PRNF14FTD499K Equivalent & Substitute Parts

Part Overview

The PRNF14FTD499K is a 499 kOhms ±1% 0.25W through-hole axial resistor manufactured by Stackpole Electronics Inc. This metal film resistor features flame retardant coating and safety construction, with ROHS3 compliance and active product status. Equivalent and substitute parts are identified to support design flexibility, inventory optimization, and supply chain continuity while maintaining electrical and mechanical compatibility within specified parameter tolerances.

Substiute Parts

PRNF14FTD499K

Stackpole Electronics IncIn Stock: 1143PRNF14FTD499K Datasheet

Current PartRFQ

RNF14FTD499K

Stackpole Electronics IncIn Stock: 10883RNF14FTD499K Datasheet

DirectRFQ

RNMF14FTD499K

Stackpole Electronics IncIn Stock: 27755RNMF14FTD499K Datasheet

MFR RecommendedRFQ

CMF55499K00BEEB

Vishay DaleIn Stock: 8138CMF55499K00BEEB Datasheet

UpgradeRFQ

CMF55499K00FHEB

Vishay DaleIn Stock: 5335CMF55499K00FHEB Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts are classified based on the following criteria:

Direct Equivalent (Same Specifications): Parts maintaining identical resistance value (499 kOhms), tolerance (±1%), power rating (0.25W), composition (metal film), package type (axial), and operating temperature range (-55°C ~ 155°C). Packaging format variation (Tape & Reel vs. Cut Tape) does not affect electrical or mechanical compatibility.

Manufacturer Recommended (Same Electrical, Reduced Physical Size): Parts with identical electrical specifications but reduced physical dimensions. The RNMF series represents a miniaturized variant with the same resistance, tolerance, power rating, and temperature coefficient, enabling space-constrained applications.

Upgrade Options (Enhanced Performance): Parts with superior specifications including higher power rating (0.5W vs. 0.25W), tighter tolerance (±0.1% vs. ±1%), lower temperature coefficient (±25ppm/°C vs. ±100ppm/°C), and extended operating temperature range (-55°C ~ 175°C vs. -55°C ~ 155°C). These parts provide enhanced reliability and precision for demanding applications.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent Selection (RNF14FTD499K): Use when packaging format change from Tape & Reel to Cut Tape is acceptable. Electrical and mechanical specifications are identical to the main part. All compliance certifications (ROHS3, REACH Unaffected, EAR99) are maintained. Product status is active with higher inventory availability.

Manufacturer Recommended Selection (RNMF14FTD499K): Use in space-constrained PCB layouts where reduced physical dimensions (1.78mm diameter × 3.30mm length vs. 2.35mm × 6.35mm) provide design advantages. Electrical performance is identical. Highest inventory availability supports supply chain reliability. Suitable for high-density applications maintaining full electrical equivalence.

Upgrade Selection (CMF55499K00BEEB or CMF55499K00FHEB): Use when enhanced performance specifications are required. Both options provide increased power dissipation capability (0.5W vs. 0.25W) and extended operating temperature range (-55°C ~ 175°C). CMF55499K00BEEB offers superior tolerance (±0.1%) and lower temperature coefficient (±25ppm/°C) for precision applications. CMF55499K00FHEB maintains ±1% tolerance with improved temperature coefficient (±50ppm/°C). All upgrade options maintain ROHS3 compliance and active product status.

Frequently Asked Questions (FAQ)

Q: Can RNF14FTD499K replace PRNF14FTD499K directly? A: Yes. Both parts are identical in electrical specifications (499 kOhms ±1%, 0.25W, metal film, axial package) and operating parameters. The only difference is packaging format (Cut Tape vs. Tape & Reel), which does not affect component performance or PCB assembly compatibility.

Q: What is the advantage of RNMF14FTD499K over the main part? A: RNMF14FTD499K is a miniaturized variant with 56% smaller physical dimensions (1.78mm × 3.30mm vs. 2.35mm × 6.35mm) while maintaining identical electrical specifications. This enables higher component density on PCBs without performance compromise. Inventory availability is also significantly higher.

Q: When should I select the Vishay Dale CMF55 upgrade parts? A: Select CMF55499K00BEEB when precision and stability are critical (±0.1% tolerance, ±25ppm/°C temperature coefficient). Select CMF55499K00FHEB when tolerance matching the main part (±1%) is acceptable but improved temperature coefficient (±50ppm/°C) and higher power rating (0.5W) are beneficial. Both upgrade options extend operating temperature range to 175°C and provide enhanced thermal performance.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance, REACH Unaffected status, and EAR99 classification, matching the regulatory compliance profile of the main part.

Q: Can I use a 0.5W resistor in place of a 0.25W resistor? A: Yes, when upgrading to CMF55 series parts. Higher power rating provides additional thermal margin and reliability. Physical dimensions are comparable (2.29mm × 6.10mm vs. 2.35mm × 6.35mm), ensuring PCB layout compatibility. This substitution is suitable for applications requiring enhanced performance.

Q: What is the difference between CMF55499K00BEEB and CMF55499K00FHEB? A: Both are 0.5W Vishay Dale resistors with 499 kOhms resistance. CMF55499K00BEEB offers tighter tolerance (±0.1% vs. ±1%) and lower temperature coefficient (±25ppm/°C vs. ±50ppm/°C), making it suitable for precision applications. CMF55499K00FHEB maintains ±1% tolerance matching the main part while providing improved temperature stability and higher power rating.