PHILIPS BUK125-50L Data Sheet
Summary
Product specification for the Philips BUK125-50L Logic Level TOPFET2 power MOSFET in SOT263B-01 5-pin surface mounting plastic package (TO-220 version of BUK136-50L). TrenchMOS output stage with 20 mOhm on-state resistance, 50V drain-source, 40A continuous drain current, 107W power dissipation max. Features separate input pin for higher frequency drive, separate supply pin (5V nominal) for logic and protection circuits, overtemperature protection, drain current limiting, latched overload trip st
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Philips Semiconductors Product specification
Logic level TOPFET BUK125-50L TO-220 version of BUK136-50L
DESCRIPTION QUICK REFERENCE DATA Monolithic logic level protected SYMBOL PARAMETER MAX. UNIT power MOSFET using TOPFET2
technology assembled in a 5 pin VDS Continuous drain source voltage
surface mounting plastic package. ID Continuous drain current
Ptot Total power dissipation
APPLICATIONS Tj Continuous junction temperature ˚C
RDS(ON) Drain-source on-state resistance mΩ
General purpose switch for automotive systems and other SYMBOL PARAMETER NOM. UNIT applications.
VPS Protection supply voltage
FEATURES FUNCTIONAL BLOCK DIAGRAM Trench MOS output stage with low on-state resistance PROTECTION SUPPLY DRAIN Separate input pin for higher frequency drive 5 V logic compatible input
Separate supply pin for logic
OC LOAD O/V
and protection circuits with low
DETECT CLAMP
operating current
POWER
Overtemperature protection
INPUT
Drain current limiting RIG MOSFET
Short circuit load protection Latched overload trip state reset by the protection pin
LOGIC AND
Diagnostic flag pin indicates
protection supply connected, PROTECTION
overtemperature condition,overload tripped state, or open circuit load (detected in the off-state) ESD protection on all pins
Overvoltage clamping SOURCE
Fig.1. Elements of the TOPFET.
PINNING - SOT263B-01 PIN CONFIGURATION SYMBOL PIN DESCRIPTION
mb mb
Input
TOPFET
Drain Protection supply
Source MBL267Front view
Fig. 2. Fig. 3.
tab Drain
January 2003 Rev 1.010
Page Summary Contents For PHILIPS BUK125-50L Data Sheet
Manual Details
| Brand | Philips |
|---|---|
| Pages | 7 |
| File Size | 34.61 KB |
| Published | June 17, 2026 |
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Frequently Asked Questions
What is the maximum continuous drain current rating?
The device has a continuous drain current (ID) of up to 40 A.
How does the TOPFET unit protect against overvoltages?
It actively turns on at a drain-source voltage above 50 V via overvoltage clamping.
What protection is provided during circuit shortages?
The MOSFET includes dedicated short circuit load protection.
What limits must be considered for handling the device?
Its Electrostatic Discharge (ESD) limiting value is -2 kV.