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  4. Power saving X capacitor bleeder HF81 (Monolithic Power Systems, Inc.)
Power saving X capacitor bleeder HF81-HF81
Power saving X capacitor bleeder HF81-Monolithic Power Systems, Inc.

Power saving X capacitor bleeder HF81
Monolithic Power Systems, Inc.

About This Product

■Summary

The HF81 is an innovative two-terminal IC that automatically discharges the X capacitor while eliminating power losses and ensuring the power supply complies with safety standards. The HF81 acts as a smart high voltage switch when placed in series with a discharge resistor (or bleeder resistor). When AC voltage is present, the HF81 blocks the current flowing through the safety discharge resistors, reducing power losses in these components to zero at 230VAC. When disconnected from the AC voltage, the HF81 automatically and safely discharges the X capacitor by closing the circuit through the bleeder resistor and transferring energy away from the exposed AC plug.

■Features and benefits

・When AC voltage is applied, disconnect the series discharge resistor from L-N ・If the AC voltage plug is removed, connect a series discharge resistor to L-N to discharge the X capacitor ・No need for external bias as it is supplied directly from AC voltage ・Complies with safety standards when used before and after the input fuse ・High common mode surge immunity due to no external ground pin ・High differential surge resistance with 1,000V internal JFET ・Creepage distance less than 4mm on package and PCB

■Available product numbers

・HF81GS-P HF81GS-Z HF81GS HF81GS-LF HF81GS-LF-Z ・Part numbers ending in P and Z are the same part. P and Z indicate reel size only

  • Product

    Power saving X capacitor bleeder HF81

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1 Models of Power saving X capacitor bleeder HF81

Image Part Number Price (excluding tax) Isc (mA) Isupply (µA) Vbr (V) Grade Package (mm)
Power saving X capacitor bleeder HF81-Part Number-HF81

HF81

Available upon quote

1.7

15

1,000

Catalog

DIP8, SOIC-8

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About Company Handling This Product

Monolithic Power Systems, Inc.

Company Overview

Monolithic Power Systems (MPS), founded in 1997 and headquartered in San Jose, California, is a manufacturer o...

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