RNF12FTC1K50 Equivalent & Substitute Parts

Part Overview

The RNF12FTC1K50 is a 1.5 kOhms ±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 construction, designed for applications requiring precision resistance with thermal stability across industrial temperature ranges. The part is currently in active production status with 1052 units in stock. Substitute parts are identified to provide alternative sourcing options while maintaining electrical and mechanical compatibility for direct circuit board replacement.

Substiute Parts

RNF12FTC1K50

Stackpole Electronics IncIn Stock: 1144RNF12FTC1K50 Datasheet

Current PartRFQ

CMF551K5000FHEB

Vishay DaleIn Stock: 13891CMF551K5000FHEB Datasheet

MFR RecommendedRFQ

CMF551K5000FHEK

Vishay DaleIn Stock: 1355CMF551K5000FHEK Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNF12FTC1K50 are qualified based on the following electrical and mechanical parameters:

• Resistance value: 1.5 kOhms (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)
• RoHS compliance: ROHS3 Compliant (exact match required)

The identified substitute parts CMF551K5000FHEB and CMF551K5000FHEK from Vishay Dale meet all critical electrical specifications. Both parts maintain the same resistance, tolerance, power rating, composition, and temperature coefficient. Physical dimensions differ slightly (0.090" Dia x 0.240" L versus 0.108" Dia x 0.344" L), which is acceptable for axial component substitution in standard through-hole applications. Operating temperature range extends to 175°C for substitute parts, providing enhanced thermal capability. Both substitute parts include moisture-resistant features in addition to flame retardant coating.

Parameter Comparison

Engineering Selection Recommendations

Both CMF551K5000FHEB and CMF551K5000FHEK are qualified substitutes for the RNF12FTC1K50. Selection between these options depends on packaging requirements:

CMF551K5000FHEB is supplied in Cut Tape (CT) format with 13,811 units in stock, suitable for automated assembly processes requiring tape-and-reel or cut-tape feeding systems.

CMF551K5000FHEK is supplied in Bulk format with 1,253 units in stock, appropriate for manual assembly or applications where packaging format is not a constraint.

All three parts maintain ROHS3 compliance and REACH unaffected status. The substitute parts from Vishay Dale provide extended operating temperature capability to 175°C compared to the original 155°C maximum, offering improved thermal margin for high-temperature applications. Smaller physical dimensions of the substitute parts may provide layout advantages in space-constrained designs while maintaining full electrical equivalence.

Frequently Asked Questions (FAQ)

Q: Can CMF551K5000FHEB or CMF551K5000FHEK be used as direct replacements for RNF12FTC1K50?

A: Yes. Both parts meet all critical electrical specifications: 1.5 kOhms resistance, ±1% tolerance, 0.5W power rating, metal film composition, and ±50ppm/°C temperature coefficient. Axial package configuration enables direct through-hole board replacement.

Q: What is the difference between CMF551K5000FHEB and CMF551K5000FHEK?

A: The primary difference is packaging format. CMF551K5000FHEB is supplied in Cut Tape (CT) format for automated assembly, while CMF551K5000FHEK is supplied in Bulk format. Electrical specifications and physical dimensions are identical.

Q: Are there physical dimension differences that affect board layout?

A: Yes. The substitute parts measure 0.090" Dia x 0.240" L compared to the original 0.108" Dia x 0.344" L. The smaller dimensions may provide layout benefits but do not affect electrical performance or through-hole compatibility.

Q: Do the substitute parts offer any additional features?

A: Both substitute parts include moisture-resistant properties in addition to flame retardant coating, providing enhanced environmental protection compared to the original part.

Q: What is the operating temperature difference?

A: Substitute parts operate to 175°C maximum compared to 155°C for the original part. This extended range provides additional thermal margin for high-temperature applications.

Q: Are all parts RoHS compliant?

A: Yes. The original RNF12FTC1K50 and both substitute parts are ROHS3 compliant and REACH unaffected.