This site uses cookies to deliver our services and provide a basic level of website functionality. The four different types of cookies are: Strictly Necessary cookies, Functionality cookies, Performance cookies and Advertising cookies. By checking the box and clicking the button below, you are informing Rapid Electronics Ltd that you agree to the use of these cookies as detailed in our Privacy Policy.

Industry Schools FE/HE Site: Industry Site: Schools Site: FE/HE Site: Mobile
+44 (0)1206 751166

Kudom KSI240 Series Solid State Relays Single Phase AC Output Panel Mount

<p>The KSI240 series are a range of high power handling Solid State Relays (SSR) that feature Triac or SCR outputs for heavy industrial loads. The relays have DC control and are available in a choice of load currents. Suitable for applications such as high/low temperature chambers, plastics machinery, incubators, lubrication equipment, HVAC, elevators, high power lighting systems, fountain controllers, etc.</p>
  • Panel mounting
  • LED indication for operation
  • Superior thermal performance
  • High dielectric strength
Order code60-157860-157960-1582
Load voltage nom.240V AC240V AC240V AC
Load voltage range48 to 280V AC48 to 280V AC48 to 280V AC
Load current10A25A60A
Switch modeZero crossZero crossZero cross
Control voltage range4 to 32V DC4 to 32V DC4 to 32V DC
Transient overvoltage600V pk600V pk600V pk
Surge current max.400A600A860A
Turn-on time max.½ AC cycle + 1ms½ AC cycle + 1ms½ AC cycle + 1ms
Turn-off time max.½ AC cycle + 1ms½ AC cycle + 1ms½ AC cycle + 1ms

Turn-on voltage min.4V DC
Turn-off voltage min.1V DC
Input current max.25mA
Dielectric strength=5kV rms
Dimensions58.4 x 45.7 x 22.9mm
Operating temperature-30°C to +80°C


20 March 2019 Question by: Ian Benton
Q. How much DC input current is required to switch the device ON? WHat is the relationship between the DC input current and the DC input voltage?
A. Hi Ian, thank you for your question. The technical details are as follows: Turn-on voltage min: 4V DC; turn-off voltage min: 1V DC; input current max: 25mA. The full data sheet can be found here.