RNF18FAD49K9 Equivalent & Substitute Parts

Part Overview

The RNF18FAD49K9 is a 49.9 kOhms ±1% metal film through-hole resistor rated at 0.125W (1/8W) in axial package configuration. Manufactured by Stackpole Electronics Inc, this component features flame retardant coating and safety-rated construction suitable for industrial and commercial applications. The part is currently active in production with ROHS3 compliance and REACH unaffected status. Substitute parts may be required due to packaging format availability, inventory allocation, or supply chain optimization while maintaining identical electrical and mechanical specifications.

Substiute Parts

RNF18FAD49K9

Stackpole Electronics IncIn Stock: 884RNF18FAD49K9 Datasheet

Current PartRFQ

RNF18FTD49K9

Stackpole Electronics IncIn Stock: 48752RNF18FTD49K9 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The RNF18FAD49K9 has one direct substitute within the Stackpole Electronics RNF series: RNF18FTD49K9. Substitution validity is determined by the following parameters that must remain identical:

• Resistance value: 49.9 kOhms
• Tolerance: ±1%
• Power rating: 0.125W (1/8W)
• Composition: Metal Film
• Temperature coefficient: ±100ppm/°C
• Operating temperature range: -55°C to 155°C
• Package configuration: Axial
• Physical dimensions: 0.071" Dia x 0.130" L (1.80mm x 3.30mm)
• Termination count: 2
• Compliance certifications: ROHS3, REACH unaffected

The only difference between the main part and substitute is the packaging format: RNF18FAD49K9 is supplied in Tape & Box (TB) format, while RNF18FTD49K9 is supplied in Cut Tape (CT) format. Both formats contain identical components with no electrical or mechanical variation.

Parameter Comparison

Engineering Selection Recommendations

Both RNF18FAD49K9 and RNF18FTD49K9 are active production components from Stackpole Electronics Inc with identical electrical and mechanical specifications. Selection between these parts should be based on packaging requirements and supply chain considerations:

RNF18FAD49K9 (Tape & Box format) is suitable for applications requiring bulk packaging with protective boxing for storage and distribution.

RNF18FTD49K9 (Cut Tape format) is suitable for high-volume automated assembly operations where cut tape feeding is standard practice.

Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility across industrial and commercial applications. The identical thermal characteristics (±100ppm/°C, -55°C to 155°C operating range) and flame retardant safety features support direct substitution in any circuit design utilizing the RNF18FAD49K9.

Frequently Asked Questions (FAQ)

Q: Can RNF18FTD49K9 be used as a direct replacement for RNF18FAD49K9?

A: Yes. Both parts are electrically and mechanically identical. The only difference is packaging format: Tape & Box versus Cut Tape. Circuit performance, thermal behavior, and reliability characteristics are unchanged.

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

A: Tape & Box (TB) format supplies components on continuous tape wound on a reel and packaged in a protective box. Cut Tape (CT) format supplies components on tape segments cut to specific lengths. Both formats contain the same components; packaging choice depends on assembly equipment and volume requirements.

Q: Are both parts RoHS compliant?

A: Yes. Both RNF18FAD49K9 and RNF18FTD49K9 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: What is the temperature coefficient specification and why is it important?

A: Both parts have a temperature coefficient of ±100ppm/°C. This specification indicates the maximum resistance change per degree Celsius across the operating temperature range (-55°C to 155°C). This parameter is critical for precision circuits where temperature stability is required.

Q: Can these resistors be used in high-temperature applications?

A: Yes. Both parts are rated for continuous operation up to 155°C, supporting high-temperature industrial and automotive applications. The flame retardant coating and safety features provide additional protection in demanding environments.