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:

• 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.

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.

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.

Requirement	Unit	Grades
		1	2	3	4	5	6
Min number of effective differs	Number	100	300	15,000	30,000	30,000	100,000
Min number of movable detainers	Number	2	3	5	5	6	6
Max number of idential	%	100	70	60	60	60	50
Max number of identical adjacent steps	Number	-	2	2	2	2	2
Direct coding on key	-	-	-	No	No	No	No
Operation of security mechanism (interpassing) torque	Nm	1.5	1.5	1.5	1.5	1.5	1.5
Torque resistance of plug/cylinder	Nm	2.5	5	15	15	15	15

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.

Requirement	Unit	Grades
		0	A	B	C	D
Resistance to drilling (net drilling time)	Minutes	-	3 to 5	5 to 10	3 to 5	5 to 10
Resistance to chisel attack (number of defined blows)	Number	-	40	40	30	40
Resistance to twisting attack (number of defined twists)	Number	-	20	30	20	30
Resistance to plug/cylinder extraction (force)	kN	-	-	-	10	15
	minutes	-	-	-	5 to 15	5 to 15
Torque resistance of plug/cylinder (torque)	Nm	-	20	30	20	30

See also

• Security Ratings
• UL 437
• BHMA/ANSI 156.30
• BHMA/ANSI 156.50