AC1206JR-0791RL Equivalent & Substitute Parts

Part Overview

The AC1206JR-0791RL is a 91 Ohm ±5% 0.25W thick film chip resistor in 1206 (3216 Metric) package manufactured by YAGEO. This component is rated for automotive applications under AEC-Q200 standard with moisture resistance and operates across -55°C to 155°C. The part is currently active in production with 3806 units in stock.

Substitute parts are necessary when the original part becomes unavailable, when design requirements shift toward higher tolerance specifications, or when alternative manufacturers' components are preferred for supply chain diversification and cost optimization.

Key Parameters

Parameter	Value
Resistance	91 Ohms
Tolerance	±5%
Power Rating	0.25W (1/4W)
Package	1206 (3216 Metric)
Composition	Thick Film
Temperature Coefficient	±100ppm/°C
Operating Temperature Range	-55°C to 155°C
Automotive Rating	AEC-Q200
Moisture Resistance	Yes
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	MSL 1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the AC1206JR-0791RL is determined by the following mandatory parameters:

Resistance value: 91 Ohms (exact match required)
Tolerance: ±5% or tighter (±1% is acceptable as upgrade)
Power rating: 0.25W minimum
Package: 1206 (3216 Metric) form factor
Composition: Thick film construction
Temperature coefficient: ±100ppm/°C or better
Operating temperature range: -55°C to 155°C minimum
RoHS3 compliance
MSL rating: 1 or equivalent

Substitute parts are grouped into two categories: direct equivalents (matching tolerance ±5%) and upgraded alternatives (tighter tolerance ±1%). All listed substitutes maintain identical electrical performance within the specified tolerance bands and are compatible with the same PCB footprint and reflow profiles.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power	Package	Temp Coeff	Temp Range	AEC-Q200	Product Status	Stock (Pcs)
AC1206JR-0791RL	YAGEO	91Ω	±5%	0.25W	1206	±100ppm/°C	-55 to 155°C	Yes	Active	3806
AC1206FR-0791RL	YAGEO	91Ω	±1%	0.25W	1206	±100ppm/°C	-55 to 155°C	Yes	Active	2763
RC1206FR-0791RL	YAGEO	91Ω	±1%	0.25W	1206	±100ppm/°C	-55 to 155°C	No	Active	35103
RC1206JR-0791RL	YAGEO	91Ω	±5%	0.25W	1206	±100ppm/°C	-55 to 155°C	No	Active	70478
CRCW120691R0FKEA	Vishay Dale	91Ω	±1%	0.25W	1206	±100ppm/°C	-55 to 155°C	Yes	Active	28030
ERJ-8ENF91R0V	Panasonic	91Ω	±1%	0.25W	1206	±100ppm/°C	-55 to 155°C	Yes	Not For New Designs	68824
RMCF1206FT91R0	Stackpole Electronics	91Ω	±1%	0.25W	1206	±100ppm/°C	-55 to 155°C	Yes	Active	11620

Engineering Selection Recommendations

For direct replacement maintaining ±5% tolerance specification, RC1206JR-0791RL offers the highest inventory availability (70,478 units) while maintaining identical electrical and thermal characteristics. This part is functionally equivalent to the original AC1206JR-0791RL.

For applications requiring improved tolerance performance, AC1206FR-0791RL, RC1206FR-0791RL, CRCW120691R0FKEA, and RMCF1206FT91R0 provide ±1% tolerance upgrades. Among these, RC1206FR-0791RL provides maximum stock depth (35,103 units) and maintains YAGEO manufacturing consistency.

For automotive AEC-Q200 rated applications, AC1206FR-0791RL, CRCW120691R0FKEA, ERJ-8ENF91R0V, and RMCF1206FT91R0 are certified. The ERJ-8ENF91R0V carries "Not For New Designs" status and should be avoided for new product development despite high inventory levels.

All recommended substitutes are ROHS3 compliant with MSL 1 rating and identical operating temperature ranges.

Frequently Asked Questions (FAQ)

Q: Can RC1206JR-0791RL directly replace AC1206JR-0791RL?

A: Yes. Both parts share identical electrical specifications (91Ω ±5%), power rating (0.25W), package (1206), temperature coefficient (±100ppm/°C), and operating range (-55°C to 155°C). The primary difference is the RC series lacks AEC-Q200 automotive certification, which is acceptable for non-automotive applications.

Q: What is the difference between ±5% and ±1% tolerance parts?

A: Tolerance defines the acceptable resistance variation from the nominal 91 Ohm value. ±5% allows 86.45Ω to 95.55Ω, while ±1% restricts the range to 90.09Ω to 91.91Ω. Applications requiring tighter resistance control should specify ±1% parts.

Q: Are all substitute parts compatible with the same PCB footprint?

A: Yes. All listed substitutes use the 1206 (3216 Metric) package with identical land pattern dimensions (0.122" L x 0.063" W / 3.10mm x 1.60mm). Physical interchangeability is confirmed across all parts.

Q: Why is ERJ-8ENF91R0V marked "Not For New Designs"?

A: This designation indicates the manufacturer (Panasonic) has discontinued active development for this product line. While functionally equivalent and currently in stock, new designs should select from active product lines such as RMCF1206FT91R0, CRCW120691R0FKEA, or YAGEO AC/RC series.

Q: Which substitute offers the best supply chain stability?

A: RC1206JR-0791RL provides the highest inventory (70,478 units) and is manufactured by YAGEO, the original part manufacturer. For automotive applications requiring AEC-Q200 certification, CRCW120691R0FKEA (Vishay Dale, 28,030 units) or RMCF1206FT91R0 (Stackpole, 11,620 units) are preferred alternatives.

Q: Are moisture sensitivity levels identical across all substitutes?

A: Yes. All listed parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions during storage or handling.

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