Differences Between Module A and Module B – CE Conformity Assessment

Differences Between Module A and Module B in CE Conformity Assessment Processes

The CE marking is a fundamental conformity mark required for a product to circulate freely within the European Economic Area (EEA). Depending on the nature of the product, manufacturers are obliged to complete specific processes under conformity assessment modules. Among these, two of the most commonly used are Module A (Internal Production Control) and Module B (EU-Type Examination).

In this article, we explain in simple terms what Module A and Module B mean, their main differences, and when each should be used.

Module A – Internal Production Control

Module A is the simplest conformity assessment procedure. It is a process where the manufacturer checks the compliance of their product with the relevant legislation using their own technical means. There is no need to obtain services from any notified body.

Key Features:

• The manufacturer prepares their own technical documentation.

• Risk analysis and necessary tests are performed by the manufacturer.

• The CE marking is affixed by the manufacturer.

• An EU Declaration of Conformity is prepared.

When is it used?

• For low-risk products (e.g., some household electrical appliances).

• When the relevant directive allows the use of Module A alone.

Module B – EU-Type Examination

Module B is a procedure used for higher-risk product categories. In this module, a sample of the product is tested by a notified body, and the technical documentation is reviewed before issuing a "Type Examination Certificate".

Key Features:

• The manufacturer submits a prototype of the product to the notified body.

• The notified body evaluates the product according to the applicable directive.

• A type examination report and certificate are issued.

• The CE marking may be affixed in conjunction with Module C or other complementary modules.

When is it used?

• Personal protective equipment (e.g., parachutes, gas masks)

• Equipment used in explosive atmospheres (ATEX products)

• High-risk products such as medical devices

Comparative Summary