RNF14FTC1K91 Equivalent & Substitute Parts

Part Overview

The RNF14FTC1K91 is a 1.91 kOhms ±1% metal film axial resistor rated at 0.25W (1/4W) manufactured by Stackpole Electronics Inc. This component features flame retardant coating and safety construction, designed for through-hole applications with an operating temperature range of -55°C to 155°C. The part is Active status and RoHS3 compliant. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained within the allowed parameter tolerances for this resistor category.

Substiute Parts

RNF14FTC1K91

Stackpole Electronics IncIn Stock: 998RNF14FTC1K91 Datasheet

Current PartRFQ

CMF551K9100FHEB

Vishay DaleIn Stock: 2377CMF551K9100FHEB Datasheet

UpgradeRFQ

CMF501K9100FHEB

Vishay DaleIn Stock: 1655CMF501K9100FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the RNF14FTC1K91 is determined by the following critical parameters:

• Resistance value: 1.91 kOhms (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)

Substitute parts must maintain these core electrical and mechanical specifications. Power rating may be equal or higher without affecting circuit compatibility. Operating temperature range may be extended. Physical dimensions may vary within axial package constraints. Packaging format (Tape & Reel vs. Cut Tape) does not affect electrical equivalence.

Parameter Comparison

Engineering Selection Recommendations

Both CMF551K9100FHEB and CMF501K9100FHEB are Active status components manufactured by Vishay Dale and maintain full RoHS3 compliance equivalent to the RNF14FTC1K91.

CMF501K9100FHEB provides direct electrical and power rating equivalence to the RNF14FTC1K91, with identical 0.25W power specification and matching tolerance and temperature coefficient. This part offers extended operating temperature range to 175°C and includes moisture resistant features.

CMF551K9100FHEB provides higher power dissipation capability at 0.5W (1/2W) while maintaining all other electrical parameters. This upgrade option is suitable for applications requiring additional thermal margin or higher power handling without circuit redesign.

Both substitute parts are RoHS3 compliant and REACH unaffected, maintaining regulatory equivalence with the original component.

Frequently Asked Questions (FAQ)

Q: Can CMF551K9100FHEB replace RNF14FTC1K91 in a 0.25W circuit application?

A: Yes. The CMF551K9100FHEB is rated for 0.5W power dissipation, which exceeds the 0.25W requirement. Higher power rating does not create incompatibility; the component will operate safely at lower power levels.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Packaging format affects handling and assembly processes but does not alter electrical performance. Tape & Reel is suitable for automated assembly; Cut Tape is suitable for manual or mixed assembly environments. Both formats contain identical components.

Q: Are the physical dimensions of substitute parts compatible with the original PCB layout?

A: All three parts use axial package construction. RNF14FTC1K91 measures 0.093" Dia x 0.250" L. CMF551K9100FHEB measures 0.090" Dia x 0.240" L. CMF501K9100FHEB measures 0.065" Dia x 0.150" L. Axial lead spacing and hole pattern compatibility must be verified for specific PCB designs, as physical dimensions vary.

Q: Do substitute parts maintain the same temperature coefficient?

A: Yes. All three parts specify ±50ppm/°C temperature coefficient, ensuring equivalent frequency stability and thermal performance characteristics.

Q: Is moisture resistance a critical parameter for substitution?

A: Moisture resistance is an additional feature provided by the Vishay Dale substitute parts but is not a core substitution requirement. The original RNF14FTC1K91 does not specify moisture resistance; substitute parts with this feature provide enhanced environmental protection without affecting electrical equivalence.