RN55C4990CBSL Equivalent & Substitute Parts

Part Overview

The RN55C4990CBSL is a 499 Ohm, 1/8W through-hole axial resistor manufactured by Vishay Dale. This metal film resistor features flame retardant coating, military-grade construction, and moisture resistance, meeting MIL-R-10509/7 specifications. The component is currently in active production status with 874 pieces available in bulk packaging. Substitute parts are identified to address specific application requirements such as improved tolerance specifications or alternative packaging formats while maintaining core electrical and mechanical compatibility.

Substiute Parts

RN55C4990CBSL

Vishay DaleIn Stock: 906RN55C4990CBSL Datasheet

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RN55E4990BRE6

Vishay DaleIn Stock: 1782RN55E4990BRE6 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RN55C4990CBSL is determined by the following critical parameters:

• Resistance Value: Must be 499 Ohms (exact match required)
• Power Rating: Must be 0.125W / 1/8W (exact match required)
• Package Type: Must be Axial (exact match required)
• Physical Dimensions: Must be 0.090" Dia × 0.240" L (exact match required)
• Composition: Must be Metal Film (exact match required)
• Operating Temperature Range: Must support -65°C to 175°C minimum
• Series Compliance: Must meet MIL-R-10509/7 specifications

The RN55E4990BRE6 qualifies as a substitute part because it maintains identical resistance, power rating, package type, physical dimensions, and composition. The substitute offers improved tolerance (±0.1% versus ±0.25%) and lower temperature coefficient (±25ppm/°C versus ±50ppm/°C), representing an upgrade in precision characteristics while preserving all core electrical and mechanical compatibility requirements.

Parameter Comparison

Engineering Selection Recommendations

Both the RN55C4990CBSL and RN55E4990BRE6 maintain active production status and identical compliance certifications (RoHS non-compliant, REACH Affected, ECCN EAR99). The RN55E4990BRE6 represents a precision upgrade option, offering tighter tolerance (±0.1% versus ±0.25%) and improved temperature stability (±25ppm/°C versus ±50ppm/°C) while maintaining full electrical and mechanical interchangeability. Selection between these parts depends on application-specific tolerance and temperature coefficient requirements rather than compliance or availability constraints.

Frequently Asked Questions (FAQ)

Q: Can RN55E4990BRE6 be used as a direct replacement for RN55C4990CBSL?

A: Yes. Both parts share identical resistance value (499 Ohms), power rating (1/8W), axial package type, and physical dimensions (0.090" Dia × 0.240" L). The RN55E4990BRE6 provides improved tolerance and temperature coefficient specifications, making it functionally compatible in all applications where the RN55C4990CBSL is specified.

Q: What is the primary difference between these two parts?

A: The RN55E4990BRE6 offers superior precision characteristics: tolerance of ±0.1% compared to ±0.25%, and temperature coefficient of ±25ppm/°C compared to ±50ppm/°C. Both parts are military-grade metal film resistors with identical operating temperature range (-65°C to 175°C) and packaging dimensions.

Q: Does packaging format affect electrical performance?

A: No. The RN55C4990CBSL is supplied in Bulk packaging while the RN55E4990BRE6 is supplied in Cut Tape (CT) format. Packaging format does not affect electrical characteristics or performance; it addresses supply chain and assembly process requirements only.

Q: Are both parts compliant with military specifications?

A: Yes. Both the RN55C4990CBSL and RN55E4990BRE6 comply with MIL-R-10509/7 military specifications and are part of the RN55 series. Both feature flame retardant coating, moisture resistance, and safety-rated construction.

Q: What compliance certifications apply to both parts?

A: Both parts share identical compliance status: RoHS non-compliant, REACH Affected, and ECCN EAR99 classification. Regulatory compliance does not differentiate these substitute options.