RNF14FAD1R21 Equivalent & Substitute Parts

Part Overview

The RNF14FAD1R21 is a 1.21 Ohm ±1% metal film through-hole resistor rated at 0.25W (1/4W) with axial leads, manufactured by Stackpole Electronics Inc. This component features flame retardant coating and safety-grade construction, designed for applications requiring precision resistance in compact form factors. The part is currently active in production with 720 units in stock. Substitute parts are identified to provide procurement flexibility while maintaining identical electrical and mechanical specifications.

Substiute Parts

RNF14FAD1R21

Stackpole Electronics IncIn Stock: 732RNF14FAD1R21 Datasheet

Current PartRFQ

RNF14FTD1R21

Stackpole Electronics IncIn Stock: 937RNF14FTD1R21 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF14FAD1R21 is determined by strict equivalence across the following parameters:

• Resistance value: 1.21 Ohms
• Tolerance: ±1%
• Power rating: 0.25W (1/4W)
• Composition: Metal Film
• Temperature coefficient: ±100ppm/°C
• Operating temperature range: -55°C to 155°C
• Package configuration: Axial through-hole
• Physical dimensions: 0.093" Dia × 0.250" L (2.35mm × 6.35mm)
• Compliance certifications: ROHS3 Compliant, REACH Unaffected

The identified substitute part maintains all electrical and mechanical specifications. The only difference is packaging format, which does not affect component functionality or performance in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both RNF14FAD1R21 and RNF14FTD1R21 are active production components from Stackpole Electronics Inc with identical electrical performance and mechanical compatibility. Selection between these parts is based on packaging requirements and inventory availability:

• RNF14FAD1R21 (Tape & Box): Suitable for lower-volume applications and manual assembly processes
• RNF14FTD1R21 (Tape & Reel): Optimized for automated assembly and high-volume production environments

Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility across global markets.

Frequently Asked Questions (FAQ)

Q: Can RNF14FTD1R21 be used as a direct replacement for RNF14FAD1R21?

A: Yes. Both parts are electrically and mechanically identical. The difference is packaging format only (Tape & Box versus Tape & Reel), which does not affect circuit performance or component functionality.

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

A: Tape & Box (TB) packaging is suitable for manual assembly and lower-volume applications. Tape & Reel (TR) packaging is designed for automated pick-and-place assembly systems and high-volume production. The resistor component itself is identical in both formats.

Q: Are there any compliance differences between these parts?

A: No. Both parts carry identical certifications: ROHS3 Compliant and REACH Unaffected. They meet the same regulatory requirements for use in electronic equipment.

Q: Can these resistors be used interchangeably in PCB assembly?

A: Yes, provided the assembly process accommodates the packaging format. Manual assembly can use either format. Automated assembly requires Tape & Reel format. Once soldered to the PCB, the components are functionally identical.

Q: What is the temperature coefficient significance?

A: The ±100ppm/°C temperature coefficient indicates the resistor's resistance change per degree Celsius. Both parts have identical temperature stability across the -55°C to 155°C operating range, ensuring consistent performance in varying thermal environments.