RL-7747-500

Current Sense Transformers Overview

The RL-7747-500 is a current sense transformer manufactured by Renco Electronics, Inc. It features a turns ratio of 500:1 and supports a frequency range of 47Hz to 400Hz. The device has a maximum primary current rating of 40 A. Electrical characteristics include a primary DC resistance (DCR) of 0.3mOhm and a secondary DCR of 21mOhm. It utilizes an invasive mounting type with through-hole installation. The insulation class is B (130°C), and it withstands 300V insulation voltage.

Current Sense Transformers Feature Summary

• Provides galvanic isolation for current measurement in AC applications
• Designed for invasive series insertion into the primary circuit
• Operates within a defined low-frequency bandwidth suitable for power monitoring

Current Sense Transformers Applications

• AC current monitoring in power supplies
• Overcurrent protection circuits
• Power quality analysis equipment

Current Sense Transformers Procurement Notes

Verify the specific suffix designation against the manufacturer's latest documentation to ensure correct turns ratio and electrical parameters. Confirm that the through-hole package style matches the target PCB layout requirements. Check RoHS compliance status if environmental regulations apply to the end product assembly process.

Current Sense Transformers Selection Notes

Select this component when a high-isolation current sensor is required for frequencies between 47Hz and 400Hz. Ensure the primary circuit can accommodate the invasive series connection method. Verify that the 40A maximum current rating exceeds the peak operational current of the application to prevent saturation or damage.

Current Sense Transformers Part Context

This part belongs to the RL-7747 family of current sense transformers from Renco Electronics. The family includes variants with different turns ratios, such as the RL-7747-1000 which offers a 1000:1 ratio. These components are standardized invasive sensors designed for reliable performance in industrial and commercial power electronics environments.

Current Sense Transformers Replacement Considerations

Direct substitutes may include other models within the RL-7747 series, such as the RL-7747-1000, provided the system design accommodates the different 1000:1 turns ratio. Verify pinout compatibility and physical dimensions before swapping.