RNF14FTC6K49 Equivalent & Substitute Parts

Part Overview

The RNF14FTC6K49 is a 6.49 kOhms ±1% metal film through-hole resistor rated at 0.25W (1/4W) manufactured by Stackpole Electronics Inc. This axial component features flame retardant coating and safety construction, designed for applications requiring precision resistive elements in standard through-hole configurations. The part maintains Active product status with 896 units in current inventory. Substitute parts are identified to provide alternative sourcing options when the primary part becomes unavailable or when procurement requirements necessitate alternative manufacturers or packaging formats.

Substiute Parts

RNF14FTC6K49

Stackpole Electronics IncIn Stock: 982RNF14FTC6K49 Datasheet

Current PartRFQ

CMF506K4900FHEB

Vishay DaleIn Stock: 1116CMF506K4900FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF14FTC6K49 is determined by strict equivalence across the following parameters:

Critical Matching Parameters:

• Resistance value of 6.49 kOhms
• Tolerance of ±1% or better
• Power rating of 0.25W minimum
• Metal film composition
• Axial through-hole package configuration
• Two terminations

Compatible Variation Parameters:

• Operating temperature range may extend beyond the original specification
• Physical dimensions may vary within axial form factor constraints
• Packaging format (Tape & Reel vs. Cut Tape) does not affect electrical equivalence
• Additional features (such as moisture resistance) do not disqualify substitution

Compliance Requirements:

• RoHS3 compliance maintained
• ECCN and HTSUS classifications aligned

The substitute part CMF506K4900FHEB meets all critical matching parameters and maintains regulatory compliance, qualifying it as a direct electrical equivalent despite minor dimensional and packaging differences.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection (RNF14FTC6K49): The RNF14FTC6K49 remains the preferred selection when available. Active product status, established supply chain presence (896 units in stock), and proven field performance support continued use. ROHS3 compliance and EAR99 classification confirm regulatory alignment for standard applications.

Substitute Part Selection (CMF506K4900FHEB): The CMF506K4900FHEB qualifies as a direct electrical substitute when the primary part is unavailable. Electrical parameters are identical across resistance, tolerance, power rating, and temperature coefficient. The extended operating temperature range (-55°C to 175°C versus -55°C to 155°C) provides additional thermal margin for applications operating near the upper temperature boundary. The addition of moisture-resistant properties enhances performance in humid environments without compromising electrical characteristics.

Physical Considerations: The substitute part exhibits smaller physical dimensions (0.065" diameter × 0.150" length versus 0.093" diameter × 0.250" length). PCB layout and component spacing must accommodate this dimensional difference. The reduced size may provide benefits in space-constrained designs but requires verification of mechanical fit within existing board layouts.

Packaging Considerations: The primary part is supplied in Tape & Reel format while the substitute is supplied in Cut Tape format. This difference affects procurement and assembly processes but does not impact electrical performance or final circuit function.

Compliance Status: Both parts maintain ROHS3 compliance and EAR99 classification. The substitute part is REACH Affected while the primary part is REACH Unaffected; however, both satisfy regulatory requirements for their respective jurisdictions.

Frequently Asked Questions (FAQ)

Q: Can CMF506K4900FHEB be used as a direct replacement for RNF14FTC6K49 in existing circuit designs?

A: Yes, from an electrical standpoint. Both components provide identical resistance (6.49 kOhms), tolerance (±1%), power rating (0.25W), and temperature coefficient (±50ppm/°C). Physical dimensions differ, requiring verification that the smaller substitute part fits within existing PCB layouts and component spacing constraints.

Q: What is the significance of the different operating temperature ranges?

A: The RNF14FTC6K49 operates from -55°C to 155°C, while the CMF506K4900FHEB operates from -55°C to 175°C. The substitute part provides a 20°C higher upper temperature limit. For applications operating below 155°C, both parts perform identically. For applications requiring operation between 155°C and 175°C, only the substitute part is suitable.

Q: Does the moisture-resistant feature of the substitute part affect compatibility?

A: No. The moisture-resistant coating on the CMF506K4900FHEB is an additional feature that does not alter electrical performance or create incompatibility. It provides enhanced protection in humid environments without changing the component's electrical characteristics or circuit behavior.

Q: Are there any concerns with the different packaging formats?

A: Packaging format (Tape & Reel versus Cut Tape) affects procurement, storage, and assembly processes but does not impact electrical performance or circuit function. Component selection should account for assembly equipment compatibility and inventory management procedures.

Q: How do the physical dimension differences affect PCB design?

A: The substitute part is significantly smaller (0.065" diameter × 0.150" length versus 0.093" diameter × 0.250" length). Existing PCB layouts designed for the larger primary part will accommodate the smaller substitute without issue. However, designs with tight component spacing or specific mechanical constraints must be verified to ensure the substitute part fits within allocated space.

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

A: Both parts feature flame retardant coating and safety construction, supporting use in applications requiring enhanced reliability. Both maintain ROHS3 compliance and EAR99 classification. Selection between them should be based on specific application requirements including operating temperature range, physical space constraints, and supply chain considerations.

Q: What is the inventory status for each part?

A: The RNF14FTC6K49 has 896 units in current stock. The CMF506K4900FHEB has 1101 units in current stock. Inventory levels should be verified at time of procurement as stock quantities change continuously.