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DIN standards

DIN EN 1303

specifies requirements and test methods for locking cylinders and locks. Properties tested include strength, closure security, durability and corrosion resistance. The properties present for the locking cylinders are expressed by an eight-digit classification key. In detail, the following properties are hidden behind the eight digits:

1. point: use class (1 class possible)

Cl. requirements according to DIN EN 1303 / 2005
1 For users with high motivation for care and with low probability of misuse. The locking cylinder must be able to be operated at temperatures from -20°C to +80°C and a torque of 1.5 Nm. The wrench must withstand a torque of 2.5 Nm.

2. point: durability (3 classes possible)

A locking cylinder with a new original key must provide a certain number of locking cycles.

Cl. closing cycles
4 25.000 cycles
5 50.000 cycles
6 100.000 cycles

3. point: door dimensions (no classification)

no requirements for locking cylinders

4. point: fire resistance (2 classes possible)

Currently, the test criteria according to DIN EN 1634-1 apply, according to which the fire-retardant effect of the door must not be impaired by the locking cylinder.

Cl. requirements
0 no requirements
1 requirements according to DIN EN 1634-1 or DIN EN 1634-2

5. point: operational safety (1 class possible)

no requirements for locking cylinders

6. point: corrosion resistance and temperature (4 classes possible)

Locking cylinders must meet the requirements of class 3 according to DIN EN 1670.

Cl. requirements DIN EN 1670 class 3
0 no requirements
A high corrosion resistance, no temperature resistance
B no corrosion requirement, temperature requirement from -20°C to +80°C
C high corrosion resistance, temperature requirement from -20°C to +80°C

7. point: closure safety (6 classes possible)

  • D min. no = minimum number of effective dissimilarities
  • T min. no = minimum number of movable tumblers
  • ED. steps max. no = equal depth steps maximum number
  • ED. steps eo. = equal depth steps next to each other
Cl. D min. no. T min. no. ED. steps max. no. ED. steps eo.
1 100 2 100 % -
2 300 3 70 % 2
3 15.000 5 60 % 2
4 30.000 5 60 % 2
5 30.000 6 60 % 2
6 100.000 6 50 % 2

8. point: attack resistance (3 classes possible)

  • AD in min = drilling time in minutes
  • GD-ZK in kN = total duration against tensile force in kN
  • ZK in kN = tractive force in kN
Cl. AD in min GD-ZK in kN ZK in kN
0 - - -
1 3 5 15
2 5 10 15

DIN 18257

standard for protective fittings and protective rosettes
building hardware-protective hardware-terms, dimensions, requirements and marking

  • ES0 or 1 = low burglar resistance
  • ES1 or 2 = moderate burglary resistance
  • ES2 or 3 = strong burglar resistance
  • ES3 or 4 = extreme burglar resistance

DIN 1154

This standard specifies the requirements for corresponding door closing devices and makes an important contribution to ensuring that a door closes reliably and in a controlled manner.

Many door closers and automatic door operators are adjustable. These are then provided with specifications such as EN 2 - 6.

closing force door leaf width maximum door weight up to
EN 1 750 mm 20 kg
EN 2 850 mm 40 kg
EN 3 950 mm 60 kg
EN 4 1100 mm 80 kg
EN 5 1250 mm 100 kg
EN 6 1400 mm 120 kg
EN 7 1600 mm 160 kg

DIN EN 12209

building hardware - locks and latches - mechanically operated locks and strike plates - requirements and test methods


This standard specifies requirements and test methods for the continuous functionality, strength, protective effect and mode of operation of mechanically operated locks and their striking plates.

1. point: usage category

Cl. meaning
1 for use by persons with a great incentive to take care, low probability of misuse, e.g. residential area
2 for use by persons with great incentive to take care, certain probability of misuse, e.g. office doors
3 for use by public with little incentive to care, high likelihood of misuse, e.g., public buildings

2. point: continuous functional capability

Cl. Closing cycles
A 50.000 test cycles, no load on the trap
B 100.000 test cycles, no load on the trap
C 200.000 test cycles, no load on the trap
F 50.000 test cycles, load on the latch 10 N
G 100.000 test cycles, load on the latch 10 N
H 200.000 test cycles, load on the latch 10 N
L 100.000 test cycles, load on the latch 25 N
M 200.000 test cycles, load on the latch 25 N
R 100.000 test cycles, load on the latch 50 N
S 200.000 test cycles, load on the latch 50 N
W 100.000 test cycles, load on the latch 120 N
X 200.000 test cycles, load on the latch 120 N

3. point: door mass and closing force

Cl. meaning
1 door mass up to 100 kg, maximum 50 N closing force
2 door mass up to 200 kg, maximum 50 N closing force
3 door mass over 200 kg or specified by the manufacturer, maximum closing force 50 N
4 door mass up to 100 kg, maximum 25 N closing force
5 door mass up to 200 kg, maximum 25 N closing force
6 door mass over 200 kg or specified by the manufacturer, maximum closing force 25 N
7 door mass up to 100 kg, maximum 15 N closing force
8 door mass up to 200 kg, maximum 15 N closing force
9 door mass over 200 kg or specified by the manufacturer, maximum closing force 15 N

4. point: suitability for use on fire and smoke doors (class 0 and class 1)

Cl. meaning
0 not approved for use on fire/smoke doors
1 Suitable for use, subject to satisfactory evaluation of the contribution of the lock to fire resistance. This assessment is outside the scope of this standard.

