MP240D2 OPTO 22, MP240D2 Datasheet - Page 15

• Manufacturer Part Number: MP240D2
• Description: SSR, PCB MOUNT, 280VAC, 24VDC, 2A
• Manufacturer: OPTO 22

Specifications of MP240D2

• Control Voltage Type: DC
• Input Voltage: 3VDC To 24VDC
• Load Current: 2A
• Load Voltage Range: 24VAC To 280VAC
• Switching Mode: Zero Cross
• Relay Terminals: Through Hole
• Load Voltage Max: 280VAC
• Brand/series: MP Series
• Capacitance: 8 pF (Max.) Coupling (Input-Output)
• Current, Rating: 2 A
• Current, Surge, Non-repetitive Peak: 20 Apeak @ 1 Cycle
• Dimensions: 1.70 in. L x 0.40 in. W x 0.98 in. D
• Function: Power
• Mounting Type: PCB
• Relay Type: Solid State
• Standards: UL, CSA, CE
• Timer Type: Off Delay
• Voltage, Control: 240 VAC
• Control Voltage Max: 32V
• Rohs Compliant: Yes
• 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 [phone] • [e-mail] •
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 [phone] • [e-mail]
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