HY1906B MOSFET — Specifications & Equivalents

About the HY1906B

The HY1906B is a MOSFET with a drain–source voltage (V_DS) rating of 60 V and a continuous drain current (I_D) of 120 A. It can dissipate up to 188 W and is rated to a junction temperature of 175 °C. It is supplied in the TO-263 package.

At a glance

• Type: MOSFET
• Max drain–source voltage (V_DS): 60 V
• Max continuous drain current (I_D): 120 A
• Power dissipation (P_D): 188 W
• Max junction temperature (T_J): 175 °C
• Package: TO-263

Typical applications

With its 60 V drain–source rating the HY1906B sits in the mid-range class of switching MOSFETs, typically found in 24 V and 48 V industrial and battery systems, motor drives and H-bridges and load and hot-swap switching.

The 120 A current rating puts it in high-current territory, where conduction loss (I² × R_DS(on)) and thermal design usually matter more than switching loss. Budget for adequate copper area and a heatsink.

Gate drive and switching notes

Keep gate–source voltage within the ±25 V maximum; exceeding it punctures the gate oxide and destroys the device permanently.

Switching behaviour is characterised by an output capacitance (C_oss) of 876 pF, which together with the gate drive determines switching loss and the practical upper frequency limit.

Choosing a replacement for the HY1906B

A drop-in substitute for the HY1906B should match its polarity and offer a drain–source rating of at least 60 V and a continuous drain current rating of at least 120 A.

Mechanically, check the replacement against the TO-263 footprint and confirm the pin order — parts sharing a package outline do not always share a pinout.

Where the application switches inductive loads or runs near the voltage limit, keep extra headroom rather than choosing a part that only just meets the original numbers.

Frequently asked questions

What is the HY1906B?

The HY1906B is a MOSFET (metal-oxide-semiconductor field-effect transistor). It is rated for 60 V drain-source and 120 A continuous drain current.

What is the maximum voltage of the HY1906B?

The HY1906B has a maximum drain-source voltage (Vds) of 60 V. Treat this as an absolute maximum and design with margin, especially when switching inductive loads.

How much current can the HY1906B handle?

It is rated for 120 A of continuous drain current, with power dissipation limited to 188 W. Real-world capability depends on your heatsinking and ambient temperature.

What package does the HY1906B come in?

It is listed in TO-263. Verify the pinout of the specific variant, as one outline can carry different pin assignments.

What can I use to replace the HY1906B?

This page lists 17 candidate equivalents matched on electrical ratings and package. Any replacement should meet or exceed the original voltage, current and dissipation figures and use a compatible drive level.