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1. Define the circuit’s operating parameters.
Fill in the following information about the circuit:
Maximum ambient operating temperature
________________
Normal operating current
________________
Maximum operating voltage (RXE is 60 V max.)
________________
Maximum interrupt current
________________
2. Select the PolySwitch RXE device that will accommodate the
circuit’s maximum ambient operating temperature and
nor-
mal operating current.
Look across the top of the table on the next page to find the tempera-
ture that most closely matches the circuit’s maximum ambient operat-
ing temperature. Look down that column to find the value equal to or
greater than the circuit’s normal operating current. Now look to the far
left of that row to find the part number for the RXE device that will best
accommodate the circuit.
The thermal derating curve located on the next page is a normalized
representation of the data in the table located on the same page.
166 RXE Devices
Raychem Circuit Protection Devices
RXE
Radial Leaded
4
RXE(7)
1/15/99 11:44 AM
Page 166
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