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SPDP20D28-1 Datasheet(PDF) 10 Page - Sensitron |
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SPDP20D28-1 Datasheet(HTML) 10 Page - Sensitron |
10 / 14 page SENSITRON SEMICONDUCTOR TECHNICAL DATA DATASHEET 5186, Rev - ©2010 Sensitron Semiconductor • 221 West Industry Court • Deer Park, NY 11729-4681 Phone (631) 586 7600 Fax (631) 242 9798 • www.sensitron.com • sales@sensitron.com • Page 10 SPDPXXD28-1 SERIES MIL-W-5088L has various figures showing derating for harnesses as a function of the number of current carrying conductors for different altitudes. MIL-W-5088L only specifies wire for DC or RMS AC conditions, not for transient or overload conditions. MIL-W-5088L and its amendment should be consulted to determine minimum wire sizes for other currents and conditions. For transient or overload conditions, the transient or overload happens so quickly that heat is not transferred from the wire to the surroundings. The heat caused by the I 2R heating of the wire causes the temperature to rise at a linear rate controlled by the heat capacity of the wire. The equation for this linear rise in temperature, with respect to time, can be solved as: I 2t = constant. Every wire has an I2t rating that’s dependent on the temperature rise allowed and the diameter of the wire. If the I 2t rating of the SSPC or circuit breaker is less than the I 2t rating of the wire, then the SSPC or circuit breaker can protect the wire. The maximum I2t rating for the SPDP25D28-1 is 7.45 x 10 3 Amp2-Seconds. Every wire size in the paragraphs above has an I2t rating that exceeds the SPDP25D28-1 I 2t rating for the temperature rises stated. Therefore, to select a wire size, it’s simply a matter of determining the maximum temperature rise of the application and deciding whether or not the wire will be in a bundle and use the information above. Similarly, the I 2t ratings for the SPDP12D28-1 and SPDP05D28-1 are 1.72 x 10 3 Amp2-Seconds and 300 Amp2-Seconds, respectively. Application Connections The SPDPXXD28-1 Series may be configured as a high-side or low-side switch and may be used in positive or negative supply applications. Figure 6 – High-Side Switch, Positive Supply Figure 6 shows the connections as a high-side switch with a positive power supply. |
Similar Part No. - SPDP20D28-1 |
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Similar Description - SPDP20D28-1 |
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