RCS08055R90FKEA Equivalent & Substitute Parts

Part Overview

The RCS08055R90FKEA is a 5.9 Ohm ±1% thick film chip resistor manufactured by Vishay Dale in the 0805 (2012 Metric) package format. This component is rated for 0.5W power dissipation and meets AEC-Q200 automotive qualification standards with pulse withstanding capability. The part is currently in active production status with 848 units available in inventory. Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing, inventory constraints, or specific manufacturing preferences while maintaining electrical and mechanical compatibility.

Substiute Parts

RCS08055R90FKEA

Vishay DaleIn Stock: 930RCS08055R90FKEA Datasheet

Current PartRFQ

ESR10EZPF5R90

Rohm SemiconductorIn Stock: 5086ESR10EZPF5R90 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RCS08055R90FKEA is determined by the following critical parameters:

Electrical Parameters: Resistance value (5.9 Ohms), tolerance (±1%), and temperature coefficient (±100ppm/°C) must match exactly. These parameters ensure functional equivalence in circuit operation.

Mechanical Parameters: Package format must be 0805 (2012 Metric) to ensure physical compatibility with PCB layouts and assembly processes.

Power Rating Consideration: The substitute part ESR10EZPF5R90 is rated at 0.4W (2/5W), which is lower than the main part's 0.5W rating. This represents a functional limitation and requires circuit-level thermal analysis to confirm suitability for the intended application.

Automotive Compliance: Both parts maintain AEC-Q200 qualification, thick film composition, pulse withstanding capability, and identical operating temperature range (-55°C ~ 155°C).

Environmental Compliance: Both parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating.

Parameter Comparison

Engineering Selection Recommendations

The ESR10EZPF5R90 from Rohm Semiconductor qualifies as a direct substitute based on matching electrical specifications (5.9 Ohms ±1%, ±100ppm/°C temperature coefficient), identical package format (0805), and equivalent automotive compliance (AEC-Q200). Both parts maintain thick film composition, pulse withstanding capability, and identical operating temperature range.

The primary design consideration is the power rating differential: the substitute part is rated at 0.4W versus the main part's 0.5W. Circuit designers must confirm that the lower power rating does not exceed thermal limits in the intended application. The substitute part exhibits a slightly greater seated height (0.026" versus 0.020"), which must be verified against PCB clearance requirements and assembly constraints.

Both parts carry active product status and maintain full compliance with ROHS3, REACH, and automotive qualification standards. Selection between these parts should be based on availability, supply chain requirements, and thermal design margins specific to the application.

Frequently Asked Questions (FAQ)

Q: Can ESR10EZPF5R90 be used as a direct replacement for RCS08055R90FKEA?

A: Electrical substitution is valid based on matching resistance (5.9 Ohms), tolerance (±1%), temperature coefficient (±100ppm/°C), and package format (0805). However, the lower power rating (0.4W versus 0.5W) requires thermal analysis to confirm suitability for the specific circuit application.

Q: What is the significance of the power rating difference?

A: The substitute part is rated at 0.4W compared to the main part's 0.5W. This 20% reduction in power dissipation capacity means the substitute part will reach higher temperatures under identical current conditions. Circuit designers must verify that operating currents and thermal environments remain within the substitute part's specifications.

Q: Are there physical compatibility concerns?

A: Both parts use the 0805 (2012 Metric) package with identical length and width (0.079" x 0.049"). The substitute part has a maximum seated height of 0.026" compared to 0.020" for the main part. This 0.006" difference must be evaluated against PCB clearance requirements and assembly equipment specifications.

Q: Do both parts meet automotive standards?

A: Yes. Both RCS08055R90FKEA and ESR10EZPF5R90 are AEC-Q200 qualified with pulse withstanding capability, thick film composition, and identical operating temperature range (-55°C ~ 155°C).

Q: What are the environmental compliance differences?

A: Both parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating. No environmental compliance differentiation exists between these parts.

Q: Which part should be selected for new designs?

A: Selection should be based on availability, supply chain strategy, and thermal design margins. Both parts are active products with equivalent electrical and compliance characteristics. The power rating differential is the primary technical consideration requiring application-specific analysis.