RNF14FAD1K91 Equivalent & Substitute Parts

Part Overview

The RNF14FAD1K91 is a 1.91 kOhms ±1% metal film through-hole resistor rated at 0.25W (1/4W) in axial package configuration, manufactured by Stackpole Electronics Inc. This component features flame retardant coating and safety-grade construction suitable for general-purpose electronic applications requiring precision resistance values. The part is currently active in production with 846 units in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained within the allowed parameter tolerances for this resistor category.

Substiute Parts

RNF14FAD1K91

Stackpole Electronics IncIn Stock: 890RNF14FAD1K91 Datasheet

Current PartRFQ

RNF14FTD1K91

Stackpole Electronics IncIn Stock: 7047RNF14FTD1K91 Datasheet

DirectRFQ

CMF551K9100FHEB

Vishay DaleIn Stock: 2377CMF551K9100FHEB Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNF14FAD1K91 are classified based on the following substitution criteria:

Direct Equivalent (Same Electrical & Mechanical Specifications):

• Identical resistance value: 1.91 kOhms
• Identical tolerance: ±1%
• Identical power rating: 0.25W (1/4W)
• Identical composition: Metal Film
• Identical package: Axial
• Identical operating temperature range: -55°C ~ 155°C
• Identical temperature coefficient: ±100ppm/°C
• Identical RoHS compliance: ROHS3 Compliant

Upgrade Substitute (Enhanced Specifications):

• Identical resistance value: 1.91 kOhms
• Identical tolerance: ±1%
• Higher power rating: 0.5W (1/2W) — provides increased thermal headroom
• Identical composition: Metal Film
• Identical package: Axial
• Extended operating temperature range: -55°C ~ 175°C — provides wider thermal margin
• Improved temperature coefficient: ±50ppm/°C — provides better stability
• Identical RoHS compliance: ROHS3 Compliant

Parameter Comparison

Engineering Selection Recommendations

RNF14FTD1K91 (Direct Equivalent): Select this substitute when packaging format change from Tape & Box to Cut Tape is acceptable. This part maintains identical electrical and thermal specifications while offering higher inventory availability (7022 units). Both parts are manufactured by Stackpole Electronics Inc and carry identical RoHS3 compliance certification.

CMF551K9100FHEB (Upgrade Substitute): Select this substitute when circuit design permits higher power dissipation capability. The CMF551K9100FHEB provides enhanced thermal performance (0.5W vs. 0.25W rating) and extended operating temperature range (-55°C ~ 175°C vs. -55°C ~ 155°C), along with improved temperature stability (±50ppm/°C vs. ±100ppm/°C). This part is manufactured by Vishay Dale and maintains ROHS3 compliance. The upgrade substitute is suitable for applications requiring greater thermal margin or operation at elevated temperatures.

Frequently Asked Questions (FAQ)

Q: Can RNF14FTD1K91 be used as a direct replacement for RNF14FAD1K91?

A: Yes. Both parts share identical electrical specifications (1.91 kOhms ±1%, 0.25W, metal film composition, axial package) and identical operating parameters (temperature range -55°C ~ 155°C, temperature coefficient ±100ppm/°C). The only difference is packaging format: RNF14FAD1K91 is supplied in Tape & Box format while RNF14FTD1K91 is supplied in Cut Tape format.

Q: When should CMF551K9100FHEB be selected over the direct equivalent?

A: Select CMF551K9100FHEB when the circuit design requires higher power dissipation capability (0.5W vs. 0.25W) or when operation at temperatures above 155°C is necessary. The extended temperature range to 175°C and improved temperature coefficient (±50ppm/°C) provide additional design margin for demanding applications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. RNF14FAD1K91, RNF14FTD1K91, and CMF551K9100FHEB are all ROHS3 compliant and REACH unaffected.

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

A: Tape & Box packaging includes both tape reel and protective box for storage and handling. Cut Tape packaging provides individual components cut from the reel without the box. Both formats contain identical components; the difference is in delivery and storage format.

Q: Can the upgrade substitute CMF551K9100FHEB be used in all applications designed for RNF14FAD1K91?

A: Yes. The CMF551K9100FHEB maintains identical resistance value and tolerance while providing enhanced specifications. Higher power rating and extended temperature range are backward-compatible with designs specified for the lower-rated component.