CFM12JA2R70 Equivalent & Substitute Parts

Part Overview

The CFM12JA2R70 is a 2.7 Ohm ±5% 0.5W through-hole axial resistor manufactured by Stackpole Electronics Inc. This carbon film resistor features flame retardant coating and safety characteristics, designed for general-purpose electronic applications requiring reliable resistance in compact form factors. The part is currently active in production with 788 units in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the same product category.

Substiute Parts

CFM12JA2R70

Stackpole Electronics IncIn Stock: 895CFM12JA2R70 Datasheet

Current PartRFQ

CF12JT2R70

Stackpole Electronics IncIn Stock: 1080CF12JT2R70 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CFM12JA2R70 is determined by strict equivalence in the following parameters:

• Resistance value: 2.7 Ohms (exact match required)
• Tolerance: ±5% (exact match required)
• Power rating: 0.5W / 1/2W (exact match required)
• Composition: Carbon Film (exact match required)
• Package: Axial through-hole (exact match required)
• Temperature coefficient: ±400ppm/°C (exact match required)
• Operating temperature range: -55°C to 155°C (exact match required)
• Regulatory compliance: ROHS3 Compliant, REACH Unaffected (exact match required)

The CF12JT2R70 meets all substitution criteria. Physical dimensions vary slightly (0.106" Dia x 0.335" L versus 0.091" Dia x 0.256" L), and packaging format differs (Tape & Reel versus Tape & Box), but these variations do not affect electrical performance or functional compatibility in standard circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both CFM12JA2R70 and CF12JT2R70 are active production parts from Stackpole Electronics Inc with identical electrical specifications and regulatory compliance status. Selection between these parts is based on packaging and supply requirements rather than electrical performance.

The CFM12JA2R70 is supplied in Tape & Box format, suitable for applications requiring smaller order quantities or mixed component kits. The CF12JT2R70 is supplied in Tape & Reel format, optimized for high-volume automated assembly processes. Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility in target applications.

Frequently Asked Questions (FAQ)

Q: Can CF12JT2R70 replace CFM12JA2R70 in existing circuit designs?

A: Yes. Both parts have identical electrical specifications: 2.7 Ohms ±5% at 0.5W power rating with ±400ppm/°C temperature coefficient and -55°C to 155°C operating range. Axial package compatibility is maintained. The only difference is physical dimension tolerance and packaging format.

Q: What is the difference between Tape & Box and Tape & Reel packaging?

A: Tape & Box (TB) packaging is used for smaller quantities and manual assembly environments. Tape & Reel (TR) packaging is designed for automated pick-and-place assembly systems in high-volume production. Both formats contain the same component on standardized carrier tape.

Q: Are there dimensional compatibility concerns when substituting these parts?

A: Physical dimensions differ slightly: CFM12JA2R70 is 0.091" Dia x 0.256" L, while CF12JT2R70 is 0.106" Dia x 0.335" L. Both are within standard axial resistor tolerances and fit standard PCB hole spacing. Verify board layout clearances if space constraints exist in your specific application.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both CFM12JA2R70 and CF12JT2R70 are ROHS3 compliant and REACH unaffected, meeting current environmental and safety regulations for electronic components.

Q: Which part should I select for new designs?

A: Selection depends on manufacturing volume and assembly method. For automated assembly, CF12JT2R70 (Tape & Reel) is standard. For lower volumes or manual assembly, CFM12JA2R70 (Tape & Box) may be more economical. Both are active production parts with adequate inventory.