RNF12FTC20K0 Equivalent & Substitute Parts

Part Overview

The RNF12FTC20K0 is a 20 kOhms ±1% 0.5W through-hole axial resistor manufactured by Stackpole Electronics Inc. This metal film resistor features flame retardant coating and safety construction, designed for applications requiring precision resistance values in compact axial packages. The part maintains Active product status with 1160 units in current inventory. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the allowed parameter range for this resistor category.

Substiute Parts

RNF12FTC20K0

Stackpole Electronics IncIn Stock: 1236RNF12FTC20K0 Datasheet

Current PartRFQ

CMF5520K000FHEB

Vishay DaleIn Stock: 10038CMF5520K000FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNF12FTC20K0 are qualified based on the following electrical and mechanical parameters:

• Resistance value: 20 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.5W / 1/2W (exact match required)
• Composition: Metal Film (exact match required)
• Package: Axial through-hole (exact match required)
• Temperature coefficient: ±50ppm/°C (exact match required)
• Compliance: ROHS3 Compliant, REACH Unaffected (exact match required)

The CMF5520K000FHEB from Vishay Dale meets all electrical specifications and mechanical requirements. Physical dimensions differ within acceptable tolerances for axial resistor form factors. Both parts operate within compatible temperature ranges and maintain identical electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

Both the RNF12FTC20K0 and CMF5520K000FHEB maintain Active product status with full regulatory compliance. Selection between these parts is determined by application-specific requirements and supply chain availability.

The RNF12FTC20K0 is the primary specification. The CMF5520K000FHEB serves as a qualified substitute when the primary part is unavailable. The substitute part provides an extended operating temperature range to 175°C compared to the primary part's 155°C maximum, with additional moisture resistance features. Both parts satisfy ROHS3 and REACH compliance requirements for regulated applications.

Physical dimensions differ: the RNF12FTC20K0 measures 0.108" diameter × 0.344" length, while the CMF5520K000FHEB measures 0.090" diameter × 0.240" length. These dimensional variations remain within acceptable tolerances for standard axial resistor mounting in through-hole applications.

Frequently Asked Questions (FAQ)

Q: Can the CMF5520K000FHEB replace the RNF12FTC20K0 in all applications?

A: Yes, the CMF5520K000FHEB meets all electrical specifications and mechanical requirements for direct substitution. The substitute part maintains identical resistance, tolerance, power rating, and temperature coefficient. Physical dimensions differ but remain compatible with standard axial resistor mounting practices.

Q: What is the difference in physical size between these parts?

A: The RNF12FTC20K0 is 0.108" diameter × 0.344" length. The CMF5520K000FHEB is 0.090" diameter × 0.240" length. The substitute part is smaller in both dimensions. PCB layout and mechanical clearance must accommodate the smaller form factor.

Q: Are both parts RoHS compliant?

A: Yes, both the RNF12FTC20K0 and CMF5520K000FHEB are ROHS3 Compliant and REACH Unaffected, meeting current regulatory requirements for electronic components.

Q: What is the temperature operating range for each part?

A: The RNF12FTC20K0 operates from -55°C to 155°C. The CMF5520K000FHEB operates from -55°C to 175°C. The substitute part provides a 20°C higher maximum operating temperature.

Q: What packaging formats are available?

A: The RNF12FTC20K0 is supplied in Tape & Reel (TR) packaging. The CMF5520K000FHEB is supplied in Cut Tape (CT) packaging. Both formats are standard for through-hole axial resistors and compatible with automated assembly equipment.

Q: Do these parts have moisture sensitivity concerns?

A: Neither part has applicable Moisture Sensitivity Level (MSL) ratings. The CMF5520K000FHEB includes moisture resistant features as an additional characteristic. Both parts are suitable for standard storage and handling conditions.