CF12JA4R70 Equivalent & Substitute Parts

Part Overview

The CF12JA4R70 is a 4.7 Ohm, ±5% tolerance, 0.5W (1/2W) 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 fixed resistance values in compact axial packages. The part maintains Active product status with robust inventory availability. Substitute parts are identified to address packaging format preferences, supply chain flexibility, and application-specific requirements while maintaining electrical and mechanical equivalence.

Substiute Parts

CF12JA4R70

Stackpole Electronics IncIn Stock: 786CF12JA4R70 Datasheet

Current PartRFQ

CFM12JT4R70

Stackpole Electronics IncIn Stock: 18888CFM12JT4R70 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CF12JA4R70 is determined by strict equivalence across the following critical parameters:

• Electrical Equivalence: Resistance value (4.7 Ohms), tolerance (±5%), and power rating (0.5W) must be identical
• Material Composition: Carbon film construction with flame retardant coating and safety features must be maintained
• Thermal Performance: Temperature coefficient (±400ppm/°C) and operating range (-55°C to +155°C) must match
• Regulatory Compliance: RoHS3 compliance and REACH unaffected status must be preserved
• Mechanical Form Factor: Axial package configuration with two terminations required
• Packaging Format: Substitutes may differ in distribution packaging (Tape & Box versus Cut Tape) without affecting functional equivalence

The CFM12JT4R70 qualifies as a direct substitute based on identical electrical specifications, material composition, thermal characteristics, and regulatory compliance, with the primary distinction being packaging format and physical dimensions within the axial form factor.

Parameter Comparison

Engineering Selection Recommendations

Both CF12JA4R70 and CFM12JT4R70 maintain identical electrical performance, thermal stability, and regulatory compliance status. Selection between these parts is determined by packaging and procurement requirements rather than functional capability.

The CF12JA4R70 in Tape & Box format is suitable for applications requiring bulk quantities with standard storage and handling procedures. The CFM12JT4R70 in Cut Tape format accommodates automated assembly processes and applications with component-level distribution requirements.

Physical dimension differences (0.106" vs 0.091" diameter; 0.335" vs 0.256" length) reflect manufacturing variations within the axial resistor category and do not affect electrical performance or circuit board layout compatibility for standard through-hole applications.

Both parts maintain Active product status with manufacturer support and are suitable for new design implementations and legacy system maintenance.

Frequently Asked Questions (FAQ)

Q: Are CF12JA4R70 and CFM12JT4R70 electrically identical?

A: Yes. Both parts provide 4.7 Ohms ±5% at 0.5W with identical temperature coefficient (±400ppm/°C), operating range (-55°C to +155°C), and carbon film composition with flame retardant coating.

Q: What is the primary difference between these parts?

A: The primary difference is packaging format. CF12JA4R70 is supplied in Tape & Box (TB) format, while CFM12JT4R70 is supplied in Cut Tape (CT) format. Physical dimensions also vary slightly within the axial form factor.

Q: Can CFM12JT4R70 replace CF12JA4R70 in existing designs?

A: Yes, for through-hole applications. The axial package configuration and electrical specifications are equivalent. Verify that circuit board layout accommodates the dimensional variation (0.091" vs 0.106" diameter).

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both CF12JA4R70 and CFM12JT4R70 are ROHS3 compliant and REACH unaffected.

Q: Which part should be selected for automated assembly?

A: CFM12JT4R70 in Cut Tape format is optimized for automated component placement and tape-based feeding systems.

Q: Which part is better for manual assembly or prototyping?

A: CF12JA4R70 in Tape & Box format provides convenient bulk quantities suitable for manual assembly workflows and prototyping environments.