RNMF12FTD2K21 Equivalent & Substitute Parts

Part Overview

The RNMF12FTD2K21 is a 2.21 kOhms ±1% metal film axial resistor rated at 0.5W (1/2W) manufactured by Stackpole Electronics Inc. This component is classified as Active product status and is ROHS3 compliant. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical compatibility, and regulatory compliance to support design flexibility and supply chain continuity.

Substiute Parts

RNMF12FTD2K21

Stackpole Electronics IncIn Stock: 1022RNMF12FTD2K21 Datasheet

Current PartRFQ

CMF552K2100FKEB

Vishay DaleIn Stock: 1631CMF552K2100FKEB Datasheet

DirectRFQ

CMF552K2100DHR6

Vishay DaleIn Stock: 1886CMF552K2100DHR6 Datasheet

UpgradeRFQ

CMF552K2100FHEB

Vishay DaleIn Stock: 15758CMF552K2100FHEB Datasheet

UpgradeRFQ

CPF12K2100FKEE6

Vishay DaleIn Stock: 2099CPF12K2100FKEE6 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts are grouped based on the following criteria:

Direct Substitutes (Electrical & Mechanical Equivalence): Parts matching 2.21 kOhms resistance, ±1% tolerance, 0.5W power rating, metal film composition, and axial package configuration.

Upgrade Substitutes (Enhanced Specifications): Parts exceeding the main part specifications in tolerance (±0.5%), temperature coefficient (±50ppm/°C), or power rating (1W), while maintaining the same resistance value and package type.

Key Substitution Parameters:

• Resistance value: 2.21 kOhms (exact match required)
• Tolerance: ±1% minimum (±0.5% acceptable as upgrade)
• Power rating: 0.5W minimum (1W acceptable as upgrade)
• Package: Axial (mechanical compatibility)
• Composition: Metal Film

Parameter Comparison

Engineering Selection Recommendations

CMF552K2100FKEB: Direct substitute with identical electrical specifications and ROHS3 compliance. Extended operating temperature range (-55°C ~ 175°C) provides additional thermal margin. Suitable for direct replacement in applications requiring equivalent performance.

CMF552K2100FHEB: Direct substitute with ROHS3 compliance and improved temperature coefficient (±50ppm/°C). Extended operating temperature range supports applications with elevated thermal requirements. Recommended for designs prioritizing temperature stability.

CPF12K2100FKEE6: Upgrade substitute with 1W power rating and extended operating temperature range (-65°C ~ 230°C). ROHS3 compliant. Suitable for applications requiring higher power dissipation capability or broader temperature operation.

CMF552K2100DHR6: Upgrade substitute with ±0.5% tolerance and ±50ppm/°C temperature coefficient. RoHS non-compliant status restricts use in applications requiring regulatory compliance. Consider only when compliance requirements do not apply.

Frequently Asked Questions (FAQ)

Q: Can CMF552K2100FKEB replace RNMF12FTD2K21 directly? A: Yes. Both parts share identical resistance (2.21 kOhms), tolerance (±1%), power rating (0.5W), and composition (metal film). Axial package compatibility is confirmed. ROHS3 compliance is maintained.

Q: What is the difference between CMF552K2100FHEB and CMF552K2100FKEB? A: Both are direct substitutes with identical electrical specifications. CMF552K2100FHEB features improved temperature coefficient (±50ppm/°C vs ±100ppm/°C), providing superior temperature stability. Operating temperature range is identical (-55°C ~ 175°C).

Q: Is CPF12K2100FKEE6 a suitable replacement? A: CPF12K2100FKEE6 is an upgrade substitute with doubled power rating (1W vs 0.5W) and extended operating temperature range (-65°C ~ 230°C). It is electrically and mechanically compatible but occupies the same physical footprint. Use when higher power dissipation or broader temperature operation is required.

Q: Why is CMF552K2100DHR6 listed as an option if it is RoHS non-compliant? A: CMF552K2100DHR6 is included for reference as an upgrade option with superior tolerance (±0.5%) and temperature coefficient (±50ppm/°C). RoHS non-compliance restricts its use to applications where regulatory compliance is not mandated.

Q: Are packaging differences significant for substitution? A: The main part is supplied in Tape & Reel (TR) format, while substitute parts are supplied in Cut Tape (CT) format. Both formats contain identical components; packaging format affects handling and automated assembly compatibility only. Verify compatibility with your procurement and assembly processes.

Q: What parameters must match for a valid substitution? A: Resistance value (2.21 kOhms), tolerance (±1% minimum), power rating (0.5W minimum), composition (metal film), and package type (axial) are mandatory matching parameters. Temperature coefficient and operating range may be equal or superior in substitute parts.