AF0805JR-0751RL Equivalent & Substitute Parts

Part Overview

The AF0805JR-0751RL is a 51 Ohm ±5% thick film chip resistor in 0805 (2012 Metric) package rated for 0.125W (1/8W) power dissipation. Manufactured by YAGEO under the AF series, this component features anti-sulfur coating and automotive AEC-Q200 qualification, making it suitable for automotive and harsh environment applications. The part is currently active in production with 818 units in stock.

Equivalent and substitute parts are identified based on matching electrical specifications (resistance value, tolerance, power rating), mechanical compatibility (package size and form factor), and environmental ratings (AEC-Q200 automotive qualification, RoHS3 compliance, MSL-1 moisture sensitivity).

Key Parameters

Parameter	Value
Resistance	51 Ohms
Tolerance	±5%
Power Rating	0.125W (1/8W)
Package / Case	0805 (2012 Metric)
Composition	Thick Film
Temperature Coefficient	±100ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Automotive Rating	AEC-Q200
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	MSL-1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Primary Matching Parameters:

Resistance value: 51 Ohms (exact match required)
Package: 0805 (2012 Metric) (exact match required)
Power rating: 0.125W minimum (equal or higher acceptable)
Tolerance: ±5% or tighter (±1% acceptable as upgrade)
Composition: Thick Film
Temperature coefficient: ±100ppm/°C
Operating temperature: -55°C ~ 155°C minimum
Moisture sensitivity: MSL-1

Compliance Parameters:

RoHS3 compliance required
AEC-Q200 automotive rating preferred for automotive applications

Substitute parts are grouped into two categories:

Category A - Direct Equivalents (±5% Tolerance, AEC-Q200): AC0805JR-0751RL (YAGEO), RC0805JR-0751RL (YAGEO), RC2012J510CS (Samsung Electro-Mechanics)

Category B - Upgraded Substitutes (±1% Tolerance, AEC-Q200): AC0805FR-0751RL (YAGEO), RC0805FR-0751RL (YAGEO), CRCW080551R0FKEA (Vishay Dale), CRCW080551R0FKTA (Vishay Dale), ERJ-6ENF51R0V (Panasonic), KTR10EZPF51R0 (Rohm Semiconductor)

Category C - Higher Power Rating (0.5W, ±1% Tolerance, AEC-Q200): CRCW080551R0FKEAHP (Vishay Dale) - suitable only when higher power dissipation capability is required

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op Temp (°C)	AEC-Q200	RoHS3	MSL	Packaging
AF0805JR-0751RL	YAGEO	51Ω	±5%	0.125	0805	±100ppm/°C	-55~155	Yes	Yes	1	Tape & Reel
AC0805JR-0751RL	YAGEO	51Ω	±5%	0.125	0805	±100ppm/°C	-55~155	Yes	Yes	1	Tape & Reel
AC0805FR-0751RL	YAGEO	51Ω	±1%	0.125	0805	±100ppm/°C	-55~155	Yes	Yes	1	Tape & Reel
RC0805JR-0751RL	YAGEO	51Ω	±5%	0.125	0805	±100ppm/°C	-55~155	No	Yes	1	Cut Tape & Digi-Reel
RC0805FR-0751RL	YAGEO	51Ω	±1%	0.125	0805	±100ppm/°C	-55~155	No	Yes	1	Tape & Reel
CRCW080551R0FKEA	Vishay Dale	51Ω	±1%	0.125	0805	±100ppm/°C	-55~155	Yes	Yes	1	Cut Tape & Digi-Reel
CRCW080551R0FKTA	Vishay Dale	51Ω	±1%	0.125	0805	±100ppm/°C	-55~155	Yes	No	1	Tape & Reel
CRCW080551R0FKEAHP	Vishay Dale	51Ω	±1%	0.5	0805	±100ppm/°C	-55~155	Yes	Yes	1	Cut Tape & Digi-Reel
ERJ-6ENF51R0V	Panasonic	51Ω	±1%	0.125	0805	±100ppm/°C	-55~155	Yes	Yes	1	Tape & Reel
KTR10EZPF51R0	Rohm Semiconductor	51Ω	±1%	0.125	0805	±100ppm/°C	-55~155	Yes	Yes	1	Tape & Reel
RC2012J510CS	Samsung Electro-Mechanics	51Ω	±5%	0.125	0805	±100ppm/°C	-55~155	No	Yes	1	Cut Tape

