RNF12FTC20R0 Equivalent & Substitute Parts

Part Overview

The RNF12FTC20R0 is a 20 Ohms ±1% 0.5W through-hole axial resistor manufactured by Stackpole Electronics Inc. This metal film resistor features flame retardant coating and safety construction, designed for applications requiring precision resistance in compact form factors. The part is currently Active in product status with 980 pieces available in inventory. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are required due to supply constraints, design flexibility, or application-specific packaging preferences.

Substiute Parts

RNF12FTC20R0

Stackpole Electronics IncIn Stock: 1050RNF12FTC20R0 Datasheet

Current PartRFQ

CMF5520R000FHEB

Vishay DaleIn Stock: 4847CMF5520R000FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNF12FTC20R0 are qualified based on the following electrical and mechanical parameters:

• Resistance value: 20 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.5W / 1/2W (exact match required)
• Composition: Metal Film (exact match required)
• Temperature coefficient: ±50ppm/°C (exact match required)
• Package type: Axial (exact match required)
• Operating temperature range: Minimum -55°C, maximum ≥155°C
• Compliance: ROHS3 Compliant, REACH Unaffected

The CMF5520R000FHEB from Vishay Dale meets all electrical specifications and mechanical requirements. Physical dimensions differ slightly, and the substitute offers extended operating temperature range (-55°C ~ 175°C) and additional moisture resistance features. Both parts are Active products with ROHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

Both the RNF12FTC20R0 and CMF5520R000FHEB are Active products with ROHS3 compliance and REACH Unaffected status, making them suitable for equivalent circuit applications. Selection between these parts should be based on:

Packaging format requirements: The RNF12FTC20R0 is supplied in Tape & Reel format, while the CMF5520R000FHEB is supplied in Cut Tape format. Automated assembly processes may have specific packaging requirements.

Physical dimensions: The CMF5520R000FHEB is smaller in both diameter and length, which may be advantageous in space-constrained designs. The RNF12FTC20R0 has larger dimensions that may be preferred for manual assembly or specific PCB layout requirements.

Operating temperature margin: The CMF5520R000FHEB provides extended upper temperature rating (175°C vs. 155°C), offering additional thermal margin for applications operating near the upper temperature limit.

Moisture resistance: The CMF5520R000FHEB includes moisture resistant features, beneficial for applications in humid or corrosive environments.

Frequently Asked Questions (FAQ)

Q: Can the CMF5520R000FHEB replace the RNF12FTC20R0 in all applications?

A: Yes, provided that the physical dimensions and packaging format are compatible with your assembly process and PCB layout. Both parts have identical electrical specifications (20 Ohms ±1%, 0.5W, ±50ppm/°C) and meet the same compliance standards.

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

A: The RNF12FTC20R0 measures 0.108" diameter x 0.344" length (2.75mm x 8.75mm). The CMF5520R000FHEB measures 0.090" diameter x 0.240" length (2.29mm x 6.10mm). The substitute is smaller in both dimensions.

Q: Does the extended operating temperature range of the CMF5520R000FHEB affect circuit performance?

A: No. Both parts maintain the same temperature coefficient (±50ppm/°C) across their respective operating ranges. The extended range of the CMF5520R000FHEB (-55°C ~ 175°C vs. -55°C ~ 155°C) provides additional thermal margin without affecting performance within the RNF12FTC20R0's original range.

Q: Are there packaging considerations when switching between these parts?

A: Yes. The RNF12FTC20R0 is supplied in Tape & Reel format, while the CMF5520R000FHEB is supplied in Cut Tape format. Verify that your assembly equipment and procurement processes support the substitute packaging format.

Q: Do both parts meet the same compliance requirements?

A: Yes. Both the RNF12FTC20R0 and CMF5520R000FHEB are ROHS3 Compliant and REACH Unaffected, meeting equivalent environmental and regulatory standards.