This character is a Other Symbol and is commonly used, that is, in no specific script.
The glyph is a square composition of the glyphs Glyph for U+0070Latin Small Letter P, Glyph for U+0057Latin Capital Letter W. Its East Asian Width is wide. In bidirectional text it is written from left to right. When changing direction it is not mirrored. U+33BA offers a line break opportunity at its position, except in some numeric contexts.
The Wikipedia has the following information about this codepoint:
The watt (symbol: W) is the unit of power or radiant flux in the International System of Units (SI), equal to 1 joule per second or 1 kg⋅m2⋅s−3. It is used to quantify the rate of energy transfer. The watt is named in honor of James Watt (1736–1819), an 18th-century Scottish inventor, mechanical engineer, and chemist who improved the Newcomen engine with his own steam engine in 1776. Watt's invention was fundamental for the Industrial Revolution.
Representations
System
Representation (click value to copy)
Nº
13242
UTF-8
E3 8E BA
UTF-16
33 BA
UTF-32
00 00 33 BA
URL-Quoted
%E3%8E%BA
HTML hex reference
㎺
Wrong windows-1252 Mojibake
㎺
Encoding: CP949 (hex bytes)
A7 CE
Encoding: EUC_KR (hex bytes)
A7 CE
Encoding: GB18030 (hex bytes)
81 39 E8 34
Encoding: ISO2022_JP_2 (hex bytes)
1B 24 28 43 27 4E 1B 28 42
Encoding: ISO2022_KR (hex bytes)
1B 24 29 43 0E 27 4E 0F
Encoding: JOHAB (hex bytes)
DC 5E
Adobe Glyph List
pwsquare
RFC 5137
\u'33BA'
Bash and Zsh inside echo -e
\u33BA
C and C++
\u33BA
C#
\u33BA
CSS
\0033BA
Excel
=UNICHAR(13242)
Go
\u33BA
JavaScript
\u33BA
Modern JavaScript since ES6
\u{33ba}
JSON
\u33BA
Java
\u33BA
Lua
\u{33BA}
Matlab
char(13242)
Perl
"\x{33BA}"
PHP
\u{33ba}
PostgreSQL
U&'\33BA'
PowerShell
`u{33BA}
Python
\u33BA
Ruby
\u{33ba}
Rust
\u{33ba}
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