RNF12BTC4K99 Equivalent & Substitute Parts

Part Overview

The RNF12BTC4K99 is a 4.99 kOhms ±0.1% 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 precision applications requiring tight tolerance specifications. The part is currently active in production with 1089 units in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the allowed parameter range.

Substiute Parts

RNF12BTC4K99

Stackpole Electronics IncIn Stock: 1190RNF12BTC4K99 Datasheet

Current PartRFQ

CMF554K9900BHEB

Vishay DaleIn Stock: 3802CMF554K9900BHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF12BTC4K99 is determined by the following critical parameters:

• Electrical Match: Resistance value (4.99 kOhms), tolerance (±0.1%), power rating (0.5W), and temperature coefficient (±50ppm/°C) must be identical
• Composition: Metal film construction required
• Package: Axial through-hole configuration mandatory
• Compliance: ROHS3 compliance and EAR99 ECCN classification required
• Temperature Range: Operating temperature must encompass or exceed the specified range

The CMF554K9900BHEB from Vishay Dale meets all substitution criteria with identical electrical specifications and compatible mechanical characteristics.

Parameter Comparison

Engineering Selection Recommendations

Both the RNF12BTC4K99 and CMF554K9900BHEB are active production components with ROHS3 compliance and EAR99 classification. The CMF554K9900BHEB provides an extended operating temperature range (-55°C ~ 175°C versus -55°C ~ 155°C) and includes moisture-resistant features in addition to flame retardant coating. Selection between these parts should be based on application temperature requirements and environmental exposure conditions. Both components satisfy identical electrical and mechanical substitution criteria.

Frequently Asked Questions (FAQ)

Q: Can CMF554K9900BHEB replace RNF12BTC4K99 in all applications?

A: Yes, provided the application operating temperature does not exceed 155°C. The CMF554K9900BHEB supports operation to 175°C, making it suitable for higher-temperature environments where the RNF12BTC4K99 may be limited.

Q: Are the physical dimensions compatible?

A: Both components use axial package configuration. The RNF12BTC4K99 measures 0.108" Dia x 0.344" L (2.75mm x 8.75mm), while the CMF554K9900BHEB measures 0.090" Dia x 0.240" L (2.29mm x 6.10mm). The substitute part is physically smaller and will fit in any footprint designed for the main part.

Q: What is the difference in packaging format?

A: The RNF12BTC4K99 is supplied in Tape & Reel (TR) format, while the CMF554K9900BHEB is supplied in Cut Tape (CT) format. Both are suitable for automated assembly processes.

Q: Are both parts RoHS compliant?

A: Yes, both the RNF12BTC4K99 and CMF554K9900BHEB are ROHS3 compliant and REACH unaffected.

Q: What is the tolerance specification and why is it important?

A: Both parts maintain ±0.1% tolerance, critical for precision circuit applications requiring tight resistance accuracy. This specification is identical across both components.