RC5025F1543CS Equivalent & Substitute Parts

Part Overview

The RC5025F1543CS is a 154 kOhms ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics, rated for 0.667W (2/3W) power dissipation in a 2010 (5025 Metric) surface mount package. This component is classified as Active product status and is ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across the same resistance value, tolerance, package footprint, and operating temperature range. The primary substitute identified is the ERJ-12SF1543U from Panasonic Electronic Components, which shares the same resistance specification and package dimensions while offering higher power rating and automotive qualification.

Substiute Parts

RC5025F1543CS

Samsung Electro-MechanicsIn Stock: 1150RC5025F1543CS Datasheet

Current PartRFQ

ERJ-12SF1543U

Panasonic Electronic ComponentsIn Stock: 5840ERJ-12SF1543U Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RC5025F1543CS is determined by strict alignment of the following critical parameters:

Electrical Parameters (Must Match):

• Resistance value: 154 kOhms
• Tolerance: ±1%
• Temperature coefficient: ±100ppm/°C
• Operating temperature range: -55°C to 155°C

Mechanical Parameters (Must Match):

• Package type: 2010 (5025 Metric)
• Physical dimensions: 0.197" L x 0.098" W (5.00mm x 2.50mm)
• Number of terminations: 2

Allowable Variation:

• Power rating may exceed the original specification (0.667W minimum required)
• Composition must remain thick film
• Moisture sensitivity level must be MSL 1 or equivalent

The ERJ-12SF1543U meets all mandatory electrical and mechanical criteria. It provides identical resistance, tolerance, temperature coefficient, and operating range within the same 2010 package footprint. The higher power rating (0.75W versus 0.667W) represents an acceptable upgrade that maintains backward compatibility in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: ERJ-12SF1543U

The ERJ-12SF1543U is electrically and mechanically compatible with the RC5025F1543CS for direct substitution in circuit applications. Both components share identical resistance (154 kOhms), tolerance (±1%), temperature coefficient (±100ppm/°C), and operating temperature range (-55°C to 155°C). The 2010 package footprint and physical dimensions are identical, ensuring PCB layout compatibility without modification.

The ERJ-12SF1543U provides a higher power rating (0.75W versus 0.667W), which represents a performance upgrade suitable for applications where the original part may operate near its thermal limits. The 0.002" (0.04mm) increase in seated height is negligible for standard PCB assembly processes.

Compliance Considerations:

Both parts maintain ROHS3 compliance and MSL 1 rating. The ERJ-12SF1543U carries AEC-Q200 automotive qualification, which is not present in the RC5025F1543CS specification. This additional qualification does not restrict use in non-automotive applications.

Product Status Note:

The RC5025F1543CS maintains Active product status, indicating continued availability and manufacturer support. The ERJ-12SF1543U is marked "Not For New Designs," indicating Panasonic has transitioned this part to mature status. For new design projects, the RC5025F1543CS is the preferred selection. For existing designs or replacement scenarios, the ERJ-12SF1543U remains functionally equivalent.

Frequently Asked Questions (FAQ)

Q: Can the ERJ-12SF1543U be used as a direct replacement for the RC5025F1543CS on existing PCBs?

A: Yes. Both components use the 2010 (5025 Metric) package with identical footprint dimensions (0.197" L x 0.098" W). The 0.002" difference in seated height is within standard PCB assembly tolerances and does not require design modification.

Q: What is the significance of the higher power rating on the ERJ-12SF1543U?

A: The ERJ-12SF1543U is rated for 0.75W compared to the RC5025F1543CS at 0.667W. This higher rating provides additional thermal margin in applications where power dissipation approaches the component limit. The substitute can handle greater power without exceeding temperature specifications.

Q: Are there any electrical performance differences between these parts?

A: No. Both components have identical resistance (154 kOhms), tolerance (±1%), temperature coefficient (±100ppm/°C), and operating temperature range (-55°C to 155°C). Electrical performance is equivalent.

Q: Why is the ERJ-12SF1543U marked "Not For New Designs"?

A: This designation indicates Panasonic has transitioned the part to mature lifecycle status. The component remains available and functional but is not recommended for new product development. The RC5025F1543CS (Active status) is preferred for new designs.

Q: Does the AEC-Q200 rating on the ERJ-12SF1543U affect its use in non-automotive applications?

A: No. AEC-Q200 is an automotive qualification standard. Components meeting this standard exceed general industrial requirements and are suitable for any application. The presence of this certification does not restrict use outside automotive environments.

Q: Are the packaging formats compatible?

A: The RC5025F1543CS is specified with "-" packaging notation. The ERJ-12SF1543U is supplied in Tape & Reel (TR) format. Both formats contain identical components; the difference is in the delivery method. Tape & Reel format is standard for automated assembly processes.

Q: What compliance certifications apply to both parts?

A: Both the RC5025F1543CS and ERJ-12SF1543U are ROHS3 compliant, REACH unaffected, and classified as MSL 1 (unlimited moisture sensitivity). Both carry EAR99 ECCN classification and HTSUS code 8533.21.0030.