RC6432F28R7CS Equivalent & Substitute Parts

Part Overview

The RC6432F28R7CS is a 28.7 Ohm ±1% 1W chip resistor manufactured by Samsung Electro-Mechanics in the 2512 (6432 Metric) package. This thick film, moisture-resistant component is designed for general-purpose applications requiring precision resistance values with moderate power dissipation. The part maintains Active product status with 1050 units currently in stock. Substitute parts are identified to address inventory availability, supply chain continuity, or specific application requirements such as automotive qualification.

Key Parameters

Parameter	Value	Significance for Substitution
Resistance Value	28.7 Ohms	Must match exactly for circuit function
Tolerance	±1%	Determines precision class; substitutes must meet or exceed
Power Rating	1W	Must match or exceed for thermal performance
Package / Case	2512 (6432 Metric)	Critical for PCB footprint compatibility
Composition	Thick Film	Determines temperature coefficient and reliability characteristics
Temperature Coefficient	±100ppm/°C	Affects resistance stability across operating range
Operating Temperature Range	-55°C ~ 155°C	Must support application environment
RoHS Status	ROHS3 Compliant	Regulatory requirement for many markets
Moisture Sensitivity Level	1 (Unlimited)	Indicates handling and storage requirements

Substitute Part Grouping Explanation

Substitution eligibility for the RC6432F28R7CS is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Resistance value: 28.7 Ohms (exact match required)
Tolerance: ±1% (minimum precision requirement)
Power rating: 1W (minimum thermal capacity)
Package: 2512 (6432 Metric) (PCB footprint compatibility)
Composition: Thick Film (performance characteristics)
Temperature coefficient: ±100ppm/°C (stability requirement)
Operating temperature range: -55°C ~ 155°C (environmental compatibility)

Compliance Parameters:

RoHS3 Compliant status required
REACH Unaffected status required

The identified substitute CRCW251228R7FKEG meets all mandatory matching parameters and compliance requirements. Additional features such as AEC-Q200 automotive qualification represent enhanced capability beyond the base specification and do not preclude substitution.

Parameter Comparison

Parameter	RC6432F28R7CS (Samsung)	CRCW251228R7FKEG (Vishay Dale)	Match Status
Manufacturer Part Number	RC6432F28R7CS	CRCW251228R7FKEG	Different
Resistance Value	28.7 Ohms	28.7 Ohms	Exact Match
Tolerance	±1%	±1%	Exact Match
Power Rating	1W	1W	Exact Match
Composition	Thick Film	Thick Film	Exact Match
Temperature Coefficient	±100ppm/°C	±100ppm/°C	Exact Match
Operating Temperature Range	-55°C ~ 155°C	-55°C ~ 155°C	Exact Match
Package / Case	2512 (6432 Metric)	2512 (6432 Metric)	Exact Match
Size / Dimension	0.248" L x 0.126" W (6.30mm x 3.20mm)	0.248" L x 0.124" W (6.30mm x 3.15mm)	Compatible
Height - Seated (Max)	0.026" (0.66mm)	0.028" (0.70mm)	Compatible
Number of Terminations	2	2	Exact Match
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Exact Match
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Exact Match
REACH Status	REACH Unaffected	REACH Unaffected	Exact Match
Product Status	Active	Active	Exact Match

Engineering Selection Recommendations

Primary Selection: RC6432F28R7CS (Samsung Electro-Mechanics)

Use the original Samsung part when:

Standard industrial applications without automotive requirements
Moisture-resistant performance is the primary design criterion
Current inventory availability supports project timeline

Substitute Selection: CRCW251228R7FKEG (Vishay Dale)

Use the Vishay Dale substitute when:

Automotive applications requiring AEC-Q200 qualification
Supply chain constraints limit Samsung part availability
Design specifications permit enhanced automotive-grade components
Higher inventory availability (2300 units) supports rapid procurement

Both parts maintain identical electrical performance, thermal characteristics, and regulatory compliance. The dimensional variance (width 0.126" vs 0.124", height 0.026" vs 0.028") falls within standard PCB design tolerances for 2512 package footprints and does not affect interchangeability.

Frequently Asked Questions (FAQ)

Q: Can CRCW251228R7FKEG replace RC6432F28R7CS in any application?

A: Yes. Both parts share identical resistance value (28.7 Ohms), tolerance (±1%), power rating (1W), temperature coefficient (±100ppm/°C), operating temperature range (-55°C ~ 155°C), and package specification (2512/6432 Metric). Both are ROHS3 Compliant and REACH Unaffected. The Vishay part includes additional AEC-Q200 automotive qualification, which does not restrict its use in non-automotive applications.

Q: Are there dimensional compatibility concerns?

A: Minor dimensional differences exist within acceptable tolerances. The Vishay part is 0.002" narrower (3.15mm vs 3.20mm) and 0.002" taller (0.70mm vs 0.66mm). These variations are within standard PCB design margins for 2512 package footprints and do not affect placement or soldering.

Q: What is the significance of the AEC-Q200 rating on the Vishay part?

A: AEC-Q200 is an automotive industry qualification standard. This certification indicates the Vishay part meets enhanced reliability and testing requirements for automotive applications. For non-automotive use, this represents additional qualification beyond the base specification and does not limit substitution.

Q: Do both parts have the same moisture sensitivity?

A: Yes. Both parts carry Moisture Sensitivity Level 1 (Unlimited), indicating no special moisture control requirements during storage or handling.

Q: Which part should be selected for new designs?

A: Selection depends on application requirements and supply availability. For automotive designs, specify CRCW251228R7FKEG. For general industrial applications, either part is acceptable based on inventory and lead time considerations.

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