RJ0805FRE079R1L Equivalent & Substitute Parts

Part Overview

The RJ0805FRE079R1L is a 9.1 Ohms ±1% thin film chip resistor in 0805 (2012 Metric) package rated at 0.1W (1/10W) power dissipation. Manufactured by YAGEO, this component features moisture-resistant construction with a temperature coefficient of ±50ppm/°C and operating range of -55°C to 125°C. The part is currently listed as obsolete, necessitating identification of equivalent and substitute components for ongoing design support and procurement.

Key Parameters

Parameter	Value
Resistance	9.1 Ohms
Tolerance	±1%
Power Rating	0.1W (1/10W)
Package / Case	0805 (2012 Metric)
Composition	Thin Film
Temperature Coefficient	±50ppm/°C
Operating Temperature Range	-55°C ~ 125°C
Moisture Sensitivity Level	MSL 1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the RJ0805FRE079R1L is determined by the following critical parameters:

Resistance Value: All substitutes must maintain 9.1 Ohms nominal resistance
Package / Case: All substitutes must use 0805 (2012 Metric) package for PCB compatibility
Composition: Thin film construction is required to maintain electrical performance characteristics
Moisture Sensitivity Level: MSL 1 (Unlimited) is acceptable for all substitutes
Tolerance & Power Rating: Substitutes with equal or tighter tolerance and equal or higher power rating are acceptable
Temperature Coefficient & Operating Range: Substitutes with equal or lower temperature coefficient and equal or extended operating range are acceptable

The identified substitutes are grouped into three categories based on performance enhancement:

Direct Upgrades (Active Status): RT0805DRE079R1L and RT0805FRE079R1L offer improved power rating (0.125W vs 0.1W) and extended operating temperature range (-55°C ~ 155°C vs -55°C ~ 125°C) while maintaining the same package and resistance value.
Performance Enhancement (Active Status): CPF0805B9R1E1 provides tighter tolerance (±0.1% vs ±1%), lower temperature coefficient (±25ppm/°C vs ±50ppm/°C), and extended operating range, maintaining identical power rating and package.
Automotive-Qualified Alternatives (Active Status): RNCF0805BTC9R10 and RNCF0805DTC9R10 offer higher power rating (0.25W vs 0.1W), AEC-Q200 automotive qualification, and extended operating range, with tolerance options of ±0.1% and ±0.5% respectively.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power Rating	Temp Coeff	Operating Temp	Product Status	RoHS Status
RJ0805FRE079R1L	YAGEO	9.1 Ω	±1%	0.1W	±50ppm/°C	-55°C ~ 125°C	Obsolete	Not Specified
RT0805DRE079R1L	YAGEO	9.1 Ω	±0.5%	0.125W	±50ppm/°C	-55°C ~ 155°C	Active	ROHS3 Compliant
RT0805FRE079R1L	YAGEO	9.1 Ω	±1%	0.125W	±50ppm/°C	-55°C ~ 155°C	Active	ROHS3 Compliant
CPF0805B9R1E1	TE Connectivity	9.1 Ω	±0.1%	0.1W	±25ppm/°C	-55°C ~ 155°C	Active	ROHS3 Compliant
RNCF0805BTC9R10	Stackpole Electronics	9.1 Ω	±0.1%	0.25W	±50ppm/°C	-55°C ~ 155°C	Active	ROHS3 Compliant
RNCF0805DTC9R10	Stackpole Electronics	9.1 Ω	±0.5%	0.25W	±50ppm/°C	-55°C ~ 155°C	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement with Enhanced Specifications: RT0805FRE079R1L (YAGEO) is the preferred substitute when tolerance matching is required. It maintains ±1% tolerance identical to the original part while providing increased power rating (0.125W) and extended operating temperature range (-55°C ~ 155°C). Active product status and ROHS3 compliance ensure long-term availability and regulatory compliance.

For Improved Tolerance and Temperature Stability: CPF0805B9R1E1 (TE Connectivity) is suitable for applications requiring tighter tolerance control (±0.1%) and lower temperature coefficient (±25ppm/°C). This part maintains the original 0.1W power rating and provides extended operating range. ROHS3 compliance and active status support procurement continuity.

For Higher Power Dissipation with Automotive Qualification: RNCF0805BTC9R10 or RNCF0805DTC9R10 (Stackpole Electronics) are appropriate for designs requiring increased power handling (0.25W) and automotive-grade reliability (AEC-Q200). Both parts maintain 0805 package compatibility and offer tolerance options (±0.1% or ±0.5%). Active product status and ROHS3 compliance are confirmed.

For Tolerance Optimization Without Power Increase: RT0805DRE079R1L (YAGEO) provides tighter tolerance (±0.5%) with modest power increase (0.125W) and extended operating range, suitable for precision applications requiring improved accuracy over the original ±1% specification.

All substitute parts maintain MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard PCB assembly and storage conditions.

Frequently Asked Questions (FAQ)

Q: Can RT0805FRE079R1L be used as a direct replacement for RJ0805FRE079R1L? A: Yes. Both parts share identical resistance (9.1 Ohms), tolerance (±1%), and 0805 package. RT0805FRE079R1L offers improved power rating (0.125W vs 0.1W) and extended operating temperature range (-55°C ~ 155°C vs -55°C ~ 125°C), making it a compatible upgrade with enhanced specifications.

Q: What is the difference between the YAGEO RT series substitutes? A: RT0805DRE079R1L provides ±0.5% tolerance with 0.125W power rating. RT0805FRE079R1L maintains ±1% tolerance (matching the original) with 0.125W power rating. Both offer identical operating temperature range and package. Selection depends on tolerance requirements of the application.

Q: Why is CPF0805B9R1E1 listed as a substitute if it has different power rating? A: CPF0805B9R1E1 maintains the original 0.1W power rating while providing superior tolerance (±0.1% vs ±1%) and lower temperature coefficient (±25ppm/°C vs ±50ppm/°C). It is suitable for applications where the original power rating is adequate but improved accuracy and thermal stability are beneficial.

Q: Are the Stackpole RNCF parts suitable for non-automotive applications? A: Yes. RNCF0805BTC9R10 and RNCF0805DTC9R10 are AEC-Q200 qualified but function as standard 0805 chip resistors in non-automotive circuits. The higher power rating (0.25W) and active product status make them viable substitutes for general applications requiring increased power dissipation margin.

Q: Do all substitute parts maintain the same physical dimensions? A: All substitutes use the 0805 (2012 Metric) package with identical length (0.079" / 2.00mm) and width (0.049" / 1.25mm). Height variations are minimal (0.024" to 0.026" seated height), ensuring PCB layout compatibility without modification.

Q: What is the significance of ROHS3 compliance for these substitutes? A: ROHS3 compliance confirms that substitute parts meet Restriction of Hazardous Substances Directive requirements, ensuring regulatory compliance for products sold in regulated markets. All active substitute parts listed carry ROHS3 certification.

Q: Can these parts be used interchangeably in existing designs? A: Interchangeability depends on application requirements. All substitutes maintain 9.1 Ohms resistance and 0805 package compatibility. Designs with strict tolerance, power dissipation, or temperature coefficient requirements should reference the parameter comparison table to confirm suitability before implementation.

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