance or higher power dissipation.

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