RNF14FTC133K Equivalent & Substitute Parts

Part Overview

The RNF14FTC133K is a 133 kOhms ±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 values with reliable performance across industrial temperature ranges. The part maintains Active product status with ROHS3 compliance and is currently in stock inventory.

Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained within the allowed parameter tolerances for this resistor category.

Substiute Parts

RNF14FTC133K

Stackpole Electronics IncIn Stock: 854RNF14FTC133K Datasheet

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CMF55133K00FHEB

Vishay DaleIn Stock: 1951CMF55133K00FHEB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The CMF55133K00FHEB from Vishay Dale qualifies as a substitute based on the following critical parameters:

• Identical resistance value: 133 kOhms
• Identical tolerance: ±1%
• Identical composition: Metal Film
• Identical package type: Axial
• Identical temperature coefficient: ±50ppm/°C
• Identical RoHS compliance: ROHS3 Compliant
• Compatible operating temperature range: -55°C ~ 175°C (exceeds minimum requirement)

The substitute part maintains all electrical specifications required for direct functional replacement. Physical dimensions remain within acceptable axial resistor form factor tolerances.

Parameter Comparison

Engineering Selection Recommendations

Both the RNF14FTC133K and CMF55133K00FHEB maintain Active product status with full ROHS3 compliance and REACH unaffected certification. The substitute part provides equivalent electrical performance with enhanced thermal operating range (-55°C ~ 175°C versus -55°C ~ 155°C) and additional moisture resistance features. The higher power rating (0.5W versus 0.25W) of the substitute provides increased thermal margin in applications where the original 0.25W specification is met. Selection between these parts depends on packaging requirements (Tape & Reel versus Cut Tape) and inventory availability rather than electrical compatibility.

Frequently Asked Questions (FAQ)

Q: Can CMF55133K00FHEB directly replace RNF14FTC133K in existing designs?

A: Yes. Both parts share identical resistance (133 kOhms), tolerance (±1%), composition (metal film), temperature coefficient (±50ppm/°C), and axial package configuration. The substitute meets or exceeds all electrical specifications of the original part.

Q: What is the significance of the higher power rating on the substitute part?

A: The CMF55133K00FHEB is rated at 0.5W compared to the RNF14FTC133K at 0.25W. This provides additional thermal dissipation capability. In applications where the circuit operates within the 0.25W specification, the higher rating does not affect performance but offers increased safety margin.

Q: Are there packaging differences between these parts?

A: Yes. The RNF14FTC133K is supplied in Tape & Reel (TR) format, while the CMF55133K00FHEB is supplied in Cut Tape (CT) format. Both are axial through-hole components with compatible physical dimensions for PCB mounting.

Q: Do both parts meet the same compliance standards?

A: Yes. Both parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with identical HTSUS coding (8533.21.0090).

Q: What additional features does the substitute part provide?

A: The CMF55133K00FHEB includes moisture resistance in addition to the flame retardant coating and safety features present in the RNF14FTC133K. Both parts maintain the same operating temperature coefficient.