This character is a Other Symbol and is commonly used, that is, in no specific script.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. The word that U+23FD forms with similar adjacent characters prevents a line break inside it. The glyph can be confused with one other glyph.
The Wikipedia has the following information about this codepoint:
A power symbol is a symbol indicating that a control activates or deactivates a particular device. Such a control may be a rocker switch, a toggle switch, a push-button, a virtual switch on a display screen, or some other user interface. The internationally standardized symbols are intended to communicate their function in a language-independent manner.
Representations
System
Representation (click value to copy)
Nº
9213
UTF-8
E2 8F BD
UTF-16
23 FD
UTF-32
00 00 23 FD
URL-Quoted
%E2%8F%BD
HTML hex reference
⏽
Wrong windows-1252 Mojibake
â½
Encoding: GB18030 (hex bytes)
81 37 82 37
RFC 5137
\u'23FD'
Bash and Zsh inside echo -e
\u23FD
C and C++
\u23FD
C#
\u23FD
CSS
\0023FD
Excel
=UNICHAR(9213)
Go
\u23FD
JavaScript
\u23FD
Modern JavaScript since ES6
\u{23fd}
JSON
\u23FD
Java
\u23FD
Lua
\u{23FD}
Matlab
char(9213)
Perl
"\x{23FD}"
PHP
\u{23fd}
PostgreSQL
U&'\23FD'
PowerShell
`u{23FD}
Python
\u23FD
Ruby
\u{23fd}
Rust
\u{23fd}
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