RN55E4990FRE6 Equivalent & Substitute Parts

Part Overview

The RN55E4990FRE6 is a 499 Ohms ±1% metal film through-hole resistor rated at 0.125W (1/8W) in axial package configuration. This component is manufactured by Vishay Dale and complies with military specification MIL-R-10509/7. The resistor features flame retardant coating, moisture resistance, and safety-rated construction suitable for military and high-reliability applications. The part is currently active in production with 756 units in stock.

Substitute parts are identified when equivalent electrical performance can be maintained while accommodating different packaging formats or enhanced tolerance specifications within the same product family and series.

Substiute Parts

RN55E4990FRE6

Vishay DaleIn Stock: 790RN55E4990FRE6 Datasheet

Current PartRFQ

RN55E4990BRE6

Vishay DaleIn Stock: 1782RN55E4990BRE6 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

The RN55E4990BRE6 qualifies as a substitute for the RN55E4990FRE6 based on the following substitution criteria:

Matching Parameters:

• Resistance value: 499 Ohms (identical)
• Power rating: 0.125W (1/8W) (identical)
• Composition: Metal Film (identical)
• Package type: Axial (identical)
• Temperature coefficient: ±25ppm/°C (identical)
• Operating temperature range: -65°C to 175°C (identical)
• Series: Military, MIL-R-10509/7, RN55 (identical)
• Physical dimensions: 0.090" Dia x 0.240" L (2.29mm x 6.10mm) (identical)
• Features: Flame Retardant Coating, Military, Moisture Resistant, Safety (identical)

Differentiating Parameter:

• Tolerance: RN55E4990BRE6 provides ±0.1% tolerance versus ±1% tolerance of the main part
• Packaging format: RN55E4990BRE6 supplied in Cut Tape (CT) versus Tape & Reel (TR) for the main part

The substitute part maintains all critical electrical and mechanical specifications while offering enhanced tolerance performance and alternative packaging configuration.

Parameter Comparison

Engineering Selection Recommendations

Both the RN55E4990FRE6 and RN55E4990BRE6 are active production components from Vishay Dale within the military-grade RN55 series. Selection between these parts depends on application-specific requirements:

RN55E4990FRE6 (Tape & Reel packaging) is appropriate for high-volume automated assembly operations where reel-based component feeding is standard practice.

RN55E4990BRE6 (Cut Tape packaging) is appropriate for applications requiring enhanced tolerance specification (±0.1% versus ±1%) or where cut tape packaging format aligns with assembly processes. This variant provides tighter resistance tolerance while maintaining identical electrical performance and military compliance.

Both parts maintain identical compliance status regarding RoHS non-compliance and REACH affected designation. Selection should be based on packaging format requirements and tolerance specifications demanded by circuit design parameters.

Frequently Asked Questions (FAQ)

Q: Can RN55E4990BRE6 directly replace RN55E4990FRE6 in existing designs?

A: Yes. Both parts share identical resistance value (499 Ohms), power rating (0.125W), temperature coefficient (±25ppm/°C), operating temperature range (-65°C to 175°C), physical dimensions (0.090" Dia x 0.240" L), and military series designation (MIL-R-10509/7). The primary differences are packaging format (Cut Tape versus Tape & Reel) and tolerance specification (±0.1% versus ±1%).

Q: What is the significance of the tolerance difference between these parts?

A: RN55E4990BRE6 provides ±0.1% tolerance compared to ±1% tolerance for RN55E4990FRE6. This means the substitute part maintains resistance value within a tighter range. Applications requiring precise resistance values benefit from the enhanced tolerance specification of the RN55E4990BRE6.

Q: Are there packaging compatibility considerations?

A: Yes. RN55E4990FRE6 is supplied in Tape & Reel (TR) format suitable for automated reel-fed assembly equipment. RN55E4990BRE6 is supplied in Cut Tape (CT) format suitable for manual or semi-automated assembly processes. Verify that your assembly equipment or process accommodates the packaging format of the selected part.

Q: Do both parts meet the same military specifications?

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

Q: What is the inventory status for each part?

A: RN55E4990FRE6 has 756 units in stock. RN55E4990BRE6 has 1716 units in stock. Both are active production components.