Engineering Selection Recommendations

For Direct Replacement (Same Tolerance ±5%): AC0805JR-0751RL and RC0805JR-0751RL are functionally equivalent to AF0805JR-0751RL. Both maintain ±5% tolerance and 0.125W power rating in 0805 package. AC0805JR-0751RL carries AEC-Q200 automotive qualification and moisture-resistant features. RC0805JR-0751RL is available in higher inventory (288,972 units) with moisture-resistant composition but lacks AEC-Q200 rating.

For Tolerance Upgrade (±1%): AC0805FR-0751RL, RC0805FR-0751RL, CRCW080551R0FKEA, ERJ-6ENF51R0V, and KTR10EZPF51R0 provide tighter tolerance specifications while maintaining all other electrical and mechanical parameters. These are suitable when circuit design requires improved accuracy. All carry AEC-Q200 automotive qualification except RC0805FR-0751RL.

For Higher Power Dissipation: CRCW080551R0FKEAHP is rated for 0.5W (1/2W) power dissipation in the same 0805 package with ±1% tolerance and AEC-Q200 qualification. This part is selected only when thermal analysis indicates power dissipation exceeds 0.125W.

Compliance Considerations: All substitute parts maintain RoHS3 compliance and MSL-1 moisture sensitivity rating. CRCW080551R0FKTA is RoHS non-compliant and REACH-affected; use only when legacy compliance requirements apply. For automotive applications requiring AEC-Q200 certification, select from: AC0805JR-0751RL, AC0805FR-0751RL, CRCW080551R0FKEA, CRCW080551R0FKTA, CRCW080551R0FKEAHP, ERJ-6ENF51R0V, or KTR10EZPF51R0.

Frequently Asked Questions (FAQ)

Q: Can RC0805JR-0751RL replace AF0805JR-0751RL in automotive applications? A: RC0805JR-0751RL matches all electrical and mechanical specifications (51Ω, ±5%, 0.125W, 0805 package, -55°C to 155°C). However, it lacks AEC-Q200 automotive qualification. Use only if automotive certification is not required by design specifications.

Q: What is the difference between ±5% and ±1% tolerance substitutes? A: Tolerance defines the maximum deviation from the nominal 51Ω resistance value. ±5% allows 48.45Ω to 53.55Ω; ±1% allows 50.49Ω to 51.51Ω. ±1% parts provide improved circuit accuracy and are suitable for precision applications. Both are electrically and mechanically compatible.

Q: Is CRCW080551R0FKEAHP a direct substitute? A: CRCW080551R0FKEAHP is mechanically and electrically compatible but rated for 0.5W power dissipation versus 0.125W in the original part. Use only when thermal requirements exceed 0.125W. The higher power rating does not affect circuit operation at lower power levels.

Q: Why do some substitutes have different packaging options (Tape & Reel vs. Cut Tape)? A: Packaging format affects handling and assembly processes. Tape & Reel (TR) is standard for automated pick-and-place assembly. Cut Tape (CT) and Digi-Reel are used for manual assembly or lower-volume production. Electrical and mechanical specifications remain identical regardless of packaging format.

Q: Are all substitute parts RoHS3 compliant? A: Most substitutes are RoHS3 compliant. CRCW080551R0FKTA is RoHS non-compliant and REACH-affected. Verify compliance requirements before selection. All other parts listed meet RoHS3 standards.

Q: Can I use ERJ-6ENF51R0V or KTR10EZPF51R0 in place of AF0805JR-0751RL? A: Yes. Both parts match all critical parameters: 51Ω resistance, 0805 package, 0.125W power rating, -55°C to 155°C operating range, ±100ppm/°C temperature coefficient, AEC-Q200 automotive qualification, and RoHS3 compliance. ERJ-6ENF51R0V is manufactured by Panasonic; KTR10EZPF51R0 is manufactured by Rohm Semiconductor. Both are functionally equivalent with ±1% tolerance upgrade.

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