RC1005F2551CS Equivalent & Substitute Parts

Part Overview

The RC1005F2551CS is a 2.55 kOhms ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics in the 0402 (1005 Metric) package format. This surface mount device is rated for 0.063W (1/16W) power dissipation and operates across the temperature range of -55°C to 155°C. The component features moisture resistance and is RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. The part is currently in active production status with 702 units in stock.

Equivalent and substitute parts are necessary when the primary manufacturer part becomes unavailable, when supply chain optimization is required, or when design specifications allow for alternative qualified sources that meet identical electrical and mechanical parameters.

Key Parameters

Parameter	Value
Resistance	2.55 kOhms
Tolerance	±1%
Power Rating	0.063W (1/16W)
Package / Case	0402 (1005 Metric)
Composition	Thick Film
Temperature Coefficient	±100ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Terminations	2
RoHS Status	RoHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the RC1005F2551CS is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Resistance value: 2.55 kOhms
Tolerance: ±1%
Package format: 0402 (1005 Metric)
Composition: Thick Film
Temperature coefficient: ±100ppm/°C
Operating temperature range: -55°C ~ 155°C
Number of terminations: 2
RoHS3 compliance
MSL rating: 1 (Unlimited)

Allowable Variation:

Power rating: Substitute parts rated at 0.1W (1/10W) or higher are acceptable as they exceed the 0.063W (1/16W) requirement
Packaging format: Tape & Reel (TR) or Cut Tape (CT) variants are interchangeable in manufacturing processes
Additional certifications: Automotive AEC-Q200 qualification is an enhancement and does not disqualify substitution
Moisture resistance feature: Present in main part and most substitutes; absence does not prevent substitution if all other parameters match

Identified substitute parts are grouped into two categories: Direct Equivalents (identical specifications including power rating) and Rated Equivalents (higher power rating with all other parameters matching).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (Watts)	Package	Temp Coeff	Operating Temp	RoHS3	MSL	AEC-Q200
RC1005F2551CS	Samsung Electro-Mechanics	2.55 kOhms	±1%	0.063W	0402	±100ppm/°C	-55°C ~ 155°C	Yes	1	No
CR0402-FX-2551GLF	Bourns Inc.	2.55 kOhms	±1%	0.063W	0402	±100ppm/°C	-55°C ~ 155°C	Yes	1	No
ERJ-2RKF2551X	Panasonic Electronic Components	2.55 kOhms	±1%	0.1W	0402	±100ppm/°C	-55°C ~ 155°C	Yes	1	Yes
RC0402FR-072K55L	YAGEO	2.55 kOhms	±1%	0.063W	0402	±100ppm/°C	-55°C ~ 155°C	Yes	1	No
AC0402FR-072K55L	YAGEO	2.55 kOhms	±1%	0.063W	0402	±100ppm/°C	-55°C ~ 155°C	Yes	1	Yes
CRCW04022K55FKED	Vishay Dale	2.55 kOhms	±1%	0.063W	0402	±100ppm/°C	-55°C ~ 155°C	Yes	1	Yes
RMCF0402FT2K55	Stackpole Electronics Inc	2.55 kOhms	±1%	0.063W	0402	±100ppm/°C	-55°C ~ 155°C	Yes	1	Yes

Engineering Selection Recommendations

All identified substitute parts meet the mandatory electrical and mechanical specifications for direct substitution with the RC1005F2551CS. Selection among available alternatives should be based on the following criteria:

For Standard Industrial Applications: CR0402-FX-2551GLF (Bourns Inc.) and RC0402FR-072K55L (YAGEO) are direct equivalents with identical power ratings and specifications. Both are in active production with substantial inventory availability.

For Automotive Applications: AC0402FR-072K55L (YAGEO), CRCW04022K55FKED (Vishay Dale), and RMCF0402FT2K55 (Stackpole Electronics Inc) include AEC-Q200 automotive qualification. These parts are suitable for designs requiring automotive-grade component certification while maintaining all electrical and mechanical compatibility.

For Enhanced Power Margin Applications: ERJ-2RKF2551X (Panasonic Electronic Components) provides a higher power rating of 0.1W (1/10W) compared to the 0.063W (1/16W) specification of the main part. This part also carries AEC-Q200 qualification and is suitable for applications where additional thermal headroom is beneficial.

All substitute parts maintain RoHS3 compliance, MSL 1 rating, and identical operating temperature ranges. Packaging format differences (Tape & Reel versus Cut Tape) do not affect electrical or mechanical compatibility and are determined by manufacturing and assembly process requirements.

Frequently Asked Questions (FAQ)

Q: Can ERJ-2RKF2551X be used as a direct replacement for RC1005F2551CS despite the higher power rating?

A: Yes. The ERJ-2RKF2551X is rated for 0.1W (1/10W) power dissipation, which exceeds the 0.063W (1/16W) requirement of the RC1005F2551CS. Higher power ratings provide additional thermal capacity and do not create compatibility issues. All other electrical parameters, including resistance, tolerance, temperature coefficient, and operating temperature range, are identical.

Q: What is the difference between Direct Equivalents and Rated Equivalents?

A: Direct Equivalents match all specifications including power rating (0.063W). Rated Equivalents have identical electrical and mechanical specifications but with higher power ratings (0.1W or greater). Both categories are fully substitutable; the distinction reflects available options within the qualified substitute pool.

Q: Are AEC-Q200 qualified parts suitable for non-automotive applications?

A: Yes. AEC-Q200 qualification represents an additional quality and reliability standard. Parts meeting automotive specifications are fully compatible with standard industrial applications and do not require special handling or installation procedures.

Q: Does the difference between Tape & Reel and Cut Tape packaging affect component performance?

A: No. Packaging format differences relate to manufacturing and assembly logistics only. Electrical and mechanical performance of the component itself is identical regardless of packaging format. Selection between Tape & Reel and Cut Tape should be based on assembly equipment compatibility and procurement requirements.

Q: Can substitute parts with moisture resistance features be replaced with parts without this feature?

A: The RC1005F2551CS includes moisture resistance as a specified feature. While substitute parts without explicit moisture resistance designation (such as CR0402-FX-2551GLF from Bourns) meet all mandatory electrical and mechanical parameters, designs requiring moisture resistance should prioritize substitutes that explicitly specify this feature, such as RC0402FR-072K55L or AC0402FR-072K55L from YAGEO.

Q: What inventory considerations should guide substitute part selection?

A: All identified substitute parts are in active production with substantial inventory levels. CR0402-FX-2551GLF (133,522 units), ERJ-2RKF2551X (234,788 units), and RC0402FR-072K55L (552,351 units) offer the highest inventory availability. Selection should balance immediate availability requirements with long-term supply chain strategy and design qualification timelines.

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