RNF12FTC30K9 Equivalent & Substitute Parts

Part Overview

The RNF12FTC30K9 is a 30.9 kOhms ±1% metal film axial through-hole resistor rated at 0.5W (1/2W) manufactured by Stackpole Electronics Inc. This component features flame retardant coating and safety-grade construction, designed for applications requiring precision resistance values with reliable performance across industrial temperature ranges. The part is currently in active production status with 661 pieces available in stock. Substitute parts are identified to provide design flexibility, supply chain alternatives, and equivalent electrical performance for applications where the original part may be unavailable or where alternative packaging formats are preferred.

Substiute Parts

RNF12FTC30K9

Stackpole Electronics IncIn Stock: 722RNF12FTC30K9 Datasheet

Current PartRFQ

CMF5530K900FHEB

Vishay DaleIn Stock: 3560CMF5530K900FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF12FTC30K9 is determined by the following critical parameters:

• Resistance value: 30.9 kOhms (exact match required)
• Tolerance: ±1% (equivalent or tighter tolerance acceptable)
• Power rating: 0.5W minimum (equal or higher acceptable)
• Composition: Metal film (maintains electrical characteristics)
• Package type: Axial through-hole (mechanical compatibility)
• Temperature coefficient: ±50ppm/°C or better (stability requirement)
• Operating temperature range: Minimum -55°C to 155°C coverage
• Regulatory compliance: ROHS3 Compliant, REACH Unaffected

The CMF5530K900FHEB from Vishay Dale meets all substitution criteria with identical electrical specifications and enhanced operating temperature range (-55°C to 175°C), making it a direct functional equivalent.

Parameter Comparison

Engineering Selection Recommendations

Both the RNF12FTC30K9 and CMF5530K900FHEB are active production components with full ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for industrial and commercial applications.

The CMF5530K900FHEB offers an extended operating temperature range to 175°C compared to the RNF12FTC30K9's 155°C maximum, providing additional thermal margin for high-temperature environments. The Vishay Dale component also includes moisture-resistant features in addition to flame retardant coating.

Physical dimensions differ between the two parts: the CMF5530K900FHEB is smaller (0.090" diameter vs. 0.108", and 0.240" length vs. 0.344"), which may be advantageous for space-constrained PCB layouts. Packaging format differs (Cut Tape vs. Tape & Reel), affecting procurement and assembly processes.

Selection between these parts should be based on specific application requirements regarding operating temperature limits, available PCB space, and packaging compatibility with assembly equipment.

Frequently Asked Questions (FAQ)

Q: Can the CMF5530K900FHEB directly replace the RNF12FTC30K9 in all applications?

A: Yes, from an electrical standpoint. Both components have identical resistance (30.9 kOhms), tolerance (±1%), power rating (0.5W), and temperature coefficient (±50ppm/°C). Physical dimensions differ, so PCB layout verification is required. The extended temperature range of the CMF5530K900FHEB (-55°C to 175°C vs. -55°C to 155°C) makes it suitable for higher-temperature applications.

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

A: The RNF12FTC30K9 measures 0.108" diameter x 0.344" length (2.75mm x 8.75mm). The CMF5530K900FHEB measures 0.090" diameter x 0.240" length (2.29mm x 6.10mm). The Vishay Dale component is more compact, which may affect PCB routing and component placement.

Q: Are both parts RoHS compliant?

A: Yes, both the RNF12FTC30K9 and CMF5530K900FHEB are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: What packaging formats are available?

A: The RNF12FTC30K9 is supplied in Tape & Reel (TR) format. The CMF5530K900FHEB is supplied in Cut Tape (CT) format. Packaging selection affects procurement quantities and assembly line compatibility.

Q: Do these resistors have moisture sensitivity concerns?

A: Neither component has moisture sensitivity level (MSL) classification. The CMF5530K900FHEB includes explicit moisture-resistant features, while the RNF12FTC30K9 specifies flame retardant coating and safety features. Both are suitable for standard industrial environments.