5. point: safety

Cl. meaning
0 no safety requirements

6. point: corrosion resistance and temperature

Cl. meaning
0 no defined corrosion resistance, no temperature requirement
A low corrosion resistance, no temperature requirement
B medium corrosion resistance, no temperature requirement
C high corrosion resistance, no temperature requirement
D very high corrosion resistance, no temperature requirement
E medium corrosion resistance, temperature requirement -20 °C to +80 °C
F high corrosion resistance, temperature requirement -20 °C to +80 °C
G very high corrosion resistance, temperature requirement -20 °C to +80 °C

7. point: protective effect and tapping resistance

Cl. meaning
1 minimum protection effect and no tapping resistance
2 low protective effect and no tapping resistance
3 medium protection and no tapping resistance
4 high protection and no tapping resistance
5 high protection with tapping resistance
6 very high protection and no tapping resistance
7 very high protection with tapping resistance

8. point: door-related area of use

Cl. meaning
A mortise lock, unrestricted use (swing and sliding door)
B mortise lock, swing door
C mortise lock, sliding door
D box lock, unrestricted use (swing and sliding door)
E box lock, swing door
F box lock, sliding door
H mortise lock, swing door, forend supported
J box lock, unrestricted use (swing and sliding door)
K mortise lock, swing door, output monitoring by key
L mortise lock, sliding door, output monitoring by key
M box lock, swing door, exit monitoring by key
N box lock, sliding door, exit monitoring by key
P mortise lock, swing door, forend supported, output monitoring by key
R box lock, swing door (inward opening only), exit monitoring by key
S mortise lock, unrestricted use swing and sliding door, exit monitoring by key
T box lock, unrestricted use (swing and sliding door), exit monitoring by key

9. point: type of key operation and interlocking

Cl. meaning
0 not applicable
A cylinder lock, manual lock
B cylinder lock, automatic locking
C cylinder lock, manual locking with intermediate locking device
D locking lock, manual locking
E locking lock, automatic locking
F tumbler lock, manual locking with intermediate lock
G lock without key operation, manual locking
H lock without key operation, automatic lock

10. point: type of spindle actuation

Cl. meaning
0 lock without nut
1 lock for knob operation or lever handle with hold-up spring
2 lock for operating a door handle without hold-up spring
3 lock for operation of a lever handle with high stress and strong hold-up spring
4 lock for actuation of a lever handle with high stress and strong hold-up spring specified by the manufacturer

11. point: key identifier requirement

Cl. meaning
0 no requirement
A at least 3 tumblers
B at least 5 tumblers
C at least 5 tumblers, extended number of effective closing differences
D at least 6 tumblers
E at least 6 tumblers, extended number of effective closing differences
F at least 7 tumblers
G at least 7 tumblers, extended number of effective closing differences
H at least 8 tumblers, extended number of effective locking differences

DIN 18273

Handle sets of fire and smoke protection hardware are certified according to this standard.

the door handle sets are distinguished between:

  • standard fittings
  • anti-panic fittings
  • exchangeable wires

All fittings for fire and smoke protection doors belong to the group of special fittings with building authority approval.
Manufacturer's marks for these are: DIN 18273 FS (fire protection set) or DIN 18273 RD (smoke protection set).

Door handle sets that comply with this standard are mechanically designed in such a way that, when used properly, the function and protective effect of the fitting are ensured even after a long period of use.
This also ultimately ensures the protective effect of the door closure on which it was mounted.

DIN 18273 applies to all types of lever handles in single or double-leaf design.

Key features are:

  • The square pin used to operate the lever handle must be made of steel and basically have a cross-section of 9 x 9 mm.
  • Fire door handle sets must withstand 200,000 opening and closing operations during endurance testing.
  • Doors equipped with fire protection fittings must still be accessible after a fire.

DIN 18251-1

mortise locks for rebated doors

defines terms, dimensions, requirements, tests and marking of mortise locks with latch and/or deadbolt, including mortise locks with self-locking function

DIN 18251-2

mortise locks for tubular frame doors

specifies terms, dimensions, requirements, tests and marking of mortise locks with latch and/or deadbolt, including mortise locks with self-locking, suitable for installation in narrow stile doors

DIN 18251-3

mortise locks for multipoint locking systems

DIN 18251-3 specifies the terms, dimensions, requirements, tests and marking of mortise locks as multipoint locks with latch and deadbolt including multipoint locks with self-locking. This DIN standard is only valid for multipoint locks which are intended for the installation of a profile cylinder according to DIN 18252. It does not apply to multipoint locks in escape doors.

DIN 18251 T 2 and T 3

serve as a basis for the security recommendation of the police and for the publication of the manufacturer directory of the Police Crime Prevention Commission (CPC) on tested and certified burglar-resistant products

DIN EN 1906

are the European standard and the international guideline for fittings. This test simulates the behavior of the product in daily use