RT0805FRE07309RL Equivalent & Substitute Parts

Part Overview

The RT0805FRE07309RL is a 309 Ohm ±1% thin film chip resistor in 0805 (2012 Metric) package rated for 0.125W (1/8W) operation. Manufactured by YAGEO, this component is actively produced and ROHS3 compliant. Substitute parts are identified to provide design flexibility when the primary part is unavailable, when tighter tolerance specifications are required, or when enhanced automotive qualification is needed for specific applications.

Key Parameters

Parameter	Value
Resistance	309 Ohms
Tolerance	±1%
Power Rating	0.125W (1/8W)
Package / Case	0805 (2012 Metric)
Composition	Thin Film
Operating Temperature Range	-55°C ~ 155°C
Temperature Coefficient	±50ppm/°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the RT0805FRE07309RL is determined by the following criteria:

Primary Substitution Parameters:

Resistance value: 309 Ohms (exact match required)
Package / Case: 0805 (2012 Metric) (exact match required)
Composition: Thin Film (exact match required)
Operating Temperature Range: -55°C ~ 155°C (minimum requirement)
RoHS Status: ROHS3 Compliant (minimum requirement)

Allowable Variations:

Tolerance: May be equal to or tighter than ±1%
Power Rating: May be equal to or greater than 0.125W
Temperature Coefficient: May be equal to or lower than ±50ppm/°C
Features: May include additional certifications (AEC-Q200, Anti-Sulfur) without affecting base functionality

All four substitute parts meet these criteria and are direct functional equivalents or upgrades to the RT0805FRE07309RL.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power Rating	Temp Coeff	Package	Features	RoHS Status
RT0805FRE07309RL	YAGEO	309 Ohms	±1%	0.125W	±50ppm/°C	0805	—	ROHS3
RT0805BRD07309RL	YAGEO	309 Ohms	±0.1%	0.125W	±25ppm/°C	0805	—	ROHS3
6-2176091-9	TE Connectivity	309 Ohms	±0.1%	0.25W	±25ppm/°C	0805	—	ROHS3
ERA-6AEB3090V	Panasonic	309 Ohms	±0.1%	0.125W	±25ppm/°C	0805	AEC-Q200	ROHS3
RG2012P-3090-B-T5	Susumu	309 Ohms	±0.1%	0.125W	±25ppm/°C	0805	Anti-Sulfur, AEC-Q200	ROHS3

Engineering Selection Recommendations

RT0805BRD07309RL (YAGEO): Direct upgrade from the primary part with tighter tolerance (±0.1% vs ±1%) and improved temperature coefficient (±25ppm/°C vs ±50ppm/°C). Same manufacturer, power rating, and package. Suitable for applications requiring enhanced precision without automotive qualification requirements.

6-2176091-9 (TE Connectivity): Provides increased power dissipation capability (0.25W vs 0.125W) with tighter tolerance and improved temperature stability. Appropriate for designs with higher thermal margins or where component derating is a consideration. Maintains standard industrial compliance.

ERA-6AEB3090V (Panasonic): Offers tighter tolerance and improved temperature coefficient with AEC-Q200 automotive qualification. Suitable for automotive and harsh environment applications requiring automotive-grade reliability standards.

RG2012P-3090-B-T5 (Susumu): Combines AEC-Q200 automotive qualification with anti-sulfur protection and tighter tolerance specifications. Lowest seated height (0.020" vs 0.024") among alternatives. Recommended for automotive applications in corrosive environments or where component height constraints exist.

All substitute parts maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Frequently Asked Questions (FAQ)

Q: Can RT0805BRD07309RL be used as a direct replacement for RT0805FRE07309RL?

A: Yes. Both parts share identical resistance, power rating, package, and operating temperature range. RT0805BRD07309RL provides tighter tolerance (±0.1% vs ±1%) and lower temperature coefficient (±25ppm/°C vs ±50ppm/°C), making it a functional upgrade with no compatibility concerns.

Q: What is the difference between the 0.125W and 0.25W power ratings?

A: Power rating indicates maximum continuous power dissipation. The 6-2176091-9 (0.25W) can safely dissipate twice the power of the primary part (0.125W). In circuits where the primary part operates below 0.125W, either rating is acceptable. Higher power rating provides additional thermal margin but does not affect electrical performance at equivalent current levels.

Q: Are the automotive-qualified parts (ERA-6AEB3090V and RG2012P-3090-B-T5) necessary for non-automotive applications?

A: No. Automotive qualification (AEC-Q200) is not required for standard industrial or consumer applications. These parts are suitable for any application but offer additional reliability assurance for automotive use. Selection should be based on application requirements, not qualification status alone.

Q: Does package height variation affect PCB layout compatibility?

A: All parts use 0805 (2012 Metric) package with maximum seated heights between 0.020" and 0.026". These minor variations (0.006" maximum difference) are within standard PCB assembly tolerances and do not require layout modifications. Verify with your assembly partner if height-critical applications exist.

Q: Can tolerance specifications be mixed within a single circuit?

A: Yes. Mixing ±1% and ±0.1% tolerance parts in the same circuit is electrically valid. However, circuit performance may vary depending on tolerance-sensitive functions. For precision analog circuits, consistent tolerance specifications across related components are recommended.

Q: What does ROHS3 compliance mean?

A: ROHS3 (Restriction of Hazardous Substances Directive 3) compliance indicates the part contains no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls, or polybrominated diphenyl ethers above specified thresholds. All listed parts meet this requirement.

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