RNF12FTC43R2 Equivalent & Substitute Parts

Part Overview

The RNF12FTC43R2 is a 43.2 Ohm ±1% metal film axial through-hole resistor rated at 0.5W (1/2W) manufactured by Stackpole Electronics Inc. This component features flame retardant coating and safety-grade construction, designed for applications requiring precision resistance with thermal stability across industrial temperature ranges. The part is currently active in production with ROHS3 compliance. Substitute parts are identified when original inventory becomes unavailable or when design requirements permit alternative packaging or thermal specifications within the same electrical performance envelope.

Substiute Parts

RNF12FTC43R2

Stackpole Electronics IncIn Stock: 806RNF12FTC43R2 Datasheet

Current PartRFQ

CMF5543R200FHEB

Vishay DaleIn Stock: 1326CMF5543R200FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF12FTC43R2 is determined by strict equivalence across the following critical parameters:

• Resistance value: 43.2 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.5W / 1/2W (exact match required)
• Composition: Metal Film (exact match required)
• Temperature coefficient: ±50ppm/°C (exact match required)
• Package configuration: Axial through-hole (exact match required)
• Compliance: ROHS3 Compliant (minimum requirement)

The CMF5543R200FHEB from Vishay Dale meets all electrical and mechanical substitution criteria. Variations in physical dimensions, operating temperature upper limit, and packaging format (Cut Tape vs. Tape & Reel) do not affect functional equivalence when the above parameters are satisfied.

Parameter Comparison

Engineering Selection Recommendations

Both the RNF12FTC43R2 and CMF5543R200FHEB are active production components with ROHS3 compliance and REACH unaffected status. Selection between these parts should be based on:

• Packaging requirements: The RNF12FTC43R2 is supplied in Tape & Reel format suitable for automated assembly, while the CMF5543R200FHEB is supplied in Cut Tape format suitable for manual or semi-automated placement.
• Operating temperature ceiling: The CMF5543R200FHEB supports operation to 175°C compared to 155°C for the RNF12FTC43R2, providing additional thermal margin in high-temperature applications.
• Moisture resistance: The CMF5543R200FHEB includes moisture-resistant construction, beneficial in humid or corrosive environments.
• Physical dimensions: The CMF5543R200FHEB has smaller axial dimensions (0.090" Dia x 0.240" L vs. 0.108" Dia x 0.344" L), which may be advantageous in space-constrained layouts.

Frequently Asked Questions (FAQ)

Q: Can the CMF5543R200FHEB directly replace the RNF12FTC43R2 in existing designs?

A: Yes. Both components share identical electrical specifications (43.2 Ohms ±1%, 0.5W, ±50ppm/°C metal film construction). Functional substitution is valid. Physical dimension differences do not affect electrical performance, though PCB layout may require minor adjustment due to smaller body size of the CMF5543R200FHEB.

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

A: The RNF12FTC43R2 operates from -55°C to 155°C, while the CMF5543R200FHEB extends to 175°C. For applications operating below 155°C, both parts are equivalent. For applications requiring operation above 155°C, only the CMF5543R200FHEB is suitable.

Q: How do packaging formats affect component selection?

A: Tape & Reel (TR) packaging is optimized for high-volume automated assembly lines. Cut Tape (CT) packaging is suitable for lower-volume production, manual assembly, or mixed-component kitting. Electrical performance is identical; selection depends on assembly process requirements.

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

A: Both components are ROHS3 compliant, REACH unaffected, and carry EAR99 export classification. No compliance barriers exist for substitution.

Q: Does the moisture-resistant feature of the CMF5543R200FHEB provide additional benefits?

A: Moisture-resistant construction in the CMF5543R200FHEB provides enhanced reliability in high-humidity, marine, or outdoor environments. For standard indoor industrial applications, this feature provides additional margin but is not required for functional equivalence.