240DI10 OPTO 22, 240DI10 Datasheet - Page 15
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240DI10
Manufacturer Part Number
240DI10
Description
SSR, PANEL MOUNT, 280VAC, 32VDC, 10A
Manufacturer
OPTO 22
Specifications of 240DI10
Control Voltage Range
3VDC To 32VDC
Operating Voltage Range
24VAC To 280VAC
Load Current
10A
Isolation Voltage
4000Vrms
Control Voltage Type
DC
Relay Terminals
Screw
Peak Surge Current
110A
Brand/series
DC Series
Current, Rating
10 A
Function
Power
Mounting Type
PCB
Relay Type
Solid State
Standards
CSA, CE
Voltage, Control
240 VAC
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Applications: Tips
Heat Sink Calculation
Like all semiconductor devices, SSR current ratings must be based on maximum internal junction temperature. All Opto 22 SSRs
operate conservatively at maximum internal junction temperatures of 110 °C. Use the equation below to calculate the maximum
allowable heat sink thermal resistance for your application. It is good engineering practice to provide a margin for error instead of
running the application right at the limits. If your application is near the thermal limit, it can be helpful to add a fan to move air
across the heat sink.
IMPORTANT: Thermally conductive grease must be used between the relay base and the heat sink.
Sample Calculation 1
120-volt, 20-amp load; 50 °C ambient air temperature
Model: 120D25 SSR.
See the last two columns of the table on
the bottom of the table.
Dissipation: 1.3 watts/amp
Thermal resistance: 1.2 °C/watt
Maximum junction temperature: 110 °C
The calculation would be as follows:
© 2006–2011 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered trademarks of their respective companies or organizations.
Solid-State Relays
800-321-6786 • 951-695-3000 • FAX 951-695-3095 • sales@opto22.com •
page 4
for thermal resistance and dissipation values for the 120D25. Also, see the note at
Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • www.opto22.com
This calculation indicates that you
should select a heat sink with a thermal
resistance of less than 1.1 °C/watt.
800-835-6786 • 951-695-3080 • FAX 951-695-3017 • support@opto22.com
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