CF12JB3R90

Overview

The CF12JB3R90 is a carbon film axial through-hole resistor manufactured by Stackpole Electronics Inc. It features a resistance value of 3.9 ohms with a tolerance of ±5%. The component has a power rating of 0.5W (1/2W) and operates within a temperature range of -55°C to +155°C. Its physical dimensions are 0.106 inches in diameter by 0.335 inches in length (2.70mm x 8.50mm). The device exhibits a temperature coefficient of ±400ppm/°C and includes flameproof coating for safety.

Feature Summary

• Flameproof construction ensures safety during operation
• Carbon film composition provides stable resistive performance
• Axial leaded package facilitates standard PCB mounting

Applications

• General purpose electronic circuitry
• Current limiting applications
• Voltage divider networks

Procurement Notes

Verify the specific manufacturer part number CF12JB3R90 against official Stackpole documentation to confirm compliance with RoHS3 standards. Ensure that the required power derating curves align with the intended operating environment temperatures. Confirm packaging type availability matches production requirements, as bulk or tape options may vary by region.

Selection Notes

Select this component when a low-cost, general-purpose axial resistor is required for circuits operating at moderate power levels. The 3.9-ohm value suits low-resistance current sensing or termination tasks. Consider the ±400ppm/°C temperature coefficient for thermal stability requirements. Verify that the 0.5W power rating accommodates peak load conditions without excessive heating.

Part Context

This resistor belongs to the CF series of carbon film components from Stackpole Electronics. The series is designed for cost-effective solutions in consumer and industrial electronics. The 'JB' suffix typically denotes the 1/2W power rating and ±5% tolerance class within the product line.

Replacement Considerations

CF12JT3R90 offers equivalent electrical specifications with potentially tighter tolerances or different packaging configurations.