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What is the replacement module for an TVS4IMA48B surge protective device

Issue:
Question:
What is the replacement phase modules for the TVS4IMA48B SPD?

Product Line:
Surge Protective Device (SPD)

Environment:
Maintenance/Replacement

Cause:
Need to replace the phase modules on a surge protection device.

Resolution:
Use two per phase MA4IMA24 and replace both modules, even if only one module has Red LED's 
 
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