RC5025J121CS Equivalent & Substitute Parts

Part Overview

The RC5025J121CS is a 120 Ohms ±5% thick film chip resistor rated at 0.667W (2/3W) in a 2010 (5025 Metric) package manufactured by Samsung Electro-Mechanics. This component is classified as Active product status and is RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. The part is moisture resistant and suitable for applications requiring standard tolerance resistive elements across the operating temperature range of -55°C to 155°C. Equivalent and substitute parts are identified to address inventory availability, enhanced performance specifications, or specific application requirements while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Resistance	120 Ohms
Tolerance	±5%
Power Rating	0.667W (2/3W)
Package / Case	2010 (5025 Metric)
Composition	Thick Film
Temperature Coefficient	±100ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Moisture Sensitivity Level	1 (Unlimited)
RoHS Status	ROHS3 Compliant
Number of Terminations	2

Substitute Part Grouping Explanation

Substitute parts for the RC5025J121CS are qualified based on the following criteria:

Electrical Compatibility:

Identical resistance value: 120 Ohms
Tolerance specifications: ±5% or tighter (±1%)
Power rating: Equal to or greater than 0.667W
Temperature coefficient: ±100ppm/°C
Operating temperature range: -55°C ~ 155°C or equivalent

Mechanical Compatibility:

Package type: 2010 (5025 Metric)
Number of terminations: 2
Physical dimensions: 0.197" L x 0.098" W (5.00mm x 2.50mm)
Height seated (maximum): 0.026" to 0.028" (0.65mm to 0.70mm)

Compliance & Environmental:

RoHS3 compliance required
MSL 1 (Unlimited) moisture sensitivity
REACH Unaffected status
ECCN EAR99 classification

Substitute parts are categorized as Upgrade or Similar based on enhanced specifications. Upgrade parts provide improved tolerance (±1% versus ±5%) and/or increased power rating (0.75W versus 0.667W). Similar parts maintain equivalent specifications with alternative manufacturer sourcing.

Parameter Comparison

Parameter	RC5025J121CS (Main)	AC2010FK-07120RL	RC2010FK-07120RL	RC2010JK-07120RL	CRCW2010120RFKEF	RPC2010JT120R
Manufacturer	Samsung Electro-Mechanics	YAGEO	YAGEO	YAGEO	Vishay Dale	Stackpole Electronics Inc
Resistance	120 Ohms	120 Ohms	120 Ohms	120 Ohms	120 Ohms	120 Ohms
Tolerance	±5%	±1%	±1%	±5%	±1%	±5%
Power Rating	0.667W	0.75W	0.75W	0.75W	0.75W	0.75W
Package / Case	2010 (5025 Metric)	2010 (5025 Metric)	2010 (5025 Metric)	2010 (5025 Metric)	2010 (5025 Metric)	2010 (5025 Metric)
Composition	Thick Film	Thick Film	Thick Film	Thick Film	Thick Film	Thick Film
Temperature Coefficient	±100ppm/°C	±100ppm/°C	±100ppm/°C	±100ppm/°C	±100ppm/°C	±100ppm/°C
Operating Temperature	-55°C ~ 155°C	-55°C ~ 155°C	-55°C ~ 155°C	-55°C ~ 155°C	-55°C ~ 155°C	-55°C ~ 155°C
Height - Seated (Max)	0.026" (0.66mm)	0.026" (0.65mm)	0.026" (0.65mm)	0.026" (0.65mm)	0.028" (0.70mm)	0.026" (0.65mm)
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All substitute parts listed maintain Active product status and full RoHS3 compliance with REACH Unaffected designation, ensuring regulatory alignment with the original RC5025J121CS component.

Upgrade Parts (Enhanced Specifications):

AC2010FK-07120RL, RC2010FK-07120RL, and CRCW2010120RFKEF provide improved tolerance specification at ±1% compared to the main part's ±5%, with increased power rating of 0.75W. AC2010FK-07120RL and CRCW2010120RFKEF include Automotive AEC-Q200 qualification, suitable for applications requiring automotive-grade reliability. RC2010FK-07120RL offers the same ±1% tolerance upgrade without automotive qualification.

Similar Parts (Equivalent Specifications):

RC2010JK-07120RL and RPC2010JT120R maintain the ±5% tolerance specification matching the main part while providing increased 0.75W power rating. RPC2010JT120R includes Automotive AEC-Q200 qualification and pulse withstanding capability. RC2010JK-07120RL provides standard moisture-resistant thick film construction without automotive qualification.

Physical Compatibility:

All substitute parts conform to 2010 (5025 Metric) package dimensions with seated heights ranging from 0.026" to 0.028", ensuring compatibility with standard PCB assembly processes and design layouts. The CRCW2010120RFKEF exhibits maximum seated height of 0.028" (0.70mm), which remains within acceptable tolerance for typical 2010 package applications.

Frequently Asked Questions (FAQ)

Q: Can RC2010FK-07120RL directly replace RC5025J121CS in all applications?

A: RC2010FK-07120RL is electrically and mechanically compatible with RC5025J121CS. Both components share identical 120 Ohm resistance, ±100ppm/°C temperature coefficient, and -55°C to 155°C operating range. RC2010FK-07120RL provides improved ±1% tolerance and 0.75W power rating compared to the main part's ±5% tolerance and 0.667W rating. Direct substitution is valid where the enhanced specifications do not create design conflicts.

Q: What is the difference between Upgrade and Similar substitute classifications?

A: Upgrade parts (AC2010FK-07120RL, RC2010FK-07120RL, CRCW2010120RFKEF) provide enhanced electrical specifications including tighter tolerance (±1%) and increased power rating (0.75W). Similar parts (RC2010JK-07120RL, RPC2010JT120R) maintain equivalent tolerance and power specifications to the main part while offering alternative manufacturer sourcing. Selection depends on application requirements and design margin considerations.

Q: Are all substitute parts suitable for automotive applications?

A: AC2010FK-07120RL, CRCW2010120RFKEF, and RPC2010JT120R carry Automotive AEC-Q200 qualification. RC2010FK-07120RL and RC2010JK-07120RL do not include automotive qualification. Automotive application requirements determine whether AEC-Q200 certification is mandatory for component selection.

Q: Do substitute parts require different PCB layout or assembly procedures?

A: All substitute parts conform to 2010 (5025 Metric) package specifications with compatible termination counts (2) and physical dimensions (0.197" L x 0.098" W). Seated heights range from 0.026" to 0.028", maintaining compatibility with standard PCB assembly processes. No layout or assembly procedure modifications are required.

Q: What is the moisture sensitivity rating for all listed parts?

A: All parts, including the main component RC5025J121CS and all substitute parts, carry MSL 1 (Unlimited) moisture sensitivity classification. This rating indicates unlimited shelf life without moisture control requirements, suitable for standard storage and handling conditions.

Q: Can parts with ±1% tolerance be used in circuits designed for ±5% tolerance components?

A: Parts with ±1% tolerance (AC2010FK-07120RL, RC2010FK-07120RL, CRCW2010120RFKEF) are directly substitutable in applications designed for ±5% tolerance components. The tighter tolerance provides improved circuit performance and stability without introducing compatibility issues. Circuit design margins accommodate the enhanced specification.

Q: What compliance certifications apply to all substitute parts?

A: All substitute parts maintain RoHS3 compliance and REACH Unaffected status, matching the regulatory requirements of the main part RC5025J121CS. ECCN classification is EAR99 for all components. These certifications ensure compliance with international environmental and export regulations.

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