RNF12FTC100R Equivalent & Substitute Parts

Part Overview

The RNF12FTC100R is a 100 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 construction, designed for applications requiring precision resistance in compact form factors. The part is currently active in production and available in Tape & Reel packaging with 866 units in stock. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical compatibility, and compliance certifications.

Key Parameters

Parameter	Value
Resistance	100 Ohms
Tolerance	±1%
Power Rating	0.5W (1/2W)
Composition	Metal Film
Temperature Coefficient	±50ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Package Type	Axial
Features	Flame Retardant Coating, Safety
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the RNF12FTC100R are qualified based on the following criteria:

Resistance value: 100 Ohms
Tolerance: ±1%
Power rating: 0.5W (1/2W)
Composition: Metal Film
Temperature coefficient: ±50ppm/°C
Package configuration: Axial through-hole
Compliance: ROHS3 Compliant, REACH Unaffected

The substitute parts identified are manufactured by Vishay Dale under the CMF series. All substitutes maintain identical electrical specifications and axial package geometry, ensuring direct functional equivalence. Variations in physical dimensions and packaging formats (Cut Tape, Tape & Reel, Bulk) do not affect electrical performance or circuit compatibility.

Parameter Comparison

Parameter	RNF12FTC100R (Stackpole)	CMF55100R00FHEA (Vishay Dale)	CMF55100R00FHEB (Vishay Dale)	CMF55100R00FHEK (Vishay Dale)
Manufacturer	Stackpole Electronics Inc	Vishay Dale	Vishay Dale	Vishay Dale
Resistance	100 Ohms	100 Ohms	100 Ohms	100 Ohms
Tolerance	±1%	±1%	±1%	±1%
Power Rating	0.5W	0.5W	0.5W	0.5W
Composition	Metal Film	Metal Film	Metal Film	Metal Film
Temperature Coefficient	±50ppm/°C	±50ppm/°C	±50ppm/°C	±50ppm/°C
Operating Temperature	-55°C ~ 155°C	-55°C ~ 175°C	-55°C ~ 175°C	-55°C ~ 175°C
Package Type	Axial	Axial	Axial	Axial
Physical Dimensions	0.108" Dia x 0.344" L (2.75mm x 8.75mm)	0.090" Dia x 0.240" L (2.29mm x 6.10mm)	0.090" Dia x 0.240" L (2.29mm x 6.10mm)	0.090" Dia x 0.240" L (2.29mm x 6.10mm)
Features	Flame Retardant Coating, Safety	Flame Retardant Coating, Moisture Resistant, Safety	Flame Retardant Coating, Moisture Resistant, Safety	Flame Retardant Coating, Moisture Resistant, Safety
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Discontinued at DiGi Electronics
Packaging Format	Tape & Reel (TR)	Cut Tape (CT)	Tape & Reel (TR)	Bulk
Inventory Availability	866 Pcs	3104 Pcs	6805 Pcs	1153 Pcs

Engineering Selection Recommendations

All three CMF55 series substitutes from Vishay Dale meet the electrical and mechanical requirements for direct replacement of the RNF12FTC100R. Selection among the substitute options should be based on the following factors:

CMF55100R00FHEA and CMF55100R00FHEB are both actively produced and widely available. CMF55100R00FHEA is supplied in Cut Tape format with 3104 units in stock, while CMF55100R00FHEB is supplied in Tape & Reel format with 6805 units in stock. Both maintain identical electrical specifications and feature enhanced moisture resistance compared to the original part.

CMF55100R00FHEK is supplied in Bulk packaging and is discontinued at DiGi Electronics, limiting its suitability for new procurement despite current inventory availability.

All substitute parts exceed the operating temperature range of the original part, extending to 175°C versus 155°C, providing additional thermal margin. Physical dimensions of the CMF55 series are smaller than the RNF12FTC100R, which may require PCB layout verification in space-constrained applications but does not affect electrical compatibility.

Frequently Asked Questions (FAQ)

Q: Can CMF55100R00FHEA, CMF55100R00FHEB, and CMF55100R00FHEK be used interchangeably with RNF12FTC100R?

A: Yes. All three CMF55 variants are electrically equivalent to the RNF12FTC100R, sharing identical resistance (100 Ohms), tolerance (±1%), power rating (0.5W), temperature coefficient (±50ppm/°C), and metal film composition. The differences are packaging format and physical dimensions, not electrical performance.

Q: What is the difference between the three CMF55 substitute options?

A: The three parts differ only in packaging format and availability. CMF55100R00FHEA is Cut Tape, CMF55100R00FHEB is Tape & Reel, and CMF55100R00FHEK is Bulk. All are electrically identical. CMF55100R00FHEK is discontinued at DiGi Electronics, making it less suitable for ongoing procurement.

Q: Are the physical dimensions of the CMF55 series compatible with RNF12FTC100R footprints?

A: The CMF55 series has smaller physical dimensions (0.090" Dia x 0.240" L) compared to the RNF12FTC100R (0.108" Dia x 0.344" L). While electrically compatible, PCB layout and mechanical clearance must be verified for applications with tight spacing constraints.

Q: Do the substitute parts have better performance characteristics than the original?

A: The CMF55 substitutes maintain identical electrical specifications but offer an extended operating temperature range (-55°C to 175°C versus -55°C to 155°C) and additional moisture resistance features. These enhancements do not change functional equivalence but provide additional design margin.

Q: Are all parts RoHS3 compliant?

A: Yes. The RNF12FTC100R and all three CMF55 substitutes are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.

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