RNF12FTC422R Equivalent & Substitute Parts

Part Overview

The RNF12FTC422R is a 422 Ohm ±1% metal film through-hole resistor rated at 0.5W (1/2W) in axial package configuration, manufactured by Stackpole Electronics Inc. This component features flame retardant coating and safety-grade construction suitable for industrial and consumer electronics applications. The part maintains Active product status with 860 units in current inventory. Substitute parts are identified when equivalent electrical specifications, mechanical compatibility, and regulatory compliance can be maintained across alternative manufacturers.

Substiute Parts

RNF12FTC422R

Stackpole Electronics IncIn Stock: 900RNF12FTC422R Datasheet

Current PartRFQ

CMF55422R00FHEB

Vishay DaleIn Stock: 6866CMF55422R00FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF12FTC422R is determined by the following critical parameters:

• Resistance value: 422 Ohms (exact match required)
• Tolerance: ±1% (equivalent or tighter tolerance acceptable)
• Power rating: 0.5W minimum (equal or higher acceptable)
• Composition: Metal film construction
• Package: Axial through-hole configuration
• Temperature coefficient: ±50ppm/°C or better
• Regulatory compliance: ROHS3 Compliant, REACH Unaffected
• Operating temperature: Minimum -55°C to 155°C range support

The CMF55422R00FHEB from Vishay Dale meets all substitution criteria with identical electrical specifications and enhanced operating temperature range (-55°C to 175°C). Both components are Active status products with equivalent certifications.

Parameter Comparison

Engineering Selection Recommendations

Both the RNF12FTC422R and CMF55422R00FHEB are Active status components with full ROHS3 compliance and REACH Unaffected certification. The CMF55422R00FHEB provides an extended operating temperature range to 175°C and includes moisture-resistant features, offering enhanced environmental performance. Selection between these parts should be based on application temperature requirements, packaging format availability (Tape & Reel versus Cut Tape), and supply chain considerations. Both components satisfy identical electrical and mechanical substitution criteria for 422 Ohm ±1% 0.5W axial resistor applications.

Frequently Asked Questions (FAQ)

Q: Can CMF55422R00FHEB replace RNF12FTC422R in all applications?

A: Yes, provided the application operates within the -55°C to 155°C range. The CMF55422R00FHEB supports extended temperature operation to 175°C, making it suitable for higher-temperature environments where the RNF12FTC422R may not be rated.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel packaging (RNF12FTC422R) is supplied on continuous carrier tape for automated assembly equipment. Cut Tape packaging (CMF55422R00FHEB) is supplied in individual tape segments, suitable for manual assembly or lower-volume production runs.

Q: Are the physical dimensions compatible?

A: Both components use axial through-hole package configuration. The RNF12FTC422R measures 0.108" diameter × 0.344" length, while the CMF55422R00FHEB measures 0.090" diameter × 0.240" length. Both fit standard 0.1" pitch PCB hole spacing, though the CMF55 series has a more compact form factor.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the RNF12FTC422R and CMF55422R00FHEB are ROHS3 Compliant and REACH Unaffected, meeting equivalent regulatory standards for industrial and consumer electronics applications.

Q: What is the significance of the ±50ppm/°C temperature coefficient?

A: The temperature coefficient indicates resistance value drift with temperature changes. At ±50ppm/°C, a 422 Ohm resistor will experience approximately 0.021 Ohm change per degree Celsius, ensuring stable performance across the specified operating temperature range for both components.