RNF14BAC249R Equivalent & Substitute Parts

Part Overview

The RNF14BAC249R is a 249 Ohm metal film through-hole resistor manufactured by Stackpole Electronics Inc. This 1/4W axial component features ±0.1% tolerance, flame retardant coating, and operates across -55°C to 155°C. The part is Active status and ROHS3 compliant. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when design requirements necessitate different performance characteristics within compatible electrical and mechanical parameters.

Substiute Parts

RNF14BAC249R

Stackpole Electronics IncIn Stock: 740RNF14BAC249R Datasheet

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CPF1249R00BEEE6

Vishay DaleIn Stock: 2437CPF1249R00BEEE6 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF14BAC249R is determined by the following critical parameters:

• Resistance value: 249 Ohms (exact match required)
• Tolerance: ±0.1% (exact match required)
• Composition: Metal Film (exact match required)
• Package: Axial through-hole (exact match required)
• Power rating: Equal to or greater than 0.25W
• Operating temperature range: Must encompass or exceed -55°C ~ 155°C
• RoHS compliance: ROHS3 Compliant (maintained)

The CPF1249R00BEEE6 qualifies as a substitute because it maintains identical resistance, tolerance, and composition while providing enhanced power rating (1W vs. 0.25W), extended operating temperature range (-65°C ~ 230°C), and improved temperature coefficient (±25ppm/°C vs. ±50ppm/°C). The axial package configuration remains consistent.

Parameter Comparison

Engineering Selection Recommendations

Both the RNF14BAC249R and CPF1249R00BEEE6 maintain Active product status and ROHS3 compliance. The CPF1249R00BEEE6 provides higher power dissipation capability (1W vs. 0.25W), superior temperature stability (±25ppm/°C vs. ±50ppm/°C), and extended operating temperature range (-65°C ~ 230°C vs. -55°C ~ 155°C). Selection between these parts depends on circuit power requirements and thermal operating conditions. Both parts are suitable for applications requiring 249 Ohm metal film resistors with ±0.1% tolerance in axial through-hole configurations.

Frequently Asked Questions (FAQ)

Q: Can the CPF1249R00BEEE6 directly replace the RNF14BAC249R in existing designs?

A: Yes, within the constraints of physical board layout. Both parts are axial through-hole components with identical resistance and tolerance values. The CPF1249R00BEEE6 has slightly different dimensions (0.090" Dia x 0.240" L vs. 0.093" Dia x 0.250" L), which may require verification for tight PCB spacing. The higher power rating of the CPF1249R00BEEE6 is backward compatible with applications designed for 0.25W.

Q: What is the significance of the ±0.1% tolerance specification?

A: The ±0.1% tolerance indicates precision-grade resistors suitable for applications requiring tight resistance accuracy. Both the main part and substitute maintain this specification, ensuring equivalent performance in precision circuits.

Q: Are there differences in reliability between these parts?

A: Both parts are Active status components from established manufacturers with ROHS3 compliance. The CPF1249R00BEEE6 features moisture-resistant properties in addition to flame-proof characteristics, providing enhanced environmental protection compared to the flame retardant coating of the RNF14BAC249R.

Q: How do the temperature coefficients affect circuit performance?

A: The CPF1249R00BEEE6 exhibits a lower temperature coefficient (±25ppm/°C vs. ±50ppm/°C), resulting in better resistance stability across temperature variations. This makes the substitute part more suitable for applications with stringent temperature stability requirements.

Q: Can the 1W CPF1249R00BEEE6 be used in a circuit designed for 0.25W?

A: Yes. The higher power rating of the CPF1249R00BEEE6 is a non-limiting characteristic for circuits designed for lower power dissipation. The part will operate safely with reduced power stress.