Short answer. No, not automatically. When a specified article is sold under its patent or other trade name, there is no warranty as to its fitness for any particular purpose, unless there is a stipulation to the contrary — buying a named, branded product does not by itself create a fitness warranty.
What the law says
In the case of contract of sale of a specified article under its patent or other trade name, there is no warranty as to its fitness for any particular purpose, unless there is a stipulation to the contrary.
Civil Code, Article 1563 — Sale Under a Trade Name. Read the full provision →
Buying by trade name does not import a fitness warranty
The statute addresses exactly your situation: where a specified article is sold under its patent or other trade name, the law states there is no warranty as to its fitness for any particular purpose. Ordering equipment by its brand name is treated differently from asking a seller to supply something suited to a described need — naming the specific product is what triggers this rule.
The reasoning behind this rule
When you buy something by its specific trade name, you are understood to be relying on your own judgment about that named product, rather than on the seller's assessment of whether it will suit your particular purpose. The law treats this as different from a case where a buyer describes a need and leaves it to the seller to supply something fit for it — asking by name signals that you already know what you are getting, for better or worse.
A stipulation to the contrary changes the outcome
The rule is not absolute — it applies unless there is a stipulation to the contrary. If the seller expressly represented or agreed that the specifically named product would be fit for your particular purpose, and that assurance became part of your agreement, this default rule of no warranty would not apply, and the fitness warranty you actually bargained for would control instead.
What this means for your purchase
If you simply asked for the equipment by its brand name without the seller stipulating that it would suit your specific use, this article means the seller generally did not warrant fitness for that purpose merely by selling you the named product. Whether any such stipulation existed in your case depends on what was actually discussed or agreed between you and the seller at the time of the sale, which is a factual question this article does not itself resolve. This rule does not touch other warranties that may still apply on separate grounds, such as the warranty against hidden defects, which operates independently of whether the item was ordered by trade name.