RNF12BTC150K Equivalent & Substitute Parts

Part Overview

The RNF12BTC150K is a 150 kOhm metal film axial resistor manufactured by Stackpole Electronics Inc, rated at 0.5W (1/2W) with ±0.1% tolerance. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. The RNF series has been discontinued, requiring engineers to identify compatible alternatives that maintain the same electrical and mechanical specifications for direct board-level replacement.

Substiute Parts

RNF12BTC150K

Stackpole Electronics IncIn Stock: 1079RNF12BTC150K Datasheet

Current PartRFQ

CMF55150K00BHEB

Vishay DaleIn Stock: 848CMF55150K00BHEB Datasheet

DirectRFQ

CMF55150K00BHRE

Vishay DaleIn Stock: 887CMF55150K00BHRE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the RNF12BTC150K is determined by strict equivalence across the following parameters:

• Resistance Value: 150 kOhms (exact match required)
• Tolerance: ±0.1% (precision specification)
• Power Rating: 0.5W / 1/2W (electrical stress rating)
• Composition: Metal Film (performance characteristics)
• Package: Axial (mechanical form factor)
• Temperature Coefficient: ±50ppm/°C (stability specification)
• Operating Temperature: Minimum -55°C to 155°C support required

The CMF55 series from Vishay Dale meets all electrical and mechanical requirements. Both CMF55150K00BHEB and CMF55150K00BHRE variants are direct functional equivalents, with differences limited to packaging format (Tape & Reel) and regulatory compliance status.

Parameter Comparison

Engineering Selection Recommendations

CMF55150K00BHEB is the primary substitute for new designs and production requiring full regulatory compliance. This part maintains ROHS3 compliance status matching the original RNF12BTC150K and is currently in active production with 744 units in stock. The extended operating temperature range (-55°C ~ 175°C) provides additional thermal margin beyond the original specification.

CMF55150K00BHRE is functionally equivalent but carries RoHS non-compliant status. This variant is suitable only for applications where RoHS compliance is not a requirement. It remains in active production with 860 units available.

Both substitutes feature improved moisture resistance compared to the original part, with identical electrical performance across all critical parameters. The physical size reduction (0.090" diameter vs. 0.108" diameter) may require PCB layout verification for axial lead spacing, though both maintain standard axial package form factor compatibility.

Frequently Asked Questions (FAQ)

Q: Can CMF55150K00BHEB and CMF55150K00BHRE be used interchangeably?

A: Both parts are electrically and mechanically identical. Selection depends on regulatory requirements. CMF55150K00BHEB is ROHS3 compliant; CMF55150K00BHRE is not. Choose based on your product's compliance obligations.

Q: Will the smaller physical dimensions of the CMF55 series cause PCB compatibility issues?

A: The CMF55 variants are 0.090" diameter versus the RNF12BTC150K at 0.108" diameter. Both are standard axial packages. Verify PCB hole spacing and lead routing accommodate the reduced diameter. Axial lead length is also shorter (0.240" vs. 0.344"), requiring layout confirmation.

Q: Are the electrical characteristics truly identical?

A: Yes. Resistance (150 kOhms), tolerance (±0.1%), power rating (0.5W), composition (metal film), and temperature coefficient (±50ppm/°C) are identical. The CMF55 series provides extended operating temperature range (-55°C ~ 175°C vs. -55°C ~ 155°C).

Q: What is the difference between the two CMF55 variants?

A: CMF55150K00BHEB is ROHS3 compliant with REACH affected status. CMF55150K00BHRE is RoHS non-compliant with REACH affected status. All other specifications are identical.

Q: Is the moisture-resistant feature of the CMF55 series a concern for compatibility?

A: No. Enhanced moisture resistance is a performance improvement with no negative compatibility impact. It provides additional environmental protection without affecting electrical or mechanical function.