AC0201FR-0791RL Equivalent & Substitute Parts

Part Overview

The AC0201FR-0791RL is a 91 Ohms ±1% 0.05W thick film chip resistor in 0201 (0603 Metric) package manufactured by YAGEO. This automotive-grade component features AEC-Q200 qualification and moisture resistance, designed for high-reliability applications operating across -55°C to 155°C. Finding equivalent parts becomes necessary when managing supply chain continuity, addressing component obsolescence, or optimizing inventory across multiple manufacturers while maintaining identical electrical and mechanical performance.

Key Parameters

Parameter	Specification
Resistance Value	91 Ohms
Tolerance	±1%
Power Rating	0.05W (1/20W)
Package / Case	0201 (0603 Metric)
Composition	Thick Film
Temperature Coefficient	±200ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Moisture Sensitivity Level	MSL 1 (Unlimited)
RoHS Status	ROHS3 Compliant
Automotive Rating	AEC-Q200

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters: resistance value (91 Ohms), tolerance (±1%), power rating (0.05W), package type (0201), composition (thick film), temperature coefficient (±200ppm/°C), and compliance certifications (ROHS3, MSL 1). All substitute parts listed maintain identical electrical characteristics and physical dimensions. Substitutes are grouped by product status and manufacturer to facilitate selection based on availability and supply chain requirements.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power	Temp Coeff	Op. Temp Range	Package	Product Status	AEC-Q200
AC0201FR-0791RL	YAGEO	91Ω	±1%	0.05W	±200ppm/°C	-55°C ~ 155°C	0201	Active	Yes
RC0201FR-0791RL	YAGEO	91Ω	±1%	0.05W	±200ppm/°C	-55°C ~ 125°C	0201	Active	No
CRCW020191R0FNED	Vishay Dale	91Ω	±1%	0.05W	±200ppm/°C	-55°C ~ 155°C	0201	Active	No
ERJ-1GEF91R0C	Panasonic Electronic Components	91Ω	±1%	0.05W	±200ppm/°C	-55°C ~ 125°C	0201	Obsolete	No
RK73H1HTTC91R0F	KOA Speer Electronics, Inc.	91Ω	±1%	0.05W	±200ppm/°C	-55°C ~ 155°C	0201	Not For New Designs	Yes
ERJ-1GNF91R0C	Panasonic Electronic Components	91Ω	±1%	0.05W	±200ppm/°C	-55°C ~ 125°C	0201	Active	No

Engineering Selection Recommendations

For applications requiring the full -55°C to 155°C operating temperature range with AEC-Q200 automotive qualification, the AC0201FR-0791RL and CRCW020191R0FNED are primary selections. The CRCW020191R0FNED from Vishay Dale provides equivalent performance with extended temperature capability matching the original specification.

For applications operating within -55°C to 125°C, RC0201FR-0791RL (YAGEO) and ERJ-1GNF91R0C (Panasonic) are suitable alternatives with active product status. The RC0201FR-0791RL maintains YAGEO series continuity, while ERJ-1GNF91R0C represents an upgrade from the obsolete ERJ-1GEF91R0C variant.

The RK73H1HTTC91R0F (KOA Speer) maintains AEC-Q200 qualification and full temperature range but carries "Not For New Designs" status, limiting its use to legacy system support or existing inventory management.

The ERJ-1GEF91R0C (Panasonic) is marked obsolete and should not be selected for new designs despite available inventory.

Frequently Asked Questions (FAQ)

Q: Can RC0201FR-0791RL replace AC0201FR-0791RL in all applications?

A: RC0201FR-0791RL is electrically equivalent but operates only to 125°C versus the original 155°C maximum. It is suitable for applications with maximum operating temperatures at or below 125°C. For designs requiring the full 155°C capability, use CRCW020191R0FNED or maintain AC0201FR-0791RL.

Q: What is the difference between AC0201FR-0791RL and RK73H1HTTC91R0F?

A: Both parts are AEC-Q200 qualified with identical electrical specifications and -55°C to 155°C operating range. The primary difference is manufacturer (YAGEO versus KOA Speer) and product lifecycle status. RK73H1HTTC91R0F is marked "Not For New Designs," making it unsuitable for new development.

Q: Is ERJ-1GNF91R0C a direct replacement for AC0201FR-0791RL?

A: ERJ-1GNF91R0C matches all electrical parameters but operates only to 125°C and lacks AEC-Q200 qualification. It is suitable for non-automotive applications or designs with lower temperature requirements. For automotive or full-temperature-range applications, use AC0201FR-0791RL, CRCW020191R0FNED, or RK73H1HTTC91R0F.

Q: Why is ERJ-1GEF91R0C listed if it is obsolete?

A: ERJ-1GEF91R0C is documented as an obsolete variant for reference purposes only. It should not be selected for new designs. ERJ-1GNF91R0C is the active Panasonic equivalent.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all listed parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with modern manufacturing and environmental standards.

Q: Can these parts be used interchangeably in PCB assembly?

A: Yes, all parts share identical 0201 (0603 Metric) package dimensions (0.024" L x 0.012" W, 0.010" max height) and two terminations, enabling direct PCB footprint compatibility without layout modifications.

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