EN 1303

=EN 1303=

EN 1303 is a security rating. In Europe, the European Committee for Standardization (Comite European de Normalisation) (CEN) provides rating and testing systems for security devices.

Code Number
An 8-digit code is used to state the level of compliance. Each digit corresponds to a category and how the lock cylinder responded to testing.

Digit 1 - Category of use
One category is identified:
 * Grade 1: Keys shall resist a torque of 2.5Nm and still be usable. This is for use by people with a high incentive to exercise care and with a small chance of misuse.

Digit 2 – Durability
Three grades of durability classify cylinders as either grade 4, 5, or 6 based on the number of test cycles achieved.
 * Grade 4: 25,000 cycles.
 * Grade 5: 50,000 cycles.
 * Grade 6: 100,000 cycles.

Digit 3 – Door mass

 * Grade 0 - No requirement.

Digit 4 – Fire resistance
Cylinders are classified as either grade 0, A or B.
 * Grade 0: Not approved for use on fire/smoke door assemblies.
 * Grade A: Cylinders shall be subjected to a smoke test in accordance with EN 1634-3 or materials for the parts of the cylinder responsible for preventing any leakage of smoke shall have a melting point not less than 840 °C.
 * Grade B: Cylinders shall be fire tested in accordance with current fire test requirements of EN 1634-1 or EN 1634-2 or materials for the parts of the cylinder responsible for preventing the spread of fire shall have a melting point not less than 300 °C.

Digit 5 – Safety

 * Grade 0 - No requirement.

Digit 6 – Corrosion and temperature resistance
Cylinders are classified as either grade 0, A, B or C: Note: No distinction is made between the inside and the outside of either the cylinder and/or the door. On completion of the test, the cylinder must operate using a maximum 1.5 Nm torque on the key at both - 25 °C and + 65 °C.
 * Grade 0: No corrosion or temperature requirement.
 * Grade A: High corrosion resistance, no temperature requirement.
 * Grade B: No corrosion requirement, temperature requirement between - 25 °C and + 65 °C.
 * Grade C: high corrosion resistance, temperature requirement between - 25 °C and + 65 °C.

Digit 7 – Key Security
Cylinders are classified in grades 1 to 6, where 6 is the highest. The grade of security can differ from one side of a double cylinder to the other. The table below provides a summary of the main security requirements.

Digit 8 – Attack resistance
Cylinders are classified grades 0 to D where D is the highest. The table below provides a summary of the main requirements.