Power Switch ICs

Power switch ICs (integrated circuits) are electronic components that control the power for another device within the circuit. They are used to enable or disable a power rail. Power switches are often used to control the current to a USB connector to prevent short-circuiting. These switches provide protection for circuits which may experience overload or high operating temperatures. Load switches are active whenever the power is switched on and therefore offer low leakage currents. Load switches are often used instead of a MOSFET as they offer additional protection from a smaller package.

When choosing a power switch it is important to consider the current limit levels. These levels can be fixed or adjustable depending on the device. Power switch ICs come in a standard semiconductor package, such as a SOT-21, SSOP and PDIP.

Where are they used?

  • USB ports (e.g. USB-C)
  • Desktop computers
  • Docking stations
  • General switching or linear applications

High-side and Low-side Switches

High-side switches sit between the positive power line and the load. Low-side switches sit between the load and the ground. High-side switches are more commonly used in heavy-load applications where a short circuit is more likely at the ground. Low-side switches are often cheaper and ideal for when load is controlled through a high-speed PWM. There are also H-bridge switch ICs which require both high-side and low-side switches.

What is an Intelligent Power Switch (IPS)?

Intelligent power switches are ICs that are largely used in the automotive applications. They also play a big role in the “Smart Home” products. An Intelligent power switch combines multiple actions into a single process. They are used in PAC (Programmable Automation Controller), CNC (Computer Numerical Control) & PLC (Programmable Logic Controller), robotics, agricultural systems, security systems & used in green energy, like wind turbines.


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Description Price Power Switch Topology Power Switch Type Switch On Resistance Number of Channels Maximum Operating Supply Voltage Maximum Operating Current Number of Outputs Number of Inputs Power Rating Protection Features Mounting Type Package Type Pin Count Maximum Operating Temperature
RS Stock No. 146-5721
Mfr. Part No.TOP258PN
$3.25
Each (In a Tube of 50)
units
- Off Lineer 2.9Ω - - 6.88A 1 - 50W Over-Temperature Through Hole DIPC 8 +150 °C
RS Stock No. 919-6674
Mfr. Part No.BTS6143DAUMA1
BrandInfineon
$1.947
Each (On a Reel of 2500)
units
High Side High Side Switch 24mΩ - 38 V 41A 2 - - - Surface Mount TO-252 5 +150 °C
RS Stock No. 753-2905
Mfr. Part No.BTS6143DAUMA1
BrandInfineon
$4.71
Each
units
High Side High Side Switch 24mΩ - 38 V 41A 1 - - - Surface Mount TO-252 5 +150 °C
RS Stock No. 146-8588
Mfr. Part No.TNY274PN
$2.10
Each
units
- Off Lineer 48Ω - - 750mA 1 - 8.5W Over-Temperature Through Hole DIPC 8 +150 °C
RS Stock No. 146-5632
Mfr. Part No.TNY274PN
$1.398
Each (In a Tube of 50)
units
- Off Lineer 48Ω - - 750mA 1 - 8.5W Over-Temperature Through Hole DIPC 8 +150 °C
RS Stock No. 146-8635
Mfr. Part No.TOP256EN
$3.03
Each
units
- Off Lineer 4.75Ω - - 4.08A 1 - 86W Over-Temperature Surface Mount ESIPC 7 +150 °C
RS Stock No. 146-5697
Mfr. Part No.TOP256EN
$2.58
Each (In a Tube of 48)
units
- Off Lineer 4.75Ω - - 4.08A 1 - 86W Over-Temperature Surface Mount ESIPC 7 +150 °C
RS Stock No. 146-5635
Mfr. Part No.TNY274GN
$1.308
Each (In a Tube of 50)
units
- Off Lineer 48Ω - - 750mA 1 - 8.5W Over-Temperature Surface Mount SMDC 8 +150 °C
RS Stock No. 533-890
Mfr. Part No.TNY274GN
$1.456
Each (In a Pack of 5)
units
- Off Line Switcher - - - - - - 11W - Surface Mount PDIP SMD 7 +150 °C
RS Stock No. 146-8608
Mfr. Part No.TNY274GN
$2.52
Each
units
- Off Lineer 48Ω - - 750mA 1 - 8.5W Over-Temperature Surface Mount SMDC 8 +150 °C
RS Stock No. 919-6611
Mfr. Part No.BTS500551TMAATMA1
BrandInfineon
$4.477
Each (On a Reel of 1000)
units
High Side High Side Switch 17mΩ - 34 V 70A 1 - - - Surface Mount TO-220 7 +150 °C
RS Stock No. 752-8261
Mfr. Part No.BTS500551TMAATMA1
BrandInfineon
$9.51
Each
units
High Side High Side Switch 17mΩ - 34 V 70A 1 - - - Surface Mount TO-220 7 +150 °C
RS Stock No. 145-4321
Mfr. Part No.KA5L0380RYDTU
$1.512
Each (In a Tube of 50)
units
- Off Lineer 4.6Ω - 30 V 2.41A 1 - 75W - Through Hole TO-220F 4 +85 °C
RS Stock No. 146-8577
Mfr. Part No.LNK364PN
$2.15
Each
units
- Off Lineer 45Ω - - 750mA 1 - 6W Short Circuit Through Hole DIPB 8 +150 °C
RS Stock No. 146-5630
Mfr. Part No.LNK364PN
$1.335
Each (In a Tube of 50)
units
- Off Lineer 45Ω - - 750mA 1 - 6W Short Circuit Through Hole DIPB 8 +150 °C
RS Stock No. 146-5679
Mfr. Part No.TNY279PN
$2.717
Each (In a Tube of 50)
units
- Off Lineer 6.7Ω - - 2250mA 1 - 25W Over-Temperature Through Hole DIPC 8 +150 °C
RS Stock No. 146-8618
Mfr. Part No.TNY279PN
$3.34
Each
units
- Off Lineer 6.7Ω - - 2250mA 1 - 25W Over-Temperature Through Hole DIPC 8 +150 °C
RS Stock No. 146-5631
Mfr. Part No.LNK364GN
$1.712
Each (In a Tube of 50)
units
- Off Lineer 45Ω - - 750mA 1 - 6W Short Circuit Surface Mount SMDB 8 +150 °C
RS Stock No. 146-8581
Mfr. Part No.LNK364GN
$1.99
Each
units
- Off Lineer 45Ω - - 750mA 1 - 6W Short Circuit Surface Mount SMDB 8 +150 °C
RS Stock No. 146-5693
Mfr. Part No.TNY280PN
$2.54
Each (In a Tube of 50)
units
- Off Lineer 4.5Ω - - 2550mA 1 - 28.5W Over-Temperature Through Hole DIPC 8 +150 °C