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. 760-6021
Mfr. Part No.FSFR1800HS
€3.04
Each
units
- Integrated 0.95Ω - 25 V 7A 2 - 260W - Through Hole SIP 10 +130 °C
RS Stock No. 146-5697
Mfr. Part No.TOP256EN
€1.771
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. 166-0819
Mfr. Part No.BTS621L1E3128ABUMA1
BrandInfineon
€2.322
Each (On a Reel of 1000)
units
High Side High Side Power Switch 200mΩ - 43 V 8.5A 2 - - - Surface Mount TO-263 7 +150 °C
RS Stock No. 110-7772
Mfr. Part No.BTS621L1E3128ABUMA1
BrandInfineon
€4.483
Each (In a Pack of 4)
units
High Side High Side Power Switch 200mΩ - 43 V 8.5A 2 - - - Surface Mount TO-263 7 +150 °C
RS Stock No. 662-2394
Mfr. Part No.TPS2105DBVT
€0.852
Each (In a Pack of 5)
units
- - - - 5.5 V 500mA 1 2 - - Surface Mount SOT-23 5 +85 °C
RS Stock No. 162-7144
Mfr. Part No.TPS2105DBVT
€0.838
Each (On a Reel of 250)
units
- - - - 5.5 V 500mA 1 2 - - Surface Mount SOT-23 5 +85 °C
RS Stock No. 146-2432
Mfr. Part No.SEN013DG
€0.662
Each (In a Tube of 100)
units
- High Voltage Control Signal - 3 - - - - - - Surface Mount SOIC 8 +125 °C
RS Stock No. 123-5539
Mfr. Part No.SEN013DG
€0.908
Each (In a Pack of 10)
units
- High Voltage Control Signal - 3 - - - - - - Surface Mount SOIC 8 +125 °C
RS Stock No. 145-5326
Mfr. Part No.FSFR1800HSL
Brandonsemi
€1.148
Each (In a Tube of 19)
units
- Integrated 0.95Ω - 25 V 7A 2 - 260W - Through Hole SIP 10 +130 °C
RS Stock No. 825-9203
Mfr. Part No.BTS3046SDRATMA1
BrandInfineon
€0.78
Each (In a Pack of 10)
units
Low Side Low Side Switch 50mΩ - 60 V 3.6A 1 - - - Surface Mount TO-252 3 +150 °C
RS Stock No. 165-6889
Mfr. Part No.BTS3046SDRATMA1
BrandInfineon
€0.762
Each (On a Reel of 2500)
units
Low Side Low Side Switch 50mΩ - 60 V 3.6A 1 - - - Surface Mount TO-252 3 +150 °C
RS Stock No. 760-6024
Mfr. Part No.FSFR1800HSL
€1.22
Each
units
- Integrated 0.95Ω - 25 V 7A 2 - 260W - Through Hole SIP 10 +130 °C
RS Stock No. 146-5630
Mfr. Part No.LNK364PN
€0.815
Each (In a Tube of 50)
units
- Off Lineer 45Ω - - 750mA 1 - 6W Short Circuit Through Hole DIPB 8 +150 °C
RS Stock No. 168-8692
Mfr. Part No.ISO8200B
€6.611
Each (In a Tube of 31)
units
High Side Smart Power SSR 0.24Ω - 36 V 0.7A 8 - - - Surface Mount PowerSO 36 +125 °C
RS Stock No. 168-6836
Mfr. Part No.VN808CM-E
€5.29
Each (In a Tube of 31)
units
- - - - 45 V 700mA 8 8 - - Surface Mount PowerSO 36 +125 °C
RS Stock No. 170-2277
Mfr. Part No.BTS442E2BKSA1
BrandInfineon
€5.56
Each (In a Tube of 50)
units
High Side High Side Switch 18mΩ - 42 V 21A 1 - 167W - Through Hole TO-220-5 5 + Tab +150 °C
RS Stock No. 919-6692
Mfr. Part No.ITS4141NHUMA1
BrandInfineon
€0.986
Each (On a Reel of 4000)
units
High Side High Side Switch 320mΩ - 48 V 0.7A 1 - - - Surface Mount SOT-223 3 + Tab +85 °C
RS Stock No. 714-1177
Mfr. Part No.VN808CM-E
€6.14
Each
units
- - - - 45 V 700mA 8 8 - - Surface Mount PowerSO 36 +125 °C
RS Stock No. 858-0728
Mfr. Part No.LTC1153IS8#PBF
€5.305
Each (In a Pack of 2)
units
- - - - 18 V 2A 1 1 - - Surface Mount SOIC 8 -
RS Stock No. 919-8755
Mfr. Part No.BTS4141NHUMA1
BrandInfineon
€1.093
Each (On a Reel of 4000)
units
High Side High Side Switch 320mΩ - 45 V 0.7A 1 - - - Surface Mount SOT-223 3 + Tab +125 °C