RNF12FTC2K21 Equivalent & Substitute Parts

Part Overview

The RNF12FTC2K21 is a 2.21 kOhms ±1% 0.5W axial through-hole resistor manufactured by Stackpole Electronics Inc. This metal film resistor features flame retardant coating and safety construction, designed for applications requiring precision resistance values with tight tolerance specifications. The part is currently in active production status with 670 pieces available in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the same resistance value, tolerance, power rating, and package type.

Substiute Parts

RNF12FTC2K21

Stackpole Electronics IncIn Stock: 771RNF12FTC2K21 Datasheet

Current PartRFQ

CMF552K2100FHEB

Vishay DaleIn Stock: 15758CMF552K2100FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF12FTC2K21 is determined by strict equivalence across the following critical parameters:

• Resistance value: 2.21 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.5W / 1/2W (exact match required)
• Composition: Metal Film (exact match required)
• Package configuration: Axial through-hole (exact match required)
• Temperature coefficient: ±50ppm/°C (exact match required)
• Regulatory compliance: ROHS3 Compliant (minimum requirement)

The CMF552K2100FHEB from Vishay Dale meets all substitution criteria. Both parts share identical electrical specifications and axial package geometry, enabling direct functional replacement in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both the RNF12FTC2K21 and CMF552K2100FHEB are active production components with ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component procurement. The CMF552K2100FHEB provides an extended operating temperature range to 175°C compared to the RNF12FTC2K21's 155°C maximum, with additional moisture resistant construction. Selection between these parts should be based on application-specific thermal and environmental requirements, with both parts functionally equivalent for standard circuit applications within the RNF12FTC2K21's specified operating range.

Frequently Asked Questions (FAQ)

Q: Can the CMF552K2100FHEB directly replace the RNF12FTC2K21 in existing designs?

A: Yes. Both resistors share identical resistance value (2.21 kOhms), tolerance (±1%), power rating (0.5W), composition (metal film), and temperature coefficient (±50ppm/°C). The axial package configuration is compatible with existing PCB layouts and through-hole assembly processes.

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

A: The RNF12FTC2K21 measures 0.108" diameter × 0.344" length (2.75mm × 8.75mm). The CMF552K2100FHEB measures 0.090" diameter × 0.240" length (2.29mm × 6.10mm). The CMF552K2100FHEB is physically smaller, which may affect board layout considerations in space-constrained applications.

Q: Are there compliance or certification differences?

A: Both parts are ROHS3 compliant and REACH unaffected. No compliance differentiation exists between the two parts for standard industrial and commercial applications.

Q: What is the significance of the moisture resistant feature on the CMF552K2100FHEB?

A: The CMF552K2100FHEB includes moisture resistant construction as an additional feature. This provides enhanced performance in humid or moisture-prone environments compared to the RNF12FTC2K21's standard flame retardant coating.

Q: Can I use the CMF552K2100FHEB in applications requiring the full -55°C to 155°C range?

A: Yes. The CMF552K2100FHEB's operating range extends to 175°C, which encompasses the RNF12FTC2K21's maximum specification of 155°C. The part is fully compatible for all temperature conditions within the original part's specification.