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UL 1557

UL Standard for Safety Electrically Isolated Semiconductor Devices

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Organization: UL
Publication Date: 19 March 2018
Status: active
Page Count: 25
scope:

These requirements apply to semiconductor devices of the isolated-mounting type - thyristors, transistors, diodes, and the like, and hybrid modules consisting of combinations of these devices.

These requirements do not apply to snubber and commutation circuits associated with thyristors, transistors or other analog semiconductor devices.

These requirements cover the isolation performance of thyristors, transistors, diodes, and the like, and their combination in module packages and constructional features that are pertinent to that performance.

These requirements apply to isolated semiconductors for use as components in products. Compliance of an isolated semiconductor with these requirements does not determine that the semiconductor is acceptable for use as a component of an end product without further investigation. The acceptability of a semiconductor in any particular product depends upon its acceptability for continued use under the conditions that prevail in actual service.

Document History

UL 1557
March 19, 2018
UL Standard for Safety Electrically Isolated Semiconductor Devices
These requirements apply to semiconductor devices of the isolated-mounting type – thyristors, transistors, diodes, and the like, and hybrid modules consisting of combinations of these devices. These...
December 29, 2011
UL Standard for Safety Electrically Isolated Semiconductor Devices
These requirements apply to semiconductor devices of the isolated-mounting type – thyristors, transistors, diodes, and the like, and hybrid modules consisting of combinations of these devices. These...
December 29, 2011
UL Standard for Safety Electrically Isolated Semiconductor Devices
These requirements apply to semiconductor devices of the isolated-mounting type – thyristors, transistors, diodes, and the like, and hybrid modules consisting of combinations of these devices. These...
December 29, 2011
UL Standard for Safety Electrically Isolated Semiconductor Devices
These requirements apply to semiconductor devices of the isolated-mounting type – thyristors, transistors, diodes, and the like, and hybrid modules consisting of combinations of these devices. These...
June 14, 2006
UL Standard for Safety Electrically Isolated Semiconductor Devices
These requirements apply to semiconductor devices of the isolated-mounting type – thyristors, transistors, diodes, and the like, and hybrid modules consisting of combinations of these devices. These...
June 14, 2006
UL Standard for Safety Electrically Isolated Semiconductor Devices
A description is not available for this item.
June 14, 2006
UL Standard for Safety Electrically Isolated Semiconductor Devices
A description is not available for this item.
May 29, 1997
UL Standard for Safety Electrically Isolated Semiconductor Devices
A description is not available for this item.
May 29, 1997
UL Standard for Safety Electrically Isolated Semiconductor Devices
A description is not available for this item.
May 29, 1997
UL Standard for Safety Electrically Isolated Semiconductor Devices
A description is not available for this item.
January 1, 1993
UL Standard for Safety Electrically Isolated Semiconductor Devices
A description is not available for this item.

References

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