PRNF14FTD18K7 Equivalent & Substitute Parts

Part Overview

The PRNF14FTD18K7 is a 18.7 kOhms ±1% metal film axial resistor rated at 0.25W (1/4W) manufactured by Stackpole Electronics Inc. This component is designed for through-hole applications requiring precision resistance with flame retardant coating and safety features. The part maintains Active product status with 1098 units in current inventory. Substitute parts are identified to address application requirements for higher power dissipation or enhanced environmental performance while maintaining core electrical specifications.

Substiute Parts

PRNF14FTD18K7

Stackpole Electronics IncIn Stock: 1187PRNF14FTD18K7 Datasheet

Current PartRFQ

CMF5518K700FHEB

Vishay DaleIn Stock: 7114CMF5518K700FHEB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the PRNF14FTD18K7 is based on the following electrical and mechanical parameters:

• Resistance Value: Must match 18.7 kOhms exactly
• Tolerance: Must maintain ±1% or tighter
• Composition: Metal film construction required
• Package: Axial through-hole configuration
• Compliance: ROHS3 and REACH requirements must be met

The identified substitute CMF5518K700FHEB from Vishay Dale satisfies these core criteria while offering enhanced power dissipation capability (0.5W vs 0.25W) and improved temperature coefficient performance (±50ppm/°C vs ±100ppm/°C). Both parts are Active status components with equivalent compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Selection between PRNF14FTD18K7 and CMF5518K700FHEB is determined by application power dissipation requirements and thermal environment specifications. Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility across industrial and commercial applications.

The PRNF14FTD18K7 is suitable for standard 1/4W power budget applications. The CMF5518K700FHEB provides increased thermal headroom with 0.5W rating and superior temperature stability (±50ppm/°C), making it appropriate for circuits requiring enhanced performance margins or operation in elevated temperature environments up to 175°C.

Physical dimensions differ slightly between parts (PRNF14FTD18K7: 0.093" Dia x 0.250" L vs CMF5518K700FHEB: 0.090" Dia x 0.240" L), requiring verification of PCB layout constraints in space-critical applications.

Frequently Asked Questions (FAQ)

Q: Can CMF5518K700FHEB directly replace PRNF14FTD18K7 in existing designs?

A: Yes, provided PCB layout accommodates the slightly smaller physical dimensions (0.090" Dia x 0.240" L vs 0.093" Dia x 0.250" L). Electrical performance is equivalent or superior across all specified parameters.

Q: What is the primary advantage of the CMF5518K700FHEB substitute?

A: The CMF5518K700FHEB offers doubled power dissipation capability (0.5W vs 0.25W) and improved temperature coefficient stability (±50ppm/°C vs ±100ppm/°C), with extended operating temperature range to 175°C.

Q: Are both parts suitable for high-reliability applications?

A: Both components are Active status products with ROHS3 compliance and REACH unaffected status. Selection depends on specific application thermal and power requirements.

Q: What packaging formats are available?

A: PRNF14FTD18K7 is supplied in Tape & Reel (TR) format. CMF5518K700FHEB is supplied in Cut Tape (CT) format. Both are axial through-hole components.

Q: Do these resistors require moisture sensitivity precautions?

A: No. Both components have Moisture Sensitivity Level (MSL) listed as Not Applicable, eliminating special storage or handling requirements.