I don't know what you mean by Thai Buddhist pendants. Kechara has a range of pendants http://vajrasecrets.com/pendants.html
which will bring Buddha's blessings to the wearer, and protection also. All the Buddhas are the same enlightened energy though some Buddhas 'specialise' in particular aspects, eg Dukkar is good for legal cases and negative spirits, Medicine Buddha and White Tara for healing and health, Manjushri for wisdom etc.
I personally like and wear the Bliss Queen - one of the highest female tantric Buddhas, Vajrayogini. This one is the one i wear everyday http://vajrasecrets.com/vajrayogini-emptiness-rectangular-pendant-surrounded-by-clear-cubic-zirconia.html
. I like Vajrayogini because she can bring me to Enlightenment and by wearing her pendant everyday, i constantly remind myself that i wish to receive her practice and achieve Enlightenment through her practice.
I also like Setrap very much so I wear his pendant now and then.
Which do you like?