RN55C4002CB14 Equivalent & Substitute Parts

Part Overview

The RN55C4002CB14 is a 40 kOhms ±0.25% metal film through-hole resistor rated at 0.125W (1/8W) in axial package configuration. Manufactured by Vishay Dale under the military-grade RN55 series (MIL-R-10509/7), this component features flame retardant coating, moisture resistance, and safety certification suitable for military and high-reliability applications. The part is currently active in production with 1162 units in stock.

Equivalent and substitute parts are identified when they maintain identical or superior electrical and mechanical specifications while preserving functional compatibility within the same package and series classification.

Substiute Parts

RN55C4002CB14

Vishay DaleIn Stock: 1217RN55C4002CB14 Datasheet

Current PartRFQ

RN55E4002BB14

Vishay DaleIn Stock: 926RN55E4002BB14 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RN55C4002CB14 is determined by the following criteria:

Critical Parameters (Must Match):

• Resistance value: 40 kOhms
• Power rating: 0.125W (1/8W)
• Package type: Axial
• Composition: Metal Film
• Operating temperature range: -65°C to 175°C
• Series classification: Military, MIL-R-10509/7, RN55

Allowable Variation Parameters:

• Tolerance: Equal or tighter (lower tolerance values are acceptable upgrades)
• Temperature coefficient: Equal or lower absolute value (lower temperature coefficient values are acceptable upgrades)

The RN55E4002BB14 qualifies as a direct substitute because it maintains all critical parameters while providing improved tolerance (±0.1% versus ±0.25%) and superior temperature coefficient stability (±25ppm/°C versus ±50ppm/°C).

Parameter Comparison

Engineering Selection Recommendations

The RN55E4002BB14 is a qualified substitute for the RN55C4002CB14 in all applications where the main part is specified. Both components share identical military classification (MIL-R-10509/7), RoHS non-compliance status, REACH affected designation, and ECCN/HTSUS coding. The substitute part provides enhanced performance through tighter tolerance (±0.1% versus ±0.25%) and improved temperature coefficient stability (±25ppm/°C versus ±50ppm/°C), making it suitable for precision circuit applications requiring superior component stability. Both parts maintain identical physical dimensions, electrical ratings, and environmental operating specifications, ensuring direct mechanical and electrical interchangeability.

Frequently Asked Questions (FAQ)

Q: Can RN55E4002BB14 be used as a direct replacement for RN55C4002CB14?

A: Yes. The RN55E4002BB14 is a direct substitute. It maintains identical resistance value, power rating, package configuration, and operating temperature range. The substitute provides improved tolerance and temperature coefficient performance.

Q: What are the key differences between these parts?

A: The primary differences are tolerance specification (±0.1% versus ±0.25%) and temperature coefficient (±25ppm/°C versus ±50ppm/°C). The RN55E4002BB14 offers superior precision and thermal stability. All other electrical and mechanical parameters remain identical.

Q: Are the physical dimensions identical?

A: Yes. Both parts measure 0.090" diameter by 0.240" length (2.29mm x 6.10mm) in axial package configuration. They are mechanically interchangeable on PCBs designed for either part.

Q: Do both parts meet the same military specifications?

A: Yes. Both components are classified under the Military RN55 series and comply with MIL-R-10509/7 specifications. They share identical RoHS status, REACH classification, and regulatory coding.

Q: Which part should be selected for new designs?

A: Selection depends on circuit precision requirements. For applications requiring tighter tolerance control and superior temperature stability, the RN55E4002BB14 is the preferred choice. For applications where the ±0.25% tolerance and ±50ppm/°C temperature coefficient of the RN55C4002CB14 are sufficient, either part is acceptable.