RNF12FTC127R Equivalent & Substitute Parts

Part Overview

The RNF12FTC127R is a 127 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 is currently active in production with 741 pieces in stock. Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility permits alternative sourcing from qualified manufacturers meeting identical electrical and mechanical specifications.

Substiute Parts

RNF12FTC127R

Stackpole Electronics IncIn Stock: 834RNF12FTC127R Datasheet

Current PartRFQ

CMF55127R00FHEB

Vishay DaleIn Stock: 1862CMF55127R00FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RNF12FTC127R is permissible with parts meeting all of the following criteria:

• Resistance value: 127 Ohms
• Tolerance: ±1%
• Power rating: 0.5W (1/2W)
• Composition: Metal Film
• Temperature coefficient: ±50ppm/°C
• Package type: Axial through-hole
• Flame retardant coating and safety features
• RoHS3 compliance
• Operating temperature range minimum: -55°C (may exceed 155°C upper limit)

The CMF55127R00FHEB from Vishay Dale satisfies all substitution criteria and is classified as a manufacturer-recommended equivalent.

Parameter Comparison

Engineering Selection Recommendations

Both the RNF12FTC127R and CMF55127R00FHEB are active production parts with ROHS3 compliance and REACH unaffected status. The CMF55127R00FHEB provides an extended operating temperature range to 175°C and includes moisture-resistant properties. Physical dimensions differ, with the CMF55127R00FHEB being more compact. Both parts meet the core electrical specifications of 127 Ohms ±1% at 0.5W with ±50ppm/°C temperature coefficient. Selection between these parts depends on available inventory, packaging requirements (Tape & Reel versus Cut Tape), and physical space constraints in the application.

Frequently Asked Questions (FAQ)

Q: Can CMF55127R00FHEB replace RNF12FTC127R in all applications?

A: Yes, provided the smaller physical dimensions of the CMF55127R00FHEB (0.090" Dia x 0.240" L versus 0.108" Dia x 0.344" L) are compatible with the PCB layout and mechanical assembly. Both parts are electrically identical at the specified operating conditions.

Q: What is the significance of the extended temperature range in the CMF55127R00FHEB?

A: The CMF55127R00FHEB operates to 175°C maximum, compared to 155°C for the RNF12FTC127R. This provides additional thermal margin in high-temperature applications, though both parts maintain ±50ppm/°C temperature coefficient across their respective ranges.

Q: Are there packaging considerations when substituting these parts?

A: Yes. The RNF12FTC127R is supplied in Tape & Reel format, while the CMF55127R00FHEB is supplied in Cut Tape format. Procurement and assembly processes may require adjustment based on available handling equipment and minimum order quantities.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the RNF12FTC127R and CMF55127R00FHEB are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with identical HTSUS codes (8533.21.0090).

Q: What is the moisture-resistant feature in the CMF55127R00FHEB?

A: The CMF55127R00FHEB includes moisture-resistant properties as part of its design. This provides enhanced reliability in humid or moisture-prone environments compared to the standard flame retardant coating of the RNF12FTC127R.