T10135A-400HF

Overview

The T10135A-400HF is a surface-mount current sense transformer manufactured by ITG Electronics, Inc. It features a turns ratio of 1:400 and supports a maximum primary current of 80 A. The device exhibits a primary DC resistance of 0.08 mOhm and a secondary resistance of 50 Ohm. Its maximum inductance is specified as 100 mH. This component is designed for precise current monitoring applications requiring high isolation and low insertion loss.

Feature Summary

• Provides galvanic isolation between primary and secondary circuits via magnetic coupling
• Designed for surface mount technology (SMD) integration into PCB assemblies
• Maintains low primary DC resistance to minimize power loss during operation

Applications

• High-frequency switching power supply current monitoring
• Inverter and motor drive systems requiring precise phase current sensing
• Industrial power conversion equipment with strict isolation requirements

Procurement Notes

Verify the specific suffix HF indicates halogen-free compliance if required by project specifications. Confirm that the 80 A rating aligns with peak operational currents rather than continuous RMS values without thermal derating analysis. Ensure the 1:400 ratio matches the control circuit input impedance requirements. Cross-reference the package dimensions against the mechanical drawing to verify PCB footprint compatibility before finalizing procurement orders.

Selection Notes

Select this model when a 1:400 transformation ratio is necessary for signal scaling to analog-to-digital converters or comparator inputs. The 0.08 mOhm primary resistance makes it suitable for low-voltage drop applications where efficiency is critical. Consider the 100 mH maximum inductance limit to ensure adequate bandwidth for the target switching frequency. Compare against the T10135B series if higher current ratings such as 60 A are insufficient for the specific load profile.

Part Context

This component belongs to the T10135 series of current sense transformers from ITG Electronics, Inc., which offers a range of turn ratios and inductance values. The series is characterized by SMD packaging options and varying primary resistances ranging from 0.08 mOhm to 0.28 mOhm. The T10135A-400HF specifically addresses applications needing high step-down ratios for accurate current feedback in compact electronic designs.

Replacement Considerations

The T10135B-400HF is a related variant within the same product family, though it typically specifies a different primary resistance and current handling capability. Verify electrical equivalence regarding the 1:400 ratio and physical footprint before substitution. No other direct cross-model substitutes are publicly confirmed for this exact specification.