RNF18FTD820R Equivalent & Substitute Parts

Part Overview

The RNF18FTD820R is an 820 Ohms ±1% metal film through-hole resistor rated at 0.125W (1/8W) in axial package configuration, manufactured by Stackpole Electronics Inc. This component is actively produced and widely used in electronic circuits requiring precision resistive elements with flame retardant coating and safety features. Substitute parts may be required due to inventory constraints, packaging format preferences, or application-specific power rating requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

RNF18FTD820R

Stackpole Electronics IncIn Stock: 882RNF18FTD820R Datasheet

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RNMF14FTC820R

Stackpole Electronics IncIn Stock: 13488RNMF14FTC820R Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The RNMF14FTC820R qualifies as a direct substitute for the RNF18FTD820R based on the following allowed parameters:

• Identical resistance value: 820 Ohms
• Identical tolerance: ±1%
• Identical composition: Metal Film
• Identical package type: Axial
• Identical operating temperature range: -55°C ~ 155°C
• Identical RoHS compliance: ROHS3 Compliant
• Identical features: Flame Retardant Coating, Safety

The primary difference is the power rating upgrade from 0.125W to 0.25W (1/4W), which represents a higher power dissipation capability. This upgrade maintains backward compatibility in applications where the original 1/8W rating is sufficient, as the substitute can handle equal or greater power levels without exceeding design limits.

Parameter Comparison

Engineering Selection Recommendations

Both the RNF18FTD820R and RNMF14FTC820R are active products manufactured by Stackpole Electronics Inc and maintain full ROHS3 compliance. The RNMF14FTC820R offers improved temperature coefficient stability (±50ppm/°C versus ±100ppm/°C) and higher power dissipation capability (0.25W versus 0.125W) while maintaining identical electrical specifications for resistance and tolerance. Physical dimensions are nearly equivalent, with negligible differences in diameter (0.071" versus 0.070"). Selection between these parts should be based on application power requirements and thermal stability needs.

Frequently Asked Questions (FAQ)

Q: Can RNMF14FTC820R replace RNF18FTD820R in existing designs?

A: Yes. The RNMF14FTC820R is electrically and mechanically compatible as a direct substitute. The higher power rating (0.25W versus 0.125W) ensures the substitute can handle applications designed for the original part without exceeding thermal or electrical limits.

Q: What is the significance of the power rating difference?

A: The power rating indicates maximum continuous power dissipation. The RNMF14FTC820R's 0.25W rating provides additional thermal margin compared to the RNF18FTD820R's 0.125W rating. In applications where actual power dissipation is below 0.125W, both parts perform identically.

Q: Are there packaging format differences?

A: The RNF18FTD820R is supplied in Tape & Reel (TR) format, while the RNMF14FTC820R is supplied in Cut Tape (CT) format. Both maintain identical axial package configuration and are suitable for through-hole assembly.

Q: How do temperature coefficients affect substitution?

A: The RNMF14FTC820R exhibits superior temperature stability with ±50ppm/°C compared to the RNF18FTD820R's ±100ppm/°C. This means the substitute maintains tighter resistance tolerance across the operating temperature range, making it suitable for precision applications.

Q: Are both parts RoHS compliant?

A: Yes. Both RNF18FTD820R and RNMF14FTC820R are ROHS3 compliant and suitable for applications requiring regulatory compliance.