RNF18FTC100K Equivalent & Substitute Parts

Part Overview

The RNF18FTC100K is a 100 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 applications requiring precision resistive elements with flame retardant coating and safety features. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility allow direct replacement in circuit designs.

Substiute Parts

RNF18FTC100K

Stackpole Electronics IncIn Stock: 840RNF18FTC100K Datasheet

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RNMF14FTC100K

Stackpole Electronics IncIn Stock: 55071RNMF14FTC100K Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the RNF18FTC100K is permissible with the RNMF14FTC100K based on the following criteria:

Matching Parameters (Required for Substitution):

• Resistance value: 100 kOhms (identical)
• Tolerance: ±1% (identical)
• Composition: Metal Film (identical)
• Temperature Coefficient: ±50ppm/°C (identical)
• Operating Temperature Range: -55°C to 155°C (identical)
• Package Type: Axial (identical)
• Features: Flame Retardant Coating, Safety (identical)
• Compliance: ROHS3 Compliant, REACH Unaffected (identical)

Differing Parameter:

• Power Rating: The substitute part RNMF14FTC100K is rated at 0.25W (1/4W), which exceeds the original 0.125W (1/8W) specification. This represents an upgrade in power dissipation capability.

The RNMF14FTC100K can substitute the RNF18FTC100K in applications where the circuit design permits use of a higher power-rated component without adverse effects on thermal management or circuit performance.

Parameter Comparison

Engineering Selection Recommendations

Both the RNF18FTC100K and RNMF14FTC100K maintain active production status with full ROHS3 compliance and REACH unaffected certification. The RNMF14FTC100K provides identical electrical performance with enhanced power dissipation capability. Selection between these components depends on circuit power budget requirements and available board space, as the substitute part maintains equivalent axial package dimensions while offering increased thermal headroom.

Frequently Asked Questions (FAQ)

Q: Can RNMF14FTC100K directly replace RNF18FTC100K in existing designs?

A: Yes, provided the circuit design accommodates the higher 0.25W power rating. The electrical specifications, tolerance, temperature coefficient, and operating range are identical. Physical dimensions are equivalent in axial package configuration.

Q: What is the primary difference between these two parts?

A: The power rating differs: RNF18FTC100K is rated at 0.125W (1/8W), while RNMF14FTC100K is rated at 0.25W (1/4W). All other electrical and mechanical parameters are identical.

Q: Are both parts compliant with current regulatory standards?

A: Yes. Both components are ROHS3 compliant and REACH unaffected, meeting current environmental and safety requirements.

Q: Does the higher power rating of RNMF14FTC100K affect circuit performance?

A: No. A higher power rating does not degrade performance in applications designed for lower power dissipation. The substitute part will operate within normal parameters with additional thermal margin.

Q: Are the physical dimensions compatible for PCB layout?

A: Yes. Both parts use identical axial package configuration with equivalent dimensions (0.070"-0.071" diameter, 0.130" length), allowing direct substitution on existing PCB layouts.