VTX-151-15520S

Overview

The VTX-151-15520S is a current sense transformer manufactured by Vigortronix, designed for through-hole mounting. It features a primary nominal current of 20 A and a maximum current rating of 40 A across pins 3+4 to 5+6. The device operates with a turns ratio of 1:2000 within a frequency range of 40 Hz to 20 kHz. It exhibits a primary resistance of 500 mOhm (0.5 Ohm) and maintains an accuracy of 1%. Electrical isolation between primary and secondary circuits exceeds 4200 VAC, utilizing Class II insulation materials rated UL94-V0.

Feature Summary

• Provides fully isolated primary-to-secondary electrical separation exceeding 4200 VAC for safety compliance.
• Delivers precise current sensing with 1% accuracy across a wide operational frequency spectrum.
• Supports high peak currents up to 40 A while maintaining nominal operation at 20 A.

Applications

• Current overload sensing in power distribution systems
• Ground fault detection mechanisms
• Precision current metering applications

Procurement Notes

Verify the specific pin configuration and mechanical dimensions against the official Vigortronix datasheet before integration. Confirm that the 40 Hz to 20 kHz frequency range aligns with the target application's signal requirements. Ensure the through-hole footprint matches the PCB design constraints. Validate that the 4200 VAC isolation rating meets the safety standards applicable to the end-use environment.

Selection Notes

Select this component when high-isolation voltage and accurate current replication are required for frequencies extending into the audio range. The 1:2000 ratio suits applications needing significant step-down transformation from primary conductors. Consider the 40 A maximum current limit for transient protection scenarios. The through-hole package offers robust mechanical stability compared to surface-mount alternatives.

Part Context

This part belongs to the Vigortronix VTX-151 series of current transformers, which are engineered for cost-effective current monitoring solutions. The series typically includes variants with different current ratings and ratios, such as the VTX-151-1005 or VTX-151-1566. These components are widely used in industrial electronics where reliable galvanic isolation is critical for measurement integrity and personnel safety.

Replacement Considerations

Direct substitutes must match the 1:2000 ratio, 20 A nominal current, and 40 A maximum current specifications. Verify that alternative parts support the same 40 Hz to 20 kHz frequency range and offer comparable 4200 VAC isolation. Check for identical through-hole pinout configurations to ensure board compatibility without redesign.

FAQ

What is the maximum current the VTX-151-15520S can handle?

The device supports a maximum primary current of 40 A, while its nominal operating current is 20 A.

Does this transformer support frequencies above 20 kHz?

No, the specified operational frequency range is limited to 40 Hz through 20 kHz.

What is the isolation voltage rating?

The primary-to-secondary isolation voltage exceeds 4200 VAC, ensuring robust electrical separation.