RNF12FTC294R Equivalent & Substitute Parts

Part Overview

The RNF12FTC294R is a 294 Ohms ±1% 0.5W through-hole axial resistor manufactured by Stackpole Electronics Inc. This metal film resistor features flame retardant coating and safety design, suitable for applications requiring precision resistance values in compact form factors. The part maintains Active product status with 1007 units in current inventory. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when packaging requirements differ.

Substiute Parts

RNF12FTC294R

Stackpole Electronics IncIn Stock: 1032RNF12FTC294R Datasheet

Current PartRFQ

CMF55294R00FHEB

Vishay DaleIn Stock: 1966CMF55294R00FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF12FTC294R is determined by the following critical parameters:

• Resistance value: 294 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.5W / 1/2W (exact match required)
• Composition: Metal Film (exact match required)
• Package type: Axial (exact match required)
• Temperature coefficient: ±50ppm/°C (exact match required)
• RoHS compliance: ROHS3 Compliant (minimum requirement)

The CMF55294R00FHEB from Vishay Dale meets all critical electrical parameters and compliance requirements. Physical dimensions differ slightly, and the operating temperature range extends to 175°C (versus 155°C for the primary part), representing an enhanced specification. Packaging format differs between Tape & Reel (TR) for the primary part and Cut Tape (CT) for the substitute.

Parameter Comparison

Engineering Selection Recommendations

Both the RNF12FTC294R and CMF55294R00FHEB are Active status components with ROHS3 compliance and REACH Unaffected designation. Selection between these parts should be based on:

• Packaging requirements: The primary part is supplied in Tape & Reel format, while the substitute is supplied in Cut Tape format. Verify your assembly process compatibility.
• Physical dimensions: The CMF55294R00FHEB is smaller in both diameter and length. Confirm PCB layout and mechanical clearance constraints.
• Operating temperature margin: The CMF55294R00FHEB supports operation to 175°C, providing additional thermal headroom compared to the 155°C maximum of the primary part.
• Moisture resistance: The CMF55294R00FHEB includes moisture resistant features, beneficial for high-humidity or outdoor applications.

Both parts satisfy identical electrical specifications and regulatory requirements for direct functional substitution.

Frequently Asked Questions (FAQ)

Q: Can the CMF55294R00FHEB replace the RNF12FTC294R in my circuit?

A: Yes. Both resistors share identical electrical specifications: 294 Ohms ±1% tolerance, 0.5W power rating, ±50ppm/°C temperature coefficient, and ROHS3 compliance. Functional substitution is valid provided PCB layout accommodates the smaller physical dimensions of the CMF55294R00FHEB.

Q: What are the physical dimension differences?

A: The RNF12FTC294R measures 0.108" diameter × 0.344" length (2.75mm × 8.75mm). The CMF55294R00FHEB measures 0.090" diameter × 0.240" length (2.29mm × 6.10mm). The substitute is smaller in both axes, requiring verification of PCB hole spacing and component clearance.

Q: Does packaging format affect electrical performance?

A: No. Tape & Reel (TR) and Cut Tape (CT) packaging formats are supply and handling methods only. Electrical performance and specifications remain identical. Packaging selection depends on assembly process requirements and volume handling.

Q: Is the extended operating temperature range of the CMF55294R00FHEB a concern?

A: No. The CMF55294R00FHEB supports -55°C to 175°C operation, compared to -55°C to 155°C for the RNF12FTC294R. This represents an enhanced specification that does not create compatibility issues in applications designed for the primary part's temperature range.

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

A: Both parts carry flame retardant coating and safety design features. The CMF55294R00FHEB adds moisture resistant properties. Both are ROHS3 compliant and REACH Unaffected. Verify specific application requirements against provided certifications and compliance documentation.