RN55D3003FB14 Equivalent & Substitute Parts

Part Overview

The RN55D3003FB14 is a 300 kOhms ±1% 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 per MIL-R-10509/7 specification, this component features flame retardant coating and moisture-resistant construction suitable for military and high-reliability applications. The part maintains active product status with 1143 units in current inventory. Substitute parts may be required due to design upgrades, tolerance tightening, or temperature coefficient optimization while maintaining identical electrical and mechanical compatibility.

Substiute Parts

RN55D3003FB14

Vishay DaleIn Stock: 1206RN55D3003FB14 Datasheet

Current PartRFQ

RN55E3003BB14

Vishay DaleIn Stock: 1415RN55E3003BB14 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of RN55D3003FB14 with RN55E3003BB14 is permissible based on the following criteria:

Identical Parameters (Required for Direct Substitution):

• Resistance value: 300 kOhms
• Power rating: 0.125W (1/8W)
• Package type: Axial
• Physical dimensions: 0.090" Dia x 0.240" L (2.29mm x 6.10mm)
• Operating temperature range: -65°C to 175°C
• Composition: Metal Film
• Series: Military, MIL-R-10509/7, RN55
• Features: Flame Retardant Coating, Military, Moisture Resistant, Safety
• Termination count: 2

Enhanced Parameters (Upgrade Characteristics):

• Tolerance: ±0.1% (tighter than ±1%)
• Temperature coefficient: ±25ppm/°C (improved from ±100ppm/°C)

The RN55E3003BB14 represents an upgrade path maintaining full electrical and mechanical compatibility while providing superior tolerance and thermal stability characteristics.

Parameter Comparison

Engineering Selection Recommendations

Both RN55D3003FB14 and RN55E3003BB14 maintain active product status and identical compliance profiles (RoHS non-compliant, REACH Affected, ECCN EAR99). Selection between these parts depends on application tolerance requirements:

RN55D3003FB14 is appropriate for applications where ±1% tolerance and ±100ppm/°C temperature coefficient meet circuit specifications.

RN55E3003BB14 is suitable for applications requiring tighter tolerance control (±0.1%) and improved temperature stability (±25ppm/°C) while maintaining identical mechanical fit and military-grade construction. This substitute provides enhanced performance characteristics within the same physical envelope and operating range.

Frequently Asked Questions (FAQ)

Q: Can RN55E3003BB14 directly replace RN55D3003FB14 in existing designs?

A: Yes. Both parts share identical resistance value (300 kOhms), power rating (0.125W), axial package configuration, physical dimensions (0.090" Dia x 0.240" L), and operating temperature range (-65°C to 175°C). No PCB layout or mechanical modifications are required.

Q: What are the key differences between these parts?

A: The primary differences are tolerance specification (±1% versus ±0.1%) and temperature coefficient (±100ppm/°C versus ±25ppm/°C). RN55E3003BB14 provides superior tolerance and thermal stability.

Q: Are there any compliance or certification differences?

A: Both parts share identical compliance status: RoHS non-compliant, REACH Affected, and ECCN EAR99 classification. Military-grade construction and MIL-R-10509/7 series designation apply to both.

Q: Which part should be selected for high-precision applications?

A: RN55E3003BB14 is the appropriate selection for circuits requiring tighter tolerance control and reduced temperature coefficient drift.

Q: Are both parts currently available?

A: Yes. RN55D3003FB14 has 1143 units in inventory, and RN55E3003BB14 has 1380 units in current stock.