RNF18FAD200K Equivalent & Substitute Parts

Part Overview

The RNF18FAD200K is a 200 kOhms ±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. Equivalent and substitute parts are identified when design requirements permit tolerance for variations in power rating, temperature coefficient, or packaging specifications while maintaining core electrical functionality.

Substiute Parts

RNF18FAD200K

Stackpole Electronics IncIn Stock: 5757RNF18FAD200K Datasheet

Current PartRFQ

RNF18FTD200K

Stackpole Electronics IncIn Stock: 16753RNF18FTD200K Datasheet

DirectRFQ

RNMF14FTC200K

Stackpole Electronics IncIn Stock: 13168RNMF14FTC200K Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF18FAD200K is determined by the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 200 kOhms
• Tolerance: ±1%
• Composition: Metal Film
• Package type: Axial
• Operating temperature range: -55°C ~ 155°C
• Compliance certifications: ROHS3 Compliant, REACH Unaffected

Allowable Variation Parameters:

• Power rating: May increase from 0.125W to higher ratings (0.25W or greater) without functional degradation
• Temperature coefficient: May decrease (improve) from ±100ppm/°C to lower values such as ±50ppm/°C
• Physical dimensions: Minor variations acceptable within axial package constraints

Substitutes are classified into two categories: direct equivalents (identical specifications) and upgrades (enhanced performance characteristics).

Parameter Comparison

Engineering Selection Recommendations

RNF18FTD200K (Direct Equivalent): This part is a direct functional equivalent to the RNF18FAD200K with identical electrical specifications and physical dimensions. Selection is appropriate for applications requiring identical performance characteristics and form factor. Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility across manufacturing environments.

RNMF14FTC200K (Upgrade Substitute): This part provides enhanced performance through increased power rating (0.25W versus 0.125W) and improved temperature coefficient (±50ppm/°C versus ±100ppm/°C). Physical dimensions are nearly identical with negligible variation (0.070" versus 0.071" diameter). Selection is appropriate for applications where thermal margin or temperature stability improvements are beneficial. ROHS3 compliance and REACH unaffected status are maintained. The upgrade classification reflects superior performance characteristics while preserving core electrical functionality.

Frequently Asked Questions (FAQ)

Q: Can RNF18FTD200K be used as a direct replacement for RNF18FAD200K? A: Yes. Both parts share identical resistance (200 kOhms), tolerance (±1%), power rating (0.125W), temperature coefficient (±100ppm/°C), and physical dimensions. They are functionally interchangeable.

Q: What are the advantages of using RNMF14FTC200K instead of RNF18FAD200K? A: The RNMF14FTC200K offers two performance enhancements: doubled power rating (0.25W versus 0.125W) providing greater thermal headroom, and improved temperature coefficient (±50ppm/°C versus ±100ppm/°C) for enhanced stability across temperature variations. Physical dimensions remain compatible with standard axial package PCB layouts.

Q: Are there any dimensional compatibility concerns when substituting RNMF14FTC200K? A: Dimensional differences are minimal. The RNMF14FTC200K diameter is 0.070" compared to 0.071" for the RNF18FAD200K, a difference of 0.001". Both maintain 0.130" length. These variations are within standard PCB hole tolerance specifications for axial components.

Q: Do all substitute parts maintain the same regulatory compliance? A: Yes. RNF18FTD200K and RNMF14FTC200K are both ROHS3 compliant and REACH unaffected, matching the compliance status of RNF18FAD200K.

Q: Which substitute should be selected for high-temperature applications? A: RNMF14FTC200K is preferred for high-temperature applications due to its superior temperature coefficient (±50ppm/°C) and higher power rating, providing better stability and thermal performance across the full -55°C ~ 155°C operating range.

Q: Can substitutes be used interchangeably in existing designs? A: RNF18FTD200K is a direct interchange. RNMF14FTC200K requires verification that PCB layout accommodates the minimal dimensional variation and that the enhanced power rating does not introduce unintended thermal effects in the circuit design.