RNF12FTC845R Equivalent & Substitute Parts

Part Overview

The RNF12FTC845R is a 845 Ohms ±1% 0.5W through-hole axial resistor manufactured by Stackpole Electronics Inc. This metal film resistor features flame retardant coating and safety design, suitable for applications requiring precision resistance values in compact form factors. The part is currently Active in product status with 1173 pieces in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Substiute Parts

RNF12FTC845R

Stackpole Electronics IncIn Stock: 1188RNF12FTC845R Datasheet

Current PartRFQ

CMF55845R00FHEB

Vishay DaleIn Stock: 3370CMF55845R00FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNF12FTC845R are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Electrical Parameters (Critical):

• Resistance value: 845 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.5W / 1/2W (exact match required)
• Temperature coefficient: ±50ppm/°C (exact match required)
• Composition: Metal Film (exact match required)

Mechanical Parameters (Critical):

• Package type: Axial (exact match required)
• Number of terminations: 2 (exact match required)

Compliance Parameters:

• RoHS Status: ROHS3 Compliant (minimum requirement)
• REACH Status: REACH Unaffected (minimum requirement)

The CMF55845R00FHEB from Vishay Dale meets all critical electrical and mechanical parameters. Operating temperature range extends to 175°C (versus 155°C for the main part), providing enhanced thermal performance. Both parts are Active products with full regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

Both the RNF12FTC845R and CMF55845R00FHEB are Active products with full ROHS3 compliance and REACH Unaffected status, meeting current regulatory requirements for electronic component procurement.

The CMF55845R00FHEB provides an extended operating temperature range to 175°C and includes moisture-resistant features in addition to flame retardant coating. These characteristics make it suitable for applications requiring enhanced environmental protection.

Packaging format differs between the two parts: the RNF12FTC845R is supplied in Tape & Reel format, while the CMF55845R00FHEB is supplied in Cut Tape format. Selection should account for assembly line requirements and inventory management practices.

Frequently Asked Questions (FAQ)

Q: Can the CMF55845R00FHEB directly replace the RNF12FTC845R in existing designs?

A: Yes. Both parts share identical electrical specifications (845 Ohms ±1%, 0.5W, ±50ppm/°C) and axial package configuration with two terminations. The extended temperature range and moisture-resistant features of the CMF55845R00FHEB provide equivalent or enhanced performance for the specified resistance and power rating.

Q: What is the difference in physical dimensions between these parts?

A: The RNF12FTC845R measures 0.108" diameter × 0.344" length (2.75mm × 8.75mm). The CMF55845R00FHEB measures 0.090" diameter × 0.240" length (2.29mm × 6.10mm). The substitute part is physically smaller, which may affect board layout and mechanical clearance considerations.

Q: Are there packaging format implications for procurement?

A: The RNF12FTC845R is supplied in Tape & Reel (TR) format, while the CMF55845R00FHEB is supplied in Cut Tape (CT) format. Assembly operations should verify compatibility with existing pick-and-place equipment and tape handling systems.

Q: Do both parts meet the same regulatory standards?

A: Yes. Both the RNF12FTC845R and CMF55845R00FHEB are ROHS3 Compliant and REACH Unaffected, meeting current regulatory requirements for electronic components in regulated markets.

Q: What is the significance of the moisture-resistant feature in the CMF55845R00FHEB?

A: The CMF55845R00FHEB includes moisture-resistant coating in addition to flame retardant coating. This feature provides enhanced protection in high-humidity environments or applications with extended storage periods before assembly.