RNF14FTC78R7 Equivalent & Substitute Parts

Part Overview

The RNF14FTC78R7 is a 78.7 Ohm ±1% metal film axial through-hole resistor rated at 0.25W (1/4W) manufactured by Stackpole Electronics Inc. This component features flame retardant coating and safety-grade construction, designed for applications requiring precision resistance with reliable thermal performance across -55°C to 155°C operating range. The part is Active status and RoHS3 compliant. Substitute parts are identified to provide alternative sourcing options with equivalent or enhanced electrical and mechanical characteristics.

Substiute Parts

RNF14FTC78R7

Stackpole Electronics IncIn Stock: 1067RNF14FTC78R7 Datasheet

Current PartRFQ

CMF5578R700FHEB

Vishay DaleIn Stock: 6267CMF5578R700FHEB Datasheet

UpgradeRFQ

CMF5078R700FHEB

Vishay DaleIn Stock: 1091CMF5078R700FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNF14FTC78R7 are qualified based on the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Resistance value: 78.7 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Composition: Metal Film (exact match required)
• Package: Axial through-hole (exact match required)
• Temperature Coefficient: ±50ppm/°C (exact match required)

Secondary Compatibility Parameters:

• Power rating: Equal or greater than 0.25W
• Operating temperature range: Must encompass or exceed -55°C ~ 155°C
• RoHS compliance: ROHS3 Compliant (maintained)
• Termination count: 2 (exact match required)

The identified substitutes meet all primary criteria and maintain or exceed secondary parameters, ensuring functional and thermal compatibility within the specified operating envelope.

Parameter Comparison

Engineering Selection Recommendations

CMF5578R700FHEB (Upgrade Option): This substitute provides enhanced thermal performance with 0.5W power rating versus the original 0.25W, extending operating temperature range to 175°C. Moisture-resistant construction adds environmental protection. Maintains all electrical specifications and RoHS3 compliance. Suitable for applications requiring increased thermal margin or enhanced environmental durability.

CMF5078R700FHEB (MFR Recommended Option): This substitute maintains identical power rating (0.25W) and electrical specifications as the main part while offering extended operating temperature range to 175°C and moisture-resistant construction. Smaller physical dimensions (0.065" Dia x 0.150" L versus 0.093" Dia x 0.250" L) may provide space advantages in compact layouts. RoHS3 compliant. Recommended for direct replacement where thermal margin and environmental protection are beneficial.

Both substitutes are Active status products with established inventory availability and full regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can CMF5578R700FHEB replace RNF14FTC78R7 in all applications? A: Yes. The CMF5578R700FHEB meets all primary electrical specifications (78.7 Ohms, ±1%, Metal Film, ±50ppm/°C) and exceeds thermal performance with 0.5W rating and 175°C maximum operating temperature. Physical dimensions are comparable (0.090" Dia x 0.240" L). Axial package and 2-termination configuration ensure mechanical compatibility.

Q: What is the difference between the two substitute parts? A: CMF5578R700FHEB provides 0.5W power rating (upgrade), while CMF5078R700FHEB maintains 0.25W (direct equivalent). Both extend operating temperature to 175°C and add moisture resistance. CMF5078R700FHEB has smaller physical dimensions. Selection depends on thermal requirements and available board space.

Q: Are the substitute parts physically interchangeable? A: Yes. All three parts use Axial through-hole package with 2 terminations. Hole spacing and lead diameter are compatible. CMF5078R700FHEB is physically smaller but functionally interchangeable in standard through-hole layouts.

Q: Do the substitutes maintain RoHS3 compliance? A: Yes. Both CMF5578R700FHEB and CMF5078R700FHEB are RoHS3 compliant, matching the original part's regulatory status.

Q: What is the temperature coefficient difference? A: All three parts share identical temperature coefficient of ±50ppm/°C, ensuring equivalent frequency stability and thermal drift characteristics across the operating range.