RN55C3000FB14 Equivalent & Substitute Parts

Part Overview

The RN55C3000FB14 is a 300 Ohm, 1/8W metal film through-hole resistor manufactured by Vishay Dale, designed for military applications per MIL-R-10509/7 specification. This axial component features flame retardant coating, moisture resistance, and safety-rated construction suitable for high-reliability electronic assemblies. The part is currently active in production with 818 units in stock. Substitute parts are identified when equivalent resistance values, power ratings, and package configurations are required while accommodating variations in tolerance specifications and temperature coefficients within acceptable engineering parameters.

Substiute Parts

RN55C3000FB14

Vishay DaleIn Stock: 904RN55C3000FB14 Datasheet

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RN55E3000BB14

Vishay DaleIn Stock: 1426RN55E3000BB14 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the RN55C3000FB14 is permissible when the following core parameters remain constant or are enhanced:

• Resistance value: 300 Ohms (exact match required)
• Power rating: 0.125W minimum (equal or higher acceptable)
• Package type: Axial (physical compatibility)
• Composition: Metal Film (electrical performance consistency)
• Operating temperature range: -65°C to 175°C minimum (equal or wider range acceptable)
• Military series compliance: MIL-R-10509/7, RN55 base product number

Tolerance and temperature coefficient may vary within acceptable limits for the application, provided the substitute part maintains or improves upon the original specification. The RN55E3000BB14 qualifies as a direct substitute based on these criteria, offering enhanced tolerance (±0.1% versus ±1%) and improved temperature coefficient (±25ppm/°C versus ±50ppm/°C) while maintaining all core electrical and mechanical parameters.

Parameter Comparison

Engineering Selection Recommendations

Both the RN55C3000FB14 and RN55E3000BB14 are active production components manufactured by Vishay Dale under the military MIL-R-10509/7 specification. Selection between these parts depends on application-specific tolerance and stability requirements. The RN55C3000FB14 provides standard military-grade performance with ±1% tolerance and ±50ppm/°C temperature coefficient. The RN55E3000BB14 offers enhanced precision with ±0.1% tolerance and ±25ppm/°C temperature coefficient, suitable for applications requiring tighter component matching or improved frequency stability. Both parts maintain identical electrical power ratings, operating temperature ranges, and physical dimensions, ensuring direct mechanical and electrical interchangeability. Compliance status remains consistent between both options, with identical RoHS non-compliant and REACH Affected designations.

Frequently Asked Questions (FAQ)

Q: Can RN55E3000BB14 directly replace RN55C3000FB14 in existing designs?

A: Yes. Both parts share identical resistance values (300 Ohms), power ratings (0.125W), package types (Axial), physical dimensions (0.090" Dia x 0.240" L), and operating temperature ranges (-65°C to 175°C). The RN55E3000BB14 provides enhanced tolerance and temperature coefficient specifications, making it a direct mechanical and electrical substitute.

Q: What are the key differences between these two resistors?

A: The primary differences are tolerance and temperature coefficient. RN55C3000FB14 specifies ±1% tolerance with ±50ppm/°C temperature coefficient, while RN55E3000BB14 specifies ±0.1% tolerance with ±25ppm/°C temperature coefficient. All other electrical and mechanical parameters remain identical.

Q: Are both parts compliant with military specifications?

A: Both parts comply with MIL-R-10509/7 military specification and are part of the RN55 series. Both maintain identical military-grade features including flame retardant coating, moisture resistance, and safety construction.

Q: What is the physical compatibility between these parts?

A: Both resistors are axial through-hole components with identical dimensions of 0.090" diameter by 0.240" length (2.29mm x 6.10mm). They are mechanically interchangeable in PCB layouts designed for either part.

Q: Do these parts have different environmental compliance ratings?

A: No. Both parts share identical RoHS non-compliant and REACH Affected designations. Environmental compliance status does not differ between the two options.