RNF12FTC4K42 Equivalent & Substitute Parts

Part Overview

The RNF12FTC4K42 is a 4.42 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 with stable performance across industrial temperature ranges. The part maintains Active product status with 1023 units in current inventory. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained within the allowed parameter tolerances for this resistor category.

Substiute Parts

RNF12FTC4K42

Stackpole Electronics IncIn Stock: 1076RNF12FTC4K42 Datasheet

Current PartRFQ

CMF554K4200FHEB

Vishay DaleIn Stock: 1912CMF554K4200FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNF12FTC4K42 are qualified based on the following critical parameters:

• Resistance Value: Must be 4.42 kOhms
• Tolerance: Must be ±1%
• Power Rating: Must be 0.5W (1/2W)
• Composition: Must be Metal Film
• Package Type: Must be Axial
• Temperature Coefficient: Must be ±50ppm/°C
• Compliance: Must maintain ROHS3 Compliant status

The CMF554K4200FHEB from Vishay Dale meets all these electrical and mechanical requirements. Both parts share identical resistance, tolerance, power rating, composition, and temperature coefficient specifications. The axial package configuration ensures mechanical compatibility in existing circuit board layouts. Both parts maintain ROHS3 compliance and are suitable for equivalent circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both the RNF12FTC4K42 and CMF554K4200FHEB are Active status components with full ROHS3 compliance. The CMF554K4200FHEB provides an extended operating temperature range to 175°C compared to 155°C for the RNF12FTC4K42, offering additional thermal margin in high-temperature applications. The CMF554K4200FHEB includes moisture-resistant features in addition to flame retardant coating. Selection between these parts should be based on packaging format requirements (Tape & Reel versus Cut Tape) and specific application temperature demands. Both parts satisfy the core electrical specifications for 4.42 kOhms ±1% 0.5W metal film resistor applications.

Frequently Asked Questions (FAQ)

Q: Can CMF554K4200FHEB replace RNF12FTC4K42 in existing designs?

A: Yes. Both parts share identical resistance (4.42 kOhms), tolerance (±1%), power rating (0.5W), composition (metal film), temperature coefficient (±50ppm/°C), and axial package configuration. Electrical and mechanical compatibility is maintained.

Q: What is the difference in physical dimensions?

A: The RNF12FTC4K42 measures 0.108" Dia x 0.344" L (2.75mm x 8.75mm). The CMF554K4200FHEB measures 0.090" Dia x 0.240" L (2.29mm x 6.10mm). The substitute part is physically smaller, which may affect board layout considerations.

Q: Are there temperature range differences?

A: The RNF12FTC4K42 operates from -55°C to 155°C. The CMF554K4200FHEB operates from -55°C to 175°C. The substitute part provides 20°C additional upper temperature capability.

Q: What packaging formats are available?

A: The RNF12FTC4K42 is supplied in Tape & Reel (TR) format. The CMF554K4200FHEB is supplied in Cut Tape (CT) format. Packaging selection depends on assembly process requirements.

Q: Do both parts meet compliance requirements?

A: Yes. Both the RNF12FTC4K42 and CMF554K4200FHEB are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export purposes.