RNF14FTC34K8 Equivalent & Substitute Parts

Part Overview

The RNF14FTC34K8 is a 34.8 kOhms ±1% metal film axial through-hole resistor rated at 0.25W (1/4W) manufactured by Stackpole Electronics Inc. This component features flame retardant coating and safety-grade construction, designed for applications requiring precision resistance values with tight tolerance specifications. The part is currently in active production status with 800 units available in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design optimization across compatible applications.

Substiute Parts

RNF14FTC34K8

Stackpole Electronics IncIn Stock: 883RNF14FTC34K8 Datasheet

Current PartRFQ

CMF5534K800FHEB

Vishay DaleIn Stock: 2392CMF5534K800FHEB Datasheet

UpgradeRFQ

CMF5034K800FHEB

Vishay DaleIn Stock: 1851CMF5034K800FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNF14FTC34K8 are qualified based on the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Identical resistance value: 34.8 kOhms
• Identical tolerance: ±1%
• Identical composition: Metal Film
• Identical package type: Axial
• Identical temperature coefficient: ±50ppm/°C
• Identical termination count: 2
• Compliance equivalence: ROHS3 Compliant

Allowable Variations:

• Power rating: May be equal or higher (0.25W or greater)
• Operating temperature range: May be equal or extended
• Physical dimensions: May vary within axial package constraints
• Packaging format: Cut Tape (CT) or Tape & Reel (TR) acceptable
• Manufacturer: Different qualified manufacturers permitted

Two substitute parts meet these criteria: CMF5034K800FHEB (manufacturer-recommended equivalent with identical power rating) and CMF5534K800FHEB (upgrade option with higher power rating).

Parameter Comparison

Engineering Selection Recommendations

CMF5034K800FHEB (Manufacturer-Recommended Equivalent)

This part is the direct equivalent substitute for the RNF14FTC34K8. It maintains identical electrical specifications (34.8 kOhms ±1%, 0.25W, ±50ppm/°C) and meets all compliance requirements (ROHS3 Compliant, REACH Unaffected). The CMF5034K800FHEB is manufactured by Vishay Dale and includes enhanced moisture resistance features. Physical dimensions are smaller (0.065" Dia x 0.150" L versus 0.093" Dia x 0.250" L), which may provide layout advantages in space-constrained applications. Operating temperature range extends to 175°C compared to 155°C. This part is suitable for direct substitution in existing designs without circuit modification.

CMF5534K800FHEB (Upgrade Option)

This part provides an upgrade path with doubled power rating (0.5W versus 0.25W) while maintaining all other electrical parameters. The CMF5534K800FHEB is appropriate for applications where thermal margin or power dissipation headroom is beneficial. Physical dimensions (0.090" Dia x 0.240" L) are comparable to the original part. Extended operating temperature range to 175°C and moisture resistance features are included. This substitution requires verification that the larger physical dimensions are compatible with board layout and mechanical constraints.

Both substitute parts are active production items with higher inventory availability than the original part.

Frequently Asked Questions (FAQ)

Q: Can CMF5034K800FHEB be used as a direct drop-in replacement for RNF14FTC34K8?

A: Yes. The CMF5034K800FHEB maintains identical electrical specifications (34.8 kOhms ±1%, 0.25W, ±50ppm/°C) and compliance certifications. Physical dimensions are smaller, which may require PCB layout verification but does not affect electrical performance.

Q: What is the difference between CMF5034K800FHEB and CMF5534K800FHEB?

A: The primary difference is power rating. CMF5034K800FHEB is rated at 0.25W (1/4W), matching the original part. CMF5534K800FHEB is rated at 0.5W (1/2W), providing doubled thermal capacity. Both maintain identical resistance, tolerance, and temperature coefficient specifications.

Q: Can CMF5534K800FHEB be used in place of RNF14FTC34K8?

A: Yes, with layout verification. The higher power rating provides additional thermal margin and does not degrade performance in applications designed for 0.25W. Physical dimensions (0.090" Dia x 0.240" L) are slightly different from the original (0.093" Dia x 0.250" L) and must be confirmed compatible with board layout and mechanical constraints.

Q: Are there any compliance or certification differences between these parts?

A: No. All three parts are ROHS3 Compliant and REACH Unaffected. The substitute parts (CMF series) include additional moisture resistance features not specified for the original part.

Q: What packaging formats are available?

A: RNF14FTC34K8 is supplied in Tape & Reel (TR) format. Both CMF substitute parts are supplied in Cut Tape (CT) format. Packaging format does not affect electrical or mechanical compatibility.

Q: Do the substitute parts have extended operating temperature ranges?

A: Yes. Both CMF substitute parts operate from -55°C to 175°C, compared to -55°C to 155°C for the original RNF14FTC34K8. This extended range provides additional thermal margin in high-temperature applications.