Product Category


High-precision Switch


High-precision Switch for Detecting Micron-unit Displacement



Electrical ratings

Contact output models

M5, M8, M16 Type: 10 mA at 24 VAC, 10 mA at 12 VDC

Solid-state output models

100 mA at 5 to 24 VDC ± 10%
 Leakage current: 0.15 mA max.
 Residual voltage: 3 V max.
 Power consumption: 3 mW max.


Degree of protection

D5A-1[], D5A-2[]: IP40
 Other than the above models: IP67

Repeat accuracy *1

M5 (D5A-1[][][] series), M8, slim type:1 μm max.

M5 (D5A-2[][][] series), M16, limit type:3 μm max.

Durability *2


10,000,000 operations min.


1,000,000 operation min. (Contact output models: 24 VAC, 10 mA, resistive load,
 Solid-state output models: 24 VAC, 100 mA, resistive load)

Deviation in electrical durability
 after 1,000,000 operations

M5, M8, M16, slim type: 10 μm max.

Limit type: 20 μm max.

Operating speed

1 μm/s to 0.5 m/s

Rated frequency

50/60 Hz

Insulation resistance

100 MΩ min. (at 250 VDC) between each terminal and non-current-carrying metal part

Contact resistance
 (Initial value) *4

800 mΩ max. (initial) with 1 m cable,
 2.4 Ω max. (initial) with 3 m cable,
 4 Ω max. (initial) with 5 m cable

Dielectric strength

1,000 VAC, 50/60 Hz for 1 min between each terminal and non-current-carrying metal part



10 to 55 Hz, 1.5-mm double amplitude



1,000 m/s2 max.


300 m/s2 max.

Temperature coefficient *3

M5, M8, slim type: ± 20 × 10-6/ ° C max.
M16 type: ± 40 × 10-6/ ° C max.
Limit type: ± 50 × 10-6/ ° C max.

Ambient operating temperature

-20°C to +75°C (with no icing)

Ambient operating humidity

35% to 85% RH (35% to 95% RH with the seal rubber)

Note: The above figures are initial values.
 1. Contact your OMRON sales representative for measurement conditions of the repeat accuracy.
 2. Durability values are calculated at an operating temperature of +5°C to +35°C, and an operating humidity of 40% to 70%RH. Contact your OMRON sales representative for more detailed information on other operating environments.
 3. The value indicates the operating position change rate for a change of 1°C in the ambient temperature. The specifications depend on the model.
 Contact your OMRON sales representative for details.
 4. Values for contact output models.