RC1005F510CS Equivalent & Substitute Parts Reference

Part Overview

The RC1005F510CS is a 51 Ohm ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics in 0402 (1005 Metric) package format. This surface mount device is rated at 0.063W (1/16W) power dissipation with moisture resistant characteristics and operates across the temperature range of -55°C to 155°C. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). Equivalent and substitute parts are identified to support component sourcing flexibility, design continuity, and supply chain alternatives.

Key Parameters

Parameter	Value
Resistance	51 Ohms
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 to 155°C
Moisture Sensitivity Level	1 (Unlimited)
RoHS Status	ROHS3 Compliant
Number of Terminations	2

Substitute Part Grouping Explanation

Substitution eligibility for the RC1005F510CS is determined by strict equivalence across the following critical parameters: resistance value (51 Ohms), tolerance (±1%), package format (0402 / 1005 Metric), composition (thick film), temperature coefficient (±100ppm/°C), and operating temperature range (-55°C to 155°C). Parts are grouped into three categories based on substitution relationship:

Direct Equivalents maintain identical electrical specifications, power rating (0.063W / 1/16W), and packaging format. These parts are pin-for-pin compatible with no design modifications required.

Upgrade Substitutes provide enhanced power rating (0.1W / 1/10W) or additional certifications (AEC-Q200 automotive qualification) while maintaining all other core parameters. These parts are backward compatible and suitable for designs requiring higher reliability margins.

Similar Substitutes match all electrical and mechanical parameters but may differ in packaging type (Cut Tape vs. Tape & Reel), height specifications, or compliance certifications. These parts require verification of packaging compatibility with assembly equipment.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op. Temp (°C)	Features	RoHS Status	Substitution Type
RC1005F510CS	Samsung Electro-Mechanics	51 Ω	±1%	0.063	0402	±100ppm/°C	-55 to 155	Moisture Resistant	ROHS3	Main Part
CR0402-FX-51R0GLF	Bourns Inc.	51 Ω	±1%	0.063	0402	±100ppm/°C	-55 to 155	—	ROHS3	Direct Equivalent
CRG0402F51R	TE Connectivity Passive Product	51 Ω	±1%	0.063	0402	±100ppm/°C	-55 to 155	—	ROHS3	Direct Equivalent
RC0402FR-0751RL	YAGEO	51 Ω	±1%	0.063	0402	±100ppm/°C	-55 to 155	Moisture Resistant	ROHS3	Direct Equivalent
ERJ-2RKF51R0X	Panasonic Electronic Components	51 Ω	±1%	0.1	0402	±100ppm/°C	-55 to 155	Automotive AEC-Q200	ROHS3	Upgrade Substitute
AC0402FR-0751RL	YAGEO	51 Ω	±1%	0.063	0402	±100ppm/°C	-55 to 155	Automotive AEC-Q200, Moisture Resistant	ROHS3	Similar Substitute
CRCW040251R0FKED	Vishay Dale	51 Ω	±1%	0.063	0402	±100ppm/°C	-55 to 155	Automotive AEC-Q200	ROHS3	Similar Substitute
CRCW040251R0FKTD	Vishay Dale	51 Ω	±1%	0.063	0402	±100ppm/°C	-55 to 155	Automotive AEC-Q200	RoHS Non-compliant	Similar Substitute
RMCF0402FT51R0	Stackpole Electronics Inc	51 Ω	±1%	0.063	0402	±100ppm/°C	-55 to 155	Automotive AEC-Q200	ROHS3	Similar Substitute

Engineering Selection Recommendations

For Direct Replacement without Design Changes: CR0402-FX-51R0GLF (Bourns Inc.), CRG0402F51R (TE Connectivity Passive Product), and RC0402FR-0751RL (YAGEO) are direct electrical and mechanical equivalents. All three maintain identical resistance, tolerance, power rating, package format, and temperature specifications. Selection among these three is based on inventory availability and supply chain preference. All are ROHS3 compliant with MSL 1 rating.

For Enhanced Reliability Applications: ERJ-2RKF51R0X (Panasonic Electronic Components) provides an upgrade path with increased power rating (0.1W vs. 0.063W) and AEC-Q200 automotive qualification. This part is suitable for designs requiring automotive-grade components or applications with higher thermal stress margins while maintaining all other electrical parameters.

For Automotive and Moisture-Critical Applications: AC0402FR-0751RL (YAGEO), CRCW040251R0FKED (Vishay Dale), and RMCF0402FT51R0 (Stackpole Electronics Inc) incorporate AEC-Q200 automotive certification. AC0402FR-0751RL additionally includes moisture resistant features matching the original part. CRCW040251R0FKED and RMCF0402FT51R0 are suitable for automotive designs where AEC-Q200 qualification is required.

Compliance Consideration: CRCW040251R0FKTD (Vishay Dale) is RoHS non-compliant and REACH affected. This part should be selected only when legacy design requirements or specific supply chain constraints mandate its use. ROHS3 compliant alternatives are preferred for new designs.

Frequently Asked Questions (FAQ)

Q: Can CR0402-FX-51R0GLF directly replace RC1005F510CS without any circuit modifications?

A: Yes. CR0402-FX-51R0GLF is a direct equivalent with identical resistance (51 Ohms), tolerance (±1%), power rating (0.063W), package format (0402), temperature coefficient (±100ppm/°C), and operating temperature range (-55°C to 155°C). No circuit modifications are required.

Q: What is the difference between the main part and ERJ-2RKF51R0X?

A: ERJ-2RKF51R0X provides a higher power rating of 0.1W (1/10W) compared to the 0.063W (1/16W) of RC1005F510CS. All other electrical parameters remain identical. This upgrade is backward compatible and suitable for applications requiring additional thermal headroom. ERJ-2RKF51R0X also includes AEC-Q200 automotive qualification.

Q: Are all substitute parts available in Tape & Reel packaging?

A: Most substitute parts are available in Tape & Reel (TR) packaging. AC0402FR-0751RL is supplied in Cut Tape (CT) & Digi-Reel® format. Verify packaging compatibility with your assembly equipment before selection.

Q: Which substitute parts include moisture resistant features like the original RC1005F510CS?

A: RC0402FR-0751RL (YAGEO) and AC0402FR-0751RL (YAGEO) both include moisture resistant characteristics. If moisture resistance is a design requirement, these two parts are preferred alternatives.

Q: Can I use CRCW040251R0FKTD in a new design?

A: CRCW040251R0FKTD is RoHS non-compliant and REACH affected. For new designs, ROHS3 compliant alternatives such as CRCW040251R0FKED, RMCF0402FT51R0, or other listed substitutes are recommended. CRCW040251R0FKTD should be reserved for legacy design support only.

Q: What is the height difference between substitute parts?

A: Most parts have a maximum seated height of 0.016" (0.40mm). AC0402FR-0751RL has a slightly lower maximum seated height of 0.015" (0.37mm). This minor difference is typically not significant for standard PCB assembly but should be verified if height-constrained applications are involved.

Q: Are all substitute parts rated for the same temperature range?

A: Yes. All listed substitute parts operate across the identical temperature range of -55°C to 155°C with the same temperature coefficient of ±100ppm/°C.

Q: Which substitute offers the best inventory availability?

A: RC0402FR-0751RL (YAGEO) has the highest inventory level at 350,524 pieces. ERJ-2RKF51R0X (Panasonic) has 326,196 pieces available. CR0402-FX-51R0GLF (Bourns) has 54,161 pieces. Inventory levels should be verified with your supplier for current availability.

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