I have this Descriptions

what i want to return is :

For that i tried this regex

(\s|^)(-)?(\d+\.?\d*(A|mA)(DC|AC)?)(?=\s|$)

but could not get work with values contained by a / as 700/600mA , 8.6/7.3A , 200/200mA

How could i correct my regex

>Solution :

You can use

(?<!\S)-?\d+(?:\.\d+)?(?:/-?\d+(?:\.\d+)?)?m?A(?:[DA]C)?(?!\S)

Explanation

• (?<!\S) Assert a whitespace boundary to the left
• -?\d+(?:\.\d+)? Match 1+ digits with an optional decimal part
• (?:/-?\d+(?:\.\d+)?)? Optionally match / and 1+ digits with an optional decimal part
• m?A Match an optional m followed by A
• (?:[DA]C)? Match optional DA or AC
• (?!\S) Assert a whitespace boundary to the right

Regex demo

If you meant to match m mA DC AC the optional group should be part of the alternation:

 (?<!\S)-?\d+(?:\.\d+)?(?:/-?\d+(?:\.\d+)?)?(?:m?A|[DA]C)(?!\S)

Regex demo